1
|
Wang D, Ye Y, Liang X, Li K, Huang W. Enhancing total knee arthroplasty outcomes: the role of individualized femoral sagittal alignment in robotic-assisted surgery - A randomized controlled trial. J Orthop Surg Res 2024; 19:558. [PMID: 39261881 PMCID: PMC11389516 DOI: 10.1186/s13018-024-05027-w] [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: 04/08/2024] [Accepted: 08/22/2024] [Indexed: 09/13/2024] Open
Abstract
BACKGROUND Optimal sagittal alignment of the femoral prosthesis is critical to the success of total knee arthroplasty (TKA). While robotic-assisted TKA can improve alignment accuracy, the efficacy of default femoral alignment versus individualized alignment remains under scrutiny. This study aimed to compare the differences in prosthetic alignment, anatomical restoration, and clinical outcomes between individualized femoral sagittal alignment and default sagittal alignment in robotic-assisted TKA. METHODS In a prospective randomised controlled trial, 113 patients (120 knees) underwent robotic-assisted TKA were divided into two groups: 61 with individualized femoral flexion (individualized alignment group) and 59 with default 3-5° flexion (default alignment group). The individualized alignment was based on the distal femoral sagittal anteverted angle (DFSAA), defined as the angle between the mechanical and distal anatomical axes of the femur. The radiographic and clinical outcomes were compared. RESULTS Despite similar postoperative femoral flexion angles between groups (P = 0.748), the individualized alignment group exhibited significantly lower incidences of femoral prosthesis extension and higher rates of optimal 0-3° prosthesis flexion (9.8% vs. 27.1%, P = 0.014,78.7% vs. 55.9%, p = 0.008, respectively). The individualized alignment group also demonstrated more favourable changes in sagittal anatomy, with higher maintenance of postoperative anterior femoral offset within 1 mm (54.1% vs. 33.9%, P = 0.026) and posterior condylar offset within 1 mm and 2 mm (44.3% vs. 25.4%, p = 0.031,73.8% vs. 50.8%, p = 0.010, respectively). Although slight improvement in the Hospital for Special Surgery Knee Score (HSS) at three months was observed (P = 0.045), it did not reach a minimal clinically important difference. CONCLUSION Individualized tailoring of femoral sagittal alignment in robotic-assisted total knee arthroplasty (TKA) enhances prosthetic alignment and anatomical restoration, suggesting potential improvements in postoperative outcomes.
Collapse
Affiliation(s)
- Dehua Wang
- Department of Orthopaedics, the First Affiliated Hospital of Chongqing Medical University, 1 Youyi Road, Yuanjiagang Yuzhong District, Chongqing, 400016, China
- Orthopaedic Laboratory of Chongqing Medical University, Chongqing, China
| | - Yu Ye
- Department of Orthopaedics, The Second People's Hospital of Yubei District, Chongqing, China
| | - Xi Liang
- Department of Orthopaedics, the First Affiliated Hospital of Chongqing Medical University, 1 Youyi Road, Yuanjiagang Yuzhong District, Chongqing, 400016, China
- Orthopaedic Laboratory of Chongqing Medical University, Chongqing, China
| | - Ke Li
- Department of Orthopaedics, the First Affiliated Hospital of Chongqing Medical University, 1 Youyi Road, Yuanjiagang Yuzhong District, Chongqing, 400016, China.
- Orthopaedic Laboratory of Chongqing Medical University, Chongqing, China.
| | - Wei Huang
- Department of Orthopaedics, the First Affiliated Hospital of Chongqing Medical University, 1 Youyi Road, Yuanjiagang Yuzhong District, Chongqing, 400016, China.
- Orthopaedic Laboratory of Chongqing Medical University, Chongqing, China.
| |
Collapse
|
2
|
MacAskill M, Peluso R, Lash J, Hewett TE, Bullock M, Caughran A. A Three-dimensional Comparison of Pre- and Post-component Position in a Series of Off-label Robotic-assisted Revision Total Knee Arthroplasties. Arthroplast Today 2024; 25:101310. [PMID: 38229867 PMCID: PMC10788208 DOI: 10.1016/j.artd.2023.101310] [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: 07/04/2023] [Revised: 11/09/2023] [Accepted: 11/19/2023] [Indexed: 01/18/2024] Open
Abstract
Background The application of robotic-assisted arthroplasty in revision knee scenarios continues to evolve. This study compares the pre- and post-revision implant positions in series of revision total knee arthroplasties (TKA) using a robotic arm system. Methods Twenty-five consecutive off-label robotic-assisted revision TKA were performed. After virtual revision femoral and tibial components were positioned to achieve "balanced" medial and lateral flexion and extension gaps, the existing primary implants (PI) were removed, and bone cuts were executed with the robotic arm system. Preoperative coronal, sagittal, and axial position of the PI was compared to the final planned positions of the robotic revision implants (RRI) for each subject. A repeated measures ANOVA using the absolute difference in millimeters and degrees between the PI and RRI orientation was completed. Results Intra-operatively, the virtual gaps were balanced within the planning software followed by successful execution of the plan. There was a statistically significant difference between posterior condylar offset and tibial component positioning for RRI compared to PI. There was no difference between the distal femoral component values between PI and RRI. Conclusions The sagittal alignment of the revision implants, specifically the femoral posterior condylar offset and tibial component slope, are statistically significant considerations for a stable revision TKA with off-label use of a robotic-arm system. Other potential benefits may include appropriate implant sizing which can affect the resultant ligamentous tension important for a functional revision TKA. Future research and software iterations will be needed to determine the overall accuracy and utility of robotic-assisted revision TKA.
