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Harada S, Hamai S, Shiomoto K, Kawahara S, Hara D, Harada T, Nakashima Y. Predictors of physical activity recovery after total hip arthroplasty: a prospective observational study. INTERNATIONAL ORTHOPAEDICS 2024; 48:753-760. [PMID: 37923880 DOI: 10.1007/s00264-023-06022-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 10/23/2023] [Indexed: 11/06/2023]
Abstract
PURPOSE Little is known about the changes and the factors in physical activity as following total hip arthroplasty (THA). There are potential discrepancies between subjective and objective measurements of physical activity. Thus, our porpose is to compare objective and subjective measurements of activity levels in patients undergoing THA preoperatively, three months and one year following surgery, and investigated the factors that predicts the objective activity level after THA. METHODS This prospective observational study included 42 patients with unilateral symptomatic hip osteoarthritis who underwent THA. The objective activity level (step counts, sit-to-stands, and upright time) by using a tri-axial accelerometer, PRO (Oxford hip score; OHS and University of California, Los Angeles activity score; UCLA score), and muscle volume around the hip joint by using preoperative computed tomography were measured. RESULTS The number of steps, OHS, and UCLA score before, at three months, and one year after THA averaged 5092, 6532, and 6545 steps, 30.3, 43.0, and 44.2 points, and 3.4, 4.8, and 4.6 points, respectively, with significant postoperative increases (P < 0.05). No significant difference was found between three months and one year postoperatively. In multivariate analysis, younger age and higher preoperative contralateral gluteal medius volume were the predictors of higher postoperative step counts (P < 0.05). CONCLUSIONS Physical activity, including step counts, OHS, and UCLA score increased significantly until three months after unilateral THA. Early surgical intervention before contralateral muscle declines and preoperative rehabilitation including contralateral side may additionally improve postoperative activity levels.
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Affiliation(s)
- Satoru Harada
- Department of Orthopaedic Surgery, Faculty of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Satoshi Hamai
- Department of Orthopaedic Surgery, Faculty of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
- Department of Medical-Engineering Collaboration for Healthy Longevity, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
| | - Kyohei Shiomoto
- Department of Orthopaedic Surgery, Faculty of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Shinya Kawahara
- Department of Orthopaedic Surgery, Faculty of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Daisuke Hara
- Department of Orthopaedic Surgery, Faculty of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Tetsunari Harada
- Department of Orthopaedic Surgery, Faculty of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Yasuharu Nakashima
- Department of Orthopaedic Surgery, Faculty of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
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Kim HS, Lee HJ, Yoo JJ. Minimal pre-operative leg length discrepancy as a risk factor of post-operative leg length discrepancy after total hip arthroplasty: a retrospective study of patients with non-traumatic osteonecrosis of the femoral head. BMC Musculoskelet Disord 2023; 24:954. [PMID: 38066461 PMCID: PMC10704764 DOI: 10.1186/s12891-023-07086-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 11/30/2023] [Indexed: 12/18/2023] Open
Abstract
BACKGROUND Leg length discrepancy (LLD) is one of the troublesome complications of total hip arthroplasty (THA). Previously, several risk factors have been suggested, but they were subjected to their inherent limitations. By controlling confounding variables, we hypothesized that known risk factors be re-evaluated and novel ones be discovered. This study aimed to analyze the independent risk factors for LLD after primary THA in patients with non-traumatic osteonecrosis of the femoral head (ONFH). METHODS We retrospectively reviewed patients with non-traumatic ONFH who underwent unilateral THA between 2014 and 2021. All patients were operated by one senior surgeon using a single implant. Demographic data, surgical parameters, and radiological findings (pre-operative LLD, Dorr classification, and femoral neck resection) were analyzed to identify the risk factors of ≥ 5 mm post-operative LLD based on radiological measurement and to calculate odds ratios by logistic regression analysis. Post hoc power analysis demonstrated that the number of analyzed patients was sufficient with 80% power. RESULTS One hundred and eighty-six patients were analyzed, including 96 females, with a mean age of 58.8 years at the time of initial THA. The average post-operative LLD was 1.2 ± 2.9 mm in the control group and 9.7 ± 3.2 mm in the LLD group, respectively. The LLD group tended to have minimal pre-operative LLD than the control group (-3.2 ± 5.1 mm vs. -7.9 ± 5.8 mm p = 2.38 × 10- 8). No significant difference was found between the groups in age, gender, body mass index, femoral cortical index, and implant size. CONCLUSION Mild pre-operative LLD is associated with an increased risk of post-operative LLD after primary THA in patients with ONFH. Thus, surgeons should recognize pre-operative LLD to achieve an optimal outcome and must inform patients about the risk of developing LLD.
