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Zhang Z, Zhang T, Zhang L, Chen Z, Zhao H, Kuang J, Ou L. Comparison of the coverage and rotation of asymmetrical and symmetrical tibial components: a systematic review and meta-analysis. BMC Musculoskelet Disord 2024; 25:336. [PMID: 38671454 PMCID: PMC11046884 DOI: 10.1186/s12891-024-07466-2] [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: 10/07/2023] [Accepted: 04/22/2024] [Indexed: 04/28/2024] Open
Abstract
BACKGROUND An optimized fit of the tibial component to the resection platform and correct rotational alignment are critical for successful total knee arthroplasty (TKA). However, there remains controversy regarding the superiority of symmetric tibial component versus asymmetric tibial component. The objective of this systematic review and meta-analysis was to evaluate the current evidence for comparing the coverage and rotation of asymmetrical and symmetrical tibial component. METHODS We searched potentially relevant studies form PubMed, Web of science, Embase, Cochrane Central Register of Controlled Trials (CENTRAL), and China National Knowledge Infrastructure (CNKI), up to 1 March 2023. Data extraction and quality assessment were performed by two independent reviewers. Meta-analysis was conducted using Review Manager 5.4. RESULTS Sixteen articles were identified. Compared to symmetric tibial component, asymmetric tibial component increased the coverage of the proximal tibial cut surface (MD, -2.87; 95%CI, -3.45 to -2.28; P < 0.00001), improved the prevalence of tibial baseplate underhang (OR, 0.16; 95%CI, 0.07 to 0.33; P < 0.00001) and malrotation (OR, 0.13; 95%CI, 0.02 to 0.90; P = 0.04), and reduced the degree of tibial component rotation (MD, -3.11; 95%CI, -5.76 to -0.47; P = 0.02). But there was no statistical significance for improving tibial baseplate overhang (OR, 0.58; 95%CI, 0.08 to 3.97; P = 0.58). Additionally, no revision had occurred for the two tibial components in the included studies. CONCLUSION The current evidence shows asymmetric tibial component offer advantages in terms of coverage and rotation compared with symmetric tibial component in TKA.
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Affiliation(s)
- Ziming Zhang
- Hunan Academy of Chinese Medicine, 58 Lushan Street, Changsha, 410006, China
- Hunan University of Chinese Medicine, Changsha, China
| | - Tiantian Zhang
- Hunan Academy of Chinese Medicine, 58 Lushan Street, Changsha, 410006, China
| | - Le Zhang
- Hunan University of Chinese Medicine, Changsha, China
| | - Zehua Chen
- Department of Orthopedics, Orthopedics Hospital of Chinese Medicine Zhuzhou City, Zhuzhou, China
| | - Haoming Zhao
- Hunan University of Chinese Medicine, Changsha, China
| | - Jianjun Kuang
- Hunan Academy of Chinese Medicine, 58 Lushan Street, Changsha, 410006, China.
| | - Liang Ou
- Hunan Academy of Chinese Medicine, 58 Lushan Street, Changsha, 410006, China.
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Suneja A, Deshpande SV, Pisulkar G, Taywade S, Awasthi AA, Salwan A, Goel S. Navigating the Divide: A Comprehensive Review of the Mechanical and Anatomical Axis Approaches in Total Knee Replacement. Cureus 2024; 16:e57938. [PMID: 38738158 PMCID: PMC11084915 DOI: 10.7759/cureus.57938] [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: 02/05/2024] [Accepted: 04/09/2024] [Indexed: 05/14/2024] Open
Abstract
This comprehensive review explores the mechanical and anatomical axis approaches in total knee replacement (TKR) surgery, addressing the ongoing debate within the orthopedic community. Emphasizing the significance of TKR in alleviating knee-related disorders, this review underscores the pivotal role of accurate alignment in achieving optimal surgical outcomes. The purpose is to navigate the divide between the well-established mechanical axis approach, focusing on a straight-line alignment, and the anatomical axis approach, aligning with natural knee landmarks. The analysis delves into the advantages, disadvantages, and clinical implications of each approach, offering a nuanced perspective on their efficacy. The conclusion emphasizes a patient-centric approach, recommending the adoption of hybrid strategies and the incorporation of emerging technologies for enhanced precision. The future of TKR aligns with personalized medicine, leveraging advancements in computer-assisted navigation, robotics, and patient-specific implants. Ongoing professional development and interdisciplinary collaboration are crucial for surgeons, and as the field evolves, innovations in artificial intelligence, imaging, and 3D printing are expected to shape the trajectory of TKR alignment approaches.
