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Kress DJ, Morgan PM, Thomas DC, Haselhuhn JJ, Polly DW. Prevalence of total joint arthroplasty in the adult spine deformity population. Spine Deform 2024; 12:1421-1429. [PMID: 38592647 DOI: 10.1007/s43390-024-00869-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Accepted: 03/21/2024] [Indexed: 04/10/2024]
Abstract
PURPOSE The spine, hip, and knee are anatomically and biomechanically connected. Total hip arthroplasty (THA) and total knee arthroplasty (TKA) are commonly employed to treat degenerative changes in the hip and knee, while fusion is used for spine degeneration. Spine deformity correction results in changes in sagittal alignment and pelvic parameters, and patients with stiff spines have higher rates of THA dislocation and revision due to instability. The goal of this study was to determine the prevalence of total joint arthroplasty (TJA) in adult spinal deformity (ASD) patients at our institution. METHODS Following Institutional Review Board approval, we retrospectively reviewed a list of cases performed by the senior author from 4/2017 to 5/2021. Patients > 18 years old undergoing preoperative evaluation for symptomatic lumbar degeneration or ASD were included. Patients < 18 years old, those diagnosed with adolescent idiopathic scoliosis, and non-fusion cases were excluded. Perioperative full-length standing EOS images were examined for the presence or absence of THA, TKA, or both. Demographic data was collected from patient electronic medical records, and statistical analyses were completed. RESULTS 572 consecutive cases were reviewed, and 322 were excluded. 250 cases (97M:153F) were included in the final analysis, with a mean age of 61.8 ± 11.2 years. A total of 74 patients had a TJA (29.4%). THA was present in 41 patients (16.4%), and TKA was present in 49 patients (19.6%). Males had a higher prevalence of TJA, THA, and TKA (29.9%, 16.5%, and 21.6%) than females (29.4%, 16.3%, and 18.3%). CONCLUSIONS This study revealed a high prevalence TJA rate of 29.4% in ASD at our institution. This rate surpasses the prevalence rate reported among the general population in previous studies. High prevalence of patients with ASD and TJA may merit special surgical consideration.
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Affiliation(s)
- Dustin J Kress
- Department of Orthopedic Surgery, University of Minnesota, 2512 South 7th Street, Suite R200, Minneapolis, MN, 55454, USA.
| | - Patrick M Morgan
- Department of Orthopedic Surgery, University of Minnesota, 2512 South 7th Street, Suite R200, Minneapolis, MN, 55454, USA
| | - Dylan C Thomas
- Department of Orthopedic Surgery, University of Minnesota, 2512 South 7th Street, Suite R200, Minneapolis, MN, 55454, USA
| | - Jason J Haselhuhn
- Department of Orthopedic Surgery, University of Minnesota, 2512 South 7th Street, Suite R200, Minneapolis, MN, 55454, USA
| | - David W Polly
- Department of Orthopedic Surgery, University of Minnesota, 2512 South 7th Street, Suite R200, Minneapolis, MN, 55454, USA.
- Department of Neurosurgery, University of Minnesota, Minneapolis, MN, USA.
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Fontalis A, Zhao B, Putzeys P, Mancino F, Zhang S, Vanspauwen T, Glod F, Plastow R, Mazomenos E, Haddad FS. Is it feasible to develop a supervised learning algorithm incorporating spinopelvic mobility to predict impingement in patients undergoing total hip arthroplasty? Bone Jt Open 2024; 5:671-680. [PMID: 39139101 PMCID: PMC11322786 DOI: 10.1302/2633-1462.58.bjo-2024-0020.r1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 08/15/2024] Open
Abstract
Aims Precise implant positioning, tailored to individual spinopelvic biomechanics and phenotype, is paramount for stability in total hip arthroplasty (THA). Despite a few studies on instability prediction, there is a notable gap in research utilizing artificial intelligence (AI). The objective of our pilot study was to evaluate the feasibility of developing an AI algorithm tailored to individual spinopelvic mechanics and patient phenotype for predicting impingement. Methods This international, multicentre prospective cohort study across two centres encompassed 157 adults undergoing primary robotic arm-assisted THA. Impingement during specific flexion and extension stances was identified using the virtual range of motion (ROM) tool of the robotic software. The primary AI model, the Light Gradient-Boosting Machine (LGBM), used tabular data to predict impingement presence, direction (flexion or extension), and type. A secondary model integrating tabular data with plain anteroposterior pelvis radiographs was evaluated to assess for any potential enhancement in prediction accuracy. Results We identified nine predictors from an analysis of baseline spinopelvic characteristics and surgical planning parameters. Using fivefold cross-validation, the LGBM achieved 70.2% impingement prediction accuracy. With impingement data, the LGBM estimated direction with 85% accuracy, while the support vector machine (SVM) determined impingement type with 72.9% accuracy. After integrating imaging data with a multilayer perceptron (tabular) and a convolutional neural network (radiograph), the LGBM's prediction was 68.1%. Both combined and LGBM-only had similar impingement direction prediction rates (around 84.5%). Conclusion This study is a pioneering effort in leveraging AI for impingement prediction in THA, utilizing a comprehensive, real-world clinical dataset. Our machine-learning algorithm demonstrated promising accuracy in predicting impingement, its type, and direction. While the addition of imaging data to our deep-learning algorithm did not boost accuracy, the potential for refined annotations, such as landmark markings, offers avenues for future enhancement. Prior to clinical integration, external validation and larger-scale testing of this algorithm are essential.
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Affiliation(s)
- Andreas Fontalis
- Department of Trauma and Orthopaedic Surgery, University College Hospital, London, UK
- Division of Surgery and Interventional Science, University College London, London, UK
- Wellcome/EPSRC Centre for Interventional and Surgical Sciences, University College London, London, UK
| | - Baixiang Zhao
- Wellcome/EPSRC Centre for Interventional and Surgical Sciences, University College London, London, UK
| | | | - Fabio Mancino
- Department of Trauma and Orthopaedic Surgery, University College Hospital, London, UK
| | - Shuai Zhang
- Wellcome/EPSRC Centre for Interventional and Surgical Sciences, University College London, London, UK
| | | | - Fabrice Glod
- Hôpitaux Robert Schuman, Luxembourg City, Luxembourg
| | - Ricci Plastow
- Department of Trauma and Orthopaedic Surgery, University College Hospital, London, UK
| | - Evangelos Mazomenos
- Wellcome/EPSRC Centre for Interventional and Surgical Sciences, University College London, London, UK
| | - Fares S. Haddad
- Department of Trauma and Orthopaedic Surgery, University College Hospital, London, UK
- Division of Surgery and Interventional Science, University College London, London, UK
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Kleeman-Forsthuber L, Kurkis G, Madurawe C, Jones T, Plaskos C, Pierrepont JW, Dennis DA. Hip-spine parameters change with increasing age. Bone Joint J 2024; 106-B:792-801. [PMID: 39084653 DOI: 10.1302/0301-620x.106b8.bjj-2023-1197.r1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 08/02/2024]
Abstract
Aims Spinopelvic pathology increases the risk for instability following total hip arthroplasty (THA), yet few studies have evaluated how pathology varies with age or sex. The aims of this study were: 1) to report differences in spinopelvic parameters with advancing age and between the sexes; and 2) to determine variation in the prevalence of THA instability risk factors with advancing age. Methods A multicentre database with preoperative imaging for 15,830 THA patients was reviewed. Spinopelvic parameter measurements were made by experienced engineers, including anterior pelvic plane tilt (APPT), spinopelvic tilt (SPT), sacral slope (SS), lumbar lordosis (LL), and pelvic incidence (PI). Lumbar flexion (LF), sagittal spinal deformity, and hip user index (HUI) were calculated using parameter measurements. Results With advancing age, patients demonstrate increased posterior APPT, decreased standing LL, decreased LF, higher pelvic incidence minus lumbar lordosis (PI-LL) mismatch, higher prevalence of abnormal spinopelvic mobility, and higher HUI percentage. With each decade, APPT progressed posteriorly 2.1°, LF declined 6.0°, PI-LL mismatch increased 2.9°, and spinopelvic mobility increased 3.8°. Significant differences were found between the sexes for APPT, SPT, SS, LL, and LF, but were not felt to be clinically relevant. Conclusion With advancing age, spinopelvic biomechanics demonstrate decreased spinal mobility and increased pelvic/hip mobility. Surgeons should consider the higher prevalence of instability risk factors in elderly patients and anticipate changes evolving in spinopelvic biomechanics for young patients.
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Affiliation(s)
| | | | | | | | | | | | - Douglas A Dennis
- Colorado Joint Replacement, Denver, Colorado, USA
- Department of Mechanical and Materials Engineering, University of Denver, Denver, Colorado, USA
- Department of Orthopaedics, University of Colorado School of Medicine, Denver, Colorado, USA
- Department of Biomedical Engineering, University of Tennessee, Knoxville, Tennessee, USA
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Scanlon CM, Christensen T, Bieganowski T, Buehring W, Meftah M, Hepinstall MS. "Stuck in the middle": the missing lumbosacral link in total hip arthroplasty. Hip Int 2024; 34:482-486. [PMID: 38469810 DOI: 10.1177/11207000231223706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/13/2024]
Abstract
INTRODUCTION Spinopelvic mobility drives functional acetabular position, influencing dislocation risk after total hip arthroplasty (THA). Patients have been described as "stuck sitting" or "stuck standing" based on pelvic tilt (PT). We hypothesised that some patients are "stuck in the middle," meaning their PT changes minimally from sitting to standing - increasing their risk of dislocation. METHODS We reviewed 195 patients with standing and sitting whole body radiographs prior to THA. Standing anterior pelvic plane tilt (APPT) and standing and sitting sacral slope (SS) were measured and used to calculate sitting APPT. Normal standing and sitting were defined as APPT >-10° and <-20°, respectively. Spinal stiffness was classified as <10° change in sacral slope between sitting and standing. Patients were categorised as: (A) able to fully sit and stand; (B) "stuck sitting" - able to fully sit; unable to fully stand; (C) "stuck standing" - able to fully stand; unable to fully sit; or (D) "stuck in the middle" - unable to sit or stand fully. RESULTS 84 patients could sit and stand normally (A), 22 patients were stuck sitting (B), 76 patients were stuck standing (C), and 13 patients were stuck in the middle (D). While 111 patients (56.9%) were considered stuck, only 58 patients (29.7%) met criteria for spinal stiffness. DISCUSSION We identified a subset of patients with stiff spines and abnormal PT in both sitting and standing, including 37.1% of patients who would be classified as "stuck sitting" based only on standing radiographs. Placing acetabular components in less than anatomic anteversion in these patients may increase posterior dislocation risk.
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Affiliation(s)
| | - Thomas Christensen
- Department of Orthopaedic Surgery, NYU Langone Health, New York, NY, USA
| | - Thomas Bieganowski
- Department of Orthopaedic Surgery, NYU Langone Health, New York, NY, USA
| | - Weston Buehring
- Department of Orthopaedic Surgery, NYU Langone Health, New York, NY, USA
| | - Morteza Meftah
- Department of Orthopaedic Surgery, NYU Langone Health, New York, NY, USA
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Innmann MM, Merle C, Ratra A, Speirs A, Adamczyk A, Murray D, Gill HS, Grammatopoulos G. The Relationship of Cup Inclination and Anteversion in the Coronal Plane with Ante-Inclination in the Sagittal Plane: Exposing the Fallacy of Cup Safe Zones. JB JS Open Access 2024; 9:e23.00120. [PMID: 38994529 PMCID: PMC11236406 DOI: 10.2106/jbjs.oa.23.00120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/13/2024] Open
Abstract
Background This study aimed to establish an equation for calculating cup ante-inclination (AI) from radiographic cup inclination and anteversion, to validate this equation in a total hip arthroplasty (THA) cohort, and to test whether achieving previously described radiographic cup inclination and anteversion targets would also satisfy sagittal cup AI targets. Methods A mathematical equation linking cup AI, radiographic inclination (RI), and anteversion (RA) was determined: tan(AI) = tan(RA)/cos(RI). Supine and standing anteroposterior and lateral radiographs of 440 consecutive THAs were assessed to measure cup RI and RA and spinopelvic parameters, including cup AI, using a validated software tool. Whether orientation within previously defined RI and RA targets was associated with achieving the AI target and satisfying the sagittal component orientation (combined sagittal index, 205° to 245°) was tested. Results The cups in the THA cohort had a measured mean inclination (and standard deviation) of 43° ± 7°, anteversion of 26° ± 9°, and AI of 34° ± 10°. The calculated cup AI was 34° ± 12°. A strong correlation existed between measured and calculated AI (r = 0.75; p < 0.001), with a mean error of 0° ± 8°. The inclination and anteversion targets were both satisfied in 194 (44.1%) to 330 (75.0%) of the cases, depending on the safe zone targets that were used, and 311 cases (70.7%) satisfied the AI target. Only 125 (28.4%) to 233 (53.0%) of the cases satisfied the AI target as well as the inclination and anteversion targets. Satisfying inclination and anteversion targets was not associated with increased chances of satisfying the AI target. Conclusions Achieving optimal cup inclination and anteversion does not ensure optimal orientation in the sagittal plane. The equation and nomograms provided can be used to determine and visualize how the 2 planes used for evaluating the cup orientation and the pertinent angles relate, potentially aiding in preoperative planning.
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Affiliation(s)
- Moritz M Innmann
- Division of Orthopaedic Surgery, The Ottawa Hospital, Ottawa, Ontario, Canada
- Department of Orthopaedic Surgery, University of Heidelberg, Heidelberg, Germany
| | | | - Akaash Ratra
- Division of Orthopaedic Surgery, The Ottawa Hospital, Ottawa, Ontario, Canada
| | - Andrew Speirs
- Department of Mechanical and Aerospace Engineering, Carleton University, Ottawa, Ontario, Canada
| | - Andrew Adamczyk
- Department of Orthopaedic Surgery, Banner Health, Phoenix, Arizona
- University of Arizona College of Medicine, Phoenix, Arizona
| | - David Murray
- Nuffield Department of Orthopaedics, Rheumatology & Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom
| | - Harinderjit S Gill
- Department of Mechanical Engineering/Centre for Therapeutic Innovation, University of Bath, Bath, United Kingdom
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Pagan CA, Karasavvidis T, Vigdorchik JM, DeCook CA. Spinopelvic Motion: A Simplified Approach to a Complex Subject. Hip Pelvis 2024; 36:77-86. [PMID: 38825817 PMCID: PMC11162876 DOI: 10.5371/hp.2024.36.2.77] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 04/01/2024] [Accepted: 04/01/2024] [Indexed: 06/04/2024] Open
Abstract
Knowledge of the relationship between the hip and spine is essential in the effort to minimize instability and improve outcomes following total hip arthroplasty (THA). A detailed yet straightforward preoperative imaging workup can provide valuable information on pelvic positioning, which may be helpful for optimum placement of the acetabular cup. For a streamlined preoperative assessment of THA candidates, classification systems with a capacity for providing a more personalized approach to performance of THA have been introduced. Familiarity with these systems and their clinical application is important in the effort to optimize component placement and reduce the risk of instability. Looking ahead, the principles of the hip-spine relationship are being integrated using emerging innovative technologies, promising further streamlining of the evaluation process.