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Affiliation(s)
- Hong Seok Kim
- Department of Orthopedic Surgery, Seoul National University Hospital, Seoul, South Korea
- Department of Orthopedic Surgery, College of Medicine, Seoul National University, Seoul, South Korea
| | - Han Jin Lee
- Department of Orthopedic Surgery, Hanil General Hospital, Seoul, South Korea
| | - Jeong Joon Yoo
- Department of Orthopedic Surgery, Seoul National University Hospital, Seoul, South Korea.
- Department of Orthopedic Surgery, College of Medicine, Seoul National University, Seoul, South Korea.
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Huang Z, Zhang Z, Lu X, Liu Y, Zhang H. The influence of prosthetic positioning and proximal femoral morphology on leg length discrepancy and early clinical outcomes of cementless total hip arthroplasty. J Orthop Surg Res 2023; 18:408. [PMID: 37277763 DOI: 10.1186/s13018-023-03847-w] [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: 03/03/2023] [Accepted: 05/09/2023] [Indexed: 06/07/2023] Open
Abstract
BACKGROUND Leg length discrepancy (LLD) is a common complication of total hip arthroplasty (THA). However, the relationship between femoral prosthesis filling, proximal femoral morphology, and acetabular prosthesis positioning with postoperative LLD and clinical outcomes is unclear. The aims of this study were to investigate the influence of canal flare index (CFI), canal fill ratio (CFR), center of rotation (COR), and femoral offset (FO) on (1) postoperative LLD; and (2) clinical outcomes in the two stem designs with different coating distribution. METHODS The study cohort included 161 patients who underwent primary cementless THA between January 2021 and March 2022 with either proximal coating or full coating stems. Multivariate logistic regression was used to assess the effect of CFI, CFR, COR, and FO on postoperative LLD, and linear regression to assess their effect on clinical outcomes. RESULTS No statistical difference was found in clinical outcomes or postoperative LLD between the two groups. High CFI (p = 0.014), low ΔVCOR (p = 0.012), and Gender (p = 0.028) were found independent risk factors for LLD one day postoperative. High CFI was also an independent risk factor for postoperative subjectively perceived LLD (p = 0.013). CFR at the level of 2 cm below the LT (p = 0.017) was an independent risk factor for Harris Hip Score. CONCLUSIONS Proximal femoral morphology and acetabular prosthesis positioning but not femoral prosthesis filling affected the LLD. High CFI was an independent risk factor for postoperative LLD and subjectively perceived LLD, and low ΔVCOR was also an independent risk factor for postoperative LLD. Women were susceptible to postoperative LLD.
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Affiliation(s)
- Zhenchao Huang
- Department of Joint Surgery, The Affiliated Hospital of Qingdao University, Qingdao, 266000, Shandong, China
| | - Zian Zhang
- Department of Joint Surgery, The Affiliated Hospital of Qingdao University, Qingdao, 266000, Shandong, China
| | - Xinzhe Lu
- Department of Joint Surgery, The Affiliated Hospital of Qingdao University, Qingdao, 266000, Shandong, China
| | - Yikai Liu
- Department of Joint Surgery, The Affiliated Hospital of Qingdao University, Qingdao, 266000, Shandong, China
| | - Haining Zhang
- Department of Joint Surgery, The Affiliated Hospital of Qingdao University, Qingdao, 266000, Shandong, China.
