1
|
Brüggemann H, Paulsen A, Oppedal K, Grasmair M, Hömberg D. Reliably calibrating X-ray images required for preoperative planning of THA using a device-adapted magnification factor. PLoS One 2024; 19:e0307259. [PMID: 39172955 PMCID: PMC11340982 DOI: 10.1371/journal.pone.0307259] [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: 04/30/2023] [Accepted: 07/02/2024] [Indexed: 08/24/2024] Open
Abstract
BACKGROUND AND AIM Calibrated pelvic X-ray images are needed in the preoperative planning of total hip arthroplasty (THA) to predict component sizes. Errors and mismatch in the size of one or more components are reported, which can lead to clinically relevant complications. Our aim is to investigate whether we can solve the fundamental problem of X-ray calibration and whether traditional X-ray still has a place in preoperative planning despite improved radiological alternatives. METHODS Based on geometric and radiographic principles, we estimate that the magnification factor is adapted to the X-ray device and depends strongly on the source-image distance of the device. We analyse the errors of the various calibration methods and investigate which narrow range can be expected to show that the center of rotation is sufficiently accurate. Based on the results of several CT-scans we defined an adapted magnification factor and validated the degree of measurement accuracy. RESULTS The true magnification of objects on X-ray images depends mainly on the device settings. Stem size prediction is possible to a limited extent, with an error margin of 4.3%. Components can be predicted with a safety margin of one size up and down as with CT or 3D images. The prerequisite is that the source-image distance is greater than or equal to 120 cm, the table-image distance is known, and the object-image distance is estimated according to the patient's BMI. We defined a device-adapted magnification factor that simplifies the templating routine and can be used to obtain the most reliable preoperative dimensional measurements that can be expected from X-ray images. We found the error margin of the magnification factor with the highest degrees of prediction and precision. CONCLUSION Preoperative planning is reliable and reproducible using X-ray images if calibration is performed with the device-adapted magnification factor suggested in this paper.
Collapse
Affiliation(s)
- Heinrich Brüggemann
- Department of Orthopedic Surgery, Stavanger University Hospital, Stavanger, Norway
| | - Aksel Paulsen
- Department of Orthopedic Surgery, Stavanger University Hospital, Stavanger, Norway
- Department of Public Health, The Faculty of Health Sciences, University of Stavanger, Stavanger, Norway
| | - Ketil Oppedal
- Radiology Department, Stavanger University Hospital, Stavanger, Norway
- Department of Electrical engineering and computer science, University of Stavanger, Stavanger, Norway
| | - Markus Grasmair
- Department of Mathematical Sciences, Norwegian University of Science and Technology, Trondheim, Norway
| | - Dietmar Hömberg
- Department of Mathematical Sciences, Norwegian University of Science and Technology, Trondheim, Norway
- Weierstrass Institute, Berlin, Germany
| |
Collapse
|
2
|
Cheng K, Zhu H, Peng Y, Yan H, Wen X, Cheng Z, Ding H. To further incorporate computer-aided designs to improve preoperative planning in total hip arthroplasty: a cohort study. Front Surg 2024; 11:1345261. [PMID: 39040681 PMCID: PMC11261459 DOI: 10.3389/fsurg.2024.1345261] [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] [Received: 11/27/2023] [Accepted: 06/17/2024] [Indexed: 07/24/2024] Open
Abstract
Background Hip replacement surgeries are increasing in demand, requiring rigorous improvements to a mature surgical protocol. Postoperative patient dissatisfaction mainly stems from postoperative complications resulting from the inappropriate selection of prostheses to meet the needs of each patient. This results in prosthesis loosening, hospital-related fractures, and postoperative complex pain, which can all be attributed to inappropriate sizing. In this study, we aimed to further explore the intraoperative and postoperative benefits of incorporating computer-aided design (CAD) in preoperative planning for total hip arthroplasty (THA). Methods A total of 62 patients requiring total hip replacement surgery from January 2021 to December 2021 were collected and randomly divided into a preoperative computer-aided simulated group and a conventional x-ray interpretation group. The accuracy of implant size selection (femoral and acetabular implant) between the preoperative planning and surgical procedure of the two groups was compared. Patient parameters, perioperative Harris hip scores, operative time (skin-to-skin time), surgical blood loss, and postoperative hospital stay were recorded, and the differences between the two groups were statistically compared using a single sample t-test. Results All patients in the study were successfully operated on and achieved good postoperative functional recovery. With CAD, the selection of the most suitable-sized prosthesis was significantly more accurate compared to the control group (accuracy of the acetabular component between the CAD/control: 80.6%/61.3%, and accuracy of the femoral component: 83.9%/67.7%). Intraoperative blood loss (177.4/231.0 ml, P = 0.002), operation time (84.2 ± 19.8 min/100.3 ± 25.9 min, P = 0.008), duration of hospital stay (6.5 ± 3/9.1 ± 3.9 days, P = 0.003), and postoperative Harris hip score (81.9 ± 6.5/74.7 ± 11.1, P = 0.003) were compared to the control group and showed statistical significance. Conclusion Incorporating CAD into the preoperative planning of total hip arthroplasty can effectively guide the selection of the most suitable-sized prosthesis, reduce intraoperative blood loss, and promote short-term functional recovery after THA.