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Affiliation(s)
- Cale A. Pagan
- Adult Reconstruction and Joint Replacement Service, Hospital for Special Surgery, New York, NY, USA
| | - Theofilos Karasavvidis
- Adult Reconstruction and Joint Replacement Service, Hospital for Special Surgery, New York, NY, USA
| | - Jonathan M. Vigdorchik
- Adult Reconstruction and Joint Replacement Service, Hospital for Special Surgery, New York, NY, USA
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Kim Y, Vergari C, Tokuyasu H, Shimizu Y, Takemoto M. The Impact of Pelvic Incidence on Spinopelvic and Hip Alignment and Mobility in Asymptomatic Subjects. J Bone Joint Surg Am 2024:00004623-990000000-01109. [PMID: 38781320 DOI: 10.2106/jbjs.23.00493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
BACKGROUND The influence of pelvic incidence (PI) on spinopelvic and hip alignment and mobility has not been well investigated. The aim of this study was to evaluate the influence of PI on spinopelvic and hip alignment and mobility, including the pelvic-femoral angle (PFA) and motion (ΔPFA), in functional positions in a cohort of asymptomatic volunteers. METHODS This was a single-center, prospective, cross-sectional study. We included 136 healthy volunteers (69% female; mean age, 38 ± 11 years; mean body mass index, 22 ± 3 kg/m2) divided into 3 subgroups on the basis of their PI: PI < 45° (low PI), 45° ≤ PI ≤ 60° (medium PI), and PI > 60° (high PI). We made full-body lateral radiographs in free-standing, standing with extension, relaxed-seated, and flexed-seated positions. We measured the sacral slope (SS), lumbar lordosis (LL), and PFA. We calculated lumbar (∆LL), pelvic (∆SS), and hip (∆PFA) mobilities as the change between the standing (i.e., standing with or without extension) and sitting (i.e., relaxed-seated or flexed-seated) positions. RESULTS There were significant differences between some of the 3 subgroups with respect to the LL, SS, and PFA in each of the 4 positions. There were no significant differences in ΔLL, ΔSS, or ΔPFA between the 3 groups when moving from a standing to a sitting position. PI had an inverse linear correlation with PFAextension (R = -0.48; p < 0.0001), PFAstanding (R = -0.53; p < 0.0001), PFArelaxed-seated (R = -0.37; p < 0.0001), and PFAflexed-seated (R = -0.47; p < 0.0001). However, PI was not correlated with ΔPFAstanding/relaxed-seated (R = -0.062; p = 0.48) or ΔPFAextension/flexed-seated (R = -0.12; p = 0.18). Similarly, PI was not significantly correlated with ΔLL or ΔSS in either pair of positions. CONCLUSIONS This study confirmed that spinopelvic and hip parameters in functional positions were affected by PI, whereas lumbar, pelvic, and hip mobilities did not depend on PI. These findings suggest that hip surgeons should consider the PI of the patient to determine the patient's specific functional safe zones before and after total hip arthroplasty. LEVEL OF EVIDENCE Prognostic Level II. See Instructions for Authors for a complete description of levels of evidence.
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Affiliation(s)
- Youngwoo Kim
- Department of Orthopaedic Surgery, Kyoto City Hospital, Kyoto, Japan
| | - Claudio Vergari
- Institut de Biomécanique Humaine Georges Charpak, Arts et Métiers Institute of Technology, Université Sorbonne Paris Nord, Paris, France
| | | | - Yu Shimizu
- Department of Orthopaedic Surgery, Kyoto City Hospital, Kyoto, Japan
| | - Mitsuru Takemoto
- Department of Orthopaedic Surgery, Kyoto City Hospital, Kyoto, Japan
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Łaziński M, Niemyjski W, Niemyjski M, Olewnik Ł, Drobniewski M, Synder M, Borowski A. Mobility of the lumbo-pelvic-hip complex (spinopelvic mobility) and sagittal spinal alignment - implications for surgeons performing hip arthroplasty. Arch Orthop Trauma Surg 2024; 144:1945-1953. [PMID: 38554202 DOI: 10.1007/s00402-024-05241-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 02/17/2024] [Indexed: 04/01/2024]
Abstract
INTRODUCTION The optimal positioning of the hip prosthesis components is influenced by the mobility and balance of the spine. The present study classifies patients with pathology of the spino-pelvic-hip complex, showing possible methods of preventing hip dislocations after arthroplasty. HYPOTHESIS Hip-Spine Classification helps arthroplasty surgeons to implant components in more patient-specific position. MATERIALS AND METHODS The group of 100 patients treated with total hip arthroplasty. Antero-posterior (AP) X-rays of the pelvis in a standing position, lateral spine (standing and sitting) and AP of the pelvis (supine after the procedure) were analyzed. We analyzed a change in sacral tilt value when changing from standing to sitting (∆SS), Pelvic Incidence (PI), Lumbar Lordosis (LL) Mismatch, sagittal lumbar pelvic balance (standing position). Patients were classified according to the Hip-Spine Classification. Postoperatively, the inclination and anteversion of the implanted acetabular component were measured. RESULTS In our study 1 A was diagnosed in 61% of all cases, 1B in 18%, 2 A in 16%, 2B in 5%. 50 out of 61 (82%) in group 1 A were placed within the Levinnek "safe zone". In 1B, 2 A, 2B, the position of the acetabular component was influenced by both the spinopelvic mobility and sagittal spinal balance. The mean inclination was 43.35° and the anteversion was 17.4°. CONCLUSIONS Categorizing patients according to Hip-Spine Classification one can identify possible consequences the patients at risk. Pathology of the spino-pelvic-hipcomplex can lead to destabilization or dislocation of hip after surgery even though implanted according to Lewinnek's indications. Our findings suggest that Lewinnek safe zone should be abandoned in favor of the concept of functional safe zones.
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Affiliation(s)
- Mariusz Łaziński
- Szpital Wojewódzki im. Jana Pawła II w Bełchatowie, Oddział Chirurgii Urazowo- Ortopedycznej, Bełchatów, Poland
- Clinic of Orthopedics and Pediatric Orthopedics, Medical University of Lodz, 92-213 Lodz, ul. Pomorska 251, Lodz, Poland
| | - Włodzimierz Niemyjski
- Szpital Wojewódzki im. Jana Pawła II w Bełchatowie, Oddział Chirurgii Urazowo- Ortopedycznej, Bełchatów, Poland
| | - Michał Niemyjski
- Szpital Wojewódzki im. Jana Pawła II w Bełchatowie, Oddział Chirurgii Urazowo- Ortopedycznej, Bełchatów, Poland
| | - Łukasz Olewnik
- Department of Anatomical Dissection and Donation, Medical University of Lodz, Lodz, Poland
| | - Marek Drobniewski
- Clinic of Orthopedics and Pediatric Orthopedics, Medical University of Lodz, 92-213 Lodz, ul. Pomorska 251, Lodz, Poland
| | - Marek Synder
- Clinic of Orthopedics and Pediatric Orthopedics, Medical University of Lodz, 92-213 Lodz, ul. Pomorska 251, Lodz, Poland
| | - Andrzej Borowski
- Clinic of Orthopedics and Pediatric Orthopedics, Medical University of Lodz, 92-213 Lodz, ul. Pomorska 251, Lodz, Poland.
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Taleb S, Broberg JS, Lanting BA, Teeter MG. Phantom validation of a novel RSA-based impingement metric to assess component-on-component impingement risk. Proc Inst Mech Eng H 2024; 238:483-487. [PMID: 38519832 PMCID: PMC11083746 DOI: 10.1177/09544119241238950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/25/2024]
Abstract
Component-on-component impingement in total hip arthroplasty may lead to post-operative complications including dislocation. Despite numerous clinical studies focusing on reducing this risk, assessment methods remain limited to qualitative radiography, finite element analysis, and cadaver studies. There is a need for more precise measurements of impingement in the research setting. We aimed to validate a novel RSA-based impingement metric to measure component-on-component impingement in vivo. A phantom experiment of a standard metal-on-polyethylene total hip system was performed. RSA examinations were performed as typical for a traditional weight-bearing RSA exam for large joints. The phantom was placed in 10 possible impinged positions and one neutral position. Double exposure radiographs were taken to measure repeatability. The closest distance between the skirt of the head and the inner circumference of the acetabular cup liner was measured to assess impingement risk. Distances between the closest point of the hood to the edge of the cup in 10 impinged positions ranged from 0.05 to 1.03 mm, with the average being 0.67 mm. In the neutral position, the distance measured is 11.02 mm. Excellent repeatability was observed, with a standard deviation of 0.03 mm with an r value of 0.09. A validated RSA-based risk metric was established to evaluate in vivo hip impingement. A 1 mm threshold may be proposed to define impingement where distances approaching 1.00 mm are at a greater risk of impingement. This simplified metric holds promise for upcoming clinical studies on component-on-component impingement.
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Affiliation(s)
- Shahnaz Taleb
- Imaging Group, Robarts Research Institute, Schulich School of Medicine and Dentistry, Western University, London, ON, Canada
| | - Jordan S Broberg
- Imaging Group, Robarts Research Institute, Schulich School of Medicine and Dentistry, Western University, London, ON, Canada
| | - Brent A Lanting
- Division of Orthopedic Surgery, Department of Surgery, University Hospital, London Health Sciences Center, London, ON, Canada
| | - Matthew G Teeter
- Imaging Group, Robarts Research Institute, Schulich School of Medicine and Dentistry, Western University, London, ON, Canada
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Verhaegen JCF, Alves Batista N, Foster R, Graham R, Phan P, Grammatopoulos G. What patient parameters influence lumbar stiffness in patients with hip pathology? J Orthop Res 2024; 42:1054-1065. [PMID: 37997704 DOI: 10.1002/jor.25749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 11/06/2023] [Accepted: 11/14/2023] [Indexed: 11/25/2023]
Abstract
Lumbar stiffness leads to greater hip dependence to achieve sagittal motion and increases instability after total hip arthroplasty (THA). We aimed to determine parameters that influence lumbar stiffness among patients with hip pathology. We hypothesized that modifiable (degenerative changes, spinal canal stenosis, facet orientation) and nonmodifiable factors (muscle condition) would be associated with lumbar spine stiffness. In this retrospective case-cohort study from a tertiary referral center, consecutive patients presenting at a hip specialist clinic underwent standing and deep-seated radiographic assessment to measure lumbar lordosis (∆LL) (stiffness: ∆LL < 20°), hip flexion (∆PFA: pelvic femoral angle), and degree of degenerative-disc-disease (DDD) (facet osteoarthritis, disc height, endplate proliferative changes). Of these, 65 patients were selected with previous lumbar spine magnetic resonance imaging, allowing to determine lumbar facet orientation, spinal canal stenosis (Schizas classification), and flexor- and extensor-muscle atrophy (Goutallier classification). Mean ∆LL was 45° (range: 11°-72°) and four patients (6%) exhibited spine stiffness. Patients with multilevel DDD (n = 22) had less ∆LL than those with no/single level (n = 43) DDD (34° [range: 11°-53°] vs. 51° [21°-72°]; p < 0.001). Number of DDD levels correlated strongly with ∆LL (ρ = -0.642; p < 0.001). Spinal stiffness was only seen in patients with ≥4 DDD levels. There was no correlation between ∆LL and facet orientation (p > 0.05). ∆LL correlated strongly with extensor atrophy at L3-L4 (ρ = -0.473), L4-L5 (ρ = -0.520), and L5-S1 (ρ = -0.473) and poorly with flexors at L4-L5 (ρ = -0.134) and L5-S1 (ρ = -0.227). Lumbar stiffness is dependent on modifiable (muscle atrophy) and nonmodifiable (extend of DDD) factors. This can guide nonoperative management of hip pathology, emphasizing the relevance of core muscle rehabilitation to improve posture and stiffness. Identification ≥4 DDD levels should alert surgeons of increased THA instability risk. Level of evidence: level IV, cohort series.
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Affiliation(s)
- Jeroen C F Verhaegen
- Department of Orthopaedic Surgery, The Ottawa Hospital, Ottawa, Ontario, Canada
- Department of Orthopaedics & Traumatology, University Hospital Antwerp, Edegem, Belgium
- Orthopedic Center Antwerp, AZ Monica, Antwerp, Belgium
| | - Nuno Alves Batista
- Department of Orthopaedic Surgery, The Ottawa Hospital, Ottawa, Ontario, Canada
| | - Ryan Foster
- Department of Radiology, The Ottawa Hospital, Ottawa, Ontario, Canada
| | - Ryan Graham
- School of Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - Philippe Phan
- Department of Orthopaedic Surgery, The Ottawa Hospital, Ottawa, Ontario, Canada
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Drakou A, Altsitzioglou P, Sioutis S, Roustemis AG, Mastrokalos DS, Koulalis D. Optimizing Hip Replacement Procedure in Cerebral Palsy-Related Spastic Hip Dysplasia: A Case Report. Cureus 2024; 16:e57584. [PMID: 38707032 PMCID: PMC11069124 DOI: 10.7759/cureus.57584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/04/2024] [Indexed: 05/07/2024] Open
Abstract
Cerebral palsy (CP) often results in severe hip issues, disrupting musculoskeletal development and mobility due to problems such as dislocations and contractures, aggravated by spasticity and heightened muscular tone. While total hip arthroplasty (THA) is required in CP patients, the procedure carries high risks due to concerns about dislocation and wear. This study explores a method of intraoperative navigation to precisely execute preoperative strategies for spinopelvic alignment and optimal cup placement. We discuss a case of a 22-year-old male CP patient with bilateral hip dislocations who experienced significant discomfort, impeding mobility and affecting his performance as a Paralympic rower. He underwent bilateral hip replacement surgeries, guided by preoperative gait analysis and imaging, with navigation aiding in accurate acetabular component placement and correction of excessive femoral anteversion using a modular stem. The patient achieved excellent stability in both standing and rowing postures. Overall, computer navigation enhances complex hip repair by facilitating intraoperative data collection and precise execution of preoperative plans. This approach may extend the lifespan of prostheses, particularly by achieving precise acetabular component placement based on spinopelvic alignment principles, thereby offering significant benefits for CP patients undergoing THA.
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Affiliation(s)
- Androniki Drakou
- Department of Orthopaedic Surgery, Laiko University Hospital, Athens, GRC
| | | | - Spyridon Sioutis
- 1st Department of Orthopaedic Surgery, Attikon University Hospital, Athens, GRC
| | | | | | - Dimitrios Koulalis
- 1st Department of Orthopaedic Surgery, Attikon University Hospital, Athens, GRC
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Di Martino A, Geraci G, Brunello M, D'Agostino C, Davico G, Curreli C, Traina F, Faldini C. Hip-spine relationship: clinical evidence and biomechanical issues. Arch Orthop Trauma Surg 2024; 144:1821-1833. [PMID: 38472450 PMCID: PMC10965652 DOI: 10.1007/s00402-024-05227-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Accepted: 02/15/2024] [Indexed: 03/14/2024]
Abstract
The hip-spine relationship is a critical consideration in total hip arthroplasty (THA) procedures. While THA is generally successful in patient, complications such as instability and dislocation can arise. These issues are significantly influenced by the alignment of implant components and the overall balance of the spine and pelvis, known as spinopelvic balance. Patients with alteration of those parameters, in particular rigid spines, often due to fusion surgery, face a higher risk of THA complications, with an emphasis on complications in instability, impingement and dislocation. For these reasons, over the years, computer modelling and simulation techniques have been developed to support clinicians in the different steps of surgery. The aim of the current review is to present current knowledge on hip-spine relationship to serve as a common platform of discussion among clinicians and engineers. The offered overview aims to update the reader on the main critical aspects of the issue, from both a theoretical and practical perspective, and to be a valuable introductory tool for those approaching this problem for the first time.
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Affiliation(s)
- Alberto Di Martino
- Ist Orthopaedic Department, IRCCS-Istituto Ortopedico Rizzoli, Via Giulio Cesare Pupilli, 1, 40136, Bologna, Italy.
