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MacDessi SJ, van de Graaf VA, Wood JA, Griffiths-Jones W, Bellemans J, Chen DB. Not all knees are the same. Bone Joint J 2024; 106-B:525-531. [PMID: 38821506 DOI: 10.1302/0301-620x.106b6.bjj-2023-1292.r1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/02/2024]
Abstract
The aim of mechanical alignment in total knee arthroplasty is to align all knees into a fixed neutral position, even though not all knees are the same. As a result, mechanical alignment often alters a patient's constitutional alignment and joint line obliquity, resulting in soft-tissue imbalance. This annotation provides an overview of how the Coronal Plane Alignment of the Knee (CPAK) classification can be used to predict imbalance with mechanical alignment, and then offers practical guidance for bone balancing, minimizing the need for soft-tissue releases.
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Affiliation(s)
- Samuel J MacDessi
- CPAK Research Group, Sydney, Australia
- School of Clinical Medicine, University of NSW Medicine and Health, Sydney, Australia
- Sydney Knee Specialists, Kogarah, Australia
| | | | - Jil A Wood
- Sydney Knee Specialists, Kogarah, Australia
| | | | - Johan Bellemans
- CPAK Research Group, Sydney, Australia
- University Hasselt, ZOL Hospitals Genk, ArthroClinic Leuven, Leuven, Belgium
| | - Darren B Chen
- CPAK Research Group, Sydney, Australia
- Sydney Knee Specialists, Kogarah, Australia
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Hiranaka T. Current concept: personalized alignment total knee arthroplasty as a contrast to classical mechanical alignment total knee arthroplasty. ARTHROPLASTY 2024; 6:23. [PMID: 38705976 PMCID: PMC11071279 DOI: 10.1186/s42836-024-00246-2] [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: 08/25/2023] [Accepted: 02/26/2024] [Indexed: 05/07/2024] Open
Abstract
Mechanical alignment (MA) total knee arthroplasty (TKA), with neutral leg alignment, mechanical component alignment, and parallel gaps, has achieved good long-term survival. Patient satisfaction, however, is not always perfect. In contrast to the MA, which aims for an ideal goal for all patients, an alternative has been proposed: kinematic alignment (KA)-TKA. In KA, the articular surface is replicated using components aligning with the three kinematic axes. KA-TKA has been gaining popularity, and in addition to the true or calipered KA, various derivatives, such as restricted KA, soft-tissue respecting KA, and functional alignments, have been introduced. Moreover, the functional approach encompasses several sub-approaches. This somewhat complicated scenario has led to some confusion. Therefore, the terminology needs to be re-organized. The term "personalized alignment (PA)" has been used in contrast to the MA approach, including all approaches other than MA. The term "PA-TKA" should be used comprehensively instead of KA and it represents the recent trends in distinct and unique consideration of each individual case. In addition to a comparison between MA and KA, we suggest that evaluation should be conducted to decide which approach is the best for an individual patient within the "personalized alignment" concept.
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Affiliation(s)
- Takafumi Hiranaka
- Department of Orthopaedic Surgery and Joint Surgery Centre, Takatsuki General Hospital, Osaka, 569-1192, Japan.