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Affiliation(s)
- Anmol Suneja
- Orthopedics, Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education & Research, Wardha, IND
| | - Sanjay V Deshpande
- Orthopedics, Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education & Research, Wardha, IND
| | - Gajanan Pisulkar
- Orthopedics, Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education & Research, Wardha, IND
| | - Shounak Taywade
- Orthopedics, Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education & Research, Wardha, IND
| | - Abhiram A Awasthi
- Orthopedics and Traumatology, Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education & Research, Wardha, IND
| | - Ankur Salwan
- Orthopedics, Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education & Research, Wardha, IND
| | - Sachin Goel
- Orthopedics, Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education & Research, Wardha, IND
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Sim CHS, Chen JDY, Pang HN, Yeo SJ, Lo NN, Liow MHL. Novel morphogenic knee implant delivers comparable mid-term outcomes as compared to conventional non-morphogenic implants. Arch Orthop Trauma Surg 2023; 143:7159-7167. [PMID: 37566132 DOI: 10.1007/s00402-023-04990-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 07/10/2023] [Indexed: 08/12/2023]
Abstract
INTRODUCTION Conventional total knee arthroplasty (C-TKA) implants have well-established mid- and long-term outcomes. The novel TKA (N-TKA) implants provide morphogenic implant components with smaller size increments to facilitate anatomical replication. The aim of the study is to evaluate if these advantages provides better clinical outcomes. MATERIALS AND METHODS Registry data prospectively collected within a single institution from 2014 to 2018 was reviewed and propensity score matching was performed to match C-TKA to N-TKA. 70 pairs of cruciate retaining (CR) TKA and 116 pairs of posterior stabilized (PS) TKA were identified. Range of motion, SF-36, Knee Society Knee Score (KSKS), Knee Society Function Score (KSFS) and Oxford Knee Score (OKS) were assessed preoperatively, 6 and 24 months postoperatively. Satisfaction was assessed 6 and 24 months postoperatively. Independent T test was performed for parametric data, whereas Wilcoxon rank-sum analysis was performed for non-parametric data. RESULTS Both C-TKA and N-TKA cohorts demonstrated statistically significant improvement for KSKS, KSFS, OKS and SF-36 at 6 and 24 months postoperatively. C-TKA CR patients had better flexion at 6 months as compared to N-TKA CR (108.7° versus 98.3°, respectively, p = 0.046). At 24 months, there was no difference between C-TKA and N-TKA for range of motion, KSKS, KSFS, OKS and SF-36 PCS, regardless of insert type (p > 0.05). CONCLUSIONS Both models showed great postoperative improvements in KSFS, KSKS, OKS and SF-36 and have comparable early and mid-term outcomes, suggesting that N-TKAs are suitable substitutes for C-TKA. Longer follow-up studies are required to evaluate the long-term outcomes of N-TKAs. LEVEL OF EVIDENCE lll.
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Affiliation(s)
- Craigven Hao Sheng Sim
- Department of Orthopaedic Surgery, Singapore General Hospital, 20 College Road, Academia, Level 4, Singapore, 169856, Singapore
| | - Jerry Delphi Yongqiang Chen
- Department of Orthopaedic Surgery, Singapore General Hospital, 20 College Road, Academia, Level 4, Singapore, 169856, Singapore
| | - Hee Nee Pang
- Department of Orthopaedic Surgery, Singapore General Hospital, 20 College Road, Academia, Level 4, Singapore, 169856, Singapore
| | - Seng Jin Yeo
- Department of Orthopaedic Surgery, Singapore General Hospital, 20 College Road, Academia, Level 4, Singapore, 169856, Singapore
| | - Ngai Nung Lo
- Department of Orthopaedic Surgery, Singapore General Hospital, 20 College Road, Academia, Level 4, Singapore, 169856, Singapore
| | - Ming Han Lincoln Liow
- Department of Orthopaedic Surgery, Singapore General Hospital, 20 College Road, Academia, Level 4, Singapore, 169856, Singapore.