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Adamczyk A, Laboudie P, Nessek H, Kim PR, Gofton WT, Feibel R, Grammatopoulos G. Accuracy of digital templating in uncemented primary total hip arthroplasty: which factors are associated with accuracy of preoperative planning? Hip Int 2023; 33:434-441. [PMID: 35438031 DOI: 10.1177/11207000221082026] [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 Preoperative planning is a fundamental step for successful total hip arthroplasty (THA). Studies have highlighted the accuracy of preoperative digital templating for estimating acetabular cup and stem size. Stem design such as single-wedge metadiaphyseal (Type 1 stem) versus mid-short stem (microplasty) and surgical approach (anterior, direct lateral or posterior) have not been well investigated as predictors of THA templating accuracy. METHODS 204 patients (220 hips) who had undergone elective THA between November 2016 and December 2019 and presented a saved preoperative template were retrospectively reviewed. Templates from 5 different surgeons were involved in the analysis. 3 different approaches were used: direct lateral (DL), posterior (PA), direct anterior (DAA). 2 different stem designs were used: single-wedge metadiaphyseal and single-wedge mid-short (Biomet Taperloc Microplasty), while the acetabular component remained the same. Bivariate and multivariate regression analyses were performed to determine predictors of accuracy. RESULTS Femoral component size templating accuracy was significantly improved when using the single-wedge mid-short stem (Taperloc Microplasty) design when performing bivariate analysis. Although accuracy of cup sizing was not affected by approach, precision was significantly better in the PA group (p < 0.05). Accuracy of templating was found to be independent of BMI and gender but dependent on presence of calibration marker and stem design (p < 0.05). CONCLUSIONS When striving for improved templating accuracy, acetabular and femoral component accuracy were best achieved using a calibration marker and a metaphyseal short femoral stem design.
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Affiliation(s)
- Andrew Adamczyk
- Division of Orthopaedic Surgery, The Ottawa Hospital, Ottawa, ON, Canada
- Faculty of Medicine, University of Ottawa, Ontario, ON, Canada
| | - Pierre Laboudie
- Division of Orthopaedic Surgery, The Ottawa Hospital, Ottawa, ON, Canada
- Faculty of Medicine, University of Ottawa, Ontario, ON, Canada
| | - Hamid Nessek
- Faculty of Medicine, University of Ottawa, Ontario, ON, Canada
| | - Paul R Kim
- Division of Orthopaedic Surgery, The Ottawa Hospital, Ottawa, ON, Canada
- Faculty of Medicine, University of Ottawa, Ontario, ON, Canada
| | - Wade T Gofton
- Division of Orthopaedic Surgery, The Ottawa Hospital, Ottawa, ON, Canada
- Faculty of Medicine, University of Ottawa, Ontario, ON, Canada
| | - Robert Feibel
- Division of Orthopaedic Surgery, The Ottawa Hospital, Ottawa, ON, Canada
- Faculty of Medicine, University of Ottawa, Ontario, ON, Canada
| | - George Grammatopoulos
- Division of Orthopaedic Surgery, The Ottawa Hospital, Ottawa, ON, Canada
- Faculty of Medicine, University of Ottawa, Ontario, ON, Canada
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The Surgical Treatment of Osteoarthritis. LIFE (BASEL, SWITZERLAND) 2022; 12:life12070982. [PMID: 35888072 PMCID: PMC9319328 DOI: 10.3390/life12070982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 06/20/2022] [Accepted: 06/28/2022] [Indexed: 11/17/2022]
Abstract
Osteoarthritis is a degenerative condition affecting the whole joint with the underlying bone, representing a major source of pain, disability, and socioeconomic cost worldwide. Age is considered the strongest risk factor, albeit abnormal biomechanics, morphology, congenital abnormality, deformity, malalignment, limb-length discrepancy, lifestyle, and injury may further increase the risk of the development and progression of osteoarthritis as well. Pain and loss of function are the main clinical features that lead to treatment. Although early manifestations of osteoarthritis are amenable to lifestyle modification, adequate pain management, and physical therapy, disease advancement frequently requires surgical treatment. The symptomatic progression of osteoarthritis with radiographical confirmation can be addressed either with arthroscopic interventions, (joint) preservation techniques, or bone fusion procedures, whereas (joint) replacement is preferentially reserved for severe and end-stage disease. The surgical treatment aims at alleviating pain and disability while restoring native biomechanics. Miscellaneous surgical techniques for addressing osteoarthritis exist. Advanced computer-integrated surgical concepts allow for patient personalization and optimization of surgical treatment. The scope of this article is to present an overview of the fundamentals of conventional surgical treatment options for osteoarthritis of the human skeleton, with emphasis on arthroscopy, preservation, arthrodesis, and replacement. Contemporary computer-assisted orthopaedic surgery concepts are further elucidated.