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Seo S, Kang M, Han MW. Shape Memory Alloys Patches to Mimic Rolling, Sliding, and Spinning Movements of the Knee. Biomimetics (Basel) 2024; 9:255. [PMID: 38786465 PMCID: PMC11118610 DOI: 10.3390/biomimetics9050255] [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: 03/13/2024] [Revised: 04/11/2024] [Accepted: 04/17/2024] [Indexed: 05/25/2024] Open
Abstract
Every year, almost 4 million patients received medical care for knee osteoarthritis. Osteoarthritis involves progressive deterioration or degenerative changes in the cartilage, leading to inflammation and pain as the bones and ligaments are affected. To enhance treatment and surgical outcomes, various studies analyzing the biomechanics of the human skeletal system by fabricating simulated bones, particularly those reflecting the characteristics of patients with knee osteoarthritis, are underway. In this study, we fabricated replicated bones that mirror the bone characteristics of patients with knee osteoarthritis and developed a skeletal model that mimics the actual movement of the knee. To create patient-specific replicated bones, models were extracted from computerized tomography (CT) scans of knee osteoarthritis patients. Utilizing 3D printing technology, we replicated the femur and tibia, which bear the weight of the body and support movement, and manufactured cartilage capable of absorbing and dispersing the impact of knee joint loads using flexible polymers. Furthermore, to implement knee movement in the skeletal model, we developed artificial muscles based on shape memory alloys (SMAs) and used them to mimic the rolling, sliding, and spinning motions of knee flexion. The knee movement was investigated by changing the SMA spring's position, the number of coils, and the applied voltage. Additionally, we developed a knee-joint-mimicking system to analyze the movement of the femur. The proposed artificial-skeletal-model-based knee-joint-mimicking system appears to be applicable for analyzing skeletal models of knee patients and developing surgical simulation equipment for artificial joint replacement surgery.
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Affiliation(s)
| | | | - Min-Woo Han
- Advanced Manufacturing & Soft Robotics Laboratory, Department of Mechanical Engineering, Dongguk University, 30 Pildong-ro 1, Jung-gu, Seoul 04620, Republic of Korea; (S.S.); (M.K.)
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Tarassoli P, Warnock JM, Lim YP, Jagota I, Parker D. Large multiplanar changes to native alignment have no apparent impact on clinical outcomes following total knee arthroplasty. Knee Surg Sports Traumatol Arthrosc 2024; 32:432-444. [PMID: 38294963 DOI: 10.1002/ksa.12044] [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: 09/14/2023] [Revised: 12/12/2023] [Accepted: 12/13/2023] [Indexed: 02/02/2024]
Abstract
PURPOSE This study sought to examine if achieved postoperative alignment when compared to the native anatomy would lead to a difference in Patient Reported Outcome Measures (PROMs), and whether the achieved alignment could be broadly categorised by an accepted alignment strategy. METHODS A retrospective cohort study of prospectively collected data on patients undergoing single primary or bilateral simultaneous total knee arthroplasty (TKA) was carried out. CT scans were used to determine the mean change ("delta values") between the pre and postoperative; hip-knee-ankle angle, lateral distal femoral angle, medial proximal tibial angle and femoral implant rotation. Femoral implant flexion and tibial implant slope were measured postoperatively. The primary outcome was the relationship of the variables to the change in KOOS pain subscale after one year. The secondary outcome was the number of knees which could be categorised postoperatively to an alignment strategy, and the mean PROMs in each cohort. RESULTS A total of 296 knees in 261 patients were available for analysis. With regards to the primary outcome, the delta values for each variable did not demonstrate any association with the change in knee injury and osteoarthritis outcome score (KOOS) pain score. Approximately 46% of knees could not be categorised to an alignment strategy based on postoperatively measured alignment, with no significant difference between each cohort with regards to the change in KOOS Pain score. CONCLUSION Achieved alignment does not consistently match accepted alignment strategies, and appears to confer no benefit to clinical outcomes when the native anatomy is most closely approximated, nor results in poorer outcomes in outliers. This study highlights the importance of routine three dimensional pre and postoperative imaging in clinical practice and for the valid analysis of outcomes in studies on alignment. LEVEL OF EVIDENCE Level III, retrospective cohort study.