Collapse
Affiliation(s)
- Kai Cheng
- Department of Orthopedics, Guangzhou First People’s Hospital, Guangzhou, China
| | - Haotian Zhu
- Department of Orthopedics, Guangzhou First People’s Hospital, Guangzhou, China
- School of Medicine, South China University of Technology, Guangzhou, China
| | - Yuanhao Peng
- School of Medicine, South China University of Technology, Guangzhou, China
| | - Han Yan
- Department of Orthopedics, Guangzhou First People’s Hospital, Guangzhou, China
| | - Xinghua Wen
- School of Biomedical Sciences and Engineering, South China University of Technology, Guangzhou, China
| | - Zixuan Cheng
- Department of Radiology, Guangzhou First People’s Hospital, Guangzhou, China
| | - Huanwen Ding
- Department of Orthopedics, Guangzhou First People’s Hospital, Guangzhou, China
- School of Medicine, South China University of Technology, Guangzhou, China
| |
Collapse
|
3
|
Pichler L, Klein L, Perka CF, Gwinner C, El Kayali MKD. The accuracy of preoperative implant size prediction achieved by digital templating in total knee arthroplasty is not affected by the quality of lateral knee radiographs. J Exp Orthop 2024; 11:e12102. [PMID: 39050591 PMCID: PMC11267166 DOI: 10.1002/jeo2.12102] [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: 02/27/2024] [Revised: 06/06/2024] [Accepted: 06/23/2024] [Indexed: 07/27/2024] Open
Abstract
Background Digital templating software can be used for preoperative implant size prediction in total knee arthroplasty (TKA). However, the accuracy of its prediction is reported to be low, and the impact of radiograph quality is unclear. Purpose To investigate on the application of lateral knee radiograph quality criteria for knee rotation (KR) and knee abduction/adduction (KA) and their impact on the accuracy of final implant size prediction achieved by preoperative digital templating for TKA. Methods A total of 191 radiographs of patients undergoing TKA were allocated into four groups according to their KR as measured at the posterior femoral condyles and their KA as measured at the distal femoral condyles on lateral knee radiographs: group A (KR ≤ 5 mm, KA ≤ 5 mm), B1 (KR > 5 mm, KA ≤ 5 mm), B2 (KR ≤ 5 mm, KA > 5 mm) and B3 (KR > 5 mm, KA > 5 mm). Preoperative templating of femoral and tibial implant size using digital templating software was carried out by two observers. Correlation coefficients (CCs) between planned and final implant size, percentage of cases with planned to final size match as well as percentage of cases within ±1 and ±2 of planned to final size were reported according to groups. Results Group A showed the highest percentage of cases with matching planned to final femoral implant size (45%) and the highest percentage of cases with ±1 planned to final implant size (86%) as compared to B1 (match 28%, ±1 84%), B2 (match 41%, ±1 84%) and B3 (match 35%, ±1 78%). CCs for planned to final implant size were reported at >0.75 in all groups. No statistically significant difference in the CCs of planned to final implant size amongst groups was found. Conclusion The accuracy of implant size prediction achieved by preoperative digital templating for TKA is neither affected by KR nor KA on lateral knee radiographs. Level of evidence Level III.
Collapse
Affiliation(s)
- Lorenz Pichler
- Charité—Universitätsmedizin BerlinCentrum für Muskuloskeletale ChirurgieBerlinGermany
| | - Leonhard Klein
- Charité—Universitätsmedizin BerlinCentrum für Muskuloskeletale ChirurgieBerlinGermany
| | - Carsten F. Perka
- Charité—Universitätsmedizin BerlinCentrum für Muskuloskeletale ChirurgieBerlinGermany
| | - Clemens Gwinner
- Charité—Universitätsmedizin BerlinCentrum für Muskuloskeletale ChirurgieBerlinGermany
| | - Moses K. D. El Kayali
- Charité—Universitätsmedizin BerlinCentrum für Muskuloskeletale ChirurgieBerlinGermany
| |
Collapse
|
4
|
Chai Y, Boudali AM, Jenkins E, Maes V, Walter WL. Advances in imaging for pre-surgical planning in hip resurfacing arthroplasty. Orthop Traumatol Surg Res 2024:103908. [PMID: 38768810 DOI: 10.1016/j.otsr.2024.103908] [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: 04/30/2024] [Accepted: 05/15/2024] [Indexed: 05/22/2024]
Abstract
BACKGROUND Accurate preoperative templating is essential for the success of hip resurfacing arthroplasty (HRA). While digital radiograph is currently considered the gold standard, stereoradiograph and CT converted 3D methods have shown promising results. However, there is no consensus in the literature regarding the preferred modality for HRA templating, and angular measurements are often overlooked. Thus, this study aimed to: (1) compare the performances of different modality in implant sizing and angle measurements, (2) evaluate the measurement reproducibility, (3) assess the impact of severe osteoarthritis on femoral head sizing, and (4) based on the analysis above, explore the optimal imaging and planning strategy for HRA. HYPOTHESIS An optimal imaging modality exists for HRA planning regarding implant sizing and angular measurements. MATERIALS AND METHODS Preoperative imaging data from seventy-seven HRA surgeries were collected. Three raters performed templating using digital radiograph, stereoradiograph, and CT converted 3D models. Measurements for femoral head size, neck-shaft angle, and calcar-shaft angle were obtained. The femoral head sizing was compared to the intraoperative clinical decision. The reproducibility of measurements was assessed using the intraclass correlation coefficient (ICC). Correlations were examined between sizing disagreement and osteoarthritis grade (Tonnis Classification). RESULTS Digital radiograph, stereoradiograph, and 3D techniques predicted one size off target in 27/77 (35%), 49/70 (70%), and 75/77 (97%) of cases, respectively, corresponding to 1.8±1.6 (0 to 5.67), 0.9±0.7 (0 to 2.67), and 0.4±0.4 (0 to 1.67) sizes off target, indicating statistically significant differences among all three modalities, with p-values all below 0.01. There were no statistically significant differences among the different modalities for angular measurements. Measurements showed moderate to excellent reproducibility (ICC=0.628-0.955). High-grade osteoarthritis did not impact image sizing in any modality (r=0.08-0.22, all p>0.05). DISCUSSION CT converted 3D models were more accurate for implant sizing in HRA, but did not significantly outperform other modalities in angular measurements. Given the high costs and increased radiation exposure associated with CT, the study recommended using CT scans selectively, particularly for precise femoral head sizing, while alternative imaging methods can be effectively used for angular measurements. LEVEL OF EVIDENCE III; retrospective comparative diagnostic study.