Collapse
Affiliation(s)
- Micah MacAskill
- Department of Orthopaedics, Marshall University Joan C. Edwards School of Medicine, Huntington, WV, USA
| | - Richard Peluso
- Department of Orthopaedics, Marshall University Joan C. Edwards School of Medicine, Huntington, WV, USA
| | - Jonathan Lash
- Department of Orthopaedics, Marshall University Joan C. Edwards School of Medicine, Huntington, WV, USA
| | - Timothy E. Hewett
- Department of Orthopaedics, Marshall University Joan C. Edwards School of Medicine, Huntington, WV, USA
| | - Matthew Bullock
- Department of Orthopaedics, Marshall University Joan C. Edwards School of Medicine, Huntington, WV, USA
| | - Alexander Caughran
- Department of Orthopaedics, Marshall University Joan C. Edwards School of Medicine, Huntington, WV, USA
| |
Collapse
|
3
|
Yang Y, Jiang L, Zhou X, Zhou X, Chen H, Chen Z. Robotic-assisted total knee arthroplasty improves implant position and early functional recovery for the knee with severe varus/valgus deformity. BMC Musculoskelet Disord 2024; 25:92. [PMID: 38267884 PMCID: PMC10809628 DOI: 10.1186/s12891-024-07203-9] [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: 07/21/2023] [Accepted: 01/13/2024] [Indexed: 01/26/2024] Open
Abstract
PURPOSE Robotic-assisted total knee arthroplasty (r-TKA) facilitates precise bone resection and lower limb alignment, yet accuracy and functional recovery for severe varus/valgus deformity is not well-documented. The aim of study was to investigate whether r-TKA improves implant alignment in the coronal and sagittal view and early functional recovery compared to conventional TKA(c-TKA). METHODS This comparative study included 86 patients with symptomatic knee arthritis who underwent primary TKA at our institution between 1st May and 31th November 2021. Radiological parameters evaluated included hip-knee-ankle angle (HKAA), femoral varus-valgus angle (FVVA), tibial varus-valgus angle (TVVA), posterior tibial slope angle (PTSA), femoral sagittal angle (FSA), posterior condylar offset ratio, and Insall-Salvati index. Operative time, stay length, and complications were reviewed from patient records. The hospital for special surgery (HSS), Visual Analogue Scale (VAS) and knee joint motion range were evaluated at the six-month follow-up. RESULTS The c-TKA and r-TKA groups had no significant differences in HKAA (179.73 ± 3.76°, range: 172.10-188.90° vs. 180.53 ± 2.91°, range: 173.30-188.32°, p = 0.277), FVVA (96.13 ± 2.61°, range: 90.27-101.52° vs. 96.38 ± 2.23°, range: 90.98-100.95°, p = 0.636), and TVVA (88.74 ± 2.03°, range: 83.75-92.74° vs. 89.43 ± 1.83°, range: 85.32-94.15°, p = 1.000). Outlier of mechanical alignment incidence (> 3°) was significantly lower in r-TKA compared with c-TKA, 17.50% (7/40) vs. 41.30% (19/46), (p = 0.017). PTSA of r-TKA remained significantly lower than c-TKA (p = 0.009) in mild-deformity patients. For severe varus/valgus deformity, r-TKA had a significantly lesser HKAA-outlier incidence (p = 0.025), PTSA-outlier incidence (p = 0.019), and lower PTSA (p < 0.001) compared with c-TKA. The r-TKA functional outcome was better than c-TKA regarding HSS (93.12 ± 1.97, range: 90-95, 95%CI:92.11-94.13 vs. 91.33 ± 2.50, range: 85-95, 95%CI:90.20-92.69, p = 0.036), and VAS (0.24 ± 0.44, range:0-1 vs. 0.72 ± 0.75, range:0-2, p = 0.026), knee joint flexion (118.53° ± 8.06, range: 105-130°, 95%CI:114.39-122.67° vs. 112.22 ± 8.09°, range: 100-130°, 95%CI:108.20-116.24° ,p = 0.027) for severe varus/valgus deformity. CONCLUSION r-TKA improved lower-limb coronal alignment, sagittal implant position, and early functional recovery for patients with severe varus/valgus deformity of the knee. r-TKA did not confer substantial advantages over c-TKA in both radiological and clinical outcomes for the mild varus/valgus deformity.
Collapse
Affiliation(s)
- Yang Yang
- Department of Orthopedics, Taizhou Hospital of Zhejiang Province, Affiliated to Wenzhou Medical University, No. 150 Ximen Street, Linhai City, 317000, Zhejiang Province, China
| | - Lingjun Jiang
- Department of Orthopedics, Taizhou Hospital of Zhejiang Province, Affiliated to Wenzhou Medical University, No. 150 Ximen Street, Linhai City, 317000, Zhejiang Province, China
| | - Xiaoxiao Zhou
- Department of Orthopedics, Shanghai University of Medicine & Health Sciences Affiliated Zhoupu hospital, Shanghai, China
| | - Xiaobo Zhou
- Department of Orthopedics, Taizhou Hospital of Zhejiang Province, Affiliated to Wenzhou Medical University, No. 150 Ximen Street, Linhai City, 317000, Zhejiang Province, China
| | - Haixiao Chen
- Department of Orthopedics, Taizhou Hospital of Zhejiang Province, Affiliated to Wenzhou Medical University, No. 150 Ximen Street, Linhai City, 317000, Zhejiang Province, China.
| | - Zhongyi Chen
- Department of Orthopedics, Taizhou Hospital of Zhejiang Province, Affiliated to Wenzhou Medical University, No. 150 Ximen Street, Linhai City, 317000, Zhejiang Province, China.
| |
Collapse
|
4
|
Lee JA, Koh YG, Kim PS, Park JH, Kang KT. Effect of surface matching mismatch of focal knee articular prosthetic on tibiofemoral contact stress using finite element analysis. Bone Joint Res 2023; 12:497-503. [PMID: 37582511 PMCID: PMC10427223 DOI: 10.1302/2046-3758.128.bjr-2023-0010.r1] [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] [Indexed: 08/17/2023] Open
Abstract
Aims Focal knee arthroplasty is an attractive alternative to knee arthroplasty for young patients because it allows preservation of a large amount of bone for potential revisions. However, the mechanical behaviour of cartilage has not yet been investigated because it is challenging to evaluate in vivo contact areas, pressure, and deformations from metal implants. Therefore, this study aimed to determine the contact pressure in the tibiofemoral joint with a focal knee arthroplasty using a finite element model. Methods The mechanical behaviour of the cartilage surrounding a metal implant was evaluated using finite element analysis. We modelled focal knee arthroplasty with placement flush, 0.5 mm deep, or protruding 0.5 mm with regard to the level of the surrounding cartilage. We compared contact stress and pressure for bone, implant, and cartilage under static loading conditions. Results Contact stress on medial and lateral femoral and tibial cartilages increased and decreased, respectively, the most and the least in the protruding model compared to the intact model. The deep model exhibited the closest tibiofemoral contact stress to the intact model. In addition, the deep model demonstrated load sharing between the bone and the implant, while the protruding and flush model showed stress shielding. The data revealed that resurfacing with a focal knee arthroplasty does not cause increased contact pressure with deep implantation. However, protruding implantation leads to increased contact pressure, decreased bone stress, and biomechanical disadvantage in an in vivo application. Conclusion These results show that it is preferable to leave an edge slightly deep rather than flush and protruding.
Collapse
Affiliation(s)
- Jin-Ah Lee
- Department of Mechanical Engineering, Yonsei University, Seoul, South Korea
| | - Yong-Gon Koh
- Department of Orthopaedic Surgery, Yonsei Sarang Hospital, Seoul, South Korea
| | - Paul S. Kim
- Department of Orthopaedic Surgery, The Bone Hospital, Seoul, South Korea
| | - Joon-Hee Park
- Department of Anesthesiology & Pain Medicine, Hallym University College of Medicine and Kangdong Sacred Heart Hospital, Seoul, South Korea
| | - Kyoung-Tak Kang
- Department of Mechanical Engineering, Yonsei University, Seoul, South Korea
| |
Collapse
|
5
|
Connolly P, Coombs S, Schwarzkopf R. Mechanical complications after total knee arthroplasty. Expert Rev Med Devices 2023; 20:1105-1117. [PMID: 37950354 DOI: 10.1080/17434440.2023.2282744] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Accepted: 11/08/2023] [Indexed: 11/12/2023]
Abstract
INTRODUCTION With the increasing demand for total knee arthroplasty (TKA) and the burden of revision TKA on the healthcare system, as well as the quality of life implications for patients, it is extremely important for surgeons to be able to anticipate and prevent TKA mechanical complications. Surgeons must be familiar with the different causes and mechanisms of TKA complications so that they can properly treat patients with failed TKAs and better avoid these complications. AREAS COVERED This review addresses TKA mechanical complications and provides context for the topic. A detailed review of surgical factors, implant factors, and patient factors that contribute to mechanical complications after TKA is provided. All of the literature cited in this review was gathered from the PubMed online database using different keywords based on the section of the manuscript. EXPERT OPINION As surgeons and engineers solve certain issues in TKA, new challenges will inevitably arise. We must continue to push forward and innovate from both a surgical technique and implant design perspective.