- Department of Biomedical and Neuromotor Science-DIBINEM, University of Bologna, 40136, Bologna, Italy.
| | - Giuseppe Geraci
- Ist Orthopaedic Department, IRCCS-Istituto Ortopedico Rizzoli, Via Giulio Cesare Pupilli, 1, 40136, Bologna, Italy
- Department of Biomedical and Neuromotor Science-DIBINEM, University of Bologna, 40136, Bologna, Italy
| | - Matteo Brunello
- Ist Orthopaedic Department, IRCCS-Istituto Ortopedico Rizzoli, Via Giulio Cesare Pupilli, 1, 40136, Bologna, Italy
- Department of Biomedical and Neuromotor Science-DIBINEM, University of Bologna, 40136, Bologna, Italy
| | - Claudio D'Agostino
- Ist Orthopaedic Department, IRCCS-Istituto Ortopedico Rizzoli, Via Giulio Cesare Pupilli, 1, 40136, Bologna, Italy
- Department of Biomedical and Neuromotor Science-DIBINEM, University of Bologna, 40136, Bologna, Italy
| | - Giorgio Davico
- Medical Technology Lab, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
- Department of Industrial Engineering, Alma Mater Studiorum - University of Bologna, Bologna, Italy
| | - Cristina Curreli
- Medical Technology Lab, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Francesco Traina
- Department of Biomedical and Neuromotor Science-DIBINEM, University of Bologna, 40136, Bologna, Italy
- Ortopedia-Traumatologia e Chirurgia Protesica e dei Reimpianti di Anca e di Ginocchio, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Cesare Faldini
- Ist Orthopaedic Department, IRCCS-Istituto Ortopedico Rizzoli, Via Giulio Cesare Pupilli, 1, 40136, Bologna, Italy
- Department of Biomedical and Neuromotor Science-DIBINEM, University of Bologna, 40136, Bologna, Italy
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13
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Fontalis A, Kayani B, Plastow R, Giebaly DE, Tahmassebi J, Haddad IC, Chambers A, Mancino F, Konan S, Haddad FS. A prospective randomized controlled trial comparing CT-based planning with conventional total hip arthroplasty versus robotic arm-assisted total hip arthroplasty. Bone Joint J 2024; 106-B:324-335. [PMID: 38555946 DOI: 10.1302/0301-620x.106b4.bjj-2023-1045.r1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/02/2024]
Abstract
Aims Achieving accurate implant positioning and restoring native hip biomechanics are key surgeon-controlled technical objectives in total hip arthroplasty (THA). The primary objective of this study was to compare the reproducibility of the planned preoperative centre of hip rotation (COR) in patients undergoing robotic arm-assisted THA versus conventional THA. Methods This prospective randomized controlled trial (RCT) included 60 patients with symptomatic hip osteoarthritis undergoing conventional THA (CO THA) versus robotic arm-assisted THA (RO THA). Patients in both arms underwent pre- and postoperative CT scans, and a patient-specific plan was created using the robotic software. The COR, combined offset, acetabular orientation, and leg length discrepancy were measured on the pre- and postoperative CT scanogram at six weeks following surgery. Results There were no significant differences for any of the baseline characteristics including spinopelvic mobility. The absolute error for achieving the planned horizontal COR was median 1.4 mm (interquartile range (IQR) 0.87 to 3.42) in RO THA versus 4.3 mm (IQR 3 to 6.8; p < 0.001); vertical COR mean 0.91 mm (SD 0.73) in RO THA versus 2.3 mm (SD 1.3; p < 0.001); and combined offset median 2 mm (IQR 0.97 to 5.45) in RO THA versus 3.9 mm (IQR 2 to 7.9; p = 0.019). Improved accuracy was observed with RO THA in achieving the desired acetabular component positioning (root mean square error for anteversion and inclination was 2.6 and 1.3 vs 8.9 and 5.3, repectively) and leg length (mean 0.6 mm vs 1.4 mm; p < 0.001). Patient-reported outcome measures were comparable between the two groups at baseline and one year. Participants in the RO THA group needed fewer physiotherapy sessions postoperatively (median six (IQR 4.5 to 8) vs eight (IQR 6 to 11; p = 0.005). Conclusion This RCT suggested that robotic-arm assistance in THA was associated with improved accuracy in restoring the native COR, better preservation of the combined offset, leg length correction, and superior accuracy in achieving the desired acetabular component positioning. Further evaluation through long-term and registry data is necessary to assess whether these findings translate into improved implant survival and functional outcomes.
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Affiliation(s)
- Andreas Fontalis
- Department of Trauma and Orthopaedic Surgery, University College London Hospitals NHS Foundation Trust, London, UK
- Division of Surgery and Interventional Science, University College London, London, UK
| | - Babar Kayani
- Department of Trauma and Orthopaedic Surgery, University College London Hospitals NHS Foundation Trust, London, UK
| | - Ricci Plastow
- Department of Trauma and Orthopaedic Surgery, University College London Hospitals NHS Foundation Trust, London, UK
| | - Dia E Giebaly
- Department of Trauma and Orthopaedic Surgery, University College London Hospitals NHS Foundation Trust, London, UK
- Division of Surgery and Interventional Science, University College London, London, UK
| | - Jenni Tahmassebi
- Department of Trauma and Orthopaedic Surgery, University College London Hospitals NHS Foundation Trust, London, UK
| | - Isabella C Haddad
- Department of Trauma and Orthopaedic Surgery, University College London Hospitals NHS Foundation Trust, London, UK
| | - Alastair Chambers
- Department of Trauma and Orthopaedic Surgery, University College London Hospitals NHS Foundation Trust, London, UK
| | - Fabio Mancino
- Department of Trauma and Orthopaedic Surgery, University College London Hospitals NHS Foundation Trust, London, UK
| | - Sujith Konan
- Department of Trauma and Orthopaedic Surgery, University College London Hospitals NHS Foundation Trust, London, UK
- Division of Surgery and Interventional Science, University College London, London, UK
| | - Fares S Haddad
- Department of Trauma and Orthopaedic Surgery, University College London Hospitals NHS Foundation Trust, London, UK
- Division of Surgery and Interventional Science, University College London, London, UK
- The Bone & Joint Journal , London, UK
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14
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Pour AE, Innmann MM, Reichel F, Schaper B, Renkawitz T, Merle C, Grammatopoulos G. How Do Spinopelvic Characteristics Change Post-Total Hip Arthroplasty? A Longitudinal Assessment Raising Awareness of the Postoperative Period. J Arthroplasty 2024:S0883-5403(24)00199-2. [PMID: 38460739 DOI: 10.1016/j.arth.2024.02.079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 02/24/2024] [Accepted: 02/27/2024] [Indexed: 03/11/2024] Open
Abstract
BACKGROUND Spinopelvic characteristics, including sacral slope (SS), are commonly evaluated in different positions pre-total hip arthroplasty (THA). This study aimed to: 1) investigate the change in spinopelvic parameters at 7 days (early) and 1-year post-THA; and 2) identify patient characteristics associated with a change in SS of more than 7° post-THA. METHODS We prospectively studied 250 patients who underwent unilateral THA [132 women, age 66 years (range, 32 to 88)] and underwent biplanar images preoperatively and at 7 days and 1-year post-THA. Parameters measured included pelvic incidence, standing lumbar lordosis, SS, and proximal femoral angle (PFA). A SS change ≥ 7° was considered the threshold as it would result in more than a 5° change in cup orientation. RESULTS Early post-THA SSstanding remained within ± 6º from preoperative measurements in 75% of patients, reduced by ≥ 7° in 9%, and increased by ≥ 7° in 16%. Those that showed a reduction in SS had the lowest PFA and the highest SS pre-THA (P = .028, .107, and < 0.001, respectively). From 7 days until the 1-year mark, pelvic tilt increased, SS reduced (mean: -4º, range: -29 to 17º, P < .001), and patients stood with greater hip extension ΔPFAstanding (mean 7°, range: -34 to 37°, P < .001). At 1 year, SSseated had remained within ± 6º, relative to the pre-THA value, in 49% of patients. CONCLUSIONS Standing spinopelvic characteristics, especially SSstanding, remain within ±6° in three-quarters of patients both early- and at 1-year post-THA. In the remaining cases, pelvic tilt changes significantly. In 9% of cases, SS reduces ≥ 7° early THA, probably due to the alleviation of fixed-flexion contractures. The SSseated changes by ≥ ± 7° in almost 50% of cases in this study, and its clinical value as a preoperative planning tool should be questioned. LEVEL OF EVIDENCE Level II, diagnostic study.
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Affiliation(s)
- Aidin E Pour
- Department of Orthopaedic Surgery, Yale University, New Haven, Connecticut
| | - Moritz M Innmann
- Division of Orthopaedic Surgery, The Ottawa Hospital, Ontario, Canada; Department of Orthopaedic and Trauma Surgery, University of Heidelberg, Heidelberg, Germany
| | | | - Bibiane Schaper
- Department of Orthopaedic and Trauma Surgery, University of Heidelberg, Heidelberg, Germany
| | - Tobias Renkawitz
- Department of Orthopaedic and Trauma Surgery, University of Heidelberg, Heidelberg, Germany
| | - Christian Merle
- Division of Orthopaedic Surgery, The Ottawa Hospital, Ontario, Canada; Diakonie Klinikum Stuttgart, Stuttgart, Germany
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Mohamed NS, Salib CG, Sax OC, Remily EA, Douglas SJ, Delanois RE. Spinal fusion and total hip arthroplasty: why timing is important. Hip Int 2024; 34:174-180. [PMID: 37644619 DOI: 10.1177/11207000231197420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
BACKGROUND There is increasing debate among orthopaedic surgeons over the temporal relationship between lumbar spinal fusion (LSF) and total hip arthroplasty (THA) for patients with hip-spine syndrome. Few large studies have directly compared the results of patients who undergo LSF prior to THA (LSF-THA) to those who undergo LSF after THA (THA-LSF). The current study matched THA patients with a prior LSF to patients who underwent LSF after THA to assess: 90-day and 1-year (1) medical/surgical complications; and (2) revisions. METHODS We queried a national, all-payer database to identify all patients undergoing THA between 2010 and 2018 (n = 716,084). The LSF-THA patients and THA-LSF patients were then matched 1:1 on age, sex, Charleson Comorbidity Index, and obesity. Medical/surgical complications and revisions at 90 days and 1 year were recorded. Categorical and continuous variables were analysed utilising t-tests and chi-square, respectively. RESULTS LSF-THA patients experienced significantly more postoperative dislocations at 90 days and 1 year compared to THA-LSF patients (p = 0.048 and p < 0.001). There were a similar number of revisions performed for LSF-THA and THA-LSF patients at both 90 days and 1 year (p = 0.183 and p = 0.426). Furthermore, at 1 year, LSF-THA patients experienced more pneumonia (p = 0.005) and joint infection (p = 0.020). CONCLUSIONS Prior LSF has been demonstrated to increase the risk of postoperative dislocation in patients undergoing THA. The results of the present study demonstrate increased dislocations with LSF-THA compared to THA-LSF. For "hip spine syndrome" patients requiring both LSF and THA, it may be more beneficial to undergo THA prior to LSF. Arthroplasty surgeons may wish to collaborate with spinal surgeons to ensure optimal outcomes for this group of patients.
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Affiliation(s)
- Nequesha S Mohamed
- Department of Orthopaedic Surgery, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Christopher G Salib
- Rubin Institute for Advanced Orthopedics, Center for Joint Preservation and Replacement, Sinai Hospital of Baltimore, Baltimore, MD, USA
| | - Oliver C Sax
- Rubin Institute for Advanced Orthopedics, Center for Joint Preservation and Replacement, Sinai Hospital of Baltimore, Baltimore, MD, USA
| | - Ethan A Remily
- Rubin Institute for Advanced Orthopedics, Center for Joint Preservation and Replacement, Sinai Hospital of Baltimore, Baltimore, MD, USA
| | - Scott J Douglas
- Rubin Institute for Advanced Orthopedics, Center for Joint Preservation and Replacement, Sinai Hospital of Baltimore, Baltimore, MD, USA
| | - Ronald E Delanois
- Rubin Institute for Advanced Orthopedics, Center for Joint Preservation and Replacement, Sinai Hospital of Baltimore, Baltimore, MD, USA
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16
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Kouyoumdjian P. How the hip-spine relationship influences total hip arthroplasty. Orthop Traumatol Surg Res 2024; 110:103773. [PMID: 38000509 DOI: 10.1016/j.otsr.2023.103773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 06/30/2023] [Indexed: 11/26/2023]
Abstract
INTRODUCTION Motion in the spine, pelvis and hips which make up the spinopelvic femoral complex (SPFC) implies mechanical relationships that help maintain trunk balance and optimize hip functionThe aim of this study was to understand the physiology of the SPFC and evaluate the dysfunctions of the SPFC and their implications for total hip arthroplasty considering the hip-spine relationship. METHODS A review of relevant and comprehensive studies on this subject is reported in order to highlight a pathophysiology that integrates the description of the evaluations of the spine-pelvic and hip parameters and recommendations for the kinematic planning of the THA procedure. The primary objective was to determine which type of hip-spine relationship has the highest risk for THA complications and to become proficient in selecting the priority surgical intervention when both the hip and spine are affected. Finally, this review attempted to assist hip surgeons with surgical technique, tools, implant selection, and goals of planning a THA that requires personalized kinematic alignment. Determine the influence of THA on these kinematics and the effect of stiffness of the lumbopelvic complex on the risk of THA failure. RESULTS When a person sits, the pelvis goes into retroversion and the acetabulum opens forward. This frees the femoral head and neck to allow hip flexion. The opposite - pelvic anteversion - occurs when a person stands. When pelvic mobility is limited, the hip must increase its range of motion to accommodate these posture changes. Disturbances in spinal and pelvic kinematics lead to abnormal hip function, which may contribute to complications following total hip arthroplasty (THA). CONCLUSION A precise evaluation of the parameters governing the SPFC must be taken into account in order to best optimize the placement and choice of THA implants. LEVEL OF EVIDENCE IV.
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Affiliation(s)
- Pascal Kouyoumdjian
- CHU de Nîmes, Faculté de Médecine Montpellier-Nîmes, Université Montpellier, Hôpital Carémeau, 4, place du Professeur-Robert-Debré, 30900 Nîmes, France.
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Giai Via R, Migliorini F, Bosco F, Onorato F, Secco DC, Giustra F, Lavia AD, Giachino M, Massè A. Superior outcomes of total hip arthroplasty without prior lumbar arthrodesis: a systematic review and meta-analysis. EUROPEAN JOURNAL OF ORTHOPAEDIC SURGERY & TRAUMATOLOGY : ORTHOPEDIE TRAUMATOLOGIE 2024; 34:699-711. [PMID: 37847406 PMCID: PMC10857961 DOI: 10.1007/s00590-023-03761-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 10/06/2023] [Indexed: 10/18/2023]
Abstract
PURPOSE The number of patients undergoing total hip arthroplasty (THA) surgery after previous lumbar arthrodesis (LA) is rising. Literature suggests that LA may significantly impact pelvic biomechanics and potentially compromise the success of prosthetic hip replacement. This study aims to evaluate complication rates, dislocation rates, and revision rates in patients with prior LA undergoing THA surgery compared to those undergoing THA surgery without prior LA. METHODS A systematic review and meta-analysis were conducted following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. A PICOS template was developed to ensure a structured approach. The search for relevant studies was performed across five databases, including Pubmed, Scopus, Embase, Medline, and Cochrane. The selected articles were evaluated based on the Levels of Evidence (LoE) criteria. The Coleman Methodology Score (mCMS) was employed to analyze the retrospective studies. This systematic review and meta-analysis were registered in the International Prospective Register of Systematic Reviews (PROSPERO). For the outcomes that allowed for a meta-analysis performed using R software, a p < 0.05 was considered statistically significant. RESULTS The final analysis included seventeen studies comprising a total of 3,139,164 cases of THA. Among these cases, 3,081,137 underwent THA surgery alone, while 58,027 patients underwent THA with a previous LA. The study investigated various factors, including dislocation rates, revision rates, and complication, as well as the surgical approach and type of implant used, for both the THA-only group and the group of patients who underwent THA with prior LA. The analysis revealed a statistically significant difference (p < 0.05) for all variables studied, favoring the group of patients who underwent THA alone without prior LA. CONCLUSIONS This systematic review and meta-analysis demonstrated a statistically significant superiority in all analyzed outcomes for patients who underwent THA-only without prior LA. Specifically, patients with isolated THA implants experienced significantly lower incidences of THA dislocation, wound complications, periprosthetic joint infection, revision, and mechanical complications. LEVEL OF EVIDENCE Level IV.
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Affiliation(s)
- Riccardo Giai Via
- Centro Traumatologico Ortopedico (CTO), Department of Orthopaedic Surgery, University of Turin, Via Gianfranco Zuretti, 29, 10126, Turin, Italy
| | - Filippo Migliorini
- Department of Orthopaedic, Trauma and Reconstructive Surgery, RWTH University Medical Centre, 52074, Aachen, Germany
- Department of Orthopedics and Trauma Surgery, Academic Hospital of Bolzano (SABES-ASDAA), 39100, Bolzano, Italy
| | - Francesco Bosco
- Centro Traumatologico Ortopedico (CTO), Department of Orthopaedic Surgery, University of Turin, Via Gianfranco Zuretti, 29, 10126, Turin, Italy.
- Department of Orthopaedics and Traumatology, Ospedale San Giovanni Bosco di Torino - ASL Città di Torino, Turin, Italy.