Collapse
Affiliation(s)
- Yuan Chai
- The University of Sydney, Sydney Musculoskeletal Health and The Kolling Institute, Northern Clinical School, Faculty of Medicine and Health and the Northern Sydney Local Health District, Level 10, 10 Westbourne St, St. Leonards, NSW, 2064, Australia; Institute of Future Health, South China University of Technology, 777 Xingyedadao Avenue, Panyu District, Guangzhou, Guangdong Province, 511442, China.
| | - A Mounir Boudali
- The University of Sydney, Sydney Musculoskeletal Health and The Kolling Institute, Northern Clinical School, Faculty of Medicine and Health and the Northern Sydney Local Health District, Level 10, 10 Westbourne St, St. Leonards, NSW, 2064, Australia
| | - Evan Jenkins
- Northern Clinical School, Faculty of Medicine and Health, University of Sydney, 10 Westbourne St, St. Leonards, NSW, 2064, Australia
| | - Vincent Maes
- Tom Reeve Academic Surgical Clinic, Department of Orthopaedics and Traumatic Surgery, Royal North Shore Hospital, 10 Westbourne St, St. Leonards, NSW, 2064, Australia; University Hospitals Leuven, Department of Orthopaedic Surgery, Herestraat 49, Leuven, 3000, Belgium
| | - William L Walter
- The University of Sydney, Sydney Musculoskeletal Health and The Kolling Institute, Northern Clinical School, Faculty of Medicine and Health and the Northern Sydney Local Health District, Level 10, 10 Westbourne St, St. Leonards, NSW, 2064, Australia; Tom Reeve Academic Surgical Clinic, Department of Orthopaedics and Traumatic Surgery, Royal North Shore Hospital, 10 Westbourne St, St. Leonards, NSW, 2064, Australia
| |
Collapse
|
5
|
Bergemann R, Roytman GR, Ani L, Ramji AF, Leslie MP, Tommasini SM, Wiznia DH. The feasibility of a novel 3D-Printed patient specific cutting guide for extended trochanteric osteotomies. 3D Print Med 2024; 10:7. [PMID: 38427157 PMCID: PMC10905807 DOI: 10.1186/s41205-024-00204-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 01/29/2024] [Indexed: 03/02/2024] Open
Abstract
BACKGROUND The extended trochanteric osteotomy (ETO) is a surgical technique utilized to expose the intramedullary canal of the proximal femur, protect the soft tissues and promote reliable healing. However, imprecise execution of the osteotomy can lead to fracture, soft tissue injury, non-union, and unnecessary morbidity. We developed a technique to create patient specific, 3D-printed cutting guides to aid in accurate positioning of the ETO and improve osteotomy quality and outcomes. METHODS Patient specific cutting guides were created based on CT scans using Synopysis Simpleware ScanIP and Solidworks. Custom 3D printed cutting guides were tested on synthetic femurs with foam cortical shells and on cadaveric femurs. To confirm accuracy of the osteotomies, dimensions of the performed osteotomies were compared to the virtually planned osteotomies. RESULTS Use of the patient specific ETO cutting guides resulted in successful osteotomies, exposing the femoral canal and the femoral stem both in synthetic sawbone and cadaveric testing. In cadaveric testing, the guides allowed for osteotomies without fracture and cuts made using the guide were accurate within 6 percent error from the virtually planned osteotomy. CONCLUSION The 3D-printed patient specific cutting guides used to aid in ETOs proved to be accurate. Through the iterative development of cutting guides, we found that a simple design was key to a reliable and accurate guide. While future clinical trials in human subjects are needed, we believe our custom 3D printed cutting guide design to be effective at aiding in performing ETOs for revision total hip arthroplasty surgeries.
Collapse
Affiliation(s)
- Reza Bergemann
- Orthopaedics and Rehabilitation, Yale School of Medicine, Yale University, 333 Cedar St. FMB 5, New Haven, CT, 06511, USA.