Collapse
Affiliation(s)
- Patrick Connolly
- Department of Orthopedic Surgery, NYU Langone Health, New York, NY, USA
| | - Stefan Coombs
- Department of Orthopedic Surgery, NYU Langone Health, New York, NY, USA
| | - Ran Schwarzkopf
- Department of Orthopedic Surgery, NYU Langone Health, New York, NY, USA
| |
Collapse
|
6
|
Nishitani K, Kuriyama S, Nakamura S, Song YD, Morita Y, Ito H, Matsuda S. Excessive flexed position of the femoral component causes abnormal kinematics and joint contact/ ligament forces in total knee arthroplasty. Sci Rep 2023; 13:6356. [PMID: 37076503 PMCID: PMC10115888 DOI: 10.1038/s41598-023-33183-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Accepted: 04/08/2023] [Indexed: 04/21/2023] Open
Abstract
Poor clinical outcomes are reported in excessive flexion of the femoral component in total knee arthroplasty (TKA), but their mechanisms have not yet been elucidated. This study aimed to investigate the biomechanical effect of flexion of the femoral component. Cruciate-substituting (CS) and posterior-stabilised (PS) TKA were reproduced in a computer simulation. The femoral component was then flexed from 0° to 10° with anterior reference, keeping the implant size and the extension gap. Knee kinematics, joint contact, and ligament forces were evaluated in deep-knee-bend activity. When the femoral component was flexed 10° in CS TKA, paradoxical anterior translation of the medial compartment was observed at mid-flexion. The PS implant was best stabilised with a 4° flexion model in mid-flexion range. The medial compartment contact force and the medial collateral ligament (MCL) force increased with the flexion of the implant. There were no remarkable changes in the patellofemoral contact force or quadriceps in either implant. In conclusions, excessive flexion of the femoral component yielded abnormal kinematics and contact/ligament forces. Avoiding excessive flexion and maintaining mild flexion of the femoral component would provide better kinematics and biomechanical effects in CS and PS TKA.
Collapse
Affiliation(s)
- Kohei Nishitani
- Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawahara-Cho, Sakyo-Ku, Kyoto, 606-8507, Japan.
| | - Shinichi Kuriyama
- Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawahara-Cho, Sakyo-Ku, Kyoto, 606-8507, Japan
| | - Shinichiro Nakamura
- Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawahara-Cho, Sakyo-Ku, Kyoto, 606-8507, Japan
| | - Young Dong Song
- Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawahara-Cho, Sakyo-Ku, Kyoto, 606-8507, Japan
| | - Yugo Morita
- Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawahara-Cho, Sakyo-Ku, Kyoto, 606-8507, Japan
| | - Hiromu Ito
- Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawahara-Cho, Sakyo-Ku, Kyoto, 606-8507, Japan
| | - Shuichi Matsuda
- Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawahara-Cho, Sakyo-Ku, Kyoto, 606-8507, Japan
| |
Collapse
|
7
|
Medial congruent polyethylene design show different tibiofemoral kinematics and enhanced congruency compared to a standard symmetrical cruciate retaining design for total knee arthroplasty-an in vivo randomized controlled study of gait using dynamic radiostereometry. Knee Surg Sports Traumatol Arthrosc 2023; 31:933-945. [PMID: 35809105 DOI: 10.1007/s00167-022-07036-w] [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: 01/04/2022] [Accepted: 06/01/2022] [Indexed: 10/17/2022]
Abstract
PURPOSE New total knee arthroplasty implant designs attempt to normalize kinematics patterns that may improve functional performance and patient satisfaction. It was hypothesized that a more medial congruent (MC) anatomic bearing design (1) influences the tibiofemoral kinematics and (2) enhances articular congruency compared to a standard symmetrical cruciate retaining (CR) bearing design. METHODS In this double-blinded randomized study, 66 patients with knee osteoarthritis were randomly included in two groups: MC (n = 31) and CR (n = 33). Clinical characteristics such as knee ligament lesions and knee osteoarthritis scores were graded on preoperative magnetic resonance imaging and radiography. At the 1-year follow-up, dynamic radiostereometric analysis was used to assess tibiofemoral joint kinematics and articulation congruency. Patient-reported outcome measures, Oxford Knee Score, the Forgotten Joint Score, and the Knee Osteoarthritis Outcome Score, were assessed preoperatively and at the 1-year follow-up. RESULTS Compared to the CR bearing, the MC bearing displayed an offset with approximately 3 mm greater anterior tibial drawer (p < 0.001) during the entire motion, and up to approximately 3.5 degrees more tibial external rotation (p = 0.004) from mid-swing to the end of the gait cycle at the 1-year follow-up. Furthermore, the congruency area in the joint articulation was larger during approximately 80% of the gait cycle for the MC bearing compared to the CR. The patient-reported outcome measures improved (p < 0.001), but there were no differences between groups. In addition, there were no differences in clinical characteristics and there were no knee revisions or recognized deep infections during follow-up. CONCLUSION The study demonstrates that the MC-bearing design changes tibiofemoral kinematics and increases the area of congruency towards more native knee kinematics than the CR bearing. In perspective this may contribute to a more stabilized knee motion, restoring the patient's confidence in knee function during daily activities.
Collapse
|
8
|
Massé V, Cholewa J, Shahin M. Personalized alignment™ for total knee arthroplasty using the ROSA ® Knee and Persona ® knee systems: Surgical technique. Front Surg 2023; 9:1098504. [PMID: 36733674 PMCID: PMC9888495 DOI: 10.3389/fsurg.2022.1098504] [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: 11/15/2022] [Accepted: 12/13/2022] [Indexed: 01/11/2023] Open
Abstract
Total knee arthroplasty (TKA) procedures are expected to increase up to 565% in the United States over the next 3 decades. TKAs were traditionally performed with neutral mechanical alignments that provided equal medial and lateral gaps in extension and flexion to reduce implant wear but were less successful at restoring native knee function and associated with high patient dissatisfaction. Kinematic alignment (KA) restores native anatomy and minimizes soft tissue release; however, KAs that recreate severe deformities and/or biomechanically inferior alignments result in significant increases in implant stress and risk of aseptic loosening. Restricted kinematic alignment (rKA) recreates pre-arthritic anatomy within a range of acceptable alignment boundaries, and improved patient clinical scores and faster recoveries have been reported with rKA techniques. Personalized Alignment™ is an evolution of rKA that relies heavily upon robotic assistance to reliably recreate patient anatomy, native soft tissue laxity, and accurate component placement to improve patients' clinical outcomes. The purpose of this surgical technique report is to describe the Personalized Alignment TKA method using the ROSA® Knee System and Persona® The Personalized Knee® implants. Herein we provide specific procedures for pre-operative planning, anatomical landmarking and evaluation, intra-operative planning and adjustment of resections and cuts, cut validation and soft tissue evaluation with robotic-assisted personalized TKA.