- Department of Orthopaedics and Traumatology (DiChirOnS), University of Palermo, Palermo, Italy.
| | - Francesco Onorato
- Centro Traumatologico Ortopedico (CTO), Department of Orthopaedic Surgery, University of Turin, Via Gianfranco Zuretti, 29, 10126, Turin, Italy
| | - Davide Carlo Secco
- Centro Traumatologico Ortopedico (CTO), Department of Orthopaedic Surgery, University of Turin, Via Gianfranco Zuretti, 29, 10126, Turin, Italy
| | - Fortunato Giustra
- Centro Traumatologico Ortopedico (CTO), Department of Orthopaedic Surgery, University of Turin, Via Gianfranco Zuretti, 29, 10126, Turin, Italy
- Department of Orthopaedics and Traumatology, Ospedale San Giovanni Bosco di Torino - ASL Città di Torino, Turin, Italy
| | | | - Matteo Giachino
- Centro Traumatologico Ortopedico (CTO), Department of Orthopaedic Surgery, University of Turin, Via Gianfranco Zuretti, 29, 10126, Turin, Italy
| | - Alessandro Massè
- Centro Traumatologico Ortopedico (CTO), Department of Orthopaedic Surgery, University of Turin, Via Gianfranco Zuretti, 29, 10126, Turin, Italy
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18
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Fontalis A, Haddad FS. A leap towards personalized orthopaedic surgery and the prediction of spinopelvic mechanics in total hip arthroplasty. Bone Joint J 2024; 106-B:3-5. [PMID: 38160698 DOI: 10.1302/0301-620x.106b1.bjj-2023-1319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Affiliation(s)
- Andreas Fontalis
- Department of Trauma and Orthopaedics, University College London NHS Hospitals, London, UK
- Princess Grace Hospital, London, UK
| | - Fares S Haddad
- Department of Trauma and Orthopaedics, University College London NHS Hospitals, London, UK
- Princess Grace Hospital, London, UK
- The NIHR Biomedical Research Centre, UCLH, London, UK, London, UK
- The Bone & Joint Journal , London, UK
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19
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Innmann M, Verhaegen J, Renkawitz T, Merle C, Grammatopoulos G. How to Screen for Lumbar Spine Stiffness in Patients Awaiting Total Hip Arthroplasty. J Arthroplasty 2024; 39:124-131. [PMID: 37567351 DOI: 10.1016/j.arth.2023.08.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 07/30/2023] [Accepted: 08/01/2023] [Indexed: 08/13/2023] Open
Abstract
BACKGROUND This study aimed to (1) define the prevalence of spinopelvic abnormalities among patients who have hip osteoarthritis (OA) and controls (asymptomatic volunteers) and (2) identify factors that reliably predict the presence of lumbar spine stiffness. METHODS This is a prospective, cross-sectional, case-cohort study of patients who have end-stage primary hip OA, who underwent primary total hip arthroplasty (THA). Patients were compared with a cohort of asymptomatic volunteers, matched for age, sex, and body mass index (BMI), serving as a control group. Spinopelvic pathologies were defined as: lumbar spine flatback deformity (difference of 10 or more degrees for pelvic incidence minus lumbar lordosis angle), a standing sagittal pelvic tilt of 19° or more and lumbar spine stiffness (lumbar flexion of less than 20° between both postures). RESULTS The prevalence of spinopelvic pathologies was similar between patients and controls (flatback deformity: 16% versus 10%, P = .209; standing pelvic tilt >19°: 17% versus 24%, P = .218; lumbar spine stiffness: 6% versus 5%, P = .827). Age over 65 years-old and standing lumbar lordosis angle less than 45° were associated with high sensitivity and specificity for identifying lumbar spine stiffness (age >65 years: 82% and 66%; standing lumbar lordosis angle <45°: 85% and 73%). CONCLUSION The presence of end-stage hip osteoarthritis was not associated with increased prevalence of adverse spinopelvic characteristics compared to matched, asymptomatic volunteers. Age and LLstanding are the strongest predictors of lumbar spine flexion and can guide clinical practice on when to obtain additional radiographs for patients who have hip OA before arthroplasty to identify at-risk patients. LEVEL OF EVIDENCE II (prospective, cohort study).
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Affiliation(s)
- Moritz Innmann
- Division of Orthopaedic Surgery, The Ottawa Hospital, Critical Care Wing, Ottawa, Ontario, Canada; Department of Orthopaedic Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Jeroen Verhaegen
- Division of Orthopaedic Surgery, The Ottawa Hospital, Critical Care Wing, Ottawa, Ontario, Canada; Department of Orthopaedic Surgery, University Hospital Antwerp, Edegem, Belgium
| | - Tobias Renkawitz
- Department of Orthopaedic Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Christian Merle
- Department of Orthopaedic Surgery, Heidelberg University Hospital, Heidelberg, Germany; Diakonie Klinikum Stuttgart, Stuttgart, Germany
| | - George Grammatopoulos
- Division of Orthopaedic Surgery, The Ottawa Hospital, Critical Care Wing, Ottawa, Ontario, Canada
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20
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Sai Sathikumar A, Jacob G, Thomas AB, Varghese J, Menon V. Acetabular cup positioning in primary routine total hip arthroplasty-a review of current concepts and technologies. ARTHROPLASTY 2023; 5:59. [PMID: 38037156 PMCID: PMC10691035 DOI: 10.1186/s42836-023-00213-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Accepted: 09/15/2023] [Indexed: 12/02/2023] Open
Abstract
INTRODUCTION Total hip arthroplasty (THA) has revolutionized the treatment of hip joint arthritis. With the increased popularity and success of the procedure, research has focused on improving implant survival and reducing surgical complications. Optimal component orientation has been a constant focus with various philosophies proposed. Regardless of the philosophy, achieving an accurate acetabular position for each clinical scenario is crucial. In this paper, we review the recent developments in improving the accuracy and ideal positioning of the acetabular cup in routine primary THA. METHODOLOGY A review of the recent scientific literature for acetabular cup placement in primary THA was performed, with available evidence for safe zones, spinopelvic relationship, preoperative planning, patient-specific instrumentation, navigation THA and robotic THA. CONCLUSION Though the applicability of Lewinnek safe zones has been questioned with an improved understanding of spinopelvic relationships, its role remains in positioning the acetabular cup in a patient with normal spinopelvic alignment and mobility. Evaluation of spinopelvic relationships and accordingly adjusting acetabular anteversion and inclination can significantly reduce the incidence of dislocation in patients with a rigid spine. In using preoperative radiography, the acetabular inclination, anteversion and intraoperative pelvic position should be evaluated. With improving technology and the advent of artificial intelligence, superior and more accurate preoperative planning is possible. Patient-specific instrumentation, navigated and robotic THA have been reported to improve accuracy in acetabular cup positioning as decided preoperatively but any significant clinical advantage over conventional THA is yet to be elucidated.
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Affiliation(s)
- Aravind Sai Sathikumar
- Division of Joint Replacement and Sports Medicine, VPS Lakeshore Hospital: Lakeshore Hospital and Research Centre Ltd, Kochi, Kerala, 682040, India.
| | - George Jacob
- Division of Joint Replacement and Sports Medicine, VPS Lakeshore Hospital: Lakeshore Hospital and Research Centre Ltd, Kochi, Kerala, 682040, India
| | - Appu Benny Thomas
- Division of Joint Replacement and Sports Medicine, VPS Lakeshore Hospital: Lakeshore Hospital and Research Centre Ltd, Kochi, Kerala, 682040, India
| | - Jacob Varghese
- Division of Joint Replacement and Sports Medicine, VPS Lakeshore Hospital: Lakeshore Hospital and Research Centre Ltd, Kochi, Kerala, 682040, India
| | - Venugopal Menon
- Department of Orthopaedics, Bharati Vidyapeeth Deemed University, Pune, Maharashtra, 411043, India
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21
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Chung BC, Stefl M, Kang HP, Hah RJ, Wang JC, Dorr LD, Heckmann ND. Increased dislocation rates following total hip arthroplasty in patients with ankylosing spondylitis. Hip Int 2023; 33:1026-1034. [PMID: 36192824 DOI: 10.1177/11207000221126968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND Patients with ankylosing spondylitis (AS) experience abnormal spinopelvic motion due to chronic inflammation of the axial skeleton, predisposing them to impingement and dislocation. The purpose of this study was to evaluate total hip arthroplasty (THA) dislocation rates in AS patients and evaluate the effects of age and gender on dislocation risk. METHODS Patients who underwent primary THA from 2005 to 2014 were identified using the PearlDiver database. AS patients were compared to age- and gender-matched controls without AS. Patients with a history of spine pathology or spine surgery were excluded. Univariate analyses were performed based on age and sex to evaluate dislocation rates at 90 days, 6 months, 1 year, and 5 years postoperatively. RESULTS A total of 2792 THA patients (59.6% male) with AS were identified and compared to an age- and gender-matched control group of 5582 THA patients (59.5% male) without AS or known spine pathology. At final follow-up, there were 96 dislocations (3.4%) in the AS group and 138 (2.5%) dislocations in the control group (OR 1.40; 95% CI, 1.08-1.83; p = 0.0118). AS patients ⩾70 years old had higher dislocation rates at all time points (OR range, 1.75-2.09; p < 0.05) compared to controls. At 5-year follow-up, dislocation-free survivorship was 95.7% (95% CI, 94.5-96.9%) for AS patients ⩾70 years old compared to 97.3% (95% CI, 96.6-98.0%) for patients ⩾70 years old without AS. CONCLUSIONS Older AS patients have higher dislocation rates following THA. This effect is likely related to decreased spinopelvic motion in the sagittal plane, predisposing patients to impinge and dislocate.
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Affiliation(s)
- Brian C Chung
- Department of Orthopaedic Surgery, Keck School of Medicine of the University of Southern California, Los Angeles, CA, USA
| | - Michael Stefl
- Department of Orthopaedic Surgery, McFarland Clinic, Ames, IA, USA
| | - Hyunwoo Paco Kang
- Department of Orthopaedic Surgery, Keck School of Medicine of the University of Southern California, Los Angeles, CA, USA
| | - Raymond J Hah
- Department of Orthopaedic Surgery, Keck School of Medicine of the University of Southern California, Los Angeles, CA, USA
| | - Jeffrey C Wang
- Department of Orthopaedic Surgery, Keck School of Medicine of the University of Southern California, Los Angeles, CA, USA
| | - Lawrence D Dorr
- Dorr Institute for Arthritis Research and Education, Torrance, CA, USA
| | - Nathanael D Heckmann
- Department of Orthopaedic Surgery, Keck School of Medicine of the University of Southern California, Los Angeles, CA, USA
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22
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Kim K, Kwon S, Kwon J, Hwang J. A review of robotic-assisted total hip arthroplasty. Biomed Eng Lett 2023; 13:523-535. [PMID: 37872985 PMCID: PMC10590363 DOI: 10.1007/s13534-023-00312-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 08/02/2023] [Accepted: 08/11/2023] [Indexed: 10/25/2023] Open
Abstract
Total hip arthroplasty (THA) is a successful surgical method for hip replacement but still poses challenges and risks. Robotic-assisted THA (rTHA) using new generation robotic systems has emerged to improve surgical precision and outcomes. The purpose of this paper is to review the literature on rTHA, with a focus on its advantages, such as individualized preoperative planning, intraoperative assistance, and improved accuracy in implantation, especially in complex cases. Additionally, it aims to explore the disadvantages associated with the use of rTHA, including high costs, the learning curve, and prolonged operation time compared to manual THA (mTHA), which are critical drawbacks that require careful consideration and efforts for minimization. Some financial analyses suggest that rTHA may offer cost-effectiveness and reduced postoperative costs compared to mTHA. While technological advancements are expected to reduce technical complications, there are still debates surrounding long-term outcomes. Practical limitations, such as limited availability and accessibility, also warrant attention. Although the development of rTHA shows promise, it is still in its early stages, necessitating critical evaluation and further research to ensure optimal patient benefits.
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Affiliation(s)
- Kwangkyoun Kim
- Department of Orthopaedic Surgery, Gangnam Sacred Heart Hospital, Hallym University School of Medicine, Seoul, South Korea
- Department of Orthopaedic Surgery, Konyang University School of Medicine, Daejeon, South Korea
| | - Seungcheol Kwon
- Department of Orthopaedic Surgery, Gangnam Sacred Heart Hospital, Hallym University School of Medicine, Seoul, South Korea
- Department of Orthopaedic Surgery, Konyang University School of Medicine, Daejeon, South Korea
| | - Junhyuk Kwon
- Department of Orthopaedic Surgery, Gangnam Sacred Heart Hospital, Hallym University School of Medicine, Seoul, South Korea
- Department of Orthopaedic Surgery, Konyang University School of Medicine, Daejeon, South Korea
| | - Jihyo Hwang
- Department of Orthopaedic Surgery, Gangnam Sacred Heart Hospital, Hallym University School of Medicine, Seoul, South Korea
- Department of Orthopaedic Surgery, Konyang University School of Medicine, Daejeon, South Korea
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23
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Fujii J, Aoyama S, Tezuka T, Kobayashi N, Kawakami E, Inaba Y. Prediction of Change in Pelvic Tilt After Total Hip Arthroplasty Using Machine Learning. J Arthroplasty 2023; 38:2009-2016.e3. [PMID: 35788030 DOI: 10.1016/j.arth.2022.06.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 06/27/2022] [Accepted: 06/27/2022] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND A postoperative change in pelvic flexion following total hip arthroplasty (THA) is considered to be one of the causes of dislocation. This study aimed to predict the change of pelvic flexion after THA integrating preoperative and postoperative information with artificial intelligence. METHODS This study involved 415 hips which underwent primary THA. Pelvic flexion angle (PFA) is defined as the angle created by the anterior pelvic plane and the horizontal/vertical planes in the supine/standing positions, respectively. Changes in PFA from preoperative supine position to standing position at 5 years after THA were recorded and which were defined as a 5-year change in PFA. Machine learning analysis was performed to predict 5-year change in PFA less than -20° using demographic, blood biochemical, and radiographic data as explanatory variables. Decision trees were constructed based on the important predictors for 5-year change in PFA that can be handled by humans in clinical practice. RESULTS Among several machine learning models, random forest showed the highest accuracy (area under the curve = 0.852). Lumbo-lordotic angle, femoral anteversion angle, body mass index, pelvic tilt, and sacral slope were most important random forest predictors. By integrating these preoperative predictors with those obtained 1 year after the surgery, we developed a clinically applicable decision tree model that can predict 5-year change in PFA with area under the curve = 0.914. CONCLUSION A machine learning model to predict 5-year change in PFA after THA has been developed by integrating preoperative and postoperative patient information, which may have capabilities for preoperative planning of THA.
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Affiliation(s)
- Junpei Fujii
- Department of Orthopaedic Surgery, Yokohama City University, Yokohama, Kanagawa, Japan
| | - Shotaro Aoyama
- Department of Orthopaedic Surgery, Yokohama City University, Yokohama, Kanagawa, Japan; Medical Sciences Innovation Hub Program, RIKEN, Yokohama, Kanagawa, Japan; Advanced Data Science Project, RIKEN, Yokohama, Kanagawa, Japan
| | - Taro Tezuka
- Department of Orthopaedic Surgery, Yokohama City University, Yokohama, Kanagawa, Japan
| | - Naomi Kobayashi
- Department of Orthopaedic Surgery, Yokohama City University, Yokohama, Kanagawa, Japan
| | - Eiryo Kawakami
- Medical Sciences Innovation Hub Program, RIKEN, Yokohama, Kanagawa, Japan; Advanced Data Science Project, RIKEN, Yokohama, Kanagawa, Japan; Artificial Intelligence Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Yutaka Inaba
- Department of Orthopaedic Surgery, Yokohama City University, Yokohama, Kanagawa, Japan
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24
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Soydan Z, Bayramoglu E, Altas O, Şen C. Revealing the Effect of Spinopelvic Alignment on Hip Disorders. CLINICAL MEDICINE INSIGHTS. ARTHRITIS AND MUSCULOSKELETAL DISORDERS 2023; 16:11795441231191790. [PMID: 37701625 PMCID: PMC10493047 DOI: 10.1177/11795441231191790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 07/14/2023] [Indexed: 09/14/2023]
Abstract
Background Hip osteoarthritis (HOA) is a growing burden and one of the leading causes of hip pain. The relationship between the HOA and the alignment of the spinopelvic region has been intensively studied, however the issue remains controversial. Spinopelvic imbalance, HOA, and dysplasia were investigated in relation to sagittal spinopelvic parameters in this study. Methods We collected computerized tomography (CT) topograms of the pelvis or abdomen from 380 patients. In antero-posterior (AP) topograms, Tonnis grading, center-edge angle (CEA) and Sharp's acetabular angle (AA) measurements were performed on each patient. Lateral topograms were used to evaluate the following spinopelvic parameters for each patient: pelvic incidence (PI), pelvic tilt (PT), sacral slope (SS), sacral table angle (STA), lumbar lordosis (LL), proximal lumbar lordosis (PLL), distal lumbar lordosis (DLL), and PI-LL difference. Initially, the cohort was divided into two subgroups based on whether or not they had HOA. Then, they were divided into two subgroups based on whether or not they had dysplasia. Ultimately, it was divided in half based on the PI-LL imbalance. Statistical analyses were conducted to determine the likely correlations between the spinopelvic parameters of these subgroups. In addition, the correlations between spinopelvic parameters were investigated. Results There were 380 patients evaluated. We found no association between HOA or dysplasia and spinopelvic parameters. In addition, there was no association between PI-LL imbalance and HOA or dysplasia. Conclusion There was no difference in constant PI and STA angle, besides other variable parameters, between groups having HOA and dysplasia or not. PI-LL imbalance has no effect on HOA and dysplasia.