| | - Gregory R Roytman
- Orthopaedics and Rehabilitation, Yale School of Medicine, Yale University, 333 Cedar St. FMB 5, New Haven, CT, 06511, USA
- Biomedical Engineering, Yale School of Engineering and Applied Sciences, Yale University, New Haven, USA
| | - Lidia Ani
- Orthopaedics and Rehabilitation, Yale School of Medicine, Yale University, 333 Cedar St. FMB 5, New Haven, CT, 06511, USA
| | - Alim F Ramji
- Orthopaedics and Rehabilitation, Yale School of Medicine, Yale University, 333 Cedar St. FMB 5, New Haven, CT, 06511, USA
| | - Michael P Leslie
- Orthopaedics and Rehabilitation, Yale School of Medicine, Yale University, 333 Cedar St. FMB 5, New Haven, CT, 06511, USA
| | - Steven M Tommasini
- Orthopaedics and Rehabilitation, Yale School of Medicine, Yale University, 333 Cedar St. FMB 5, New Haven, CT, 06511, USA
- Biomedical Engineering, Yale School of Engineering and Applied Sciences, Yale University, New Haven, USA
| | - Daniel H Wiznia
- Orthopaedics and Rehabilitation, Yale School of Medicine, Yale University, 333 Cedar St. FMB 5, New Haven, CT, 06511, USA
- Mechanical Engineering and Material Sciences, Yale School of Engineering and Applied Science, Yale University, New Haven, CT, USA
| |
Collapse
|
6
|
Mancino F, Fontalis A, Magan A, Plastow R, Haddad FS. The Value of Computed Tomography Scan in Three-dimensional Planning and Intraoperative Navigation in Primary Total Hip Arthroplasty. Hip Pelvis 2024; 36:26-36. [PMID: 38420736 DOI: 10.5371/hp.2024.36.1.26] [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: 06/15/2023] [Revised: 07/24/2023] [Accepted: 08/10/2023] [Indexed: 03/02/2024] Open
Abstract
Total hip arthroplasty (THA) is a frequently performed procedure; the objective is restoration of native hip biomechanics and achieving functional range of motion (ROM) through precise positioning of the prosthetic components. Advanced three-dimensional (3D) imaging and computed tomography (CT)-based navigation are valuable tools in both the preoperative planning and intraoperative execution. The aim of this study is to provide a thorough overview on the applications of CT scans in both the preoperative and intraoperative settings of primary THA. Preoperative planning using CT-based 3D imaging enables greater accuracy in prediction of implant sizes, leading to enhancement of surgical workflow with optimization of implant inventory. Surgeons can perform a more thorough assessment of posterior and anterior acetabular wall coverage, acetabular osteophytes, anatomical landmarks, and thus achieve more functional implant positioning. Intraoperative CT-based navigation can facilitate precise execution of the preoperative plan, to attain optimal positioning of the prosthetic components to avoid impingement. Medial reaming can be minimized preserving native bone stock, which can enable restoration of femoral, acetabular, and combined offsets. In addition, it is associated with greater accuracy in leg length adjustment, a critical factor in patients' postoperative satisfaction. Despite the higher costs and radiation exposure, which currently limits its widespread adoption, it offers many benefits, and the increasing interest in robotic surgery has facilitated its integration into routine practice. Conducting additional research on ultra-low-dose CT scans and examining the potential for translation of 3D imaging into improved clinical outcomes will be necessary to warrant its expanded application.
Collapse
Affiliation(s)
- Fabio Mancino
- Department of Trauma and Orthopaedic Surgery, University College Hospital, London, United Kingdom
| | - Andreas Fontalis
- Department of Trauma and Orthopaedic Surgery, University College Hospital, London, United Kingdom
| | - Ahmed Magan
- Department of Trauma and Orthopaedic Surgery, University College Hospital, London, United Kingdom
| | - Ricci Plastow
- Department of Trauma and Orthopaedic Surgery, University College Hospital, London, United Kingdom
| | - Fares S Haddad
- Department of Trauma and Orthopaedic Surgery, University College Hospital, London, United Kingdom
| |
Collapse
|
7
|
Moralidou M, Di Laura A, Hothi H, Henckel J, Hart AJ. Cemented or uncemented fixation: Which allows a more acceptable prosthetic femoral version in total hip arthroplasty? J Orthop Surg Res 2023; 18:948. [PMID: 38071336 PMCID: PMC10710710 DOI: 10.1186/s13018-023-04331-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Accepted: 10/29/2023] [Indexed: 12/18/2023] Open
Abstract
BACKGROUND Three-dimensional computed-tomography (3D-CT) planning for primary Total Hip Arthroplasty (THA) typically uses the external femoral surface; as a result, it is difficult to predict the prosthetic femoral version (PFV) for uncemented femoral stems that press-fit to the internal surface of the bone. Cemented fixation allows the surgeon to adjust the version independent of the internal femoral anatomy. We aimed to better understand the effect of the fixation type on PFV. METHODS This was a case series study including a total of 95 consecutive patients (106 hips), who underwent uncemented (n = 81 hips) and cemented (n = 25 hips) primary THA using the posterior approach. The surgeon aimed for a PFV of 20°. Our primary objective was to compare PFV in both groups; our secondary objective was to evaluate the clinical outcomes. RESULTS The mean (± SD) PFV was 13° (± 9°) and 23° (± 8°) for the uncemented and cemented THA groups (P < 0.001), respectively. In the uncemented THA group, 36% of the patients had a PFV of < 10°. In the cemented THA group, this clinically important threshold dropped to 8%. Similarly, the Bland-Altman (BA) plots showed wider 95% limits of agreement for the uncemented group. Satisfactory clinical outcomes were recorded. CONCLUSION We found that the PFV was more clinically acceptable, for the posterior surgical approach, in the cemented group when compared to the uncemented group. Both THA groups reported high variability indicating the need to develop surgical tools to guide the PFV closer to the surgical target.