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Lee H, Yanagisawa M, Sumino T, Sano Y, Chang Y, Kan J, Fujimaki H, Ryu K, Nakanishi K. The anteroposterior distance between the posterior edge of the medial tibial condyle and the posterior edge of the fibular head in the lateral view can be a reference in determining the axis perpendicular to the tibial anteroposterior axis. Knee 2023; 45:18-26. [PMID: 37734169 DOI: 10.1016/j.knee.2023.08.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 06/06/2023] [Accepted: 08/15/2023] [Indexed: 09/23/2023]
Abstract
BACKGROUND Obtaining an accurate tibial lateral view is important during high tibial osteotomy. This study investigated whether the posterior edge of the medial/lateral tibial condyle (PEMTC/PELTC) and the posterior edge of the fibular head (PEFH) in a lateral view could be a reference for determining the accurate tibial lateral view. METHODS A total of 75 lower limbs in 38 subjects were evaluated in this study. In order to target healthy knees, subjects undergoing primary total hip arthroplasty were selected. The MF/LF, comprising the anteroposterior distance between PEMTC/PELTC and PEFH, was measured on the lateral view of the tibial bone model based on the tibial anteroposterior (AP) axis (true lateral view: TLV). In addition, measurements were calculated in the model with a 10° external/internal rotation. Using these measurements, linear regression analysis was performed to predict the tibial rotation with MF/LF. RESULTS The mean MF/LF was 0.9/4.6 mm (P < 0.001). MF and LF increased with incremental tibial rotation. Regression formulas were derived from these results as follows: Tibial rotation = (1) -1.01 + 1.06 × MF (R2 = 0.87, P < 0.001), (2) -8.70 + 1.86 × LF (R2 = 0.51, P < 0.001). The mean tibial rotation angle when MF was 0 mm was -0.9°. CONCLUSIONS Based on formula (1) and actual measurements, the mean tibial rotation angle when MF is 0 mm is an internal rotation of about 1°. Therefore, a lateral view, in which PEMTC and PEFH are seen colinearly, can be the approximate TLV. The MF can be a suitable intraoperative reference in determining TLV.
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Affiliation(s)
- Hyunho Lee
- Department of Orthopaedic Surgery, Nihon University School of Medicine, Tokyo, Japan.
| | - Masahiko Yanagisawa
- Department of Orthopaedic Surgery, Nihon University School of Medicine, Tokyo, Japan
| | - Takanobu Sumino
- Department of Orthopaedic Surgery, Nihon University School of Medicine, Tokyo, Japan
| | - Yutaka Sano
- Department of Orthopaedic Surgery, Nihon University School of Medicine, Tokyo, Japan
| | - Yingshih Chang
- Department of Orthopaedic Surgery, Nihon University School of Medicine, Tokyo, Japan
| | - Junichiro Kan
- Department of Orthopaedic Surgery, Nihon University School of Medicine, Tokyo, Japan
| | - Hirohisa Fujimaki
- Department of Orthopaedic Surgery, Nihon University School of Medicine, Tokyo, Japan
| | - Keinosuke Ryu
- Department of Orthopaedic Surgery, Nihon University School of Medicine, Tokyo, Japan
| | - Kazuyoshi Nakanishi
- Department of Orthopaedic Surgery, Nihon University School of Medicine, Tokyo, Japan
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András G, Németh G, Oláh CZ, Lénárt G, Drén Z, Papp M. The personalized Berger method is usable to solve the problem of tibial rotation. J Exp Orthop 2021; 8:116. [PMID: 34897564 PMCID: PMC8665959 DOI: 10.1186/s40634-021-00432-0] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 11/16/2021] [Indexed: 11/28/2022] Open
Abstract
Purpose The revision of any total knee replacement is carried out in a significant number of cases, due to the excessive internal rotation of the tibial component. The goal was to develop a personalized method, using only the geometric parameters of the tibia, without the femoral guidelines, to calculate the postoperative rotational position of tibial component malrotation within a tolerable error threshold in every case. Methods Preoperative CT scans of eighty-five osteoarthritic knees were examined by three independent medical doctors twice over 7 weeks. The geometric centre of the tibia was produced by the ellipse annotation drawn 8 mm below the tibial plateau, the sagittal and frontal axes of the ellipse were transposed to the slice of the tibial tuberosity. With the usage of several guide lines, a right triangle was drawn within which the personalized Berger angle was calculated. Results A very good intra-observer (0.89-0.925) and inter-observer (0.874) intra-class correlation coefficient (ICC) was achieved. Even if the average of the personalized Berger values were similar to the original 18° (18.32° in our case), only 70.6% of the patients are between the clinically tolerable thresholds (12.2° and 23.8°). Conclusion The method, measured on the preoperative CT scans, is capable of calculating the required correction during the planning of revision arthroplasties which are necessary due to the tibial component malrotation. The personalized Berger angle isn’t altered during arthroplasty, this way it determines which one of the anterior reference points of the tibia (medial 1/3 or the tip of the tibial tuberosity, medial border or 1/6 or 1/3 or the centre of the patellar tendon) can be used during the positioning of the tibial component. Level of evidence Level II, Diagnostic Study (Methodological Study).
