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Yıldırım C, Demirel M, Ekinci M, Öztürk S, Bozdağ SE. Biomechanical Comparison of Uniplanar versus Biplanar Lateral Opening-wedge Distal Femoral Osteotomy Techniques in Terms of Risk for Medial Hinge Fracture. J Knee Surg 2024; 37:623-630. [PMID: 38113914 DOI: 10.1055/a-2232-4971] [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: 12/21/2023]
Abstract
The effect of osteotomy type on the initial stiffness of the bone-implant construct in lateral opening-wedge distal femoral osteotomy (LOWDFO) using a uniplanar compared with a biplanar technique has been investigated. However, no study has explored the biomechanical risk factors for medial hinge fracture. This study aimed to compare the biomechanical strength of uniplanar versus biplanar LOWDFO regarding the risk for medial hinge fracture during gap opening. Twelve composite femora were divided into two groups (six in each group) based on the distal femoral osteotomy technique: uniplanar versus biplanar LOWDFO. All LOWDFO models were subjected to incremental static loading. The gap distance was expanded by 1 mm, and displacement values were recorded as anterior and posterior gap distances (mm). The average force values of all samples at certain gap distances were recorded, and the head distance was measured. The uniplanar group had higher load values than the biplanar group at all anterior gap distances. These differences were only significant at 2- and 3-mm gap distances (p = 0.025 and 0.037). At all posterior gap distances, the uniplanar group had higher load values than the biplanar group, but these differences only reached statistical significance at 2 mm (p = 0.037). Both groups had similar anterior, posterior, and average gap distances (p = 0.75, 0.522, 0.873). The uniplanar group had a higher head insertion distance (15.3 ± 5.7) than the biplanar group (14.7 ± 2.9), but it was not significant (p = 0.87). The uniplanar group had a lower average load before medial hinge fracture (46.41 ± 13.91 N) than the biplanar group (54.92 ± 31.94, p = 0.81). The biplanar group had an average maximum load value of 64.18 ± 25.6 N, while the uniplanar group had 57.90 ± 12.21 N (p = 0.81). This study revealed that the biplanar osteotomy technique allows a wider opening wedge gap with less risk of a medial hinge fracture than uniplanar LOWDFO.Level of evidence was level 3, case-control series.
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Affiliation(s)
- Cem Yıldırım
- Department of Orthopedics and Traumatology, Basaksehir Cam and Sakura City Hospital, Istanbul, Turkey
| | - Mehmet Demirel
- Department of Orthopedics and Traumatology, İstanbul University, Istanbul School of Medicine, Istanbul, Turkey
| | - Mehmet Ekinci
- Department of Orthopedic and Traumatology, Haseki Training and Research Hospital, Istanbul, Turkey
| | - Simge Öztürk
- Mechanical Engineering Faculty, Istanbul Technical University, Istanbul, Turkey
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Sano S, Matsushita T, Nagata N, Tokura T, Nukuto K, Nakanishi Y, Nishida K, Nagai K, Kanzaki N, Hoshino Y, Matsumoto T, Kuroda R. Morphological analysis of the distal femur as a surgical reference in biplane distal femoral osteotomy. Sci Rep 2024; 14:12130. [PMID: 38802483 PMCID: PMC11130220 DOI: 10.1038/s41598-024-62988-y] [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] [Received: 02/06/2024] [Accepted: 05/23/2024] [Indexed: 05/29/2024] Open
Abstract
Distal femoral osteotomy (DFO) is performed alone or with high tibial osteotomy (HTO) for patients with osteoarthritis and distal femur deformities. DFO is technically demanding, particularly when creating an anterior flange. Herein, we examined the morphological characteristics of the distal femur based on the cortical shape as a surgical reference for biplanar DFO. Computed tomography images of 50 valgus and 50 varus knees of patients who underwent biplanar DFO or total knee arthroplasty were analyzed. Axial slices at the initial level of the transverse osteotomy in the DFO and slices 10 mm proximal and 10 mm distal to that level were selected. The medial and lateral cortical angles and heights (MCLA, LCLA, MCH, and LCH) were measured on axial slices. Statistical comparisons were performed between the medial and lateral cortices and valgus and varus knees. MCLA and MCH were significantly smaller and lower, respectively, than LCLA and LCH (P < 0.01). The MCLA and MCH of varus knees were significantly smaller and lower, respectively, than those of valgus knees (P < 0.01). Surgeons should carefully observe morphological differences in the distal femur cortex, distinguishing between medial and lateral knees and varus and valgus knees during the creation of the anterior flange in the DFO.