Collapse
Affiliation(s)
- Vincent Massé
- Hôpital Maisonneuve-Rosemont, Surgery Department, Université de Montréal, Montreal, Quebec, Canada,Personalized Arthroplasty Society, Atlanta, GA, United States,Duval Orthopaedic Clinic, Laval, Québec, Canada,Correspondence: Vincent Massé
| | | | - Maged Shahin
- Personalized Arthroplasty Society, Atlanta, GA, United States,Duval Orthopaedic Clinic, Laval, Québec, Canada
| |
Collapse
|
9
|
Luan Y, Zhang M, Ran T, Wang H, Fang C, Nie M, Wang M, Cheng CK. Correlation between component alignment and short-term clinical outcomes after total knee arthroplasty. Front Surg 2022; 9:991476. [PMID: 36311927 PMCID: PMC9606652 DOI: 10.3389/fsurg.2022.991476] [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: 07/11/2022] [Accepted: 09/26/2022] [Indexed: 12/05/2022] Open
Abstract
OBJECTIVE This study aimed to investigate the correlation between component alignment and short-term clinical outcomes after total knee arthroplasty (TKA). METHODS 50 TKA patients from a regional hospital were enrolled in the study. The following component alignments were measured from radiological data acquired within 1 week after surgery: hip-knee-ankle angle (HKA), medial distal femoral angle (MDFA), medial proximal tibial angle (MPTA), femoral flexion-extension angle (FEA), tibial slope angle (TSA), femoral rotational angle (FRA) and tibial rotational angle (TRA). The Hospital for Special Surgery (HSS) knee scoring system was used to assess clinical outcomes after 1 year, with patients being divided into three groups (excellent, good and not good) according to the HSS scores. Difference analysis and linear correlation analysis were used for the statistical analysis. RESULTS The results showed significant differences in MDFA (p = 0.050) and FEA (p = 0.001) among the three patient groups. It was also found that the total HSS had only a moderate correlation with FEA (r = 0.572, p < 0.001), but FEA had a positive linear correlation with pain scores (r = 0.347, p = 0.013), function scores (r = 0.535, p = 0.000), ROM scores (r = 0.368, p = 0.009), muscle scores (r = 0.354, p = 0.012) and stability scores (r = 0.312, p = 0.028). A larger MDFA was associated with lower FE deformity scores (r = -0.289, p = 0.042) and the TSA had a positive influence on the ROM (r = 0.436, p = 0.002). Also, changes in FRA produced a consequent change in the FE deformity score (r = 0.312, p = 0.027), and the muscle strength scores increased as TRA increased (r = 0.402, p = 0.004). CONCLUSION The results show that the FEA plays a significant role in clinical outcomes after TKA. Surgical techniques and tools may need to be improved to accurately adjust the FEA to improve joint functionality and patient satisfaction.
Collapse
Affiliation(s)
- Yichao Luan
- School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Min Zhang
- School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Tianfei Ran
- Department of Orthopaedics, Xinqiao Hospital, Army Military Medical University, Chongqing, China
| | - Huizhi Wang
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Chaohua Fang
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China,Department of Joint Surgery, Ningbo No.6 Hospital, Ningbo, China
| | - Maodan Nie
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Min Wang
- Department of Orthopaedics, Xinqiao Hospital, Army Military Medical University, Chongqing, China,Correspondence: Min Wang Cheng-Kung Cheng
| | - Cheng-Kung Cheng
- School of Biological Science and Medical Engineering, Beihang University, Beijing, China,School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China,Correspondence: Min Wang Cheng-Kung Cheng
| |
Collapse
|
10
|
Lee DW, Lee J, Lee J, Ro DH, Lee MC, Han HS. A Flexible Intramedullary Guide Can Reduce the Anteroposterior Oversizing of Femoral Components Used in Total Knee Arthroplasty in Patients with Osteoarthritis and Severe Distal Femoral Sagittal Bowing. J Knee Surg 2022; 35:1119-1125. [PMID: 33545726 DOI: 10.1055/s-0040-1722325] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Traditionally, a rigid intramedullary rod has been used as the reference guide for femoral cutting in total knee arthroplasty (TKA). However, correct positioning of this rigid rod is difficult, especially in the knees with severe distal femoral sagittal bowing. A flexible intramedullary rod has been developed to address this problem. This study was performed to compare the sagittal alignment and clinical outcomes of TKAs performed with flexible and rigid femoral intramedullary guides. Thirty-eight knees that underwent primary TKAs with flexible intramedullary rods as femoral cutting guides were matched according to patient height and sex with 38 knees that underwent TKAs using conventional rigid rods. Clinical outcomes, including the range of motion and functional scores, and radiological variables, including the distal femoral bowing angle (DFBA), femoral component flexion angle (FFA), and mediolateral overhang and anteroposterior (AP) oversizing of femoral components, were evaluated. Clinical and radiological outcomes did not differ significantly between the flexible rod and conventional rigid rod groups. A subgroup analysis of knees with severe distal femoral sagittal bowing (DFBA >4 degrees) showed that the FFA was significantly larger in the flexible rod group than in the rigid rod group, with an average difference of 3 degrees (5.2 ± 2.4 vs. 2.2 ± 1.6 degrees, respectively, p = 0.022). In addition, the incidence of AP oversizing of femoral components was lower in the flexible rod group than in the rigid rod group (11.1 vs. 60.0%, respectively, p = 0.027). Relative to TKA with a rigid rod, TKA performed with a flexible femoral intramedullary guide resulted in more flexed sagittal alignment of femoral components in patients with severe distal femoral sagittal bowing. This greater flexion of the femoral component resulted in less AP oversizing. However, the use of a flexible rod had no impact on short-term clinical outcomes.