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Affiliation(s)
- Zafer Soydan
- Department of Orthopaedics and Traumatology, BHT Clinic Istanbul Tema Hospital, Nişantaşı University, Istanbul, Turkey
| | - Emru Bayramoglu
- Department of Orthopaedics and Traumatology, Bursa City Hospital, Bursa, Turkey
| | - Okyar Altas
- Department of Orthopaedics and Traumatology, Basaksehir Cam Sakura City Hospital, Istanbul, Turkey
| | - Cengiz Şen
- Department of Orthopaedics and Traumatology, Faculty of Medicine, Istanbul University, Istanbul, Turkey
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Łaziński M, Niemyjski W, Niemyjski M, Synder M, Drobniewski M, Olewnik Ł, Borowski A. An Analysis of the Preoperative Factors, Spinopelvic Mobility and Sagittal Spinal Alignment in Pre-THA Patients. J Clin Med 2023; 12:5594. [PMID: 37685661 PMCID: PMC10488904 DOI: 10.3390/jcm12175594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Revised: 08/24/2023] [Accepted: 08/25/2023] [Indexed: 09/10/2023] Open
Abstract
Hip arthroplasty is a very effective medical procedure. The optimal positioning of the components and the functioning of the endoprosthesis are influenced, among other things, by the mobility and balance of the spine. The aim of the study was to analyze the factors influencing the mobility of the lumbar-pelvic-iliac complex (spinopelvic mobility) together with the assessment of sagittal spinal alignment in patients prior to THA (total hip arthroplasty). Patients who underwent hip replacement surgery due to advanced osteoarthritis of the hip were enrolled in the study (n = 103). The sociodemographic characteristics, BMI, radiological advancement of the degenerative disease, quality of life, and range of joint mobility were completed using a proprietary questionnaire, the EQ-5D-5L questionnaire, and a clinical examination. X-ray images were analyzed: AP of the pelvis standing up, lateral of the spine standing and sitting. Key parameters were measured as ∆SS-change in sacrum angle value when changing from standing to sitting position and pelvic incidence (PI)-lumbar lordosis (LL) mismatch-sagittal lumbar pelvic balance measured in standing position. The patients were assigned to the appropriate groups according to the Hip-Spine Classification: normal group: 1A (n = 65; 63.1%), abnormal groups: 1B (n = 17; 16.5%), 2A (n = 16; 15.5%), 2B (n = 5; 4.9%). A correlation was shown between the abnormal groups and the individual components of PROMs in the scope of the self-service and normal activities categories (EQ-5D and EQ-VAS). However, the strength of the relationship turned out to be moderate, and the remaining components of the survey were statistically insignificant. The remaining factors analyzed, i.e., age, BMI, the range of hip motion, the presence of contracture in the joint in a clinical examination, and the radiological advancement of osteoarthritis on the Tonnis scale, do not predict abnormal relationships between the spine and the pelvis in our patients waiting for THA. Therefore, further investigations are needed to evaluate the correlation between preoperative factors and the lumbar-pelvic-iliac complex in patients prior to planned hip arthroplasty.
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Affiliation(s)
- Mariusz Łaziński
- Oddział Chirurgii Urazowo-Ortopedycznej, Szpital Wojewódzki im. Jana Pawła II w Bełchatowie, 97-400 Bełchatów, Poland; (M.Ł.); (W.N.); (M.N.)
| | - Włodzimierz Niemyjski
- Oddział Chirurgii Urazowo-Ortopedycznej, Szpital Wojewódzki im. Jana Pawła II w Bełchatowie, 97-400 Bełchatów, Poland; (M.Ł.); (W.N.); (M.N.)
| | - Michał Niemyjski
- Oddział Chirurgii Urazowo-Ortopedycznej, Szpital Wojewódzki im. Jana Pawła II w Bełchatowie, 97-400 Bełchatów, Poland; (M.Ł.); (W.N.); (M.N.)
| | - Marek Synder
- Orthopaedics and Paediatrics Orthopaedics Clinic, Medical University of Lodz, 90-151 Lodz, Poland; (M.S.); (M.D.)
| | - Marek Drobniewski
- Orthopaedics and Paediatrics Orthopaedics Clinic, Medical University of Lodz, 90-151 Lodz, Poland; (M.S.); (M.D.)
| | - Łukasz Olewnik
- Department of Anatomical Dissection and Donation, Medical University of Lodz, 90-151 Lodz, Poland;
| | - Andrzej Borowski
- Orthopaedics and Paediatrics Orthopaedics Clinic, Medical University of Lodz, 90-151 Lodz, Poland; (M.S.); (M.D.)
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26
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Sonoda K, Kubo Y, Komiyama K, Nakamura T, Hara T. Error of intraoperative measurement of stem anteversion is decreased by measuring in neutral hip position during total hip arthroplasty. J Orthop Sci 2023:S0949-2658(23)00217-8. [PMID: 37596167 DOI: 10.1016/j.jos.2023.08.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 07/15/2023] [Accepted: 08/08/2023] [Indexed: 08/20/2023]
Abstract
BACKGROUND Intraoperative stem anteversion, which is the angle between the lower leg axis and the trial-stem axis with hip flexion and adduction, is generally evaluated by the surgeon's visual estimation during total hip arthroplasty (THA). However, the conventional approach can be influenced by knee osteoarthritis or uncertain surgeon's observation point. Therefore, we developed a new method for measuring the stem anteversion angle in the neutral hip position using an original rod attached to the trial-stem perpendicular to the long axis and parallel to the stem neck. This study aimed to assess the accuracy of our method in comparison with the conventional method of measuring intraoperative stem anteversion angle. METHODS We measured the intraoperative stem anteversion angle in consecutive 106 hips of 106 patients who underwent cementless primary THA with a tapered wedge stem. Absolute error in the stem anteversion angle was expressed as the difference between intraoperative (common vs. neutral hip positions) and postoperative computed tomography measurements, i.e., true stem anteversion. Additionally, we investigated the factors affecting these errors. RESULTS The absolute error of measurement was significantly smaller in the neutral hip position than in the common position (3.0° ± 2.5° vs. 8.0° ± 3.9°; p < 0.0001). The factor associated with the error was advanced knee osteoarthritis in the common position, whereas it was not statistically significant in the neutral hip position. CONCLUSIONS This study suggests that the error in the intraoperative measurement of stem anteversion is decreased by measuring in the neutral hip position during THA.
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Affiliation(s)
- Kazuhiko Sonoda
- Department of Orthopaedic Surgery, Iizuka Hospital, 3-83 Yoshiomachi, Iizuka 820-8505, Japan.
| | - Yusuke Kubo
- Department of Orthopaedic Surgery, Iizuka Hospital, 3-83 Yoshiomachi, Iizuka 820-8505, Japan.
| | - Keisuke Komiyama
- Department of Orthopaedic Surgery, Iizuka Hospital, 3-83 Yoshiomachi, Iizuka 820-8505, Japan.
| | - Tetsuro Nakamura
- Department of Orthopaedic Surgery, Fukuoka Mirai Hospital, 3-5-1 Higashi-Ku, Fukuoka 813-0017, Japan.
| | - Toshihiko Hara
- Department of Orthopaedic Surgery, Iizuka Hospital, 3-83 Yoshiomachi, Iizuka 820-8505, Japan.
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27
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Li Y, Qian BP, Qiu Y, Yu Y, Wang B. Risk factors of hip joint structural changes following pedicle subtraction osteotomy for ankylosing spondylitis-related thoracolumbar kyphosis: a minimum two-year observation. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2023; 32:2293-2302. [PMID: 37154940 DOI: 10.1007/s00586-023-07726-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 03/02/2023] [Accepted: 04/18/2023] [Indexed: 05/10/2023]
Abstract
PURPOSE To determine the clinical- and surgical-related factors of hip joint structural changes in ankylosing spondylitis (AS) patients with thoracolumbar kyphosis who underwent PSO. METHODS Hip involvement was assessed by the Bath Ankylosing Spondylitis Radiology Hip Index (BASRI-h) and defined by a score of at least 2. 52 patients with BASRI-h scores maintained and 78 patients with BASRI-h scores increased during follow-up were retrospectively reviewed. Clinical data were recorded. Radiological assessment was performed preoperatively, postoperatively, and at the final follow-up. RESULTS No significant difference existed in age, gender and follow-up time between the groups, but earlier onset of AS, longer disease and kyphotic duration, and worse Bath Ankylosing Spondylitis Functional Index (BASFI) scores at the final follow-up were observed in patients with BASRI-h scores increased (P < 0.05). Besides, global kyphosis (GK), T1-pelvic angle (TPA), pelvic tilt (PT) and anterior pelvic plane angle (APPA) were always larger in patients with BASRI-h scores increased, accompanied with more sacral fixation (P < 0.05). Multivariate logistics regression showed that earlier onset of AS, longer kyphotic duration, larger preoperative GK, sacral fixation and larger APPA during follow-up were independent risk factors. CONCLUSION Earlier onset of AS and longer kyphotic duration were the clinical risk factors of hip joint structural changes in AS patients following PSO, while larger preoperative GK, sacral fixation in PSO and larger APPA during follow-up were the surgical-related factors. Surgeons should inform patients with risk factors of the possibility for severe hip joint structural changes after PSO.
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Affiliation(s)
- Yao Li
- Division of Spine Surgery, Department of Orthopedic Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Zhongshan Road 321, Nanjing, 210008, China
| | - Bang-Ping Qian
- Division of Spine Surgery, Department of Orthopedic Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Zhongshan Road 321, Nanjing, 210008, China.
| | - Yong Qiu
- Division of Spine Surgery, Department of Orthopedic Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Zhongshan Road 321, Nanjing, 210008, China
| | - Yang Yu
- Division of Spine Surgery, Department of Orthopedic Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Zhongshan Road 321, Nanjing, 210008, China
| | - Bin Wang
- Division of Spine Surgery, Department of Orthopedic Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Zhongshan Road 321, Nanjing, 210008, China
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28
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Feingold JD, Srikumar S, Vaswani R, White AE, Swartwout EL, Ranawat AS. The Outcome of Hip Arthroscopy in the Setting of Lumbar Spine Disease Is Beneficial, Yet Limited: A Systematic Review of Existing Evidence. Arthroscopy 2023; 39:1568-1583. [PMID: 36191731 DOI: 10.1016/j.arthro.2022.09.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 09/04/2022] [Accepted: 09/22/2022] [Indexed: 11/05/2022]
Abstract
PURPOSE To compare hip arthroscopy outcomes in femoroacetabular impingement (FAI) patients with concurrent symptomatic lumbar spine disease to the outcomes of arthroscopic FAI patients without spine disease. METHODS A systematic review was performed according to PRISMA guidelines via PubMed, Cochrane, Embase, and Google Scholar databases. Studies were valid for inclusion if they had an average follow-up ≥12 months and compared patient-reported outcome measures (PROMs) in hip arthroscopy patients with and without concurrent spinal disease. Data collected included study characteristics, patient demographics, follow-up intervals, surgical indications, spinal pathology, PROMs, and reoperation rates. RESULTS Twelve studies were included in this systematic review. 3,107 patients who underwent hip arthroscopy were evaluated: 1,056 with coexisting lumbar spine disease (spine cohort) and 2,051 control subjects without spine disease (control cohort). The average follow-up period was 24 months. Across included studies, there were 35 instances wherein postoperative PROM scores reported by each cohort were compared. In all 35 instances, the spine cohort reported inferior postoperative PROM scores with the difference being significant (P < .05) on 23 PROMs. Collectively, 23 cases were available contrasting the proportion of each cohort to achieve the minimal clinically important difference (MCID). In 22 (95.65%) of these cases, the spine cohort achieved the MCID at a lower rate than the control cohort. There were 14 PROMs, wherein intragroup analyses were reported that compared the preoperative and postoperative score reported by the spine cohort. On all 14 PROMs, the spine cohort reported significant (P < .05) improvement after arthroscopic intervention. CONCLUSION FAI patients with coexisting lumbar spine pathology experience significant improvement from baseline state after arthroscopic intervention. However, the postoperative outcomes reported are inferior, and the improvement from arthroscopy was limited when compared to surgical control subjects with FAI and normal spinal anatomy. LEVEL OF EVIDENCE Level IV: systematic review of Level II, III, and IV studies.
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Affiliation(s)
| | | | - Ravi Vaswani
- Hospital for Special Surgery, New York, New York, USA
| | - Alex E White
- Hospital for Special Surgery, New York, New York, USA
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29
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Buchalter DB, Gall AM, Buckland AJ, Schwarzkopf R, Meftah M, Hepinstall MS. Creating Consensus in the Definition of Spinopelvic Mobility. J Am Acad Orthop Surg Glob Res Rev 2023; 7:01979360-202306000-00005. [PMID: 37294841 PMCID: PMC10256344 DOI: 10.5435/jaaosglobal-d-22-00290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 03/29/2023] [Indexed: 06/11/2023]
Abstract
INTRODUCTION The term "spinopelvic mobility" is most often applied to motion within the spinopelvic segment. It has also been used to describe changes in pelvic tilt between various functional positions, which is influenced by motion at the hip, knee, ankle and spinopelvic segment. In the interest of establishing a consistent language for spinopelvic mobility, we sought to clarify and simplify its definition to create consensus, improve communication, and increase consistency with research into the hip-spine relationship. METHODS A literature search was performed using the Medline (PubMed) library to identify all existing articles pertaining to spinopelvic mobility. We reported on the varying definitions of spinopelvic mobility including how different radiographic imaging techniques are used to define mobility. RESULTS The search term "spinopelvic mobility" returned a total of 72 articles. The frequency and context for the varying definitions of mobility were reported. 41 papers used standing and upright relaxed-seated radiographs without the use of extreme positioning, and 17 papers discussed the use of extreme positioning to define spinopelvic mobility. DISCUSSION Our review suggests that the definitions of spinopelvic mobility is not consistent in the majority of published literature. We suggest descriptions of spinopelvic mobility independently consider spinal motion, hip motion, and pelvic position, while recognizing and describing their interdependence.
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Affiliation(s)
- Daniel B. Buchalter
- From the Department of Orthopedic Surgery, NYU Langone Health, New York, NY (Dr. Buchalter, Ms. Gall, Dr. Buckland, Dr. Schwarzkopf, Dr. Meftah, and Dr. Hepinstall); and the Melbourne Orthopaedic Group, Spine and Scoliosis Research Associates, Melbourne, Australia (Dr. Buckland)
| | - Ashley M. Gall
- From the Department of Orthopedic Surgery, NYU Langone Health, New York, NY (Dr. Buchalter, Ms. Gall, Dr. Buckland, Dr. Schwarzkopf, Dr. Meftah, and Dr. Hepinstall); and the Melbourne Orthopaedic Group, Spine and Scoliosis Research Associates, Melbourne, Australia (Dr. Buckland)
| | - Aaron J. Buckland
- From the Department of Orthopedic Surgery, NYU Langone Health, New York, NY (Dr. Buchalter, Ms. Gall, Dr. Buckland, Dr. Schwarzkopf, Dr. Meftah, and Dr. Hepinstall); and the Melbourne Orthopaedic Group, Spine and Scoliosis Research Associates, Melbourne, Australia (Dr. Buckland)
| | - Ran Schwarzkopf
- From the Department of Orthopedic Surgery, NYU Langone Health, New York, NY (Dr. Buchalter, Ms. Gall, Dr. Buckland, Dr. Schwarzkopf, Dr. Meftah, and Dr. Hepinstall); and the Melbourne Orthopaedic Group, Spine and Scoliosis Research Associates, Melbourne, Australia (Dr. Buckland)
| | - Morteza Meftah
- From the Department of Orthopedic Surgery, NYU Langone Health, New York, NY (Dr. Buchalter, Ms. Gall, Dr. Buckland, Dr. Schwarzkopf, Dr. Meftah, and Dr. Hepinstall); and the Melbourne Orthopaedic Group, Spine and Scoliosis Research Associates, Melbourne, Australia (Dr. Buckland)
| | - Matthew S. Hepinstall
- From the Department of Orthopedic Surgery, NYU Langone Health, New York, NY (Dr. Buchalter, Ms. Gall, Dr. Buckland, Dr. Schwarzkopf, Dr. Meftah, and Dr. Hepinstall); and the Melbourne Orthopaedic Group, Spine and Scoliosis Research Associates, Melbourne, Australia (Dr. Buckland)
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30
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Harrer S, Magnuson JA, Toci GR, Star AM, Saxena A. Bibliometric Analysis of Spinopelvic Alignment in Total Hip Arthroplasty. J Am Acad Orthop Surg Glob Res Rev 2023; 7:01979360-202306000-00010. [PMID: 37327472 PMCID: PMC10278694 DOI: 10.5435/jaaosglobal-d-22-00182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 03/05/2023] [Accepted: 03/29/2023] [Indexed: 06/18/2023]
Abstract
INTRODUCTION Postoperative dislocation of unclear etiology remains a concern after total hip arthroplasty (THA). Interest is growing in the importance of spinopelvic alignment on stability in THA. The purpose of this study was to analyze publication trends, areas of interest, and future research direction of spinopelvic alignment in THA. METHODS Articles on the topic of spinopelvic alignment in THA published between 1990 and 2022 were obtained through Web of Science Core Collection of Clarivate Analytics (WSCCA). Results were screened by title, abstract, and full text. The inclusion criterion was English-language peer-reviewed journal publications on the clinical topic of spinopelvic alignment in THA. Bibliometric software was used to characterize publication trends. RESULTS We screened 1,211 articles, yielding 132 meeting the inclusion criterion. From 1990 to 2022, published articles have steadily increased, peaking in 2021. Countries that have been the most productive in contributions to research are those in which THA is the most prevalent. Our analysis of keyword frequency showed increasing interest in "pelvic tilt," "anteversion," and "acetabular component" position. CONCLUSION Our study identified that increasing attention is being given to spinopelvic mobility and PT in the setting of THA. The United States and France produced the most studies related to spinopelvic alignment.