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Ma J, Li J, Cao L, Sun K, Yang H, Fan H. Letter to editor regarding "The morphology of the proximal femur in cementless short-stem total hip arthroplasty: no negative effect on offset reconstruction, leg length difference and implant positioning". J Orthop Surg Res 2022; 17:213. [PMID: 35392984 PMCID: PMC8991586 DOI: 10.1186/s13018-022-03119-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 02/25/2022] [Indexed: 11/10/2022] Open
Affiliation(s)
- Jimin Ma
- Department of Orthopedics, Fuyang Hospital of Anhui Medical University, Fuyang, Anhui, China
| | - Jiale Li
- Department of Orthopedics, Fuyang Hospital of Anhui Medical University, Fuyang, Anhui, China
| | - Le Cao
- Department of Orthopedics, Fuyang Hospital of Anhui Medical University, Fuyang, Anhui, China
| | - Kai Sun
- Department of Orthopedics, Fuyang Hospital of Anhui Medical University, Fuyang, Anhui, China
| | - Haitao Yang
- Department of Orthopedics, Fuyang Hospital of Anhui Medical University, Fuyang, Anhui, China
| | - Haitao Fan
- Department of Orthopedics, Fuyang Hospital of Anhui Medical University, Fuyang, Anhui, China.
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Veldman HD, Boymans TAEJ, van Steenbergen LN, Heyligers IC. Age-Associated Changes in Proximal Femur Morphology Affect Femoral Component Sizing in Cementless Hip Arthroplasty. Geriatr Orthop Surg Rehabil 2022; 13:21514593221144615. [DOI: 10.1177/21514593221144615] [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] [Received: 07/13/2022] [Revised: 11/16/2022] [Accepted: 11/21/2022] [Indexed: 12/13/2022] Open
Abstract
Background In cementless hip arthroplasty, the femoral component should obtain firm fixation within the endosteal bone and achieve adequate reconstruction of hip joint biomechanics simultaneously. Previous anatomical studies described age-related changes of the proximal femoral canal, such as canal widening, which theoretically necessitates the use of larger stem sizes in elderly patients. This study examines a potential association between patients’ age at surgery and the implant size of a cementless femoral component. Material and methods A total of 13,423 primary hip arthroplasties with a single cementless stem registered in the Dutch Arthroplasty Register (LROI) were included. Patient characteristics (ie patients’ age, sex, height and weight at time of surgery) and femoral component size were derived. A one-way ANCOVA was used to compare the mean stem size between age groups, and multivariable linear regression analysis was used in order to investigate to which extent ageing impacted stem size. Results Each subsequent age- group (ten-year intervals) had a significantly larger mean stem size than the prior age- group. Multivariable linear regression analysis revealed that age is positively correlated with stem size and that this correlation is more prominent in females than in males (beta = .046, P < .001 and beta = .028, P < .001 respectively). Interpretation Implant size is positively correlated with age, in particular in females and independently from investigated anthropometric characteristics. The present study endorses that the femoral canal morphology is related to patients’ characteristics such as age and sex. The morphology will subsequently influence implant sizing and therefore may have biomechanical and clinical implications.
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Affiliation(s)
- Hidde D. Veldman
- Department of Orthopaedic Surgery and Traumatology, Zuyderland Medical Center Heerlen, Netherlands
| | | | | | - Ide C. Heyligers
- Department of Orthopaedic Surgery and Traumatology, Zuyderland Medical Center Heerlen, Netherlands
- School of Health Professions Education, Maastricht University, Netherlands
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The morphology of the proximal femur in cementless short-stem total hip arthroplasty: No negative effect on offset reconstruction, leg length difference and implant positioning. J Orthop Surg Res 2021; 16:730. [PMID: 34930358 PMCID: PMC8686665 DOI: 10.1186/s13018-021-02876-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 12/05/2021] [Indexed: 11/10/2022] Open
Abstract
Background Correct reconstruction of hip offset (HO) and leg length are important for clinical–functional outcome and patient satisfaction in total hip arthroplasty (THA). The morphology of the proximal femur can pose a risk for increased leg length difference (LLD) in cementless straight-stem THA. We therefore wanted to evaluate, if this is also applicable in THA with a cementless meta-diaphyseal short stem. Methods In a retrospective study, 106 patients (index surgery 2014–2019) with unilateral THA and a morphologically healthy hip as a reference (Kellgren–Lawrence ≤ 1) were included. The same cementless short stem with meta-diaphyseal fixation and cementless press-fit cup was implanted. The proximal femur was rated by Dorr’s classification, and subgroups were formed afterward. Measurements were carried out on preoperative and 3 months postoperative anterior–posterior radiographs of the pelvis. Kruskal–Wallis test, Fisher’s exact test and binary logistic regression were performed to evaluate the influence of the anatomical shape on postoperative leg length difference and offset reconstruction. Results The Dorr type did not show any significance influence on LLD (p = 0.532), or postoperative difference in femoral offset (p = 0.243), acetabular offset (p = 0.106) and hip offset (p = 0.698). Stem alignment (p = 0.705) and canal fill indices (CFI I: p = 0.321; CFI II: p = 0.411; CFI III: p = 0.478) were also without significant differences. Logistic regression did not show any significant increased risk for a LLD ≥ 5 mm or ≥ 10 mm as well as HO ≥ 5 mm or ≥ 10 mm. Conclusion Reconstruction of hip offset and postoperative leg length difference is not negatively influenced by Dorr type, canal flare index, cortical index and canal-to-calcar ratio in cementless short-stem THA. Implant positioning and canal fill are also not negatively affected by the anatomical shape of the proximal femur. Level of evidence: Level IV.