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Affiliation(s)
- Gömöri András
- Department of Traumatology, Semmelweis University - Medicine and Health Sciences, Borsod-Abaúj-Zemplén County Hospital, Üllői út 26., Budapest, 1085, Hungary.
| | - Gábor Németh
- Department of Ophthalmology, Borsod-Abaúj-Zemplén County Hospital, Szentpéteri kapu 72-76, Miskolc, 3526, Hungary
| | - Csaba Zsolt Oláh
- Department of Neurosurgery, Borsod-Abaúj-Zemplén County Hospital, Szentpéteri kapu 72-76, Miskolc, 3526, Hungary
| | - Gábor Lénárt
- Department of Radiology, Borsod-Abaúj-Zemplén County Hospital, Szentpéteri kapu 72-76, Miskolc, 3526, Hungary
| | - Zsanett Drén
- Department of Radiology, Borsod-Abaúj-Zemplén County Hospital, Szentpéteri kapu 72-76, Miskolc, 3526, Hungary
| | - Miklós Papp
- TritonLife Róbert Magánkórház, Department of Orthopaedics, Miskolci Egyetem, Egészségtudományi kar, Egyetemváros, Miskolc, 3515, Hungary
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Okazaki Y, Pujol N. The use of an asymmetrical tibial tray in TKA optimises tibial rotation when fitted to the posterior tibial plateau border. Knee Surg Sports Traumatol Arthrosc 2020; 28:3821-3826. [PMID: 32006074 DOI: 10.1007/s00167-020-05858-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 01/13/2020] [Indexed: 12/19/2022]
Abstract
PURPOSE The aim of this study was to evaluate the suitability of positioning an asymmetrical tibial tray relative to the posterior tibial edge and to analyse the relationship between the posterior fit and tibial rotation after computer-assisted total knee arthroplasty (TKA). It was hypothesised that an asymmetrical tray would adjust to the posterior border of the tibial plateau with proper tibial rotation. METHODS Ninety-three consecutive knees underwent total knee arthroplasty using a Persona fixed-bearing system (63 varus deformities and 30 valgus deformities) and a 3-month follow-up CT scan. An independent examiner measured different variables: the femoral angle between the clinical epicondylar axis and the posterior condylar line of the femoral component, the tibial angle between the posterior borders of the tibial tray and the tibial plateau, and the tibial rotation with respect to the femoral component. These measurements were also compared between varus and valgus subgroups. RESULTS For the varus and valgus subgroups, the mean postoperative femoral angle was 2.1º ± 1.2º and 2.5º ± 1.0º, respectively (n.s.). The mean posterior fitting angle of the tibial tray was 0.1º ± 2.4º and 1.4º ± 3.2º for the varus and valgus subgroups, respectively, with a significant difference between groups (p = 0.03). The tibial rotations with respect to the femoral component for the varus and valgus groups were 0.9º ± 3.3º and 2.2º ± 3.1º of external rotation, respectively (n.s.). CONCLUSIONS This study demonstrated that fitting an asymmetrical tibial tray to the posterior border of the tibial plateau could optimise tibial rotation. The posterior border was considered to be a reliable and easily identifiable landmark for proper tibial rotation and coverage during a primary TKA. LEVEL OF EVIDENCE IV.
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Affiliation(s)
- Yoshiki Okazaki
- Service d'Orthopédie Traumatologie, Department of Orthopedic Surgery, Centre Hospitalier de Versailles, Hôpital André-Mignot, 78150, Le Chesnay, France.,Department of Orthopaedic Surgery, Okayama University Graduate School, 2-5-1 Shikata-cho, Kitaku, Okayama, 700-8558, Japan
| | - Nicolas Pujol
- Service d'Orthopédie Traumatologie, Department of Orthopedic Surgery, Centre Hospitalier de Versailles, Hôpital André-Mignot, 78150, Le Chesnay, France.