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Affiliation(s)
- Samantha Harrer
- From the Rothman Orthopaedic Institute at Thomas Jefferson University, (Harrer, Dr. Magnuson, Toci, Dr. Star, Dr. Saxena), Philadelphia, PA (Harrer, Dr. Magnuson, Toci, Dr. Star, and Dr. Saxena) and the Sidney Kimmel College of Medicine at Thomas Jefferson University, Philadelphia, PA (Harrer)
| | - Justin A. Magnuson
- From the Rothman Orthopaedic Institute at Thomas Jefferson University, (Harrer, Dr. Magnuson, Toci, Dr. Star, Dr. Saxena), Philadelphia, PA (Harrer, Dr. Magnuson, Toci, Dr. Star, and Dr. Saxena) and the Sidney Kimmel College of Medicine at Thomas Jefferson University, Philadelphia, PA (Harrer)
| | - Gregory R. Toci
- From the Rothman Orthopaedic Institute at Thomas Jefferson University, (Harrer, Dr. Magnuson, Toci, Dr. Star, Dr. Saxena), Philadelphia, PA (Harrer, Dr. Magnuson, Toci, Dr. Star, and Dr. Saxena) and the Sidney Kimmel College of Medicine at Thomas Jefferson University, Philadelphia, PA (Harrer)
| | - Andrew M. Star
- From the Rothman Orthopaedic Institute at Thomas Jefferson University, (Harrer, Dr. Magnuson, Toci, Dr. Star, Dr. Saxena), Philadelphia, PA (Harrer, Dr. Magnuson, Toci, Dr. Star, and Dr. Saxena) and the Sidney Kimmel College of Medicine at Thomas Jefferson University, Philadelphia, PA (Harrer)
| | - Arjun Saxena
- From the Rothman Orthopaedic Institute at Thomas Jefferson University, (Harrer, Dr. Magnuson, Toci, Dr. Star, Dr. Saxena), Philadelphia, PA (Harrer, Dr. Magnuson, Toci, Dr. Star, and Dr. Saxena) and the Sidney Kimmel College of Medicine at Thomas Jefferson University, Philadelphia, PA (Harrer)
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Sirignano M, Nessler JM, Rhea EB, Ong KL, Watson H, Yakkanti MR, Malkani AL. "Incidence of Instability Following Primary Total Hip Arthroplasty Continues to Decline in the Medicare Population". J Arthroplasty 2023:S0883-5403(23)00391-1. [PMID: 37088227 DOI: 10.1016/j.arth.2023.04.035] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 04/12/2023] [Accepted: 04/13/2023] [Indexed: 04/25/2023] Open
Abstract
BACKGROUND Instability has been the primary cause of failure following primary total hip arthroplasty (THA) leading to revision hip surgery. The purpose of this study was to determine if instability rates have further declined following advances in primary THA including dual mobility articulations, direct anterior approaches, advanced technologies, and improved knowledge of the hip-spine relationships. METHODS Using the 5% Medicare Part B claims data from 1999 to 2019, we identified 81,573 patients who underwent primary THA for osteoarthritis. Patients who experienced instability at 3 months, 6 months, 1 year, and 2 years were identified. Multivariate cox regression analyses evaluated the effect of patient and procedure characteristics on the risk for instability. RESULTS Instability at 1 year following primary THA declined from approximately 4% in 2000 to 2.3% in 2010 and 1.6% in 2018. The leading cause of revision surgery was infection (18.6%), followed by peri-prosthetic fracture (14%), mechanical loosening (11.5%), and instability (9.4%). High risk groups for instability continue to include increased age, higher Charlson index, obesity, lumbar spine pathology, and neurocognitive disorders. CONCLUSION Instability is no longer the leading etiology of failure following primary THA with a decline of approximately 40% over the past decade. Infection, periprosthetic fracture, mechanical loosening, and then instability are now the leading causes of failure. Multiple factors may play a role in the decline of instability including increased use of dual mobility articulations, direct anterior approaches, improved knowledge of the hip-spine relationships, and use of advanced technologies.
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Affiliation(s)
- Michael Sirignano
- University of Louisville, Dept. of Orthopaedic Surgery, 550 South Jackson Street, Louisville, KY 40202, USA
| | - Joseph M Nessler
- University of Louisville, Dept. of Orthopaedic Surgery, 550 South Jackson Street, Louisville, KY 40202, USA
| | - Evan B Rhea
- University of Louisville, Dept. of Orthopaedic Surgery, 550 South Jackson Street, Louisville, KY 40202, USA
| | - Kevin L Ong
- Exponent Inc., 3440 Market Street, Suite 600, Philadelphia, PA 19104, USA
| | - Heather Watson
- Exponent Inc., 15375 SE 30th Place, Suite 250, Bellevue, WA 98007, USA
| | | | - Arthur L Malkani
- University of Louisville, Dept. of Orthopedic Surgery, Adult Reconstruction Program, 550 South Jackson Street, Louisville, KY 40202, USA.
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Tanabe H, Homma Y, Yanagisawa N, Watari T, Ishii S, Shirogane Y, Baba T, Kaneko K, Ishijima M. Validation of a preoperative formula to estimate postoperative pelvic sagittal alignment and mobility before performing total hip arthroplasty for patients with hip osteoarthritis. ARTHROPLASTY 2023; 5:13. [PMID: 37020254 PMCID: PMC10077599 DOI: 10.1186/s42836-023-00171-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 02/01/2023] [Indexed: 04/07/2023] Open
Abstract
BACKGROUND Although it is important to consider pelvic alignment and mobility in the standing and sitting positions before THA, it is not known how to preoperatively predict individual postoperative pelvic alignment and mobility. The purpose of this study was to investigate the pelvic alignment and mobility before and after THA, and to develop a predictive formula using preoperative factors to calculate postoperative sagittal alignment and mobility. METHODS One hundred seventy patients were assessed. The 170 patients were randomly divided into a prediction model analysis group (n = 85) and an external validation group (n = 85). In the prediction model analysis group, preoperative spinopelvic parameters were used to develop the predictive formulas to predict the postoperative sacral slope (SS) in standing and sitting positions and ΔSS. These were applied to the external validation group and assessed. RESULTS R2 in multiple linear regression models for postoperative SS in standing, SS in sitting and ΔSS were 0.810, 0.672, and 0.423, respectively. The values of predicted and postoperative parameters were very close with no significant difference: SS in standing (33.87 vs. 34.23, P = 0.834), SS in sitting (18.86 vs. 19.51, P = 0.228), and ΔSS (15.38 vs. 14.72, P = 0.619). CONCLUSION The present study showed that the pelvic alignment and mobility after THA can be predicted using preoperative factors. Although a model with higher accuracy is needed, it is important to use a predictive formula to estimate the postoperative condition before performing THA.
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Affiliation(s)
- Hiroki Tanabe
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
- Department of Orthopaedic, Faculty of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Yasuhiro Homma
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
- Department of Orthopaedic, Faculty of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
| | - Naotake Yanagisawa
- Medical Technology Innovation Center, Juntendo University, Tokyo, 113-0033, Japan
| | - Taiji Watari
- Department of Orthopaedic, Faculty of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Seiya Ishii
- Department of Orthopaedic, Faculty of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Yuichi Shirogane
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
- Department of Orthopaedic, Faculty of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Tomonori Baba
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
- Department of Orthopaedic, Faculty of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Kazuo Kaneko
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
- Department of Orthopaedic, Faculty of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Muneaki Ishijima
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
- Department of Orthopaedic, Faculty of Medicine, Juntendo University, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
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Sharma AK, Grammatopoulos G, Pierrepont JW, Madurawe CS, Innmann MM, Vigdorchik JM, Shimmin AJ. Sacral Slope Change From Standing to Relaxed-Seated Grossly Overpredicts the Presence of a Stiff Spine. J Arthroplasty 2023; 38:713-718.e1. [PMID: 35588904 DOI: 10.1016/j.arth.2022.05.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 04/12/2022] [Accepted: 05/10/2022] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Several authors propose that a change in sacral slope of ≤10° between the standing and relaxed-seated positions (ΔSSstanding→relaxed-seated) identifies a patient with a stiff lumbar spine and has suggested the use of dual-mobility bearings for such patients undergoing a total hip arthroplasty (THA). The aim of this study was to assess how accurately ΔSSstanding→relaxed-seated can identify patients with a stiff spine. METHODS A prospective, multicentre, consecutive cohort series of 312 patients had standing, relaxed-seated, and flexed-seated lateral radiographs prior to THA. ΔSSstanding→relaxed-seated was determined by the change in sacral slope between the standing and relaxed-seated positions. Lumbar flexion (LF) was defined as the difference in lumbar lordotic angle between standing and flexed-seated. LF ≤20° was considered a stiff spine. The predictive value of ΔSSstanding→relaxed-seated for characterizing a stiff spine was assessed. RESULTS A weak correlation between ΔSSstanding→relaxed-seated and LF was identified (r2 = 0.13). Eighty six patients (28%) had ΔSSstanding→relaxed-seated ≤10° and 19 patients (6%) had a stiff spine. Of the 86 patients with ΔSSstanding→relaxed-seated ≤10°, 13 had a stiff spine. The positive predictive value of ΔSSstanding→relaxed-seated ≤10° for identifying a stiff spine was 15%. CONCLUSION In this cohort, ΔSSstanding→relaxed-seated ≤10° was not correlated with a stiff spine. Using this simplified approach could lead to a 7-fold overprediction of patients with a stiff lumbar spine and abnormal spinopelvic mobility, unnecessary use of dual-mobility bearings, and incorrect component alignment targets. Referring to patients with ΔSSstanding→relaxed-seated ≤10° as being stiff is misleading. The flexed-seated position should be used to effectively assess a patient's spine mobility prior to THA.
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Affiliation(s)
- Abhinav K Sharma
- Department of Orthopaedic Surgery, University of California, Irvine, School of Medicine, Orange, California
| | | | | | | | - Moritz M Innmann
- Division of Orthopaedic Surgery, The Ottawa Hospital, Ottawa, Ontario, Canada; Division of Orthopaedics and Trauma Surgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Jonathan M Vigdorchik
- Department of Orthopedic Surgery, Hospital for Special Surgery, Adult Reconstruction and Joint Replacement, New York, New York
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High Prevalence of Spinopelvic Risk Factors in Patients With Post-Operative Hip Dislocations. J Arthroplasty 2023; 38:706-712. [PMID: 35598762 DOI: 10.1016/j.arth.2022.05.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 04/29/2022] [Accepted: 05/08/2022] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Excessive standing posterior pelvic tilt (PT), lumbar spine stiffness, low pelvic incidence (PI), and severe sagittal spinal deformity (SSD) have been linked to increased dislocation rates. We aimed to determine the prevalence of these 4 parameters in a cohort of unstable total hip arthroplasty (THA) patients and compare these to a large representative control population of primary THA patients. METHODS Forty-eight patients with instability following primary THA were compared to a control cohort of 9414 THA patients. Lateral X-rays in standing and flexed-seated positions were used to assess PT and lumbar lordosis (LL). Computed tomography scans were used to measure PI and acetabular cup orientation. Thresholds for "at risk" spinopelvic parameters were standing posterior PT ≤ -15°, lumbar flexion (LLstand-LLseated) ≤ 20°, PI ≤ 41°, PI ≥ 70°, and SSD (PI-LLstand mismatch ≥ 20°). RESULTS There were significant differences in mean spinopelvic parameters between the dislocating and control cohorts (P < .001). There were no differences in mean PI (58° versus 56°, respectively, P = .29) or prevalence of high and low PI between groups. 67% of the dislocating patients had one or more significant risk factors, compared to only 11% of the control. A total of 71% of the dislocating patients had cup orientations within the traditional safe zone. CONCLUSION Excessive standing posterior PT, low lumbar flexion, and a severe SSD are more prevalent in unstable THAs. Pre-op screening for these parameters combined with appropriate planning and implant selection may help identify at risk patients and reduce the prevalence of dislocation.
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Fontalis A, Putzeys P, Plastow R, Giebaly DE, Kayani B, Glod F, Haddad FS. Functional Component Positioning in Total Hip Arthroplasty and the Role of Robotic-Arm Assistance in Addressing Spinopelvic Pathology. Orthop Clin North Am 2023; 54:121-140. [PMID: 36894286 DOI: 10.1016/j.ocl.2022.11.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
Abstract
Hip, spine, and pelvis function as a unified kinetic chain. Any spinal pathology, results in compensatory changes in the other components to accommodate for the reduced spinopelvic motion. The complex relationship between spinopelvic mobility and component positioning in total hip arthroplasty presents a challenge in achieving functional implant positioning. Patients with spinal pathology, especially those with stiff spines and little change in sacral slope, are at high instability risk. In this challenging subgroup, robotic-arm assistance enables the execution of a patient specific plan, avoiding impingement and maximizing range of motion; especially utilizing virtual range of motion to dynamically assess impingement.
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Affiliation(s)
- Andreas Fontalis
- Department of Trauma and Orthopaedic Surgery, University College Hospital, 235 Euston Road, London NW1 2BU, UK; Division of Surgery and Interventional Science, University College London, Gower Street, London WC1E 6BT, UK.
| | - Pierre Putzeys
- Hôpitaux Robert Schuman, 9 Rue Edward Steichen, Luxembourg-City 2540, Luxembourg
| | - Ricci Plastow
- Department of Trauma and Orthopaedic Surgery, University College Hospital, 235 Euston Road, London NW1 2BU, UK
| | - Dia Eldean Giebaly
- Department of Trauma and Orthopaedic Surgery, University College Hospital, 235 Euston Road, London NW1 2BU, UK; Division of Surgery and Interventional Science, University College London, Gower Street, London WC1E 6BT, UK
| | - Babar Kayani
- Department of Trauma and Orthopaedic Surgery, University College Hospital, 235 Euston Road, London NW1 2BU, UK
| | - Fabrice Glod
- Hôpitaux Robert Schuman, 9 Rue Edward Steichen, Luxembourg-City 2540, Luxembourg
| | - Fares S Haddad
- Department of Trauma and Orthopaedic Surgery, University College Hospital, 235 Euston Road, London NW1 2BU, UK; Division of Surgery and Interventional Science, University College London, Gower Street, London WC1E 6BT, UK
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Roesler K, Garvin KL. Failure of a Highly Cross-Linked Polyethylene Liner After Spine Fusion. J Am Acad Orthop Surg Glob Res Rev 2023; 7:01979360-202303000-00010. [PMID: 36940212 PMCID: PMC10027029 DOI: 10.5435/jaaosglobal-d-22-00150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 01/27/2023] [Indexed: 03/21/2023]
Abstract
A 73-year-old woman, 11 years after total hip arthroplasty and 2 years after a multilevel lumbar spine fusion, presented with a 2-month history of anterior hip and gluteal pain. She was diagnosed with an acetabular liner fracture that occurred through the high wall, likely related to repetitive impingement on the neck of the femoral implant, as notable burnishing was observed on the explanted femoral head. The acetabulum was successfully revised to a dual-mobility articulation. Spinal fusion after total hip arthroplasty can alter the acetabular implant position and was seen in our patient whose previously functional high-walled liner failed. Surgeons may consider alternative techniques, including a change in acetabular implant's anteversion to mitigate the need for a high-walled liner or the use of a dual-mobility bearing.