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Cementless femoral stem fixation and leg-length discrepancy after total hip arthroplasty in different proximal femoral morphological types. INTERNATIONAL ORTHOPAEDICS 2020; 45:891-896. [PMID: 32572540 DOI: 10.1007/s00264-020-04671-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 06/17/2020] [Indexed: 02/06/2023]
Abstract
PURPOSE Leg-length changes at total hip arthroplasty (THA) may result from too proximal position of the femoral component, i.e. not being sunk deep enough into the femoral canal due to the size and shape of both medullary canal and implant. Some femoral implants are designed to achieve such fixation in the mediolateral dimension, while others also engage the bone anteroposteriorly. Our aim was to examine the relationship between proximal femoral morphology, osseointegration and leg-length equalization at THA. We asked whether the Dorr classification, femoral cortical index and canal flare index on preoperative radiographs had significant impact on THA aseptic loosening rates and post-operative leg-length discrepancy (LLD). METHODS Literature review included original articles on proximal femoral morphology with post-operative LLD and other clinical outcomes of THA, published in the last decade. Case reports and biomechanical studies without clinical data were excluded. RESULTS Higher femoral cortical index and/or canal flare index (corresponding to the Dorr type A) increases the risk of leg lengthening at THA. This is particularly notable in femoral stems with metaphyseal fixation, where high canal flare index has also been linked to osseointegration failure and implant loosening. On the other hand, lower canal flare index (corresponding to the Dorr type C) is more prevalent in the elderly population and increases late periprosthetic fracture rates and stress shielding. Even the most commonly used cementless femoral stems cannot offer optimal fit to intra-/extramedullary geometry or offset restoration in up to 30% of clinical cases. CONCLUSIONS Femoral morphology can have significant impact on post-operative LLD and osseointegration of cementless THA. Quantitative measurements of the proximal femoral canal may improve the choice of a particular implant and fixation method.
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Watanabe K, Mitsui K, Usuda Y, Nemoto K. An increase in the risk of excessive femoral anteversion for relatively younger age and types of femoral morphology in total hip arthroplasty with direct anterior approach. J Orthop Surg (Hong Kong) 2020; 27:2309499019836816. [PMID: 30913961 DOI: 10.1177/2309499019836816] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Direct anterior approach (DAA) is known to diminish a dislocation risk and widely used for total hip arthroplasty (THA). On the other hand, anterior dislocation due to increasing stem anteversion and cup anteversion is an important complication. METHODS A retrospective analysis of 140 (male/female: 10/130) consecutive patients with 149 hips who had undergone primary THA in the period between 2011 and 2015 was conducted. Factors including age, gender, body mass index (BMI), and primary diagnosis were examined. Radiographic parameters including the Dorr proximal femoral types, cortical thickness index (CTI), canal flare index (CFI), and canal to calcar index were measured. To investigate relationships of combined anteversion (CA) with other factors, a stepwise regression analysis was performed. RESULTS The mean age, BMI, and the follow-up period were 69.5 ± 10.3 years old, 23.4 ± 3.4 kg/m2, and 48.2 ± 13.6 months, respectively. The proximal femurs of the 149 hips were categorized as Dorr type A ( n = 33), type B ( n = 110), and type C ( n = 6). The mean CTI, CFI, and canal to calcar index were 0.56 ± 0.08, 4.15 ± 0.83, and 0.46 ± 0.09, respectively. The mean stem varus angle, radiographic inclination, and radiographic anteversion of the cup were 0.19 ± 1.63, 40.9 ± 6.0°, and 12.7 ± 3.5°, respectively. Stem anteversion measured by computed tomography (CT) axial image was 17.7 ± 12.0°. The mean radiographic inclination, radiographic anteversion (CTRA), and anatomical anteversion analyzed by Kyocera 3-D template were 40.8 ± 7.2°, 19.8 ± 6.6°, and 28.8 ± 10.0°, respectively. Mean CA defined as the sum of stem anteversion and CTRA was 37.5 ± 14.5°. To investigate relationships of CA with other factors, a stepwise regression analysis was performed and resulted in a model with age ( p < 0.001). In the same way, stem anteversion and CTRA were analyzed; only for the stem anteversion, the stepwise selection process resulted in a model with age ( p < 0.001) and the Dorr types ( p = 0.047). CONCLUSION The risk of excessive femoral anteversion increases for relatively younger age and for types of femoral morphology according to the Dorr classification, moreover with an increase of CA in DAA-THA with cementless tapered-wedge stem.