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Are asymmetric tibial baseplates superior in primary total knee arthroplasty? A systematic review of clinical studies. CURRENT ORTHOPAEDIC PRACTICE 2020. [DOI: 10.1097/bco.0000000000000924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Risitano S, Sabatini L, Barberis L, Fusini F, Malavolta M, Indelli PF. Combining kinematic alignment and medial stabilized design in total knee arthroplasty: Basic rationale and preliminary clinical evidences. J Orthop 2020; 21:427-431. [PMID: 32943829 DOI: 10.1016/j.jor.2020.08.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 08/23/2020] [Indexed: 10/23/2022] Open
Abstract
Objective: kinematic alignment technique has been recently described as a new surgical procedure able to restore the patient specific physiological knee alignment; furthermore, new prosthesis, as medial stabilized (MS) third generation TKA, were designed to better reproduce the anatomical shape of the knee. In this prospective study, the authors evaluated early clinical improvement and radiological outcomes of patients having pre-operative small coronal limb deformity underwent TKA using a surgical technique combining a "restricted kinematic alignment" with medial stabilized polyethylene insert. Methods Fifteen consecutive patients (8 female and 7 male) scheduled for a total knee replacement have been enrolled for this study and treated using a modern third generation knee implant with a medial congruent tibial polyethylene. Clinical improvements have been assessed pre-operatively and at 6 and 12 months Follow up (FU) using the Oxford knee Score (OKS)( Ishikawa et al., Jun. 2015) 12 the Knee Society Score (KSS)( Pinskerova and et al., Aug. 2004) 13 and Forgotten Joint Score (FJS) as patient reported outcomes measurement system (PROMs). A radiological evaluation was made by a single physician at 6 months. Results Average improvement in OKS was from 20.2 (SD 5.5) pre-operatively to 41.3 (SD 2.1) at the final FU. KSS pain/motion improved with a mean score from 40.1 (SD 4.0) pre-op to 89.1 (SD 6.3) while KSS function improved with an average score from 51.0 (SD 6.2) pre-op to 81.8 (SD 8.4) showing good to excellent results in all the knee treated. The mean FJS at 6 months follow up was 75.1 (SD 4.2) improving to 79.3 (SD 3.3) at one year FU. Post-operative XR showing an average varus Hip-Knee-Ankle (HKA) angle of 178.8° (range from 176° to 182°, SD 2,3°); We found no statistically significant difference between pre-operative and post-operative HKA (p < 0,05). Conclusion The current authors assumed appropriate to combine a modern TKA implant designed replicating the anatomical shape of the native knee with a surgical technique able to better reproduce the physiological, patient specific, knee biomechanics. Our findings suggest that combining MS implant with KA technique may results in better short-term functional results, helping the patient to "forget" their replaced joint and restoring their pre-arthritic quality of life.
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Affiliation(s)
- Salvatore Risitano
- Department of Orthopaedic Surgery and Traumatology, "Maggiore" Hospital of Chieri, Chieri, Turin, Italy.,Department of Orthopaedic Surgery and Bioengineering, Stanford University School of Medicine and the Palo Alto Veterans Affairs Health Care System(PAVAHCS), Palo Alto, CA, USA
| | - Luigi Sabatini
- Department of Orthopaedic Surgery and Traumatology. University of Turin. "Città della salute e della scienza"-CTO Hospital of Turin. Turin, Italy
| | - Luca Barberis
- Department of Orthopaedic Surgery and Traumatology. University of Turin. "Città della salute e della scienza"-CTO Hospital of Turin. Turin, Italy
| | - Federico Fusini
- Department of Orthopaedic Surgery and Traumatology. University of Turin. "Città della salute e della scienza"-CTO Hospital of Turin. Turin, Italy
| | - Michele Malavolta
- Knee Department, Paolo Pederzoli Private Hospital, Peschiera del Garda, Verona, Italy
| | - Pier Francesco Indelli
- Department of Orthopaedic Surgery and Bioengineering, Stanford University School of Medicine and the Palo Alto Veterans Affairs Health Care System(PAVAHCS), Palo Alto, CA, USA
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Indelli PF, Risitano S, Hall KE, Leonardi E, Migliore E. Effect of polyethylene conformity on total knee arthroplasty early clinical outcomes. Knee Surg Sports Traumatol Arthrosc 2019; 27:1028-1034. [PMID: 30328496 DOI: 10.1007/s00167-018-5170-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Accepted: 09/21/2018] [Indexed: 11/25/2022]
Abstract
PURPOSE Total knee arthroplasty is a successful procedure in treating subjects with end-stage knee osteoarthritis. The objective of this matched study was to evaluate subjective patient satisfaction and clinical and radiological outcomes in two groups of patients undergoing primary TKA using an identical third-generation design with different conformity in the polyethylene insert. METHODS One hundred consecutive patients undergoing TKA because of knee osteoarthritis were randomized in two matched groups. Group A included 50 Posterior-Stabilized (PS) implants, while group B included 50 Medially Congruent (MC) implants. The surgical technique was identical: gap balancing in extension and measured resection in flexion; cruciate ligaments were always removed; the coronal alignment followed the mechanical axis and the tibial slope was set at 3° in the PS group and 5° in the MC. Oxford Knee Score (OKS) and Knee Society Score (KSS) were assessed preoperatively and at 2 year minimum follow-up. Two-sample T test statistical analysis was performed. RESULTS All patients were available at final follow-up: there were no preoperative statistical differences between the two groups in the average preoperative ROM (PS 112°, MC 108°; n.s.), average preoperative KSS (PS 64.4, MC 63.7; n.s.), average preoperative OKS (PS 19.6; MC 19.0; n.s.), and average BMI (PS 34.40, MC 34.60; n.s.). At final follow-up, there were no statistical differences between the two groups in the average OKS (PS 40,5; MC 41.1; n.s.) and in the average KSS (PS 161,5, MC 165,7; n.s.). We found a statistically but not clinically significant difference at final ROM: the average maximum active flexion was 120° in the PS group and 123° in the MC group (s.s.). CONCLUSION This study evaluated two biomechanically different polyethylene inserts in the same TKA design, showing that reducing the level of intra-articular conformity had minimal effects on PROMs and objective short-term clinical results but a potentially beneficial effect on ROM. This study suggests that, once a satisfactory intra-operative stability is obtained, the minimal level of constraint should be used. LEVEL OF EVIDENCE III.