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Affiliation(s)
- Payam Tarassoli
- Sydney Orthopaedic Research Institute, St Leonards, Australia
| | | | - Yoong Ping Lim
- Sydney Orthopaedic Research Institute, St Leonards, Australia
- The University of Sydney, Camperdown, Australia
- Charles Darwin University, Casuarina, Australia
| | - Ishaan Jagota
- 360 Med Care Pty Ltd, Pymble, Australia
- Flinders University, Adelaide, Australia
| | - David Parker
- Sydney Orthopaedic Research Institute, St Leonards, Australia
- The University of Sydney, Camperdown, Australia
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Jeffrey M, Marchand P, Kouyoumdjian P, Coulomb R. Short-term functional outcomes of robotic-assisted TKA are better with functional alignment compared to adjusted mechanical alignment. SICOT J 2024; 10:2. [PMID: 38240728 PMCID: PMC10798231 DOI: 10.1051/sicotj/2024002] [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: 09/28/2023] [Accepted: 01/03/2024] [Indexed: 01/22/2024] Open
Abstract
INTRODUCTION Ligament balancing is essential to the functional outcome of total knee arthroplasty (TKA). The optimal method of alignment remains a controversial issue. The primary objective was to compare the clinical outcomes of TKA between functional and adjusted mechanical alignment techniques. The secondary objectives were to compare bone resection, robotic alignment, and radiological assessment. MATERIALS AND METHODS This was a retrospective case-control series comparing TKA performed with functional alignment (FA) and adjusted mechanical alignment (aMA). Sixty-four FA subjects were matched with 64 aMA controls. These two groups were matched for age, gender, body mass index (BMI), surgeon, and type of frontal deformity. Both surgical procedures were performed using the MAKO® haptic robotic system. Functional scores (Forgotten Joint Score (FJS), Knee Society Score (KSS), and Oxford Knee Score (OKS)) were measured at the final postoperative follow-up. A radiographic evaluation was performed at the same time. RESULTS Mean FJS were respectively 63.4 ± 25.1 [0-100] and 51.2 ± 31.8 [0-100] in FA versus aMA group (p = 0.034). Mean OKS were respectively 40.8 ± 6.3 [21-48] and 34.9 ± 11.8 [3-48] in FA versus aMA group (p = 0.027). Mean KSS were respectively 184.9 ± 17.0 [126-200] and 175.6 ± 23.1 [102-200] in FA versus aMA group (p = 0.02). The main residual symptom was "none" for 73.0% versus 57.8%, "instability" for 6.4% versus 21.9%, "Pain" for 19.1% versus 12.5%, and "effusion" for 1.6% and 7.8% respectively for FA and aMA group (p = 0.016). There were 4 complications in the FA group versus 5 in the aMA group (p > 0.999). Mean postoperative hip-knee-ankle (HKA) robotic assessment were respectively 177.3° ± 2.0 [172-180] and 178.2° ± 2.0 [173-180] for FA and aMA group (p = 0.018). The median difference between HKA robotic and HKA radiological was -3.0° (IQR = 3.0; p < 0.001). CONCLUSION With greater residual deformity and without release, functional alignment showed a statistically significantly better short-term clinical outcome than adjusted mechanical alignment. This difference may not be clinically significant.