Collapse
Affiliation(s)
- Maria Moralidou
- Institute of Orthopaedics and Musculoskeletal Science, University College London, Brockley Hill, Stanmore, HA7 4LP, UK
| | - Anna Di Laura
- The Royal National Orthopaedic Hospital NHS Trust, Brockley Hill, Stanmore, HA7 4LP, UK
- Department of Mechanical Engineering, University College London, Torrington Place, London, WC1E 7JE, UK
| | - Harry Hothi
- The Royal National Orthopaedic Hospital NHS Trust, Brockley Hill, Stanmore, HA7 4LP, UK
- Department of Mechanical Engineering, University College London, Torrington Place, London, WC1E 7JE, UK
| | - Johann Henckel
- The Royal National Orthopaedic Hospital NHS Trust, Brockley Hill, Stanmore, HA7 4LP, UK
| | - Alister J Hart
- Institute of Orthopaedics and Musculoskeletal Science, University College London, Brockley Hill, Stanmore, HA7 4LP, UK.
- Cleveland Clinic London Hospital, 33 Grosvenor Pl, London, SW1X 7HY, UK.
| |
Collapse
|
8
|
Trung HP, Sy Quyen NV, Tu NV, Trung DT, Dinh TD. Early outcomes of total hip arthroplasty using point-of-care manufactured patient-specific instruments: a single university hospital's initial experience. BMC Surg 2023; 23:369. [PMID: 38066450 PMCID: PMC10704642 DOI: 10.1186/s12893-023-02281-3] [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: 06/04/2023] [Accepted: 11/29/2023] [Indexed: 12/18/2023] Open
Abstract
BACKGROUND The use of 3D-printed Patient-Specific Instruments (PSI) has been investigated to enhance the postoperative functional results in total hip arthroplasty (THA) and has been recognized as an innovative approach for the optimal alignment of hip implant components. Point-of-care production is gradually becoming the norm for PSI manufacturing. The purpose of this article is to assess the accuracy and safety of PSI for total hip arthroplasty performed at the point-of-care in Vietnam. METHODS 34 THA cases were assessed in this prospective study. A template for the size and orientation of the implant and the design of the PSI was generated using data from preoperative 3D computed tomography (CT) scanning of the lower limb. The principal surgeon determined the implants' position and PSI design directly using the software. The PSI is then produced using a 3D-compatible resin printer in our manufacturing hospital. The PSI, consisting of an acetabulum and a femoral component placed press-fit on the bony surface, guided surgeons to precisely ream the acetabulum and cut the femoral neck according to the pre-planned plane. Postoperative CT scanning was obtained and superimposed onto the 3D model of the implant to evaluate the accuracy of the procedure by comparing the orientation values of the cup and the alignment of the stem between the planned and the actual results. Intra- and postoperative clinical parameters of surgery, including surgical time, intra-operative blood loss, complications, and the first ambulation, were also recorded to evaluate the safety of the surgery. RESULTS The preparation for PSI required an average of 3 days. 94% of cup size and 91% of stem size were correctly selected. The mean values of postoperative inclination and anteversion were 44.2° ± 4.1° and 19.2° ± 5.6°, respectively. 64.7% of cases deviated from planned within the ± 50 range and 94.1% within the ± 10° range. There was no significant statistical difference between the planned and the achieved values of stem anteversion, osteotomy height, and leg length discrepancy (p > 0.05). The average surgical time was 82.5° ± 10.8 min, and the intraoperative blood loss was estimated at 317.7° ± 57.6 ml. 64.7% of patients could walk on the day of surgery. There were no complications reported. CONCLUSIONS The point-of-care manufactured PSI is a useful solution for improving the accuracy of total hip arthroplasty surgery, especially in restoring implant orientation and reducing leg length discrepancy. However, long-term clinical follow-up evaluation is needed to confirm the efficacy and safety of this approach.
Collapse
Affiliation(s)
- Hieu Pham Trung
- Hanoi Medical University, Hanoi, Vietnam
- Center for Orthopedics and Sports Medicine, Vinmec Healthcare System, Hanoi, Vietnam
- 3D Technology in Medicine Center, VinUniversity, Hanoi, Vietnam
| | - Nang Vo Sy Quyen
- Hanoi Medical University, Hanoi, Vietnam
- Center for Orthopedics and Sports Medicine, Vinmec Healthcare System, Hanoi, Vietnam
- 3D Technology in Medicine Center, VinUniversity, Hanoi, Vietnam
| | - Nam Vu Tu
- Center for Orthopedics and Sports Medicine, Vinmec Healthcare System, Hanoi, Vietnam
- 3D Technology in Medicine Center, VinUniversity, Hanoi, Vietnam
| | - Dung Tran Trung
- Center for Orthopedics and Sports Medicine, Vinmec Healthcare System, Hanoi, Vietnam
- 3D Technology in Medicine Center, VinUniversity, Hanoi, Vietnam
| | | |
Collapse
|
9
|
Moralidou M, Di Laura A, Henckel J, Hart AJ. Can version of the proximal femur be used for CT planning uncemented femoral stems? Med Eng Phys 2023; 116:103985. [PMID: 37230697 DOI: 10.1016/j.medengphy.2023.103985] [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: 09/30/2022] [Revised: 04/19/2023] [Accepted: 04/24/2023] [Indexed: 05/27/2023]
Abstract
Three-Dimensional Computed Tomography (3D-CT) planning can predict the prosthetic femoral size in uncemented primary Total Hip Arthroplasty (THA). Correct sizing usually results in optimal varus/valgus femoral alignment; however, its effect on the Prosthetic Femoral Version (PFV) is poorly understood. Most 3D-CT planning systems use Native Femoral Version (NFV) to plan PFV. We aimed to assess the relationship between PFV and NFV in primary uncemented THA using 3D-CT analysis. Pre- and post-operative CT data was retrospectively collected from 73 patients (81 hips) undergoing primary uncemented THA with a straight-tapered stem. 3D-CT models were used to measure PFV and NFV. The clinical outcomes were evaluated. The discrepancy between PFV and NFV was low (<5°) in 43%, moderate (5-10°) in 40%, high (10-15°) in 11% and very high (>15°) in 6% of the cases. We found that NFV is not a useable guide for planning PFV. The 95% limits of agreement were both high at 17° and 15°, respectively. Satisfactory clinical outcomes were recorded. The discrepancy was large enough to recommend against the use of NFV for planning PFV when using straight-tapered uncemented stems. Further work should focus on the internal bony anatomy and the influence of stem design when planning uncemented femoral stems.