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Affiliation(s)
- Kenya Watanabe
- Department of Orthopedic Surgery, Nagano Prefectural Shinshu Medical Center, Nagano, Japan
| | - Katsuhiro Mitsui
- Department of Orthopedic Surgery, Nagano Prefectural Shinshu Medical Center, Nagano, Japan
| | - Yu Usuda
- Department of Orthopedic Surgery, Nagano Prefectural Shinshu Medical Center, Nagano, Japan
| | - Kazuaki Nemoto
- Department of Orthopedic Surgery, Nagano Prefectural Shinshu Medical Center, Nagano, Japan
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Kishimoto Y, Suda H, Kishi T, Takahashi T. A low-volume surgeon is an independent risk factor for leg length discrepancy after primary total hip arthroplasty: a case-control study. INTERNATIONAL ORTHOPAEDICS 2020; 44:445-451. [PMID: 31673739 DOI: 10.1007/s00264-019-04435-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 10/02/2019] [Indexed: 11/30/2022]
Abstract
PURPOSE Leg length discrepancy (LLD) is one of the bothersome complications that reduce patient satisfaction after total hip arthroplasty (THA). This study aimed to investigate the independent risk factors of LLD after primary THA. METHODS This is a case-control study of 163 THAs for 163 patients at our institution between April 2015 and March 2018. The relevant data about the general characteristics of the patients (age, sex, body mass index, and diagnosis), surgery (surgical approach, type of femoral stem fixation, and surgeon volume), and radiological findings (Dorr classification and pre-operative LLD) were reviewed to identify the risk factors of ≥ 5 mm post-operative LLD according to radiological measurement and to calculate odds ratios (OR) via logistic regression analysis. RESULTS The median (interquartile) absolute value of post-operative LLD was 3.9 (2.3-7.4) mm, and 57 (35.0%) patients had LLD of ≥ 5 mm. After controlling for possible confounders, a low-volume surgeon was considered the only independent risk factor of post-operative LLD (adjusted OR: 8.26; 95% confidence interval: 3.48, 19.60; P < 0.001). Among the 103 patients performed by high-volume surgeons, 82 (79.6%) had LLD of < 5 mm, whereas among the 60 patients performed by low-volume surgeons, only 24 (40.0%) achieved LLD of < 5 mm (P < 0.001). CONCLUSION A low-volume surgeon is associated with an increased risk of a post-operative LLD after primary THA, and the importance of measurements should be recognized to prevent post-operative LLD and achieve optimal outcomes. Moreover, surgeons must inform patients about the risk of developing LLD pre-operatively.
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Affiliation(s)
- Yuji Kishimoto
- Department of Rheumatology, Tottori Red Cross Hospital, 117 Shotoku-cho, Tottori-shi, Tottori, 680-8517, Japan.