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Affiliation(s)
- Kimberly Roesler
- From the Creighton University School of Medicine, Omaha, NE (Dr. Roesler), and the Department of Orthopaedic Surgery, University of Nebraska Medical Center, Omaha, NE (Dr. Garvin)
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Haffer H, Hu Z, Wang Z, Müllner M, Hardt S, Pumberger M. Association of age and spinopelvic function in patients receiving a total hip arthroplasty. Sci Rep 2023; 13:2589. [PMID: 36788270 PMCID: PMC9929091 DOI: 10.1038/s41598-023-29545-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 02/06/2023] [Indexed: 02/16/2023] Open
Abstract
Restricted spinopelvic mobility received attention as a contributing factor for total hip arthroplasty (THA) instability. However, it is still unknown, how the spinopelvic function is influenced by age. In identifying the patients at highest risk for altered spinopelvic mechanics the study aimed to determine the association of age on the individual segments of the spinopelvic complex and global spinal sagittal alignment in patients undergoing THA. 197 patients were included in the prospective observational study conducting biplanar stereoradiography (EOS) in standing and sitting position pre-and postoperatively. Two independent investigators assessed C7-sagittal vertical axis (C7-SVA), cervical lordosis (CL), thoracic kyphosis (TK), lumbar lordosis (LL), pelvic incidence (PI), sacral slope (SS), anterior plane pelvic tilt (APPT), and pelvic femoral angle (PFA). Key segments of the spinopelvic complex are defined as lumbar flexibility (∆ LL = LLstanding - LLsitting), pelvic mobility (∆ SS = SSstanding - SSsitting) and hip motion (∆ PFA = PFAstanding - PFAsitting). Pelvic mobility was further defined based on ∆ SS = SSstanding - SSsitting as stiff (∆ SS < 10°), normal (∆ SS ≥ 10°-30°) and hypermobile (∆ SS > 30°). The patient collective was classified into three groups: (1) < 60 years (n = 56), (2) ≥ 60-79 years (n = 112) and (3) ≥ 80 years (n = 29). Lumbar flexibility (∆ LL) was decreased with increasing age between all groups (36.1° vs. 23.1° vs. 17.2°/p1+2 < 0.000, p2+3 = 0.020, p1+3 < 0.000) postoperatively. Pelvic mobility (∆ SS) was decreased in the groups 2 and 3 compared to group 1 (21.0° and 17.9° vs. 27.8°/p1+2 < 0.000, p2+3 = 0.371, p1+3 = 0.001). Pelvic retroversion in standing position (APPT) was higher in group 2 and 3 compared to group 1 (1.9° and - 0.5° vs 6.9°/p1+2 < 0.000, p2+3 = 0.330, p1+3 < 0.000). Global sagittal spinal balance (C7-SVA) showed more imbalance in groups 2 and 3 compared to group 1 (60.4 mm and 71.2 mm vs. 34.5 mm/p1+2 < 0.000, p2+3 = 0.376, p1+3 < 0.000) postoperatively. The preoperative proportion of patients with stiff pelvic mobility in group 1 was distinctly lower than in group 3 (23.2% vs. 35.7%) and declined in group 1 to 1.8% compared to 20.7% in group 3 after THA. Changes after THA were reported for groups 1 and 2 representing spinopelvic complex key parameter lumbar flexibility (∆ LL), pelvic mobility (∆ SS) and hip motion (∆ PFA), but not for group 3. This is the first study to present age-adjusted normative values for spinopelvic mobility. The subgroups with increased age were identified as risk cohort for altered spinopelvic mechanics and enhanced sagittal spinal imbalance and limited capacity for improvement of mobility after THA. This valuable information serves to focus in the preoperative screening on the THA candidates with the highest risk for abnormal spinopelvic function.
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Affiliation(s)
- Henryk Haffer
- Center for Musculoskeletal Surgery, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany.
| | - Zhouyang Hu
- Center for Musculoskeletal Surgery, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Zhen Wang
- Center for Musculoskeletal Surgery, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Maximilian Müllner
- Center for Musculoskeletal Surgery, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Sebastian Hardt
- Center for Musculoskeletal Surgery, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Matthias Pumberger
- Center for Musculoskeletal Surgery, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
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Verhaegen JC, Alves Batista N, Horton I, Rakhra K, Beaulé PE, Michielsen J, Stratton A, Grammatopoulos G. Prevalence of Lumbosacral Transitional Vertebral Anomalies Among Healthy Volunteers and Patients with Hip Pathology: Association with Spinopelvic Characteristics. JB JS Open Access 2023; 8:e22.00095. [PMID: 37908325 PMCID: PMC10614646 DOI: 10.2106/jbjs.oa.22.00095] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/02/2023] Open
Abstract
A lumbosacral transitional vertebra (LSTV) has been reported to be prevalent among patients with hip dysplasia. The aims of this study were to determine the (1) prevalence of an LSTV in young patients presenting with hip pain and a group of asymptomatic volunteers, (2) effect of an LSTV on spinopelvic characteristics, and (3) presence of low back pain among patients with an LSTV. Methods This cross-sectional study included 102 patients with hip pathology and 51 asymptomatic volunteers (mean age, 33.9 ± 7.3 years; mean body mass index, 26.0 ± 5.0 kg/m2; 57.5% female). Participants underwent radiographic assessment of the lumbar spine and pelvis in standing and deep-seated positions. LSTV occurrence was classified according to the Castellvi system. Spinopelvic characteristics included lumbar lordosis (including segmental lumbar angles), pelvic tilt, and hip flexion (pelvic-femoral angle). Differences between standing and deep-seated values were calculated. Low back pain was assessed using the Oswestry Disability Index. Results The prevalence of LSTV type ≥II was 8.5%, with no difference between patients and volunteers (p = 0.386). Individuals with an LSTV had a greater standing L1-L5 angle (mean, 51.6° ± 11.7° versus 38.9° ± 9.3°; p < 0.001). The overall spinal flexion (change in L1-S1 angle between the standing and deep-seated positions) in individuals with an LSTV was similar to that in individuals without an LSTV; restricted L5-S1 mobility was compensated for at L1-L2 (10.2° ± 5.8° in those with versus 8.4° ± 4.1° in those without an LSTV; p = 0.070). No significant difference in the presence of low back pain was found (p = 0.250). Conclusions An LSTV was found in 8.5% of young adults, with no difference between patients with hip pathology and controls. Individuals with an LSTV have greater standing lumbar lordosis, with altered mechanics at the cephalad adjacent level, which may predispose these individuals to degenerative changes at this level. Level of Evidence Prognostic Level II. See Instructions for Authors for a complete description of levels of evidence.
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Affiliation(s)
- Jeroen C.F. Verhaegen
- Department of Orthopaedic Surgery, The Ottawa Hospital, Ottawa, Ontario, Canada
- University Hospital Antwerp, Edegem, Belgium
| | - Nuno Alves Batista
- Department of Orthopaedic Surgery, The Ottawa Hospital, Ottawa, Ontario, Canada
| | - Isabel Horton
- Department of Orthopaedic Surgery, The Ottawa Hospital, Ottawa, Ontario, Canada
| | - Kawan Rakhra
- Department of Radiology, The Ottawa Hospital, Ottawa, Ontario, Canada
| | - Paul E. Beaulé
- Department of Orthopaedic Surgery, The Ottawa Hospital, Ottawa, Ontario, Canada
| | | | - Alexandra Stratton
- Department of Orthopaedic Surgery, The Ottawa Hospital, Ottawa, Ontario, Canada
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Zhou S, Qiu W, Wang W, Li W, Xu F, Zou D, Sun Z, Li W. Impact of lumbar fusion on spinopelvic sagittal alignment from standing to sitting position: which factor is associated with postoperative functional limitations due to lumbar stiffness? EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2023; 32:345-352. [PMID: 36344800 DOI: 10.1007/s00586-022-07438-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 10/13/2022] [Accepted: 10/25/2022] [Indexed: 11/09/2022]
Abstract
PURPOSE To investigate the impact of lumbar fusion on spinopelvic sagittal alignment from standing to sitting position and the influencing factors of postoperative functional limitations due to lumbar stiffness. METHODS A total of 107 patients who undertook posterior lumbar interbody fusion were included. Patients were divided into two groups: Group A (lumbosacral fusion; n = 43) and Group B (floating fusion; n = 64). Spinopelvic parameters in standing and sitting position including pelvic incidence (PI), pelvic tilt (PT), sacral slope (SS), lumbar lordosis (LL), fusion segment lordosis (FSL), upper residual lordosis (URL), lower residual lordosis (LRL), thoracic kyphosis (TK), thoracolumbar kyphosis (TLK), sagittal vertical axis (SVA) and T1 pelvic angle (TPA) were measured before and after lumbar fusion. The Lumbar Stiffness Disability Index (LSDI) was used to assess functional limitations due to lumbar stiffness. RESULTS Accompanied by increased postoperative LSDI, the values of changes from standing to sitting (∆) were reduced in some parameters compared with the preoperative values. ∆PT and ∆SS significantly decreased in both two groups. In Group A, ∆LL significantly decreased with increased ∆URL. In Group B, ∆LL, ∆URL and ∆LRL showed no significant difference before and after surgery. Multiple linear regression analysis showed that age and ∆PT independently influenced the postoperative LSDI in Group A. CONCLUSION After lumbar fusion, changes of lumbopelvic sagittal parameters from standing to sitting would be restricted. Adjacent segment lordosis could partially compensate for this restriction. For patients with lumbosacral fusion, postoperative functional limitations due to lumbar stiffness were related to age and the postoperative ∆PT from standing to sitting.
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Affiliation(s)
- Siyu Zhou
- Department of Orthopaedics, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, China.,Engineering Research Center of Bone and Joint Precision Medicine, Beijing, China.,Beijing Key Laboratory of Spinal Disease Research, Beijing, China
| | - Weipeng Qiu
- Department of Orthopaedics, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, China.,Engineering Research Center of Bone and Joint Precision Medicine, Beijing, China.,Beijing Key Laboratory of Spinal Disease Research, Beijing, China
| | - Wei Wang
- Department of Orthopaedic, Tianjin Hospital, Tianjin, China
| | - Wei Li
- Department of Orthopaedics, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, China.,Engineering Research Center of Bone and Joint Precision Medicine, Beijing, China.,Beijing Key Laboratory of Spinal Disease Research, Beijing, China
| | - Fei Xu
- Department of Orthopaedics, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, China.,Engineering Research Center of Bone and Joint Precision Medicine, Beijing, China.,Beijing Key Laboratory of Spinal Disease Research, Beijing, China
| | - Da Zou
- Department of Orthopaedics, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, China.,Engineering Research Center of Bone and Joint Precision Medicine, Beijing, China.,Beijing Key Laboratory of Spinal Disease Research, Beijing, China
| | - Zhuoran Sun
- Department of Orthopaedics, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, China.,Engineering Research Center of Bone and Joint Precision Medicine, Beijing, China.,Beijing Key Laboratory of Spinal Disease Research, Beijing, China
| | - Weishi Li
- Department of Orthopaedics, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, China. .,Engineering Research Center of Bone and Joint Precision Medicine, Beijing, China. .,Beijing Key Laboratory of Spinal Disease Research, Beijing, China.
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The Impact of Hip Mobility on Lumbar and Pelvic Mobility before and after Total Hip Arthroplasty. J Clin Med 2022; 12:jcm12010331. [PMID: 36615131 PMCID: PMC9821212 DOI: 10.3390/jcm12010331] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/18/2022] [Accepted: 12/29/2022] [Indexed: 01/03/2023] Open
Abstract
Hip arthrosis and total hip arthroplasty (THA) can alter a patient's balance and spinopelvic mobility. In this study, we hypothesized that lumbar, pelvic, and hip mobility and their inter-relations are affected by THA and that their study could give an insight in our understanding of postoperative balance and mobility. A total of 165 patients with hip arthrosis and with an indication for THA were included in this single-center prospective cohort. Sagittal radiographs were acquired in four positions: free-standing, standing extension, relaxed-seating and flexed-seating preoperatively and at 6 and 12 months. Spinopelvic parameters were measured (pelvic tilt and incidence, sacral slope, lumbar lordosis, pelvic-femoral angle). Standing spinopelvic parameters did not significantly change postoperatively. However, the postural changes occurring between positions were significantly altered after THA. In particular, pelvic and lumbar mobility was significantly reduced postoperatively, while hip mobility was increased. Correlations were observed between the changes in lumbar, pelvic and hip mobility before and after THA. This study confirmed that there is a relationship between lumbar, pelvic and hip mobility in osteoarthritis, and that this relationship is modified by the postoperative compensation mechanisms deployed by the patient in dynamic postures. Hence, surgeons should consider these relationships when planning surgery, in order to obtain a physiological pelvic tilt postoperatively and to account for the potential increased risk of impingement and dislocation with hip hypermobility.
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Cho E, Hisatome T, Oda S, Fujimaki H, Nakanishi K. Accuracy of acetabular cup placement during anterolateral supine total hip arthroplasty using intraoperative fluoroscopy: a retrospective study. J Orthop Surg Res 2022; 17:523. [PMID: 36471354 PMCID: PMC9720972 DOI: 10.1186/s13018-022-03422-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Accepted: 11/25/2022] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND In our institution, total hip arthroplasty (THA) is performed using the anterolateral supine (ALS) approach with intraoperative fluoroscopy. This study aimed to investigate and review the accuracy of acetabular cup placement in ALS-THA using intraoperative fluoroscopy. METHODS A total of 142 patients with 154 joints (mean age 64.3 years, 30 males and 112 females) underwent ALS-THA with intraoperative fluoroscopy at the same institution. The target angle of the cup position was set at 40° for radiographic inclination (RI) and 5°-25° for radiographic anteversion (RA) based on the functional pelvic plane according to the pelvic motion during individual postural changes. The cup position angle was measured using postoperative computed tomography, and the error in the target angle was investigated. RESULTS The target angle of RI was 40°, and the postoperative RI was 39.3° ± 4.3°. The target angle of the RA was 17° ± 2.6°, and the postoperative RA was 20.6° ± 3.7°. The absolute values of the error from the target angle were 3.6° ± 2.5° for RI and 4.2° ± 3.3° for RA. For RI and RA, 67.5% (104/154 joints) were within ± 5° of the target and 96.1% (148/154 joints) were within ± 10°. CONCLUSIONS The accuracy of cup positioning in ALS-THA using intraoperative fluoroscopy was good and appeared comparable to that of various navigation systems.
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Affiliation(s)
- Eiji Cho
- grid.495549.00000 0004 1764 8786Department of Orthopaedic Surgery, Nihon University Itabashi Hospital, Tokyo, Japan
| | - Takashi Hisatome
- grid.412178.90000 0004 0620 9665Department of Orthopaedic Surgery, Nihon University Hospital, Tokyo, Japan
| | - Shuhei Oda
- grid.412178.90000 0004 0620 9665Department of Orthopaedic Surgery, Nihon University Hospital, Tokyo, Japan
| | - Hirohisa Fujimaki
- grid.412178.90000 0004 0620 9665Department of Orthopaedic Surgery, Nihon University Hospital, Tokyo, Japan
| | - Kazuyoshi Nakanishi
- grid.495549.00000 0004 1764 8786Department of Orthopaedic Surgery, Nihon University Itabashi Hospital, Tokyo, Japan
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Direct anterior approach in total hip arthroplasty: more indications and advantages than we found. ARTHROPLASTY 2022; 4:29. [PMID: 35799291 PMCID: PMC9264642 DOI: 10.1186/s42836-022-00130-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 05/25/2022] [Indexed: 11/10/2022] Open
Abstract
Mounting attention has been oriented to the direct anterior approach (DAA) in total hip arthroplasty (THA) because of alleged advantages in terms of tissue-sparing and minimal invasiveness, as well as fast recovery after surgery in the past decades. Doubt has also been raised by critics regarding learning curve, indications, technical feasibility, intraoperative risks and complications, and unconfirmed long-term consequences of the approach. The controversies were elaborately reviewed and discussed in a recent publication in Arthroplasty by Realyvasquez et al. from the perspective of American surgeons. This inclusive review covered the current status, technical issues, outcome evaluation, and developmental concerns of DAA in modern THA. As one of the pioneers of DAA in hip surgery communities in China, Prof. Y. Z., the corresponding author of the paper, has his own understanding and manipulation of DAA on the basis of thousands of DAA procedures he has performed. The purpose of this article was to respond to the pivotal issues discussed in the article by Realyvasquez et al., and to present our own view of points about the indications/contraindications and advantages as different from existing ideas. In particular, we proposed a Xinqiao Predictive Algorithm to quantitatively assess the indications for and feasibility of DAA for the first time. The algorithm was constructed on multiple factors derived from Chinese patients. Our study concluded that the potential advantages of DAA could be achieved by personalizing the pelvic functional position and placing the component into the real safe zone, by means of adapting to the spaciotemporal change of the hip-spine coordination.