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Affiliation(s)
- Michaud Jeffrey
- Orthopedic and Traumatology Surgery Department, CHU Nîmes, University Montpellier 1, Nîmes Place du Professeur Robert Debré 30029 Nîmes France
| | - Philippe Marchand
- Orthopedic and Traumatology Surgery Department, CHU Nîmes, University Montpellier 1, Nîmes Place du Professeur Robert Debré 30029 Nîmes France
| | - Pascal Kouyoumdjian
- Orthopedic and Traumatology Surgery Department, CHU Nîmes, University Montpellier 1, Nîmes Place du Professeur Robert Debré 30029 Nîmes France
- Laboratory LMGC, CNRS UMR 5508, University of Montpellier II 860 Rue de St – Priest 34090 Montpellier France
| | - Remy Coulomb
- Orthopedic and Traumatology Surgery Department, CHU Nîmes, University Montpellier 1, Nîmes Place du Professeur Robert Debré 30029 Nîmes France
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Kobayashi T, Kawaguchi K, Goto K, Suzuki H, Otsu M, Michishita K. Functional knee phenotypes: A helpful classification tool for visualizing potential femoral varus in restricted kinematic alignment total knee arthroplasty in Japan. Knee Surg Sports Traumatol Arthrosc 2024; 32:103-115. [PMID: 38226677 DOI: 10.1002/ksa.12028] [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: 10/10/2023] [Revised: 11/29/2023] [Accepted: 12/02/2023] [Indexed: 01/17/2024]
Abstract
PURPOSE Restricted kinematic alignment (rKA) is a modified technique of kinematically aligned total knee arthroplasty (TKA) within a safe alignment range for long-term implant survivorship. The purpose of this study was to clarify (1) the distribution of functional knee phenotypes in patients who underwent TKA in Japan and (2) whether the application of this classification results in anatomically neutral alignment after rKA TKA. METHODS Overall, 114 TKA surgeries (mechanical alignment [MA]: 49; rKA: 65) were performed. The joint line orientation angle (JLOA), hip-knee-ankle angle (HKA), femoral mechanical angle (FMA) and tibial mechanical angle (TMA) were obtained. The knees were categorized using a functional knee phenotype classification. Clinical evaluations, including the Knee Injury and Osteoarthritis Outcome, 12-question Forgotten Joint and Oxford Knee Scores, were performed 3 years postoperatively. Between-group comparisons were made. RESULTS The most common preoperative functional knee phenotype was VARHKA 3° + NEUFMA 0° + VARTMA 3° (11.4%). In the preoperative population, 51 knees (44.7%) had VARFMA ≥ 3°. Postoperatively, the most common functional knee phenotype was NEUHKA 0° + VARFMA 3° + VALTMA 3° (14 knees, 28.6%) in the MA and NEUHKA 0° + NEUFMA 0° + NEUTMA 0° in the rKA group. The percentage of postoperative JLOA within ±3° from the floor was 27% and 72% in the MA and rKA groups, respectively (p < 0.001). The functional knee phenotype after rKA TKA was neutrally reproduced, and the joint line was more parallel to the ground in the standing position than that of MA. Between-group differences in clinical outcomes were not significant. CONCLUSION The application of functional knee phenotyping to knee osteoarthritis in Japan suggested the presence of racial morphological characteristics. This classification could help better visualize potential femoral varus, contributing to protocol deviation in applying restricted KA TKA. LEVEL OF EVIDENCE Level IV.
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Affiliation(s)
- Takashi Kobayashi
- Department of Orthopedic Surgery, Yugawara Hospital, Yugawara, Kanagawa, Japan
| | - Kohei Kawaguchi
- Department of Orthopedic Surgery, Faculty of Medicine, The University of Tokyo, Bunkyo City, Tokyo, Japan
| | - Kazumi Goto
- Department of Sports Orthopedics Surgery, Kanto Rosai Hospital, Kawasaki, Kanagawa, Japan
| | - Hayata Suzuki
- Department of Orthopedic Surgery, Yugawara Hospital, Yugawara, Kanagawa, Japan
| | - Masayoshi Otsu
- Department of Orthopedic Surgery, Yugawara Hospital, Yugawara, Kanagawa, Japan
| | - Kazuhiko Michishita
- Department of Orthopedic Surgery, Yugawara Hospital, Yugawara, Kanagawa, Japan
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Foley KA, Schwarzkopf R, Culp BM, Bradley MP, Muir JM, McIntosh EI. Improving alignment in total knee arthroplasty: a cadaveric assessment of a surgical navigation tool with computed tomography imaging. Comput Assist Surg (Abingdon) 2023; 28:2267749. [PMID: 37849241 DOI: 10.1080/24699322.2023.2267749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2023] Open