Collapse
Affiliation(s)
- Maria Moralidou
- Institute of Orthopaedics and Musculoskeletal Science, University College London, Brockley Hill, Stanmore HA7 4LP, United Kingdom
| | - Anna Di Laura
- The Royal National Orthopaedic Hospital NHS Trust, Brockley Hill, Stanmore HA7 4LP, United Kingdom; Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, United Kingdom
| | - Johann Henckel
- The Royal National Orthopaedic Hospital NHS Trust, Brockley Hill, Stanmore HA7 4LP, United Kingdom
| | - Alister J Hart
- Institute of Orthopaedics and Musculoskeletal Science, University College London, Brockley Hill, Stanmore HA7 4LP, United Kingdom; The Royal National Orthopaedic Hospital NHS Trust, Brockley Hill, Stanmore HA7 4LP, United Kingdom.
| |
Collapse
|
10
|
Moralidou M, Henckel J, Di Laura A, Hart A. Guiding prosthetic femoral version using 3D-printed patient-specific instrumentation (PSI): a pilot study. 3D Print Med 2023; 9:11. [PMID: 37058277 PMCID: PMC10103427 DOI: 10.1186/s41205-023-00168-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 02/17/2023] [Indexed: 04/15/2023] Open
Abstract
BACKGROUND Implantation of the femoral component with suboptimal version is associated with instability of the reconstructed hip joint. High variability of Prosthetic Femoral Version (PFV) has been reported in primary Total Hip Arthroplasty (THA). Three-dimensional (3D) Patient-Specific Instrumentation (PSI) has been recently developed and may assist in delivering a PFV within the intended range. We performed a pilot study to better understand whether the intra-operative use of a novel PSI guide, designed to deliver a PFV of 20°, results in the target range of PFV in primary cemented THA. METHODS We analysed post-operative Computed-Tomography (CT) data of two groups of patients who underwent primary cemented THA through posterior approach; 1. A group of 11 patients (11 hips) for which the surgeon used an intra-operative 3D-printed stem positioning guide (experimental) 2. A group of 24 patients (25 hips) for which the surgeon did not use the guide (control). The surgeon aimed for a PFV of 20°, and therefore the guide was designed to indicate the angle at which the stem was positioned intra-operatively. PFV angles were measured using the post-operative 3D-CT models of the proximal femurs and prosthetic components in both groups. Our primary objective was to compare the PFV in both groups. Our secondary objective was to evaluate the clinical outcome. RESULTS Mean (± SD) values for the PFV was 21.3° (± 4.6°) and 24.6° (± 8.2°) for the experimental and control groups respectively. In the control group, 20% of the patients reported a PFV outside the intended range of 10° to 30° anteversion. In the experimental group, this percentage dropped to 0%. Satisfactory clinical outcome was recorded in both groups. CONCLUSION The intra-operative use of a PSI PFV guide helped the surgeon avoid suboptimal PFV in primary cemented THA. Further studies are needed to evaluate if the PSI guide directly contributes to a better clinical outcome.
Collapse
Affiliation(s)
- Maria Moralidou
- Institute of Orthopaedics and Musculoskeletal Science, University College London, Stanmore, UK
| | - Johann Henckel
- Royal National Orthopaedic Hospital NHS Trust, Stanmore, UK
| | - Anna Di Laura
- Royal National Orthopaedic Hospital NHS Trust, Stanmore, UK.
- Department of Mechanical Engineering, University College London, London, UK.
| | - Alister Hart
- Institute of Orthopaedics and Musculoskeletal Science, University College London, Stanmore, UK
- Royal National Orthopaedic Hospital NHS Trust, Stanmore, UK
| |
Collapse
|
11
|
Portnoy Y, Koren J, Khoury A, Factor S, Dadia S, Ran Y, Benady A. Three-dimensional technologies in presurgical planning of bone surgeries: current evidence and future perspectives. Int J Surg 2023; 109:3-10. [PMID: 36799780 PMCID: PMC10389328 DOI: 10.1097/js9.0000000000000201] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 11/20/2022] [Indexed: 02/18/2023]
Abstract
BACKGROUND The recent development of three-dimensional (3D) technologies introduces a novel set of opportunities to the medical field in general, and specifically to surgery. The preoperative phase has proven to be a critical factor in surgical success. Utilization of 3D technologies has the potential to improve preoperative planning and overall surgical outcomes. In this narrative review article, the authors describe existing clinical data pertaining to the current use of 3D printing, virtual reality, and augmented reality in the preoperative phase of bone surgery. METHODS The methodology included keyword-based literature search in PubMed and Google Scholar for original articles published between 2014 and 2022. After excluding studies performed in nonbone surgery disciplines, data from 61 studies of five different surgical disciplines were processed to be included in this narrative review. RESULTS Among the mentioned technologies, 3D printing is currently the most advanced in terms of clinical use, predominantly creating anatomical models and patient-specific instruments that provide high-quality operative preparation. Virtual reality allows to set a surgical plan and to further simulate the procedure via a 2D screen or head mounted display. Augmented reality is found to be useful for surgical simulation upon 3D printed anatomical models or virtual phantoms. CONCLUSIONS Overall, 3D technologies are gradually becoming an integral part of a surgeon's preoperative toolbox, allowing for increased surgical accuracy and reduction of operation time, mainly in complex and unique surgical cases. This may eventually lead to improved surgical outcomes, thereby optimizing the personalized surgical approach.