Collapse
Affiliation(s)
- Do Weon Lee
- Department of Orthopedic Surgery, Seoul National University Hospital, Seoul, South Korea
| | - Joonhee Lee
- Division of Knee Surgery, CM Hospital, Seoul, South Korea
| | - Junpyo Lee
- Department of Orthopedic Surgery, Seoul National University Hospital, Seoul, South Korea
| | - Du Hyun Ro
- Department of Orthopedic Surgery, Seoul National University Hospital, Seoul, South Korea
| | - Myung Chul Lee
- Department of Orthopedic Surgery, Seoul National University Hospital, Seoul, South Korea
| | - Hyuk-Soo Han
- Department of Orthopedic Surgery, Seoul National University Hospital, Seoul, South Korea
| |
Collapse
|
11
|
Sharma V, Laubach LK, Krumme JW, Satpathy J. Comminuted periprosthetic distal femoral fractures have greater postoperative extension malalignment. Knee 2022; 36:65-71. [PMID: 35526350 DOI: 10.1016/j.knee.2022.04.004] [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: 12/27/2021] [Revised: 02/19/2022] [Accepted: 04/18/2022] [Indexed: 02/02/2023]
Abstract
INTRODUCTION Comminution is a significant aspect of periprosthetic distal femoral fracture characterization and may influence post-surgical outcomes. Existing classification systems that guide treatment decisions do not take into account comminution and current literature is unclear on which surgical approach is optimal. We hypothesize that fractures with comminution will have poorer quality post-reduction alignment, especially with a lateral approach. MATERIALS AND METHODS 37 study patients were identified with billing codes designating a distal femoral periprosthetic fracture. A retrospective chart review was performed to categorize fractures by absence or presence of comminution and medial parapatellar versus lateral surgical approach. These patients underwent an imaging evaluation for the primary outcome of reduction quality including the anatomic lateral distal femoral angle (LDFA) and the posterior distal femoral angle (PDFA). Differences in radiographic outcomes were analyzed with Wilcoxon/Kruskal-Wallis tests, and analysis by approach was through Fisher's exact test. RESULTS Patients with comminuted fractures had significantly greater extension of the fragment (PDFA = 95.4° vs 90.0°, p = 0.018) and similar coronal alignment (LDFA = 85.3° vs 86.3°, p = 0.83) of the knee compared to non-comminuted fractures after surgical reduction. This difference was more prominent amongst those treated with a lateral approach (PDFA = 96.1° vs 89.4°, p = 0.032) than with a medial approach (PDFA = 93.7° vs 91.5°, p = 0.41) (Table 1). DISCUSSION Current classification systems and treatment guidelines for periprosthetic distal femoral fractures do not adequately address several issues that may influence treatment outcomes, especially comminution. Comminuted fractures had greater post-reduction extension malalignment, falling outside the recommended PDFA range of 87-90°, especially with a lateral approach. Consideration should be given to surgical approach and techniques to reduce excessive extension when treating comminuted periprosthetic distal femoral fractures.
Collapse
Affiliation(s)
- Viraj Sharma
- VCU Health Department of Orthopaedic Surgery, PO Box 980153, Richmond, VA 23298, United States.
| | - Logan K Laubach
- VCU Health Department of Orthopaedic Surgery, PO Box 980153, Richmond, VA 23298, United States.
| | - John W Krumme
- KC Orthopedic Alliance, UMKC, 3651 College Blvd, Leawood, KS 66211, United States.
| | - Jibanananda Satpathy
- VCU Health Department of Orthopaedic Surgery, PO Box 980153, Richmond, VA 23298, United States.
| |
Collapse
|
12
|
Koh YG, Lee JA, Lee HY, Suh DS, Park JH, Kang KT. Finite element analysis of femoral component sagittal alignment in mobile-bearing total knee arthroplasty. Biomed Mater Eng 2022; 33:195-207. [DOI: 10.3233/bme-211280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND: Recently, there has been an increasing interest in mobile-bearing total knee arthroplasty (TKA). However, changes in biomechanics for femoral component alignment in mobile-bearing TKA have not been explored in depth. OBJECTIVE: This study aims to evaluate the biomechanical effect of sagittal alignment of the femoral component in mobile-bearing TKA. METHODS: We developed femoral sagittal alignment models with −3°, 0°, 3°, 5°, and 7° flexion. We also examine the kinematics of the tibiofemoral (TF) joint, contact point on the TF joint, contact stress on the patellofemoral (PF) joint, collateral ligament force, and quadriceps force using a validated computational model under a deep-knee-bend condition. RESULTS: Posterior kinematics of the TF joint increases as the femoral component flexes. The contact stress on the PF joint, collateral ligament force, and the quadriceps force decreases as the femoral component flexes. CONCLUSIONS: Our results show that a slight, approximately 0°∼3°, flexion of the implantation could be an effective substitute technique. However, excessive flexion should be avoided because of the potential loosening of the TF joint.
Collapse
Affiliation(s)
| | - Jin-Ah Lee
- , Yonsei University, , Republic of Korea
| | | | | | - Joon-Hee Park
- , , Hallym University College of Medicine, , Republic of Korea
| | | |
Collapse
|
13
|
Li H, Zhu F, Liao S, Wang X, Zhong Y, Wen X, Zhao X, Liao W, Zhang Z. Higher Pelvic Incidence Was Associated with a Higher Risk of Sagittal Malposition of Femoral Component and Poor Outcomes of Primary Total Knee Arthroplasty: A Retrospective Cohort Analysis. J Knee Surg 2022. [PMID: 35405755 DOI: 10.1055/s-0042-1743494] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Spine-pelvis-lower extremity sagittal alignment is regarded as a global sagittal balance. Currently, there are few studies evaluating the pelvic and femoral sagittal alignment during total knee arthroplasty (TKA). This retrospective study aims to elucidate how pelvic and femoral sagittal alignment affect clinical outcomes of primary TKA for osteoarthritis (OA) and determine the proper range of femoral sagittal alignment. Patient-reported outcome measures (PROMs), including the Knee Society Score (KSS), Western Ontario and McMaster Universities (WOMAC), and patient satisfaction scores, and clinician-reported outcomes (CROs), including range of motion (ROM) and pelvic and femoral sagittal parameters, of 67 cases were evaluated (89 knees) before and 1 year after TKA. The angle between the distal femur anterior cortex line and flange of the femoral component (FC) was defined as the α angle. Correlations between the α angle and PROM and CRO were investigated using multivariate and secondary regression analyses. Patients were further divided into four cohorts (A, B, C, and D) according to the α angle, and comparisons of their postoperative PROM and ROM scores were performed. Postoperative PROM and ROM scores improved significantly compared with the preoperative scores (p < 0.01). Only the α angle was significantly associated with postoperative knee extension among all PROM and CRO indexes (p = 0.001). Secondary regression demonstrated a convex upward function, and the scores were the highest at α angles of 0.57, 0.96, and -1.42 degrees for postoperative KSS, satisfaction, and range of knee extension, respectively (p < 0.01). However, the concave upward degree was the lowest at an α angle of 0.33 degrees for pelvic incidence (p < 0.001). Bonferroni's paired comparisons indicated that postoperative KSS and satisfaction of the cohort B (0 degrees ≤ α angle ≤ 3 degrees) were better than those of other cohorts (p < 0.0125). The results indicate that surgeons should pay more attention to the sagittal alignment of FC in patients with increased pelvic incidence, the distal femoral anterior cortex is recommended as an anatomic landmark, and 0 to 3 degrees might be "safe zones" of the sagittal flexion of FC in TKA. This study reflects the level of evidence III.