- Department of Orthopedic Surgery, Tottori Red Cross Hospital, Tottori, 680-8517, Japan.
| | - Hiroko Suda
- Department of Orthopedic Surgery, Tottori Red Cross Hospital, Tottori, 680-8517, Japan
| | - Takahiro Kishi
- Department of Orthopedic Surgery, Tottori Red Cross Hospital, Tottori, 680-8517, Japan
| | - Toshiaki Takahashi
- Department of Orthopedic Surgery, Tottori Red Cross Hospital, Tottori, 680-8517, Japan
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Kase M, O'Loughlin PF, Aït-Si-Selmi T, Pagenstert G, Langlois J, Bothorel H, Bonnin MP. Pre-operative templating in THA. Part I: a classification of architectural hip deformities. Arch Orthop Trauma Surg 2020; 140:129-137. [PMID: 31696320 DOI: 10.1007/s00402-019-03298-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Indexed: 02/07/2023]
Abstract
INTRODUCTION While numerous classifications of hip arthritis have been proposed, none considered the magnitude and direction of femoral head translation relative to the native acetabulum. A more precise classification of architectural hip deformities is necessary to improve preoperative templating and anticipate surgical challenges of total hip arthroplasty (THA). The purpose of the present study was to introduce a classification system to distinguish different types of architectural hip deformities, based on femoral head translation patterns, and to evaluate its repeatability using plain radiographs (qualitative) and Computed Tomography (CT) measurements (quantitative). MATERIALS AND METHODS We studied pre-operative frontal and lateral hip radiographs and CT scans of 191 hips (184 patients) that received primary THA. The distance between the femoral head center (FC) and the acetabular center (AC) was measured, as well as femoral offset, acetabular offset, head center height, acetabular floor distance and femoral neck angle. The hips were classified qualitatively using frontal plain radiographs, and then quantitatively using CT scans (with an arbitrary threshold of 3 mm as Centered, Medialized, Lateralized, Proximalized or Proximo-lateralized. The agreement between qualitative and quantitative classification methods was compared for applying the same classification. RESULTS Qualitative classification identified 120 centered (63%), 8 medialized (4%), 49 lateralized (26%), 3 proximalized (2%), and 11 proximo-lateralized (6%) hips, while quantitative classification identified 116 centered (61%), 8 medialized (4%), 51 lateralized (27%), 5 proximalized (3%), and 11 proximo-lateralized (6%) hips. The agreement between the two methods was excellent (0.94; CI 0.90-0.98). Medialization reached 9.7 mm, while lateralization reached 10.9 mm, and proximalization reached 8.5 mm. Proximalized and proximo-lateralized hips had more valgus necks, while medialized hips had more varus necks (p = 0.003). CONCLUSIONS The classification system enabled repeatable distinction of 5 types of architectural hip deformities. The excellent agreement between quantitative and qualitative methods suggests that plain radiographs are sufficient to classify architectural hip deformities.
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Affiliation(s)
- Masanori Kase
- Department of Orthopaedic Surgery, Nissan Tamagawa Hospital, Setagaya-ku, Tokyo, Japan
| | - Padhraig F O'Loughlin
- Department of Orthopaedic Surgery, Mater Hospital Cork, Cork, Ireland
- Ramsay Santé, Hôpital Privé Jean Mermoz, Centre Orthopédique Santy, Lyon, France
| | - Tarik Aït-Si-Selmi
- Ramsay Santé, Hôpital Privé Jean Mermoz, Centre Orthopédique Santy, Lyon, France
- Artro Institute, Lyon, France
| | - Geert Pagenstert
- Department of Clinical Research, University of Basel, Basel, Switzerland
- Clarahof Clinic of Orthopaedic Surgery, Merian-Iselin-Hospital Swiss Olympic Medical Center, Basel, Switzerland
- Knee Institute Basel, Basel, Switzerland
| | - Jean Langlois
- Ramsay Santé, Hôpital Privé Jean Mermoz, Centre Orthopédique Santy, Lyon, France
| | - Hugo Bothorel
- ReSurg SA, Rue Saint-Jean 22, 1260, Nyon, Switzerland.