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Affiliation(s)
- Pier Francesco Indelli
- Department Orthopaedic Surgery and Bioengineering, Stanford University School of Medicine, Stanford, USA.
- PAVAHCS, Surgical services, 1801 Miranda Ave, Palo Alto, CA, 94304, USA.
| | - Salvatore Risitano
- Department Orthopaedic Surgery and Bioengineering, Stanford University School of Medicine, Stanford, USA
- PAVAHCS, Surgical services, 1801 Miranda Ave, Palo Alto, CA, 94304, USA
| | - Kimberly E Hall
- Department Orthopaedic Surgery and Bioengineering, Stanford University School of Medicine, Stanford, USA
- PAVAHCS, Surgical services, 1801 Miranda Ave, Palo Alto, CA, 94304, USA
| | - Erika Leonardi
- Department Orthopaedic Surgery and Bioengineering, Stanford University School of Medicine, Stanford, USA
- PAVAHCS, Surgical services, 1801 Miranda Ave, Palo Alto, CA, 94304, USA
| | - Eleonora Migliore
- Department Orthopaedic Surgery and Bioengineering, Stanford University School of Medicine, Stanford, USA
- PAVAHCS, Surgical services, 1801 Miranda Ave, Palo Alto, CA, 94304, USA
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The original Akagi line is the most reliable: a systematic review of landmarks for rotational alignment of the tibial component in TKA. Knee Surg Sports Traumatol Arthrosc 2019; 27:1018-1027. [PMID: 30203197 DOI: 10.1007/s00167-018-5131-z] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 09/05/2018] [Indexed: 10/28/2022]
Abstract
PURPOSE There is no present consensus on the most reliable anatomical landmarks or axes for tibial rotational alignment in total knee arthroplasty (TKA). The goal was therefore to review the literature and compare accuracy and repeatability of different axes for tibial baseplate rotation in TKA. METHODS Medline and Embase were searched for articles that reported accuracy in terms of error or discrepancy from the trans-epicondylar axes (TEA), and/or repeatability in terms of intraclass correlation coefficient, of one or more axes used for tibial baseplate rotation in TKA. Twenty-one articles met criteria, and their data were extracted and tabulated. RESULTS The selected articles evaluated 15 different axes, 13 for reliability, 12 for repeatability. The lowest errors or discrepancies from the projected TEA were reported for the original 'Akagi line' (posterior cruciate ligament posteriorly to medial border of tibial tuberosity), its variant using the sulcus of the tibial spines as anterior landmark, as well as the anterior tibial border and the curve-on-curve technique. The best inter-observer repeatabilities were reported for 'Akagi line' variants that use the geometric centre of the tibial plateau posteriorly and the medial border of the tibial tuberosity, or the medial sixth of the patellar tendon anteriorly. Considering accuracy and repeatability simultaneously, only two axes were found to satisfy both criteria consistently: the original 'Akagi line' and the anterior tibial border. CONCLUSIONS Because of the small number of studies found, the collected evidence remains insufficient to recommend reference axes for intra-operative rotational alignment of the tibial baseplate in TKA. A combination of two or more anatomical landmarks or projected axes could be used to ensure adequate tibial baseplate rotation, while considering individual patient morphology and implant design to optimize knee kinematics and prevent prosthetic overhang. LEVEL OF EVIDENCE Level IV, systematic review of level III and IV studies.