Collapse
Affiliation(s)
- Yotam Portnoy
- First Faculty of Medicine, Charles University in Prague, Prague, Czechia
| | - Jonathan Koren
- First Faculty of Medicine, Charles University in Prague, Prague, Czechia
| | - Amal Khoury
- Sackler School of Medicine, Tel Aviv University
- Division of Orthopaedic Surgery
| | - Shai Factor
- Sackler School of Medicine, Tel Aviv University
- Division of Orthopaedic Surgery
| | - Solomon Dadia
- Sackler School of Medicine, Tel Aviv University
- Levin Center of 3D Printing and Surgical Innovation
- National Unit of Orthopedic Oncology
| | - Yuval Ran
- Sackler School of Medicine, Tel Aviv University
- Office of the Deputy Medical Manager, Tel Aviv Medical Center, Tel Aviv, Israel
| | - Amit Benady
- Sackler School of Medicine, Tel Aviv University
- Division of Orthopaedic Surgery
- Levin Center of 3D Printing and Surgical Innovation
| |
Collapse
|
12
|
Accuracy of a Three-Dimensional (3D)-Printed Patient-Specific (PS) Femoral Osteotomy Guide: A Computed Tomography (CT) Study. Bioengineering (Basel) 2022; 9:bioengineering9110667. [PMID: 36354578 PMCID: PMC9687720 DOI: 10.3390/bioengineering9110667] [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: 09/21/2022] [Revised: 11/02/2022] [Accepted: 11/03/2022] [Indexed: 11/11/2022] Open
Abstract
Femoral neck osteotomy creates a critical anatomical landmark for surgeons performing primary Total Hip Arthroplasty (THA); it affects the final height and position of the femoral component. Patient Specific Instrumentation (PSI) has been developed to guide the osteotomy. We aimed to assess the accuracy of a patient-specific (PS) femoral osteotomy guide in primary THA using three-dimensional (3D) computed tomography (CT) analysis. We included pre- and post-operative CT data of 103 THAs. All patients underwent 3D planning to define the optimal femoral neck osteotomy level. Our primary objective was to quantify the discrepancy between the achieved and planned osteotomy level; our secondary objective was to evaluate the clinical outcome. The median (Interquartile Range—IQR) discrepancy between the achieved and planned osteotomy level was 0.3 mm (−1 mm to 2 mm). We found a strong positive correlation between the planned and achieved osteotomy level (R2 = 0.9, p < 0.001). A satisfactory clinical outcome was recorded. Our findings suggest that surgeons can use 3D-printed PS guides to achieve a femoral neck osteotomy with a high level of accuracy to the plan.
Collapse
|
13
|
Chen JB, Diane A, Lyman S, Chiu YF, Blevins JL, Westrich GH. Predicting Implant Size in Total Hip Arthroplasty. Arthroplast Today 2022; 15:210-214.e0. [PMID: 35774896 PMCID: PMC9237279 DOI: 10.1016/j.artd.2022.02.018] [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: 12/20/2021] [Accepted: 02/14/2022] [Indexed: 11/25/2022] Open
Abstract
Background Efficient resource management is becoming more important as the demand for total hip arthroplasty (THA) increases. The purpose of this study is to evaluate the ability of linear regression and Bayesian statistics in predicting implant size for THA using patient demographic variables. Material and methods A retrospective, single-institution joint-replacement registry review was performed on patients who underwent primary THA from 2005 to 2019. Demographic information was obtained along with primary THA implant data. A total of 11,730 acetabular and 8536 femoral components were included. A multivariable regression model was created on a training cohort of 80% of the sample and applied to the validation cohort (remaining 20%). Bayesian posterior probability methods were applied to the training cohort and then tested in the validation cohort to determine the 1%, 5%, and 10% error tolerance thresholds. Results The most predictive regression model included height, weight, and sex (cup: R2 = 0.57, all P < .001; stem mediolateral size [M/L]: R2 = 0.32, all P < .001). Removing weight had a minimal effect and resulted in a more parsimonious model (cup: R2 = 0.56, all P < .001; stem M/L: R2 = 0.32, all P < .001). Applying the posterior probability estimate to the validation cohort in the Bayesian model using height, weight, and sex demonstrated high accuracy in predicting the range of required implant sizes (95.3% cup and 90.4% stem M/L size). Conclusion Implant size in THA is correlated with demographic variables to accurately predict implant size using Bayesian modeling. Predictive models such as linear regression and Bayesian modeling can be used to improve operating room efficiency, supply chain inventory management, and decrease costs associated with THA.