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Affiliation(s)
- Shohei Sano
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe, 650-0017, Japan
| | - Takehiko Matsushita
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe, 650-0017, Japan.
| | - Naosuke Nagata
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe, 650-0017, Japan
| | - Takeo Tokura
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe, 650-0017, Japan
| | - Koji Nukuto
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe, 650-0017, Japan
| | - Yuta Nakanishi
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe, 650-0017, Japan
| | - Kyohei Nishida
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe, 650-0017, Japan
| | - Kanto Nagai
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe, 650-0017, Japan
| | - Noriyuki Kanzaki
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe, 650-0017, Japan
| | - Yuichi Hoshino
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe, 650-0017, Japan
| | - Tomoyuki Matsumoto
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe, 650-0017, Japan
| | - Ryosuke Kuroda
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe, 650-0017, Japan
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Chen KJ, Hsiung W, Wang CY, Lee OKS, Huang KK, Huang Y, Yang JCS. Comparison of double chevron-cut and biplanar distal femoral osteotomy techniques: A biomechanical study. PLoS One 2024; 19:e0296300. [PMID: 38635518 PMCID: PMC11025861 DOI: 10.1371/journal.pone.0296300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Accepted: 12/10/2023] [Indexed: 04/20/2024] Open
Abstract
OBJECTIVE This study aimed to compare the stability and mechanical properties of the double chevron-cut (DCC) and biplanar (BP) distal femoral osteotomy (DFO) techniques, along with analyzing their respective contact surface areas. METHODS Biomechanical testing was performed using sawbone and 3D modeling techniques to assess axial and torsional stability, torsional stiffness, and maximum torque of both osteotomy configurations. Additionally, 3D models of the sawbone femur were created to calculate and compare the contact surface area of the DCC, BP, and conventional single-plane DFO techniques. RESULTS Axial stiffness and maximum strength did not significantly differ between the two osteotomy techniques. However, in terms of torsional properties, the DCC technique exhibited superior torsional stiffness compared to the BP group (27 ± 7.7 Nm/° vs. 4.5 ± 1.5 Nm/°, p = 0.008). Although the difference in maximum torque did not reach statistical significance (63 ± 10.6 vs. 56 ± 12.1, p = 0.87), it is noteworthy that the DCC group sawbone model exhibited fracture in the shaft region instead of at the osteotomy site. Therefore, the actual maximum torque of the DCC construct may not be accurately reflected by the numerical values obtained in this study. The contact surface area analysis revealed that the BP configuration had the largest contact surface area, 111% larger than that of the single-plane configuration. but 60% of it relied on the less reliable axial cut. Conversely, the DCC osteotomy offered a 31% larger contact surface area than the single-plane configuration, with both surfaces being weight-bearing. CONCLUSION The DCC osteotomy exhibited superior mechanical stability, showing improved rotational stiffness and maximum torque when compared to the BP osteotomy. Although the BP osteotomy resulted in a larger contact surface area than the DCC osteotomy, both were larger than the conventional single-plane configuration. In clinical practice, both the DCC and BP techniques should be evaluated based on patient-specific characteristics and surgical goals.
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Affiliation(s)
- Kuan-Jung Chen
- Department of Orthopaedics, China Medical University Hsinchu Hospital, Hsinchu, Taiwan
- Department of Orthopaedics, School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Wei Hsiung
- Department of Orthopaedics, School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
- Department of Orthopaedics, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan
| | - Chien-Yuan Wang
- Department of Orthopaedics, China Medical University Hsinchu Hospital, Hsinchu, Taiwan
- Department of Orthopaedics, College of Medicine, China Medical University, Taichung, Taiwan
| | - Oscar Kuang-Sheng Lee
- Department of Orthopaedics, College of Medicine, China Medical University, Taichung, Taiwan
- Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
- Center for Translational Genomics and Regenerative Medicine, China Medical University Hospital, Taichung, Taiwan
- Stem Cell Research Center, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Kuo-Kuang Huang
- Department of Information Science, National Penghu University of Science and Technology, Penghu, Taiwan
| | - Ye Huang
- Department of Orthopedics, Knee Preservation Clinical and Research Center, Beijing Jishuitan Hospital, Beijing, China
| | - Jesse Chieh-Szu Yang
- Department of Orthopaedics, School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
- Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
- Department of Orthopaedics and Traumatology, Taipei Veterans General Hospital, Taipei, Taiwan
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Wu Y, Jin X, Zhao X, Wang Y, Bai H, Lu B, Tong X, Ma J, Ma X. Computer-aided Design of Distal Femoral Osteotomy for the Valgus Knee and Effect of Correction Angle on Joint Loading by Finite Element Analysis. Orthop Surg 2022; 14:2904-2913. [PMID: 36151783 PMCID: PMC9627055 DOI: 10.1111/os.13440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 07/15/2022] [Accepted: 07/16/2022] [Indexed: 11/30/2022] Open
Abstract
Objective Lateral open‐wedge distal femoral osteotomy (DFO) has been used to treat valgus deformity of the knee, with good clinical outcomes. However, there is a lack of biomechanical studies regarding the angle of correction. The objective of this study was to apply computer‐aided design (CAD) for osteotomy planning in a three‐dimensional (3D) anatomical model and to assess the biomechanical differences among the varying correction angles on joint loading by finite element analysis (FEA). Methods To model different angles of lateral open‐wedge DFO correction, the CAD software package Mimics 21.0 was used to accurately simulate the operated knee. The femur was cut to 0°, 2°, 4°, 6°, 8°, and 10° of varus (equivalent to hip‐knee‐ankle angles of 180°, 178°, 176°, 174°, 172°, and 170°, respectively). The original knee model and the corrected models were processed by FE software. Then, the FE models were subjected to an axial force to obtain the von Mises stress (VMS) and shear stress distributions within the femoral cartilages and menisci. Results Under a compressive load of 740 N, the highest VMS in lateral and medial compartments of the intact knee model was 3.418 and 3.303 MPa. The maximum value of both the VMS and the shear stress in the lateral compartment decreased as the varus angle increased, but the corresponding values in the medial compartment increased. When the hip‐knee‐ankle (HKA) angle was 180°, the VMS in the lateral and medial compartments was balanced (3.418 and 3.303 MPa, respectively). Meanwhile, when the HKA angle was 178° (3.488 and 3.625 MPa, respectively), the shear stress in the lateral and medial compartments was balanced. In addition, the magnitude of change in the stress was significantly higher in the medial compartment (90.9%) than in the lateral compartment (19.3%). Conclusion The optimal correction angle of the valgus knee is close to neutral alignment or slightly varus (0° ‐ 2°). Overcorrection is not recommended, as it can result in a steep increase of the stress within the medial compartment and may accelerate the process of medial compartment OA.