Abstract
PURPOSE To investigate the accuracy of an imageless, optical surgical navigation tool to assist with femoral and tibial bone cuts performed during TKA. PATIENTS AND METHODS Six board-certified orthopedic surgeons participated in a laboratory cadaver investigation, performing femoral and tibial bone cuts with the assistance of a computer navigation tool. Femoral and tibial varus/valgus, tibial slope, femoral flexion, and both femoral and tibial rotation measurements from the device were compared with angular measurements calculated from computed tomography (CT) images of the knees. RESULTS Measurements with the navigation tool were highly correlated with those obtained from CT scans in all three axes. For the distal femoral cut, the absolute mean difference in varus/valgus was 0.83° (SD 0.46°, r = 0.76), femoral flexion was 1.91° (SD 1.16°, r = 0.85), and femoral rotation was 1.29° (SD 1.01°, r = 0.88) relative to Whiteside's line and 0.97° (SD 0.56°, r = 0.81) relative to the posterior condylar axis. For the tibia, the absolute mean difference in varus/valgus was 1.08° (SD 0.64°, r = 0.85), posterior slope was 2.78° (SD 1.40°, r = 0.60), and rotation relative to the anteroposterior axis (posterior cruciate ligament to the medial third of the tibial tuberosity) was 2.98° (SD 2.54°, r = 0.79). CONCLUSION Utilization of an imageless navigation tool may aid surgeons in accurately performing and monitoring femoral and tibial bone cuts, and implant rotation in TKA and thus, more accurately align TKA components.
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Affiliation(s)
| | | | - Brian M Culp
- Princeton Orthopaedic Associates, Princeton, NJ, USA
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Ishikawa M, Ishikawa M, Nagashima H, Ishizuka S, Michishita K, Soda Y, Hiranaka T. Effects of Unrestricted Kinematically Aligned Total Knee Arthroplasty with a Modified Soft-Tissue Respecting Technique on the Deformity of Limb Alignment in Japanese Patients. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:1969. [PMID: 38004019 PMCID: PMC10673030 DOI: 10.3390/medicina59111969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 10/27/2023] [Accepted: 11/06/2023] [Indexed: 11/26/2023]
Abstract
Background and Objectives: Unrestricted kinematic alignment total knee arthroplasty (KA-TKA) with a soft-tissue respecting technique (STRT) is a soft-tissue-dependent tibial resection entailing the restoration of the original soft-tissue tension using ligamentotaxis after resurfacing the femur, based on the concept of restoring the native or pre-osteoarthritis alignment in each patient. However, there is no consensus on the indications of unrestricted KA-TKA with the STRT. We modified the STRT, followed by an investigation of the effects of surgery on the postoperative hip-knee-ankle angle (HKAA). Materials and Methods: We retrospectively analyzed the clinical background data, including the preoperative and postoperative HKAA, of 87 patients who underwent unrestricted KA-TKA with the modified STRT. Univariate and multivariate analyses were performed to determine the factors affecting the postoperative HKAA. A receiver operating characteristic (ROC) curve was plotted to investigate the change in the cut-off values of preoperative HKAA with respect to the safe zone of the postoperative HKAA. We generated two regression models, the linear regression model and generalized additive model (GAM) using machine learning, to predict the postoperative HKAA. Results: Univariate and multivariate analyses revealed the preoperative HKAA as the factor most relevant to the postoperative HKAA. ROC analysis revealed that the preoperative HKAA exhibited a high predictive utility, with a cut-off value of -10°, when the safe range of postoperative HKAA was set at ±5°. The GAM was the superior machine learning model, indicating a non-linear association between the preoperative and postoperative HKAA. Patients with preoperative HKAAs ranging from -18° to 4° were more likely to fall within the ±5° safe range of the postoperative HKAA. Conclusions: The preoperative HKAA influences the postoperative HKAA in unrestricted KA-TKA with the modified STRT. Machine learning using the GAM may contribute to the selection of patients eligible for the surgical approach.