Collapse
Affiliation(s)
- Hongyi Li
- Department of Orthopaedics, Qingyuan People' Hospital/the Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan, China.,Department of Joint Surgery, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, Guangzhou, China
| | - Fei Zhu
- Department of Joint Surgery, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Shufen Liao
- Department of Surgery, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Xiangjiang Wang
- Department of Orthopaedics, Qingyuan People' Hospital/the Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan, China
| | - Yanlin Zhong
- Department of Joint Surgery, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Xingzhao Wen
- Department of Joint Surgery, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Xiaoyi Zhao
- Department of Joint Surgery, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Weiming Liao
- Department of Joint Surgery, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Zhiqi Zhang
- Department of Joint Surgery, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| |
Collapse
|
14
|
Kanna R, Ravichandran C, Shetty GM. Notching is less, if femoral component sagittal positioning is planned perpendicular to distal femur anterior cortex axis, in navigated TKA. Knee Surg Relat Res 2021; 33:46. [PMID: 34952652 PMCID: PMC8709981 DOI: 10.1186/s43019-021-00129-9] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Accepted: 12/08/2021] [Indexed: 12/20/2022] Open
Abstract
Purpose In navigated TKA, the risk of notching is high if femoral component sagittal positioning is planned perpendicular to the sagittal mechanical axis of femur (SMX). We intended to determine if, by opting to place the femoral component perpendicular to distal femur anterior cortex axis (DCX), notching can be reduced in navigated TKA. Methods We studied 171 patients who underwent simultaneous bilateral computer-assisted TKA. Femoral component sagittal positioning was planned perpendicular to SMX in one knee (Femur Anterior Bowing Registration Disabled, i.e. FBRD group) and perpendicular to DCX in the opposite knee (Femur Anterior Bowing Registration Enabled, i.e. FBRE group). Incidence and depth of notching were recorded in both groups. For FBRE knees, distal anterior cortex angle (DCA), which is the angle between SMX and DCX, was calculated by the computer. Results Incidence and mean depth of notching was less (p = 0.0007 and 0.009) in FBRE versus FBRD group, i.e. 7% versus 19.9% and 0.98 mm versus 1.53 mm, respectively. Notching was very high (61.8%) in FBRD limbs when the anterior bowing was severe (DCA > 3°) in the contralateral (FBRE) limbs. Conclusion Notching was less when femoral component sagittal positioning was planned perpendicular to DCX, in navigated TKA. Level of evidence Therapeutic level II.
Collapse
Affiliation(s)
- Raj Kanna
- Department of Orthopaedic Surgery, Prashanth Super Speciality Hospital, Velachery Main Road, Chennai, 600042, India.
| | - Chandramohan Ravichandran
- Department of Orthopaedic Surgery, Prashanth Super Speciality Hospital, Velachery Main Road, Chennai, 600042, India
| | - Gautam M Shetty
- Knee & Orthopaedic Clinic, Mumbai, India.,AIMD Research, Mumbai, India
| |
Collapse
|
15
|
张 金, 冯 硕, 张 乐, 周 航, 陈 向. [Research progress of anterior femoral notching in total knee arthroplasty]. ZHONGGUO XIU FU CHONG JIAN WAI KE ZA ZHI = ZHONGGUO XIUFU CHONGJIAN WAIKE ZAZHI = CHINESE JOURNAL OF REPARATIVE AND RECONSTRUCTIVE SURGERY 2021; 35:1499-1504. [PMID: 34779180 PMCID: PMC8586779 DOI: 10.7507/1002-1892.202105026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Revised: 08/29/2021] [Indexed: 11/03/2022]
Abstract
OBJECTIVE To summarize the research progress of the causes and prevention methods of anterior femoral notching in total knee arthroplasty (TKA). METHODS The related literature at home and abroad about the causes and prevention methods of the anterior femoral notching in TKA was extensively reviewed and summarized. RESULTS The reasons for the occurrence of anterior femoral notching can be summarized as follows: the application of the posterior reference technique, the increase of the posterior condylar angle, the variant anatomical shape of anterior femoral cortex, the selective reduction of the femoral prosthesis size, backward movement of the entrance point, and the application of computer-assisted navigation technology or patient-specific instrumentation. To prevent the occurrence of anterior femoral notching, programs such as flex the femoral prosthesis, robot-assisted technology, and anterior and posterior reference techniques combination can be used. CONCLUSION Anterior femoral notching is a common surgical complication of TKA. A complete preoperative plan, assessment of the patient's knee joint condition, and development of a reasonable surgical plan can effectively reduce the occurrence of anterior femoral notching.
Collapse
Affiliation(s)
- 金成 张
- 徐州医科大学附属医院关节外科(江苏徐州 221006)Department of Joint Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou Jiangsu, 221006, P.R.China
| | - 硕 冯
- 徐州医科大学附属医院关节外科(江苏徐州 221006)Department of Joint Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou Jiangsu, 221006, P.R.China
| | - 乐曙 张
- 徐州医科大学附属医院关节外科(江苏徐州 221006)Department of Joint Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou Jiangsu, 221006, P.R.China
| | - 航 周
- 徐州医科大学附属医院关节外科(江苏徐州 221006)Department of Joint Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou Jiangsu, 221006, P.R.China
| | - 向阳 陈
- 徐州医科大学附属医院关节外科(江苏徐州 221006)Department of Joint Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou Jiangsu, 221006, P.R.China
| |
Collapse
|
16
|
Cho BW, Nam JH, Koh YG, Min JH, Park KK, Kang KT. Gender-Based Quantitative Analysis of the Grand Piano Sign in Mechanically Aligned Total Knee Arthroplasty in Asians. J Clin Med 2021; 10:jcm10091969. [PMID: 34064317 PMCID: PMC8125574 DOI: 10.3390/jcm10091969] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 04/16/2021] [Accepted: 04/29/2021] [Indexed: 11/16/2022] Open
Abstract
In mechanically aligned (MA) total knee arthroplasty (TKA), the grand piano sign helps surgeons to further ensure the proper external rotation of the femoral component. The goal of this study was to determine the sex-related differences in the shape of the anterior resection surface using 3D magnetic resonance imaging (MRI) models. MRI scans were performed on 267 consecutive patients (202 women and 65 men) with osteoarthritis who underwent TKA in order to reconstruct a 3D model. Virtual anterior condylar resection was performed based on the surgical transepicondylar axis (sTEA), Whiteside's line (WSL), and flexion-extension axis (FEA). On the anterior resection surface, both lateral length (LatL) and medial length (MedL) were measured, and the ratio between the two (MedL/LatL) was calculated. The mediolateral width of the distal femur (ML) and anterior resection surface (M'L') were measured, and the ratio between the M'L' and ML (M'L'/ML) was calculated. Both the lateral deviation (LD) and the ratio between LD and ML (LD/ML) were also determined. Morphological classification of the anterior resection surface was conducted based on the presence of a definite medial peak. When based on the sTEA or WSL, the MedL/LatL of female subjects was significantly greater than that of male subjects (p < 0.001 and p < 0.05, respectively). The MedL/LatL of the FEA was consistently larger than that obtained using the sTEA or WSL. Among female subjects, the MedL/LatL of the sTEA was significantly greater than that of the WSL, although this was not the case in either the total study population or the male subjects alone. When based on the sTEA, the M'L'/ML was statistically greater in the female subjects (p < 0.01). The LD was greater in the male subjects (p < 0.01), but there was no difference between the male and female subjects when comparing the LD/ML (p = 0.93). The proportion of double- and single-peak types was not significantly different between the sexes (p = 0.196). Surgeons should be aware that the shape of the anterior resection surface may differ depending on the sex of the patient. The results of this study provide more consistent surgical outcomes as well as fundamental anatomical data for designing suitable prostheses applicable to the Korean population.