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Affiliation(s)
- Yanfei Wu
- Clinical College of Orthopedics, Tianjin Medical University, Tianjin, China.,Tianjin Hospital, Tianjin University, Tianjin, China
| | - Xin Jin
- Tianjin Hospital, Tianjin University, Tianjin, China
| | - Xingwen Zhao
- Clinical College of Orthopedics, Tianjin Medical University, Tianjin, China.,Tianjin Hospital, Tianjin University, Tianjin, China
| | - Ying Wang
- Tianjin Hospital, Tianjin University, Tianjin, China
| | - Haohao Bai
- Tianjin Hospital, Tianjin University, Tianjin, China
| | - Bin Lu
- Tianjin Hospital, Tianjin University, Tianjin, China
| | - Xue Tong
- Tianjin Hospital, Tianjin University, Tianjin, China
| | - Jianxiong Ma
- Tianjin Hospital, Tianjin University, Tianjin, China
| | - Xinlong Ma
- Clinical College of Orthopedics, Tianjin Medical University, Tianjin, China.,Tianjin Hospital, Tianjin University, Tianjin, China
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刘 云, 谢 雪, 罗 从. [Research progress of osteotomy around knee in the treatment of valgus knee osteoarthritis]. ZHONGGUO XIU FU CHONG JIAN WAI KE ZA ZHI = ZHONGGUO XIUFU CHONGJIAN WAIKE ZAZHI = CHINESE JOURNAL OF REPARATIVE AND RECONSTRUCTIVE SURGERY 2022; 36:111-116. [PMID: 35038808 PMCID: PMC8844620 DOI: 10.7507/1002-1892.202108009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 11/01/2021] [Indexed: 06/14/2023]
Abstract
OBJECTIVE To review the research progress of surgical methods of osteotomy around the knee in the treatment of valgus knee osteoarthritis. METHODS The relevant literature on the surgical treatment of valgus knee osteoarthritis at home and abroad in recent years was reviewed, and the advantages, disadvantages, and effectiveness of different surgical methods of osteotomy around the knee were summarized. RESULTS For young and active patients with symptomatic valgus knee osteoarthritis, osteotomy around the knee is a safe and reliable treatment option. At present, the main surgical methods include medial closing wedge distal femoral osteotomy, lateral opening wedge distal femoral osteotomy, medial closing wedge high tibial osteotomy, and lateral opening wedge high tibial osteotomy. The indications, advantages, and disadvantages of different osteotomies are different, and the selection of appropriate surgical method is the key to achieve good effectiveness. CONCLUSION There are many osteotomies in the treatment of valgus knee osteoarthritis. In order to achieve good results, improve survival rate, and reduce postoperative complications, the most reasonable surgical strategy needs to be developed according to different situations.
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Affiliation(s)
- 云飞 刘
- 南京医科大学附属苏州科技城医院骨科(江苏苏州 215000)Department of Orthopedics, the Affiliated Suzhou Science & Technology Town Hospital of Nanjing Medical University, Suzhou Jiangsu, 215000, P. R. China
| | - 雪涛 谢
- 南京医科大学附属苏州科技城医院骨科(江苏苏州 215000)Department of Orthopedics, the Affiliated Suzhou Science & Technology Town Hospital of Nanjing Medical University, Suzhou Jiangsu, 215000, P. R. China
| | - 从风 罗
- 南京医科大学附属苏州科技城医院骨科(江苏苏州 215000)Department of Orthopedics, the Affiliated Suzhou Science & Technology Town Hospital of Nanjing Medical University, Suzhou Jiangsu, 215000, P. R. China
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