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Affiliation(s)
- Masahiro Ishikawa
- Department of Orthopedic Surgery, Nagahama Red Cross Hospital, Miyamae Nagahama, Nagahama 526-0053, Shiga, Japan;
| | - Masaaki Ishikawa
- Department of Otolaryngology, Head and Neck Surgery, Hyogo Prefectural Amagasaki General Medical Center, 2-17-77 Higashinaniwachou, Amagasaki 660-8550, Hyogo, Japan
| | - Hideaki Nagashima
- Department of Orthopedic Surgery, Nagahama Red Cross Hospital, Miyamae Nagahama, Nagahama 526-0053, Shiga, Japan;
| | - Shinya Ishizuka
- Department of Orthopedic Surgery, Nagoya University Graduate School of Medicine, 65 Tsurumaicho Shouwaku Nagoya, Nagoya 466-8550, Aichi, Japan;
| | - Kazuhiko Michishita
- Department of Orthopedic Surgery, Japan Community Healthcare Organization, Yugawara Hospital, Yugawara 259-0396, Kanagawa, Japan;
| | - Yoshinori Soda
- Department of Joint Reconstruction and Arthroscopy Center, Midorii Orthopedics, 6-35-1 Midorii, Asaminami-ku, Hiroshima City 731-0103, Hiroshima, Japan;
| | - Takafumi Hiranaka
- Department of Orthopedic Surgery and Joint Surgery Centre, Takatsuki General Hospital, 1-3-13 Kosobe-Cho, Osaka 569-1192, Osaka, Japan;
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Karasavvidis T, Pagan Moldenhauer CA, Haddad FS, Hirschmann MT, Pagnano MW, Vigdorchik JM. Current Concepts in Alignment in Total Knee Arthroplasty. J Arthroplasty 2023; 38:S29-S37. [PMID: 36773657 DOI: 10.1016/j.arth.2023.01.060] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 01/24/2023] [Accepted: 01/31/2023] [Indexed: 02/13/2023] Open
Abstract
BACKGROUND In an effort to increase satisfaction among total knee arthroplasty (TKA) patients, emphasis has been placed on implant positioning and limb alignment. Traditionally, the aim for TKA has been to achieve a neutral mechanical alignment (MA) to maximize implant longevity. However, with the recent spike in interest in individualized alignment techniques and with the advent of new technologies, surgeons are slowly evolving away from classical MA. METHODS This review elucidates the differences in alignment techniques for TKA, describes the concept of knee phenotypes, summarizes comparative studies between MA and individualized alignment, and provides a simple way to incorporate the latter into surgeons' practice. RESULTS In order to manage patients by applying these strategies in day-to-day practice, a basic understanding of the aforementioned concepts is essential. Transition to an individualized alignment technique should be done gradually with caution in a stepwise approach. CONCLUSION Alignment and implant positioning are now at the heart of the debate and surgeons are investigating a more personalized approach to TKA.
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Affiliation(s)
- Theofilos Karasavvidis
- Adult Reconstruction and Joint Replacement Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York
| | - Cale A Pagan Moldenhauer
- Adult Reconstruction and Joint Replacement Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York
| | - Fares S Haddad
- Department of Trauma and Orthopaedic Surgery, University College London Hospital, London
| | - Michael T Hirschmann
- Department of Orthopaedic Surgery and Traumatology, Kantonsspital Baselland, Bruderholz, Switzerland
| | - Mark W Pagnano
- Deparment of Orthopaedic Surgery, Mayo Clinic, Rochester, Minnesota
| | - Jonathan M Vigdorchik
- Adult Reconstruction and Joint Replacement Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York
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Miura T, Takahashi T, Watanabe J, Kataoka Y, Ae R, Saito H, Takeshita K, Miyakoshi N. Postoperative clinical outcomes for kinematically, restricted kinematically, or mechanically aligned total knee arthroplasty: a systematic review and network meta-analysis of randomized controlled trials. BMC Musculoskelet Disord 2023; 24:322. [PMID: 37095485 PMCID: PMC10124064 DOI: 10.1186/s12891-023-06448-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Accepted: 04/20/2023] [Indexed: 04/26/2023] Open