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Amanatullah DF, Pallante GD, Ollivier MP, Hooke AW, Abdel MP, Taunton MJ. Experience Influences the Agreement and Reliability of Tibial Component Positioning in Total Knee Arthroplasty. J Arthroplasty 2018; 33:1231-1234. [PMID: 29224992 DOI: 10.1016/j.arth.2017.11.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 10/24/2017] [Accepted: 11/03/2017] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND Poor rotation of the tibial component is associated with unfavorable total knee arthroplasty outcomes. Some surgeons utilize the tibial tubercle (TT method), while others utilize the femoral cam (Box method) as a rotational landmark during total knee arthroplasty. Our purpose is to determine the reproducibility of 2 methods for establishing intra-operative tibial component rotation, while also comparing the effect of level of training. METHODS Twelve surgeons positioned and sized a symmetric tibial component on 7 cadaver knees. Surgeons were allowed to utilize their preferred method for establishing tibial component rotation. Seven surgeons selected the TT method, 4 utilized the Box method, and 1 used both methods depending on the specimen. Repeat measurements were completed by each surgeon after a rest period. The differences between tibial tray positions were assessed using computer-assisted optoelectronic measurements. Intra-class correlation coefficients were calculated to determine inter-observer agreement (IOA) and intra-rater reliability (IRR). RESULTS Overall, both the Box method and the TT method demonstrated high IRR for tibial component rotation. Experienced surgeons were more consistent at establishing component rotation regardless of technique. Trainees were more consistent when utilizing the Box method (IRR 0.96, IOA 0.94) than the TT method (IRR 0.71, IOA 0.72). CONCLUSION Surgeon experience influences the agreement and reliability of tibial component position. For less experienced surgeons, the Box method was more effective than the TT method for consistently reproducing tibial component rotation.
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Affiliation(s)
| | - Graham D Pallante
- Department of Orthopaedic Surgery, Mayo Clinic, Rochester, Minnesota
| | | | - Alexander W Hooke
- Department of Orthopaedic Surgery, Mayo Clinic, Rochester, Minnesota
| | - Matthew P Abdel
- Department of Orthopaedic Surgery, Mayo Clinic, Rochester, Minnesota
| | - Michael J Taunton
- Department of Orthopaedic Surgery, Mayo Clinic, Rochester, Minnesota
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13
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The Evolution of Total Knee Component Design Follows Anatomic Morphology. Tech Orthop 2018. [DOI: 10.1097/bto.0000000000000272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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Sabatini L, Risitano S, Parisi G, Tosto F, Indelli PF, Atzori F, Massè A. Medial Pivot in Total Knee Arthroplasty: Literature Review and Our First Experience. CLINICAL MEDICINE INSIGHTS-ARTHRITIS AND MUSCULOSKELETAL DISORDERS 2018; 11:1179544117751431. [PMID: 29326531 PMCID: PMC5758963 DOI: 10.1177/1179544117751431] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 12/07/2017] [Indexed: 01/26/2023]
Abstract
Background: Traditional total knee implants designs, usually, are not able to reproduce the physiological kinematics of the knee, leaving almost 20% of the patients, those who underwent a total knee arthroplasty (TKA), not fully satisfied. Modern inserts are nowadays designed with a fully congruent medial compartment to reproduce the normal medial pivoting biomechanics of the knee. The aim of this article was to evaluate preliminary clinical improvement using the Medial Congruent (MC) insert as specific level of constraint. Materials and methods: A total of 10 consecutive patients have been enrolled in this study and treated using an MC tibial polyethylene insert. The Oxford Knee Score (OKS) and the Knee Society Score (KSS) have been assessed preoperatively and at 3-month, 6-month, and 1-year follow-up (FU) and used as validated measurements to evaluate early clinical improvements. Postoperative radiological examination was reviewed looking for radiolucent lines or loosening of the components. Results: Average improvement in OKS was from 19.5 to 41.2, whereas KSS improved with an average score from 64.7 preoperatively to 167.5 at the final FU showing good to excellent results in 95% of the treated knees. Evaluating the range of motion, the average maximum active movement was 124° and none of the patients needing for a revision surgery or manipulation under anesthesia. No complications were observed at the final FU as septic or aseptic loosening or vascular or neurologic injury. Discussion and conclusions: Medial Congruent insert showed good to excellent clinical results at 1-year FU. Range of motion and subjective outcomes were satisfying and comparable with results obtained in literature using traditional TKA design.