Collapse
Affiliation(s)
- Byung-Woo Cho
- Department of Orthopedic Surgery, Severance Hospital, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea; (B.-W.C.); (J.-H.M.)
| | - Ji-Hoon Nam
- Department of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea;
| | - Yong-Gon Koh
- Joint Reconstruction Center, Department of Orthopaedic Surgery, Yonsei Sarang Hospital, 10 Hyoryeong-ro, Seocho-gu, Seoul 06698, Korea;
| | - Ji-Hwan Min
- Department of Orthopedic Surgery, Severance Hospital, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea; (B.-W.C.); (J.-H.M.)
| | - Kwan-Kyu Park
- Department of Orthopedic Surgery, Severance Hospital, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea; (B.-W.C.); (J.-H.M.)
- Correspondence: (K.-K.P.); (K.-T.K.)
| | - Kyoung-Tak Kang
- Department of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea;
- Correspondence: (K.-K.P.); (K.-T.K.)
| |
Collapse
|
17
|
Gao J, Hou Y, Li R, Ke Y, Li Z, Lin J. The accelerometer-based navigation system demonstrated superior radiological outcomes in restoring mechanical alignment and component sagittal positioning in total knee arthroplasty. BMC Musculoskelet Disord 2021; 22:351. [PMID: 33849489 PMCID: PMC8045229 DOI: 10.1186/s12891-021-04213-9] [Citation(s) in RCA: 3] [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] [Received: 11/27/2020] [Accepted: 03/30/2021] [Indexed: 11/16/2022] Open
Abstract
Background This study aimed to determine whether the accelerometer-based navigation (ABN) could improve the accuracy of restoring mechanical axis (MA), component positioning, and clinical outcomes compared to conventional (CON) total knee arthroplasty (TKA). Methods A total of 301 consecutive patients (ABN: 27, CON: 274) were included. A 1:4 propensity score matching (PSM) was performed between the two groups according to preoperative demographic and clinical parameters. The postoperative MA, femoral coronal angle (FCA), femoral sagittal angle (FSA), tibial coronal angle (TCA) and tibial sagittal angle (TSA) were compared. Absolute deviations of aforementioned angles were calculated as the absolute value of difference between the exact and ideal value and defined as norms if within 3°, otherwise regarded as outliers. Additional clinical parameters, including the Knee Society knee and function scores (KSKS and KSFS) and range of motion (ROM), were assessed at final follow-up (FU) (mean FU was 21.88 and 21.56 months respectively for ABN and CON group). A secondary subgroup analysis and comparison on clinical outcomes were conducted between norms and outliers in different radiological parameters. Results A total of 98 patients/102 knees were analyzed after the PSM (ABN: 21 patients/24 knees, CON: 77 patients/78 knees). In the ABN group, the mean MA, FCA and TSA were significantly improved (p = 0.019, 0.006, < 0.001, respectively). Proportions of TKAs within a ± 3°deviation were significantly improved in all the postoperative radiological variables except for TCA (p = 0.003, 0.021, 0.042, 0.013, respectively for MA, FCA, FSA, and TSA). The absolute deviations of FSA and TSA were also significantly lower in the ABN group (p = 0.020, 0.048, respectively). No significant differences were found in either mean value, absolute deviation or outlier ratio of TCA between two groups. On clinical outcomes, there were no significant differences between two groups, although KSKS, KSFS and ROM (p < 0.01, respectively) dramatically improved compared to baseline. The subgroup analysis also demonstrated no statistical difference on clinical outcomes between the outliers and norms in varied radiological parameters. Conclusions The ABN could improve the accuracy and precision of mechanical alignment and component positioning without significant improvement of clinical outcomes. Further high quality studies with long term FU are warranted to comprehensively evaluate the value of the ABN.
Collapse
Affiliation(s)
- Jiaxiang Gao
- Arthritis Clinic & Research Center, Peking University People's Hospital, Peking University, Beijing, 100044, China.,Arthritis Institute, Peking University, Beijing, China
| | - Yunfei Hou
- Arthritis Clinic & Research Center, Peking University People's Hospital, Peking University, Beijing, 100044, China.,Arthritis Institute, Peking University, Beijing, China
| | - Rujun Li
- Arthritis Clinic & Research Center, Peking University People's Hospital, Peking University, Beijing, 100044, China.,Arthritis Institute, Peking University, Beijing, China
| | - Yan Ke
- Arthritis Clinic & Research Center, Peking University People's Hospital, Peking University, Beijing, 100044, China.,Arthritis Institute, Peking University, Beijing, China
| | - Zhichang Li
- Arthritis Clinic & Research Center, Peking University People's Hospital, Peking University, Beijing, 100044, China. .,Arthritis Institute, Peking University, Beijing, China.
| | - Jianhao Lin
- Arthritis Clinic & Research Center, Peking University People's Hospital, Peking University, Beijing, 100044, China. .,Arthritis Institute, Peking University, Beijing, China.
| |
Collapse
|
18
|
Koh YG, Lee JA, Chung HS, Kim HJ, Kang KT. Restoration of normal knee kinematics with respect to tibial insert design in mobile bearing lateral unicompartmental arthroplasty using computational simulation. Bone Joint Res 2020; 9:421-428. [PMID: 32864113 PMCID: PMC7437519 DOI: 10.1302/2046-3758.97.bjr-2019-0384.r1] [Citation(s) in RCA: 3] [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] [Indexed: 11/27/2022] Open
Abstract
Aims Mobile-bearing unicompartmental knee arthroplasty (UKA) with a flat tibial plateau has not performed well in the lateral compartment, leading to a high rate of dislocation. For this reason, the Domed Lateral UKA with a biconcave bearing was developed. However, medial and lateral tibial plateaus have asymmetric anatomical geometries, with a slightly dished medial and a convex lateral plateau. Therefore, the aim of this study was to evaluate the extent at which the normal knee kinematics were restored with different tibial insert designs using computational simulation. Methods We developed three different tibial inserts having flat, conforming, and anatomy-mimetic superior surfaces, whereas the inferior surface in all was designed to be concave to prevent dislocation. Kinematics from four male subjects and one female subject were compared under deep knee bend activity. Results The conforming design showed significantly different kinematics in femoral rollback and internal rotation compared to that of the intact knee. The flat design showed significantly different kinematics in femoral rotation during high flexion. The anatomy-mimetic design preserved normal knee kinematics in femoral rollback and internal rotation. Conclusion The anatomy-mimetic design in lateral mobile UKA demonstrated restoration of normal knee kinematics. Such design may allow achievement of the long sought normal knee characteristics post-lateral mobile UKA. However, further in vivo and clinical studies are required to determine whether this design can truly achieve a more normal feeling of the knee and improved patient satisfaction. Cite this article: Bone Joint Res 2020;9(7):421–428.