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Bullock EKC, Brown MJ, Clark G, Plant JGA, Blakeney WG. Robotics in Total Hip Arthroplasty: Current Concepts. J Clin Med 2022; 11:6674. [PMID: 36431151 PMCID: PMC9695933 DOI: 10.3390/jcm11226674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 10/25/2022] [Accepted: 11/05/2022] [Indexed: 11/13/2022] Open
Abstract
This current concepts article reviews the literature pertaining to the use of robot-assisted systems in total hip arthroplasty (THA). The bulk of the literature is regarding the MAKO (currently the most used system worldwide) and the historic ROBODOC robotic systems. There is a paucity of literature available on other systems, with several still in pilot-phase development. Whilst the evidence shows improved radiological outcomes with robotic THA, functional outcomes are equivocal between conventional and robotic techniques. Acceptance of robotic THA worldwide is limited by its accessibility including cost, and by already exceptional results with the conventional technique. It is, however, a rapidly developing area of orthopaedic surgery. This article discusses the history of robotics in THA, current surgical techniques, functional and radiological outcomes, and ongoing avenues for development.
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Affiliation(s)
- Emily K. C. Bullock
- Department of Orthopaedic Surgery, Royal Perth Hospital, Wellington St., Perth, WA 6000, Australia
| | - Michael J. Brown
- Department of Orthopaedic Surgery, Royal Perth Hospital, Wellington St., Perth, WA 6000, Australia
| | - Gavin Clark
- Department of Orthopaedic Surgery, St John of God Subiaco Hospital, 12 Salvado Road, Subiaco, WA 6008, Australia
| | - James G. A. Plant
- Department of Orthopaedic Surgery, Royal Perth Hospital, Wellington St., Perth, WA 6000, Australia
- Department of Orthopaedic Surgery, St John of God Subiaco Hospital, 12 Salvado Road, Subiaco, WA 6008, Australia
| | - William G. Blakeney
- Department of Orthopaedic Surgery, Royal Perth Hospital, Wellington St., Perth, WA 6000, Australia
- Department of Orthopaedic Surgery, St John of God Subiaco Hospital, 12 Salvado Road, Subiaco, WA 6008, Australia
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Robotic-Arm-Assisted Total Hip Arthroplasty: A Review of the Workflow, Outcomes and Its Role in Addressing the Challenge of Spinopelvic Imbalance. Medicina (B Aires) 2022; 58:medicina58111616. [DOI: 10.3390/medicina58111616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 10/27/2022] [Accepted: 11/06/2022] [Indexed: 11/11/2022] Open
Abstract
Robotic-arm-assisted total hip arthroplasty (RoTHA) offers the opportunity to improve the implant positioning and restoration of native hip mechanics. The concept of individualised, functional implant positioning and how it relates to spinopelvic imbalance is an important yet rather novel consideration in THA. There is mounting evidence that a significant percentage of dislocations occur within the perceived “safe zones”; hence, in the challenging subset of patients with a stiff spinopelvic construct, it is imperative to employ individualised component positioning based on the patients’ phenotype. Restoring the native centre of rotation, preserving offset, achieving the desired combined anteversion and avoiding leg length inequality are all very important surgeon-controlled variables that have been shown to be associated with postoperative outcomes. The latest version of the software has a feature of virtual range of motion (VROM), which preoperatively identifies potential dynamic causes of impingement that can cause instability. This review presents the workflow of RoTHA, especially focusing on pragmatic solutions to tackle the challenge of spinopelvic imbalance. Furthermore, it presents an overview of the existing evidence concerning RoTHA and touches upon future direction.
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The Functional Mechanics of the Acetabular Component in Total Hip Arthroplasty. J Arthroplasty 2022; 37:2199-2207.e1. [PMID: 35643259 DOI: 10.1016/j.arth.2022.05.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 05/06/2022] [Accepted: 05/08/2022] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Total hip arthroplasty functional safe zones match postural hip changes to dynamic positioning of the acetabular component. We studied integrating the Anteinclination (AI) cup angle into the spinopelvic environment, defining normative values for all parameters and calculating adjustments to AI for each degree of altered standing pelvic position and postural mobility from these values. A sagittal geometric model was employed to determine these values using established spinopelvic parameter angles. METHODS Theoretical normative Pelvic Incidence (PI) specific values were calculated using a triangular construct employing a linear equation describing the functional relationship between the pelvic parameters at a mobility producing an isosceles solution for normative acetabular angles. Individual optimal AI cup values for altered Sacral Slope (SS)/pelvic tilt (sPT) and mobility (dSS) were calculated using specific ratios of angular change between parameters correcting from these normative values. RESULTS A PI:SS:sPT ratio of angular change of 3:2:1 at dSS = 25° mobility creates an isosceles condition solving for PI specific theoretical normative values for all construct parameters. Individualized tilt correction applies to each posture a +0.25° AI alteration for each +1° sPT increase from this architectural value. Mobility correction applies a +0.5° standing AI and -0.5° sitting AI alteration for each -1° dSS < 25°, the opposite for each +1° dSS > 25°. The Sacroacetabular angle/Pelvic acetabular angle (SAA/PAA) index describes the underlying spinopelvic environment the cup functions within. CONCLUSION This model quantitatively integrates an implanted acetabular component into the host spinopelvic environment. Theoretical normative and individual optimal cup orientations are passively determined by these conditions of standing pelvic position and mobility.
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Schmidt-Braekling T, Coyle MJ, Dobransky J, Kreviazuk C, Gofton W, Phan P, Beaulé PE, Grammatopoulos G. Spinal pathology and outcome post-THA: does segment of arthrodesis matter? Arch Orthop Trauma Surg 2022; 142:3477-3487. [PMID: 34677633 DOI: 10.1007/s00402-021-04220-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Accepted: 10/10/2021] [Indexed: 11/30/2022]
Abstract
INTRODUCTION The presence of lumbar spine arthrodesis (SA) is associated with abnormal spinopelvic characteristics and inferior outcome post total hip arthroplasty (THA). However, whether patients with upper segment SA are also at increased risk of complications is unknown. This study aims to (1) determine if upper segment SA is associated with inferior THA outcomes; (2) assess spino-pelvic characteristics; and (3) test whether static or dynamic spinopelvic characteristics correlate with outcome post-THA. MATERIALS AND METHODS In this retrospective, case-matched, cohort study from a tertiary referral centre, 40 patients (59 hips) that had undergone both THA and any level of spinal arthrodesis (49 THA-Lumb and 10 THA-Cerv) were compared with 41 patients (59 hips) who had THA-only without known spinal pathology. Spino-pelvic characteristics [including severity of Degenerative-Disc-Disease (DDD); spinal balance and stiffness] and outcome, including patient reported outcome measures (PROMs), at minimum of 1-year post-THA were assessed. RESULTS THA-Lumb and THA-Cerv groups had greater number of complications and inferior hip and spinal PROMs compared to THA-Only (p < 0.001). Similar spinopelvic characteristics were seen between the THA-Cerv and THA-Lumb, which were significantly different to the THA-only group. The presence of DDD and unbalanced or stiff spine was associated with increased dislocation and inferior PROMs in the whole cohort. CONCLUSIONS THA in the presence of SA, regardless of level, is associated with inferior outcomes and an increased risk for dislocation. The presence of a SA is associated with increased risk of adverse spinopelvic characteristics. Such characteristics were strongly associated with increased dislocation-risk and inferior PROMs. It is likely that these adverse characteristics are the most important adverse predictor, rather than segment of SA per se.
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Affiliation(s)
- Tom Schmidt-Braekling
- Division of Orthopaedic Surgery, The Ottawa Hospital-General Campus, 501 Smyth Road, CCW 1638, Ottawa, ON, K1H 8L6, Canada.,Department of General Orthopedics and Tumor Orthopedics, Muenster University Hospital, Muenster, Germany
| | - Matthew J Coyle
- Division of Orthopaedic Surgery, The Ottawa Hospital-General Campus, 501 Smyth Road, CCW 1638, Ottawa, ON, K1H 8L6, Canada
| | - Johanna Dobransky
- Division of Orthopaedic Surgery, The Ottawa Hospital-General Campus, 501 Smyth Road, CCW 1638, Ottawa, ON, K1H 8L6, Canada
| | - Cheryl Kreviazuk
- Division of Orthopaedic Surgery, The Ottawa Hospital-General Campus, 501 Smyth Road, CCW 1638, Ottawa, ON, K1H 8L6, Canada
| | - Wade Gofton
- Division of Orthopaedic Surgery, The Ottawa Hospital-General Campus, 501 Smyth Road, CCW 1638, Ottawa, ON, K1H 8L6, Canada
| | - Philippe Phan
- Division of Orthopaedic Surgery, The Ottawa Hospital-General Campus, 501 Smyth Road, CCW 1638, Ottawa, ON, K1H 8L6, Canada
| | - Paul E Beaulé
- Division of Orthopaedic Surgery, The Ottawa Hospital-General Campus, 501 Smyth Road, CCW 1638, Ottawa, ON, K1H 8L6, Canada
| | - George Grammatopoulos
- Division of Orthopaedic Surgery, The Ottawa Hospital-General Campus, 501 Smyth Road, CCW 1638, Ottawa, ON, K1H 8L6, Canada.
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Windsor EN, Sculco PK, Mayman DJ, Vigdorchik JM, Jerabek SA. Spinopelvic Hypermobility Corrects After Staged Bilateral Total Hip Arthroplasty. HSS J 2022; 18:541-549. [PMID: 36263273 PMCID: PMC9527549 DOI: 10.1177/15563316211050353] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 08/06/2021] [Indexed: 02/07/2023]
Abstract
Background: Spinopelvic hypermobility may be secondary to a stiff osteoarthritic hip with a compliant spine. Purpose: We sought to determine if spinopelvic hypermobility resolves after total hip arthroplasty (THA) and when it resolves in patients with bilateral hip osteoarthritis (OA) undergoing staged bilateral THA. We also sought to analyze the change in spinopelvic parameters before and after the second THA. Methods: We conducted a retrospective review of 2047 THAs that were performed by 2 fellowship-trained arthroplasty surgeons from 2014 to 2018. Patients with preoperative spinopelvic hypermobility undergoing staged bilateral THA were identified. Radiographic spinopelvic parameters, including sacral slope (SS), pelvic incidence (PI), lumbar lordosis (LL), PI-LL mismatch, anterior pelvic plane tilt (APPt), and spinopelvic tilt (SPT), were measured on preoperative, 6-week postoperative, and 1-year postoperative lateral standing and sitting radiographs. Bilateral hip OA was graded using Kellgren-Lawrence criteria. Results: We identified 42 patients with preoperative spinopelvic hypermobility who underwent staged bilateral THA. Mean time (standard deviation) between surgeries was 9.4 months (±10.0). After the first THA, spinopelvic hypermobility resolved in 29% of the patients. After the second THA, it resolved in 67% at 6 weeks, increasing to 98% at 1 year postoperatively. Conclusion: Spinopelvic hypermobility resolves after staged bilateral THA in 98% of the patients, occurring most often only after the second THA. Less than one-third of the patients had resolution after the first THA, suggesting that contralateral hip OA continues to drive hip-driven spinopelvic motion. Acetabular component position targets based on functional pelvic position should incorporate these changes in spinopelvic motion with the understanding that resolution of hypermobility usually occurs after the second THA.
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Affiliation(s)
- Eric N. Windsor
- Adult Reconstruction and Joint Replacement Service, Hospital for Special Surgery, New York, NY, USA
| | - Peter K. Sculco
- Adult Reconstruction and Joint Replacement Service, Hospital for Special Surgery, New York, NY, USA
| | - David J. Mayman
- Adult Reconstruction and Joint Replacement Service, Hospital for Special Surgery, New York, NY, USA
| | - Jonathan M. Vigdorchik
- Adult Reconstruction and Joint Replacement Service, Hospital for Special Surgery, New York, NY, USA
| | - Seth A. Jerabek
- Adult Reconstruction and Joint Replacement Service, Hospital for Special Surgery, New York, NY, USA
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Technical Considerations and Avoiding Complications in Total Hip Arthroplasty. J Am Acad Orthop Surg Glob Res Rev 2022; 6:01979360-202211000-00011. [PMID: 36733988 PMCID: PMC9668563 DOI: 10.5435/jaaosglobal-d-22-00234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Accepted: 09/25/2022] [Indexed: 11/22/2022]
Abstract
Total hip arthroplasty (THA) is considered to be the surgical procedure of the 20th century. Current projections show that by 2030, primary THA is expected to grow by 171%, with revision THA expected to increase by 142% in the same time frame. Although complications are not common, when they occur, they can cause notable morbidity to the patient. Understanding the unique anatomy and needs of each patient will prepare the surgeon to avoid soft-tissue or bony injury, optimize prosthesis placement, and decrease the risk of infection. This article aims to highlight common causes of early revision THA and provide specific technical strategies to avoid these complications. Following a systematic approach to the primary THA and using these techniques will assist the surgeon in avoiding complications to revision hip arthroplasty.
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Louette S, Wignall A, Pandit H. Spinopelvic Relationship and Its Impact on Total Hip Arthroplasty. Arthroplast Today 2022; 17:87-93. [PMID: 36042938 PMCID: PMC9420424 DOI: 10.1016/j.artd.2022.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 06/21/2022] [Accepted: 07/04/2022] [Indexed: 11/27/2022] Open
Abstract
The dynamic, complex interaction among the spine, pelvis, and hip is often underappreciated, yet understanding it is vital for both arthroplasty and spinal surgeons. There is an increasing incidence of degenerative hip and spinal pathologies as a result of the ageing population. Furthermore, hip pathology can cause spine pathology and vice versa through “hip-spine” and “spine-hip syndrome.” Consequently, total hip arthroplasty (THA) and spinal fusion surgery, which both affect spinopelvic mobility, are also on the rise. Alteration in spinopelvic motion can affect the orientation of the acetabulum and, therefore, implant positioning in THA, leading to complications such as dislocation, impingement, aseptic loosening, and wear of components. This makes it imperative to assess spinopelvic motion and pelvic tilt prior to patients undergoing THA. In this paper, we explore how the surgeon should proceed to reduce risk of component malalignment, as well as the role of navigation systems in acetabular cup positioning.
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Yun HH, Kim YB, Joo HJ, Koh YY. Does spinopelvic motion change after total hip arthroplasty? INTERNATIONAL ORTHOPAEDICS 2022; 46:2181-2187. [PMID: 35725952 DOI: 10.1007/s00264-022-05486-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 06/13/2022] [Indexed: 12/01/2022]
Abstract
PURPOSE Spinopelvic motion plays an important role in functional acetabular cup position after total hip arthroplasty (THA). Sacral slope (SS) has been a useful surrogate for spinopelvic motion. The present study aimed to investigate statistical characteristics of spinopelvic motion before and after THA using changes in SS in supine, standing, and sitting positions. METHODS A total of 76 patients (88 hips) were assessed. To classify spinopelvic mobility, defined as a change in SS from standing to sitting position (ΔSSstand/sit), 10° ≤ ΔSSstand/sit ≤ 30°, ΔSSstand/sit < 10°, and ΔSSstand/sit > 30° were considered normal, stiff, and hypermobile, respectively. RESULTS Over ± 7° changes in SS between before and one year after THA were observed in 39 (44.3%) hips in the sitting position, 19 (21.6%) hips in the supine position, seven (7.9%) in the standing position. Percentages of hips with stiff spinopelvic mobility (11.4% vs. 22.7%) and hypermobile spinopelvic mobility (23.9% vs. 12.5%) between before THA and one year after THA were significantly different (p = 0.034 and p = 0.016, McNemar's test). At one year after THA, 40.0% (4/10) of hips with stiff spinopelvic mobility and 57.1% (12/21) of hips with hypermobile spinopelvic mobility shifted to normal spinopelvic mobility. CONCLUSIONS Change in SS between before THA and one year after THA had a high inter-subject variability especially in the sitting position. In addition, there was a distinct shift to normal spinopelvic mobility postoperatively in hips with stiff and hypermobile spinopelvic mobility pre-operatively.
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Affiliation(s)
- Ho Hyun Yun
- Department of Orthopaedic Surgery, Veterans Healthcare Service Medical Center, Seoul, South Korea, 134791.
| | - Young Bae Kim
- Department of Orthopaedic Surgery, Veterans Healthcare Service Medical Center, Seoul, South Korea, 134791
| | - Hong Joon Joo
- Department of Orthopaedic Surgery, Veterans Healthcare Service Medical Center, Seoul, South Korea, 134791
| | - Yeong Yoon Koh
- Department of Orthopaedic Surgery, Veterans Healthcare Service Medical Center, Seoul, South Korea, 134791
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