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Affiliation(s)
- Luigi Sabatini
- Department of Orthopaedics and Traumatology, Città della Salute e della Scienza di Torino, CTO Hospital, Turin, Italy
| | | | | | | | - Pier Francesco Indelli
- Department of Orthopaedic Surgery, Stanford University School of Medicine, Palo Alto, CA, USA
| | | | - Alessandro Massè
- Department of Orthopaedics and Traumatology, Città della Salute e della Scienza di Torino, CTO Hospital, Turin, Italy
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15
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Risitano S, Karamian B, Indelli PF. Intraoperative load-sensing drives the level of constraint in primary total knee arthroplasty: Surgical technique and review of the literature. J Clin Orthop Trauma 2017; 8:265-269. [PMID: 28951645 PMCID: PMC5605726 DOI: 10.1016/j.jcot.2017.06.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 06/01/2017] [Accepted: 06/01/2017] [Indexed: 11/23/2022] Open
Abstract
Total knee arthroplasty is a traditional surgical procedure aimed to restore function and relief pain in patients with severe knee osteoarthritis. Recently, many medial pivot knee systems were deigned to replicate the normal knee kinematic: a highly congruent medial compartment and a less conforming lateral tibial plateau characterize these devices. A slightly asymmetric soft tissue balancing is mandatory using medial pivot designs to obtain a correct and physiological knee biomechanics leading good outcomes and long survival rates. This article describes a new surgical technique using a modern third generation TKA design combined with wireless load-sensor tibial trials to improve the correct knee load balancing with a minimal conformity of the polyethylene insert. The use of wireless load-sensing tibial trials has several benefits: it is an intraoperative, objective and dynamic tool allowing surgeons to optimize in real time soft tissue balancing. The meaning of a "truly balanced knee" is still a controversial issue in the current literature.
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Affiliation(s)
| | | | - Pier Francesco Indelli
- Department of Orthopaedic Surgery and Bioengineering, Stanford University School of Medicine and the Palo Alto Veterans Affairs Health Care System (PAVAHCS), Palo Alto, CA, USA
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Indelli PF, Graceffa A, Marcucci M, Baldini A. Rotational alignment of the tibial component in total knee arthroplasty. ANNALS OF TRANSLATIONAL MEDICINE 2016; 4:3. [PMID: 26855939 DOI: 10.3978/j.issn.2305-5839.2015.12.03] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Many surgical techniques, correlated to different anatomical landmarks, have been proposed to allow a satisfactory rotational alignment of the tibial component in primary total knee arthroplasty (TKA). Unfortunately, an accurate landmark has not yet been established although many computer models using CT reconstructions and standard radiologic studies have been performed. In this review article, the authors propose a new anatomical rotational reference for a correct positioning of the tibial component during primary TKA; the authors compared the results of their studies with the current literature on rotational alignment references and previously proposed surgical techniques. The authors also analyzed the correlation between classic and newer tibial baseplate designs and different tibial rotational landmarks.
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Affiliation(s)
- Pier Francesco Indelli
- 1 Department of Orthopaedic Surgery, Stanford University School of Medicine and the Palo Alto Veterans Affairs Health Care System (PAVAHCS), Palo Alto, CA 94304, USA ; 2 Clinica Ortopedica Universita' degli Studi di Firenze - CESAT, Fucecchio, Italy ; 3 Orthopaedics Unit, IFCA Clinic, Firenze, Italy
| | - Angelo Graceffa
- 1 Department of Orthopaedic Surgery, Stanford University School of Medicine and the Palo Alto Veterans Affairs Health Care System (PAVAHCS), Palo Alto, CA 94304, USA ; 2 Clinica Ortopedica Universita' degli Studi di Firenze - CESAT, Fucecchio, Italy ; 3 Orthopaedics Unit, IFCA Clinic, Firenze, Italy
| | - Massimiliano Marcucci
- 1 Department of Orthopaedic Surgery, Stanford University School of Medicine and the Palo Alto Veterans Affairs Health Care System (PAVAHCS), Palo Alto, CA 94304, USA ; 2 Clinica Ortopedica Universita' degli Studi di Firenze - CESAT, Fucecchio, Italy ; 3 Orthopaedics Unit, IFCA Clinic, Firenze, Italy
| | - Andrea Baldini
- 1 Department of Orthopaedic Surgery, Stanford University School of Medicine and the Palo Alto Veterans Affairs Health Care System (PAVAHCS), Palo Alto, CA 94304, USA ; 2 Clinica Ortopedica Universita' degli Studi di Firenze - CESAT, Fucecchio, Italy ; 3 Orthopaedics Unit, IFCA Clinic, Firenze, Italy
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