Abstract
BACKGROUND Mechanically aligned total knee arthroplasty (MATKA) is a well-established procedure. Kinematically aligned TKA (KATKA) has been proposed to restore and preserve pre-arthritic knee anatomy. However, normal knee anatomy varies widely, and there have been concerns regarding restoring unusual anatomy. Accordingly, restricted KATKA (rKATKA) was introduced to reproduce constitutional knee anatomy within a safe range. This network meta-analysis (NMA) aimed to evaluate the clinical and radiological outcomes of the surgeries. METHODS We performed a database search on August 20, 2022, which included randomized controlled trials (RCTs) comparing any two of the three surgical TKA techniques for knee osteoarthritis. We conducted a random-effects NMA within the frequentist framework and evaluated confidence in each outcome using the Confidence in Network Meta-Analysis tool. RESULTS Ten RCTs with 1,008 knees and a median follow-up period of 1.5 years were included. The three methods might result in little to no difference in range of motion (ROM) between methods. In patient-reported outcome measures (PROMs), the KATKA might result in a slight improvement compared with the MATKA (standardized mean difference, 0.47; 95% confidence interval [CI], 0.16-0.78; very low confidence). There was little to no difference in revision risk between MATKA and KATKA. KATKA and rKATKA showed a slight valgus femoral component (mean difference [MD], -1.35; 95% CI, -1.95-[-0.75]; very low confidence; and MD, -1.72; 95% CI, -2.63-[-0.81]; very low confidence, respectively) and a slight varus tibial component (MD, 2.23; 95% CI, 1.22-3.24; very low confidence; and MD, 1.25; 95% CI, 0.01-2.49; very low confidence, respectively) compared with MATKA. Tibial component inclination and hip-knee-ankle angle might result in little to no difference between the three procedures. CONCLUSIONS KATKA and rKATKA showed similar ROM and PROMs and a slight variation in the coronal component alignment compared with MATKA. KATKA and rKATKA are acceptable methods in short- to mid-term follow-up periods. However, long-term clinical results in patients with severe varus deformity are still lacking. Surgeons should choose surgical procedures carefully. Further trials are warranted to evaluate the efficacy, safety, and subsequent revision risk.
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Affiliation(s)
- Takanori Miura
- Department of Orthopedic Surgery, Tazawako Hospital, 17-1 Ukiyozaka Obonai, Tazawako, Senboku, Akita, 014-1201, Japan
| | - Tsuneari Takahashi
- Department of Orthopedic Surgery, Ishibashi General Hospital, 1-15-4 Shimokoyama, Shimotsuke, Tochigi, 329-0596, Japan.
| | - Jun Watanabe
- Department of Surgery, Division of Gastroenterological, General and Transplant Surgery, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke City, Tochigi, 329-0498, Japan
- Center for Community Medicine, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke City, Tochigi, 329-0498, Japan
- Scientific Research WorkS Peer Support Group (SRWS-PSG), Osaka, Japan
| | - Yuki Kataoka
- Scientific Research WorkS Peer Support Group (SRWS-PSG), Osaka, Japan
- Department of Internal Medicine, Kyoto Min-Iren Asukai Hospital, Tanaka Asukai-Cho 89, Sakyo-Ku, Kyoto, 606-8226, Japan
- Section of Clinical Epidemiology, Department of Community Medicine, Kyoto University Graduate School of Medicine, Yoshida Konoe-Cho, Sakyo-Ku, Kyoto, 606-8501, Japan
- Department of Healthcare Epidemiology, Kyoto University Graduate School of Medicine / Public Health, Yoshida Konoe-Cho, Sakyo-Ku, Kyoto, 606-8501, Japan
| | - Ryusuke Ae
- Division of Public Health, Center for Community Medicine, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke City, Tochigi, 329-0498, Japan
| | - Hidetomo Saito