| | - Michel P Bonnin
- Ramsay Santé, Hôpital Privé Jean Mermoz, Centre Orthopédique Santy, Lyon, France
- Artro Institute, Lyon, France
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13
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Mavčič B, Dolinar D, Pompe B, Antolič V. Patient-dependent risk factors for self-perceived leg length discrepancy after total hip arthroplasty. EUROPEAN JOURNAL OF ORTHOPAEDIC SURGERY AND TRAUMATOLOGY 2019; 29:793-799. [PMID: 30680543 DOI: 10.1007/s00590-019-02389-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Accepted: 01/21/2019] [Indexed: 12/01/2022]
Abstract
PURPOSE Patients with equal objective leg length discrepancy (LLD) may have different subjective perceptions of this condition. Our aim was to analyze the effects of gender, age, operated side, surgical approach, body height, body mass index (BMI) and LLD measurements on self-perceived LLD after total hip arthroplasty (THA). MATERIALS AND METHODS Observational cohort study with minimum 5-year follow-up included 159 patients with unilateral primary THA at a single institution, who reported subjective feeling of equal or unequal leg lengths after THA. Gender, age, body height, BMI, surgical approach, preoperative and postoperative absolute/relative/pelvic radiographic LLD measurements were included in direct comparison between groups and multivariate analyses with self-perceived LLD as the outcome variable. RESULTS Out of 159 participants, 39% subjectively perceived postoperative LLD, while others reported equal leg lengths. The two groups postoperatively differed in the median relative LLD (10 mm vs. 5 mm; p = 0.01) and WOMAC (230 mm vs. 110 mm; p < 0.01), but not in the pelvic radiographic LLD. After adjustment for gender, age, operated side and surgical approach, postoperative relative LLD (odds ratio 1.38 for each 5 mm increment; 95% CI 1.01-1.74) and combination of BMI < 26 kg/m2 and body height < 1.75 m (odds ratio 2.49; 95% CI 1.14-5.41) were independent risk factors for self-perceived LLD. CONCLUSIONS Clinical relative LLD measurements are better predictors of self-perceived postoperative LLD than pelvic radiographic measurements. Patients with smaller body dimensions will more likely report subjective leg length inequality at a given objective LLD, regardless of gender or age.
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Affiliation(s)
- Blaž Mavčič
- University Medical Centre Ljubljana and Faculty of Medicine, Zaloška 9, 1000, Ljubljana, Slovenia.
| | - Drago Dolinar
- University Medical Centre Ljubljana and Faculty of Medicine, Zaloška 9, 1000, Ljubljana, Slovenia
| | - Borut Pompe
- University Medical Centre Ljubljana and Faculty of Medicine, Zaloška 9, 1000, Ljubljana, Slovenia
| | - Vane Antolič
- University Medical Centre Ljubljana and Faculty of Medicine, Zaloška 9, 1000, Ljubljana, Slovenia
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14
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Yoo JI, Cha YH, Kim KJ, Kim HY, Choy WS, Hwang SC. Comparison between Cementless and Cemented Bipolar Hemiarthroplasty for Treatment of Unstable Intertrochanteric Fractures: Systematic Review and Meta-analysis. Hip Pelvis 2018; 30:241-253. [PMID: 30534543 PMCID: PMC6284077 DOI: 10.5371/hp.2018.30.4.241] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 10/29/2018] [Accepted: 10/30/2018] [Indexed: 12/25/2022] Open
Abstract
Purpose This study was conducted to compare cemented and cementless bipolar hemiarthroplasty in elderly patients with unstable intertrochanteric fractures via meta-analysis and systematic review of relevant studies. Materials and Methods Systematic review and meta-analysis were performed on 31 available clinical studies; 19 of these studies used cemented stems, 12 used cementless stems, one used both types of stems, and two studies involved a comparative analysis of both stem types. Results There were statistically significant differences in rates of leg length discrepancy (LLD) greater than 1 cm between the cemented (event rate, 0.089) and cementless groups (event rate, 0.015 and 0.047; P=0.03). Conclusion Cemented bipolar hemiarthroplasty and cementless bipolar hemiarthroplasty performed on elderly patients with unstable intertrochanteric fracture revealed similar mortality and complication rates; however, the rate of LLD greater than 1 cm was significantly higher in the cemented group compared with the cementless group.
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Affiliation(s)
- Jun-Il Yoo
- Department of Orthopaedic Surgery, Gyeongsang National University Hospital, Jinju, Korea
| | - Yong-Han Cha
- Department of Orthopaedic Surgery, Eulji University Hospital, Daejeon, Korea
| | - Kap-Jung Kim
- Department of Orthopaedic Surgery, Eulji University Hospital, Daejeon, Korea
| | - Ha-Yong Kim
- Department of Orthopaedic Surgery, Eulji University Hospital, Daejeon, Korea
| | - Won-Sik Choy
- Department of Orthopaedic Surgery, Eulji University Hospital, Daejeon, Korea
| | - Sun-Chul Hwang
- Department of Orthopaedic Surgery, Gyeongsang National University Hospital, Jinju, Korea
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