Collapse
|
14
|
Wong RMY, Wong PY, Liu C, Chung YL, Wong KC, Tso CY, Chow SKH, Cheung WH, Yung PSH, Chui CS, Law SW. 3D printing in orthopaedic surgery: a scoping review of randomized controlled trials. Bone Joint Res 2021; 10:807-819. [PMID: 34923849 PMCID: PMC8696518 DOI: 10.1302/2046-3758.1012.bjr-2021-0288.r2] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Aims The use of 3D printing has become increasingly popular and has been widely used in orthopaedic surgery. There has been a trend towards an increasing number of publications in this field, but existing literature incorporates limited high-quality studies, and there is a lack of reports on outcomes. The aim of this study was to perform a scoping review with Level I evidence on the application and effectiveness of 3D printing. Methods A literature search was performed in PubMed, Embase, and Web of Science databases. The keywords used for the search criteria were ((3d print*) OR (rapid prototyp*) OR (additive manufactur*)) AND (orthopaedic). The inclusion criteria were: 1) use of 3D printing in orthopaedics, 2) randomized controlled trials, and 3) studies with participants/patients. Risk of bias was assessed with Cochrane Collaboration Tool and PEDro Score. Pooled analysis was performed. Results Overall, 21 studies were included in our study with a pooled total of 932 participants. Pooled analysis showed that operating time (p < 0.001), blood loss (p < 0.001), fluoroscopy times (p < 0.001), bone union time (p < 0.001), pain (p = 0.040), accuracy (p < 0.001), and functional scores (p < 0.001) were significantly improved with 3D printing compared to the control group. There were no significant differences in complications. Conclusion 3D printing is a rapidly developing field in orthopaedics. Our findings show that 3D printing is advantageous in terms of operating time, blood loss, fluoroscopy times, bone union time, pain, accuracy, and function. The use of 3D printing did not increase the risk of complications. Cite this article: Bone Joint Res 2021;10(12):807–819.
Collapse
Affiliation(s)
- Ronald Man Yeung Wong
- Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong, Hong Kong.,Department of Orthopaedics & Traumatology, Prince of Wales Hospital, Hong Kong, Hong Kong
| | - Pui Yan Wong
- Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Chaoran Liu
- Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Yik Lok Chung
- Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Kwok Chuen Wong
- Department of Orthopaedics & Traumatology, Prince of Wales Hospital, Hong Kong, Hong Kong
| | - Chi Yin Tso
- Department of Orthopaedics & Traumatology, Prince of Wales Hospital, Hong Kong, Hong Kong
| | - Simon Kwoon-Ho Chow
- Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Wing-Hoi Cheung
- Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Patrick Shu-Hang Yung
- Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong, Hong Kong.,Department of Orthopaedics & Traumatology, Prince of Wales Hospital, Hong Kong, Hong Kong
| | - Chun Sing Chui
- Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Sheung Wai Law
- Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong, Hong Kong.,Department of Orthopaedics & Traumatology, Prince of Wales Hospital, Hong Kong, Hong Kong
| |
Collapse
|
15
|
Jiang M, Coles-Black J, Chen G, Alexander M, Chuen J, Hardidge A. 3D Printed Patient-Specific Complex Hip Arthroplasty Models Streamline the Preoperative Surgical Workflow: A Pilot Study. Front Surg 2021; 8:687379. [PMID: 34513912 PMCID: PMC8427196 DOI: 10.3389/fsurg.2021.687379] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 07/28/2021] [Indexed: 12/05/2022] Open
Abstract
Introduction: Surgical planning for complex total hip arthroplasty (THA) often presents a challenge. Definitive plans can be difficult to decide upon, requiring unnecessary equipment to be ordered and a long theatre list booked. We present a pilot study utilising patient-specific 3D printed models as a method of streamlining the pre-operative planning process. Methods: Complex patients presenting for THA were referred to the research team. Patient-specific 3D models were created from routine Computed Tomography (CT) imaging. Simulated surgery was performed to guide prosthesis selection, sizing and the surgical plan. Results: Seven patients were referred for this pilot study, presenting with complex conditions with atypical anatomy. Surgical plans provided by the 3D models were more detailed and accurate when compared to 2D CT and X ray imaging. Streamlined equipment selection was of great benefit, with augments avoided post simulation in three cases. The ability to tackle complex surgical problems outside of the operating theatre also flagged potential complications, while also providing teaching opportunities in a low risk environment. Conclusion: This study demonstrated that 3D printed models can improve the surgical plan and streamline operative logistics. Further studies investigating the optimal 3D printing material and workflow, along with cost-benefit analyses are required before this process is ready for routine use.
Collapse
Affiliation(s)
- Michael Jiang
- 3dMedLab, Austin Health, The University of Melbourne, Parkville, VIC, Australia
- Department of Surgery, Austin Health, The University of Melbourne, Heidelberg, VIC, Australia
| | - Jasamine Coles-Black
- 3dMedLab, Austin Health, The University of Melbourne, Parkville, VIC, Australia
- Department of Surgery, Austin Health, The University of Melbourne, Heidelberg, VIC, Australia
| | - Gordon Chen
- 3dMedLab, Austin Health, The University of Melbourne, Parkville, VIC, Australia
| | - Matthew Alexander
- Department of Surgery, Austin Health, The University of Melbourne, Heidelberg, VIC, Australia
| | - Jason Chuen
- 3dMedLab, Austin Health, The University of Melbourne, Parkville, VIC, Australia
- Department of Surgery, Austin Health, The University of Melbourne, Heidelberg, VIC, Australia
| | - Andrew Hardidge
- Department of Surgery, Austin Health, The University of Melbourne, Heidelberg, VIC, Australia
| |
Collapse
|