- Department of Orthopedic Surgery, Akita University Graduate School of Medicine, 1-1-1 Hondo, Akita, 010-8543, Japan
| | - Katsushi Takeshita
- Department of Orthopaedic Surgery, School of Medicine, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke, 329-0498, Japan
| | - Naohisa Miyakoshi
- Department of Orthopedic Surgery, Akita University Graduate School of Medicine, 1-1-1 Hondo, Akita, 010-8543, Japan
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Hsieh SL, Lin TL, Hung CH, Fong YC, Chen HT, Tsai CH. Clinical and Radiographic Outcomes of Inversed Restricted Kinematic Alignment Total Knee Arthroplasty by Asia Specific (Huang’s) Phenotypes, a Prospective Pilot Study. J Clin Med 2023; 12:jcm12062110. [PMID: 36983113 PMCID: PMC10057926 DOI: 10.3390/jcm12062110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 02/23/2023] [Accepted: 03/03/2023] [Indexed: 03/10/2023] Open
Abstract
Inverse restricted kinematic alignment (irKA) was modified from restricted kinematic alignment for total knee arthroplasty (TKA). This prospective single-center study aimed to evaluate the outcomes of irKA-TKA on all knee subtypes classified by Asia specific (Huang’s) phenotypes. A total of 96 knees that underwent irKA-TKA at one hospital between January 2018 and June 2020 were included, with 15 knees classified in Type 1, nine in Type 2, 15 in Type 3, 47 in Type 4, and 10 in Type 5 by Huang’s phenotypes. Outcomes were knee alignment measures and patient-reported satisfaction evaluated by the Western Ontario and McMaster Universities Arthritis Index (WOMAC) and traditional Chinese version of the Forgotten Joint Score-12 (FJS-12). Follow-up was one year. Type 4 knee was most significantly corrected in all angles by irKA-TKA, followed by Type 2 and 3 knees. Type 5 and 1 knee were only significantly corrected in some angles. The correlation between FJS-12 and WOMAC was good at 6 months (Pearson correlation coefficient (r) = 0.74) and moderate at 6 weeks, 3 months, and 12 months during follow-up (r = 0.37~0.47). FJS-12 and WOMAC displayed comparable hip–knee–ankle angle cut-off value (4.71° vs. 6.20°), sensitivity (70.49% vs. 67.19%), specificity (84.00% vs. 85.71%), and Youden index (54.49% vs. 52.90%) in prediction of good prognosis. In conclusion, irKA-TKA corrects knee alignment in all knee types with increasing satisfaction for one-year follow-up. Knees with presurgical varus deformity are most recommended for irKA-TKA. Both presurgical scores of the traditional Chinese version of FJS-12 and WOMAC predict the prognosis of irKA-TKA.
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Affiliation(s)
- Shang-Lin Hsieh
- Department of Orthopedics, China Medical University Hospital, Taichung 404, Taiwan
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung 404, Taiwan
| | - Tsung-Li Lin
- Department of Orthopedics, China Medical University Hospital, Taichung 404, Taiwan
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung 404, Taiwan
- Department of Sports Medicine, College of Health Care, China Medical University, Taichung 404, Taiwan
| | - Chih-Hung Hung
- Department of Orthopedics, China Medical University Hospital, Taichung 404, Taiwan
| | - Yi-Chin Fong
- Department of Orthopedics, China Medical University Hospital, Taichung 404, Taiwan
- Department of Sports Medicine, College of Health Care, China Medical University, Taichung 404, Taiwan
- Department of Orthopedics, China Medical University Beigang Hospital, Yunlin 651, Taiwan
| | - Hsien-Te Chen
- Department of Orthopedics, China Medical University Hospital, Taichung 404, Taiwan
- Department of Sports Medicine, College of Health Care, China Medical University, Taichung 404, Taiwan
| | - Chun-Hao Tsai
- Department of Orthopedics, China Medical University Hospital, Taichung 404, Taiwan
- Department of Sports Medicine, College of Health Care, China Medical University, Taichung 404, Taiwan
- Correspondence:
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