Collapse
Affiliation(s)
- Yong-Gon Koh
- Joint Reconstruction Center, Department of Orthopaedic Surgery, Yonsei Sarang Hospital, Seoul, Republic of Korea
| | - Jin-Ah Lee
- Department of Mechanical Engineering, Yonsei University, Seoul, Republic of Korea
| | - Hyun-Seok Chung
- Joint Reconstruction Center, Department of Orthopaedic Surgery, Yonsei Sarang Hospital, Seoul, Republic of Korea
| | - Hyo-Jeong Kim
- Department of Sport and Healthy Aging, Korea National Sport University, Seoul, Republic of Korea
| | - Kyoung-Tak Kang
- Department of Mechanical Engineering, Yonsei University, Seoul, Republic of Korea
| |
Collapse
|
19
|
Koh YG, Lee JA, Lee HY, Chun HJ, Kim HJ, Kang KT. Anatomy-mimetic design preserves natural kinematics of knee joint in patient-specific mobile-bearing unicompartmental knee arthroplasty. Knee Surg Sports Traumatol Arthrosc 2020; 28:1465-1472. [PMID: 31123794 DOI: 10.1007/s00167-019-05540-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2018] [Accepted: 05/13/2019] [Indexed: 11/26/2022]
Abstract
PURPOSE This study aims to evaluate whether different tibial-femoral conformities for patient-specific mobile-bearing unicompartmental knee arthroplasties (UKAs) preserve natural knee kinematics, using computational simulations. METHODS Different designs for patient-specific mobile-bearing UKAs were evaluated using finite element analysis. Three designs for the identical femoral component were considered: flat (non-conforming design), anatomy-mimetic, and conforming for the tibial insert. RESULTS The conforming design for the patient-specific mobile-bearing UKAs exhibited a 1.2 mm and 0.7° decrease in the translation and rotation, respectively, in the swing phase compared with those of the natural knee. In addition, the femoral rollback and internal rotation were 2.6 mm and 1.2° lower, respectively, than those of the natural knee, for the conforming design under the deep-knee-bend condition. The flat design for the patient-specific mobile-bearing UKAs exhibited a 2.2 mm and 1.4° increase in the femoral rollback and rotation compared with the natural knee under the deep-knee-bend condition. The anatomy-mimetic patient-specific mobile-bearing UKAs best preserved the natural knee kinematics under the gait and deep-knee-bend loading conditions. CONCLUSIONS The kinematics of the loading conditions in patient-specific mobile-bearing UKAs was determined to closely resemble those of a native knee. In additional, by replacing the anatomy-mimetic design with a mobile-bearing, natural knee kinematics during gait and deep-knee-bend motions is preserved. These results confirm the importance of tibiofemoral conformity in preserving native knee kinematics in patient-specific mobile-bearing UKA.
Collapse
Affiliation(s)
- Yong-Gon Koh
- Department of Orthopaedic Surgery, Joint Reconstruction Center, Yonsei Sarang Hospital, 10 Hyoryeong-ro, Seocho-gu, Seoul, 06698, South Korea
| | - Jin-Ah Lee
- Department of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea
| | - Hwa-Yong Lee
- Department of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea
| | - Heoung-Jae Chun
- Department of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea
| | - Hyo-Jeong Kim
- Department of Sport and Healthy Aging, Korea National Sport University, 1239 Yangjae-dearo, Songpa-gu, Seoul, 05541, South Korea
| | - Kyoung-Tak Kang
- Department of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea.
| |
Collapse
|
20
|
Koh YG, Lee JA, Lee HY, Suh DS, Kim HJ, Kang KT. Effect of sagittal femoral component alignment on biomechanics after mobile-bearing total knee arthroplasty. J Orthop Surg Res 2019; 14:400. [PMID: 31779650 PMCID: PMC6883526 DOI: 10.1186/s13018-019-1458-5] [Citation(s) in RCA: 4] [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: 10/02/2019] [Accepted: 11/05/2019] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND Recently, there has been increasing interest in mobile-bearing total knee arthroplasty (TKA). However, changes in biomechanics with respect to femoral component alignment in mobile-bearing TKA have not been explored in depth. This study aims to evaluate the biomechanical effect of sagittal alignment of the femoral component in mobile-bearing TKA. METHODS We developed femoral sagittal alignment models with - 3°, 0°, 3°, 5°, and 7°. We also examined the kinematics of the tibiofemoral (TF) joint, contact point on the TF joint, contact stress on the patellofemoral (PF) joint, collateral ligament force, and quadriceps force using a validated computational model under a deep-knee-bend condition. RESULTS Posterior kinematics of the TF joint increased as the femoral component flexed. In addition, contact stress on the PF joint, collateral ligament force, and quadriceps force decreased as the femoral component flexed. The results of this study can assist surgeons in assessing risk factors associated with femoral component sagittal alignment for mobile-bearing TKA. CONCLUSIONS Our results showed that slight flexion implantation may be an effective alternative technique because of its advantageous biomechanical effect. However, excessive flexion should be avoided because of potential loosening of the TF joint.
Collapse
Affiliation(s)
- Yong-Gon Koh
- Joint Reconstruction Center, Department of Orthopaedic Surgery, Yonsei Sarang Hospital, 10 Hyoryeong-ro, Seocho-gu, Seoul, 06698, Republic of Korea
| | - Jin-Ah Lee
- Department of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Hwa-Yong Lee
- Department of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Dong-Suk Suh
- Joint Reconstruction Center, Department of Orthopaedic Surgery, Yonsei Sarang Hospital, 10 Hyoryeong-ro, Seocho-gu, Seoul, 06698, Republic of Korea
| | - Hyo-Jeong Kim
- Department of Sport and Healthy Aging, Korea National Sport University, 1239 Yangjae-dearo, Songpa-gu, Seoul, 05541, Republic of Korea
| | - Kyoung-Tak Kang
- Department of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.
| |
Collapse
|
21
|
Christopher ZK, Deckey DG, Chung AS, Spangehl MJ. Patellar osteolysis after total knee arthroplasty with patellar resurfacing: a potentially underappreciated problem. Arthroplast Today 2019; 5:435-441. [PMID: 31886386 PMCID: PMC6921183 DOI: 10.1016/j.artd.2019.09.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 09/02/2019] [Accepted: 09/17/2019] [Indexed: 11/30/2022] Open
Abstract
Osteolysis of the patella following total knee arthroplasty is both uncommon and poorly described in the literature. We describe 3 cases of total knee arthroplasty with patella resurfacing that later presented with anterior knee pain with patellar osteolysis without evidence of patellar implant failure: 2 males and 1 female patient, all with bilateral knee osteoarthritis. Osteolysis of the patella was identified radiographically between 2 and 16 years from the index procedure. We theorize that high pressures across the patella-femoral joint, in obese or muscular patients, may play a role in the formation of these patellar osteolytic lesions. We suspect that the prevalence of this phenomenon is under-recognized in the literature and may increase with longer term follow-up and awareness.
Collapse
Affiliation(s)
| | | | | | - Mark J. Spangehl
- Corresponding author. Department of Orthopedics, Mayo Clinic Arizona, 5777 E. Mayo Blvd, Phoenix, AZ 85054, USA. Tel.: +1 480 342 6202.
| |
Collapse
|