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Tomonaga S, Yoshimura I, Hagio T, Ishimatsu T, Sugino Y, Fukagawa R, Taniguchi Y, Yamamoto T. Return to Sports Activity After Microfracture for Osteochondral Lesion of the Talus in Skeletally Immature Children. Foot Ankle Int 2024:10711007241241067. [PMID: 38571306 DOI: 10.1177/10711007241241067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/05/2024]
Abstract
BACKGROUND Osteochondral lesions of the talus (OLTs) are among the common sports-related injuries. However, there are few reports on the return to sports after OLT surgery in skeletally immature children. This study was performed to evaluate the return to sports after microfracture for OLTs in skeletally immature children. METHODS This study involved 17 ankles of 16 patients (mean age, 13.2 years; range, 10-16 years) with open tibial epiphyses on magnetic resonance imaging (MRI) who underwent microfracture for OLTs <10 mm in diameter and confirmation of lesion instability under arthroscopy. Nine of 17 ankles had additional lateral ankle ligament stabilization. All patients were participating in some form of sports. The Japanese Society for Surgery of the Foot (JSSF) score, Ankle Activity Score (AAS), return to sports rate, lesion size, grade of subchondral bone marrow edema, and Magnetic Resonance Observation of Cartilage Repair Tissue (MOCART) score on MRI were evaluated after microfracture. The mean postoperative follow-up period was 53.5 months. RESULTS The mean JSSF score significantly improved from 76.1 points preoperatively to 94.9 points at the final follow-up (P < .01). The mean AAS showed no change from preoperative state to final follow-up. The return to sports rate was 100%. The lesion size significantly decreased from 76.3 to 56.7 mm2 in area (P = .02) and from 283.2 to 185.6 mm3 in volume (P = .05). The bone marrow edema grade decreased in 8 of 17 ankles. The total MOCART score showed a significant improvement from 6 months to 1 year postoperatively (P = .05). CONCLUSION All skeletally immature children who underwent microfracture for OLTs in this study were able to return to sports activity and showed improvements in clinical scores and MRI parameters. Microfracture may be considered an effective first-line treatment for OLTs <10 mm in diameter in skeletally immature athletes. LEVEL OF EVIDENCE Level IV, retrospective case-control study.
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Affiliation(s)
- Seiya Tomonaga
- Department of Orthopaedic Surgery, Fukuoka University Faculty of Medicine, Jonan-ku, Fukuoka, Japan
| | - Ichiro Yoshimura
- Faculty of Sports and Health Science, Fukuoka University, Jonan-ku, Fukuoka, Japan
| | - Tomonobu Hagio
- Department of Orthopaedic Surgery, Fukuoka University Faculty of Medicine, Jonan-ku, Fukuoka, Japan
| | - Tetsuro Ishimatsu
- Department of Orthopaedic Surgery, Fukuoka University Faculty of Medicine, Jonan-ku, Fukuoka, Japan
| | - Yuki Sugino
- Department of Orthopaedic Surgery, Fukuoka University Faculty of Medicine, Jonan-ku, Fukuoka, Japan
| | - Ryo Fukagawa
- Department of Orthopaedic Surgery, Fukuoka University Faculty of Medicine, Jonan-ku, Fukuoka, Japan
| | - Yoshimasa Taniguchi
- Department of Orthopaedic Surgery, Fukuoka University Faculty of Medicine, Jonan-ku, Fukuoka, Japan
| | - Takuaki Yamamoto
- Department of Orthopaedic Surgery, Fukuoka University Faculty of Medicine, Jonan-ku, Fukuoka, Japan
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Badell JS, Cottom JM. Postoperative Magnetic Resonance Evaluation of Anterior Talofibular Ligament Following Arthroscopic Brostrom Procedure: Analysis and Outcomes of 40 Repairs at 12 Months. J Foot Ankle Surg 2024; 63:250-255. [PMID: 38061624 DOI: 10.1053/j.jfas.2023.11.012] [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: 08/08/2023] [Revised: 11/15/2023] [Accepted: 11/23/2023] [Indexed: 01/06/2024]
Abstract
Lateral ankle sprains are one of the most common orthopedic injuries. When conservative treatment fails, surgical correction is often performed using either open or arthroscopic techniques. We hypothesize that MRI evaluation of the arthroscopic brostrom repair will show intact repair and decrease in thickness of the anterior talofibular ligament (ATFL) at 1 year, with statistically significant improvement of patient function and pain scores. Postoperative MRI was utilized at minimum 1-year follow-up to evaluate the integrity of the arthroscopic brostrom repair, as well as comparison of ATFL thickness to literature validated average thickness. A musculoskeletal fellowship trained radiologist performed all MRI reads. In addition, 3 fellowship trained foot and ankle specialists from a single institution all performed measurements of the ATFL. Surgical satisfaction using 1 to 100 scale, and Karlsson-Peterson (KP) were measured at 1 year postoperatively. In addition, pre- and postoperative Foot Function Index (FFI), American Orthopedic Foot and Ankle (AOFAS) hindfoot scores, and Visual Analog Scale (VAS) were measured using unpaired t tests. All repairs were shown to be intact at minimum 1-year follow-up via MRI evaluation, with ATFL thickness of 2.21 mm. Preoperative FFI, AOFAS, and VAS were 54.9, 46.4, and 7.1 respectively. Postoperative scores were 11.0, 91.7, and 1.3 respectively. Surgical satisfaction was 88.2, KP was 75.3. Comparison of pre- and postoperative scores (VAS, FFI, AOFAS) were shown to be statistically significant, p < .05. No significant difference in demographic data was observed at 1 year. The data from this study offers evidence that the arthroscopic brostrom repair provides patients with good outcomes as well as an intact ATFL with normal morphology at 1 year postoperatively.
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Affiliation(s)
- Jay S Badell
- Florida Orthopedic Foot & Ankle Center, Sarasota, FL.
| | - James M Cottom
- Director, Florida Orthopedic Foot & Ankle Center Fellowship, Sarasota, FL
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Lee TY, Chen PY, Yang KC, Tzeng IS, Ming Chang C, Wang CC. Comparison of Knot-Tying Techniques During the Arthroscopic Broström-Gould Procedure: Semiconstrained Freehand Versus Knot Pusher Techniques. Orthop J Sports Med 2024; 12:23259671231218649. [PMID: 38274016 PMCID: PMC10809873 DOI: 10.1177/23259671231218649] [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: 06/20/2023] [Accepted: 06/29/2023] [Indexed: 01/27/2024] Open
Abstract
Background The arthroscopic Broström technique with or without Gould modification has been used to treat patients with anterior talofibular ligament injury who failed nonoperative management and progressed to chronic lateral ankle instability. However, some patients develop limited range of motion over the ankle joint postoperatively. Purpose/Hypothesis To compare the clinical outcomes and midterm functional performance of knot-tying techniques between using a knot pusher and a semiconstrained freehand tie during arthroscopic Broström-Gould procedure with inferior extensor retinaculum (IER) augmentation. It was hypothesized that the semiconstrained freehand tie would provide better plantarflexion of the ankle joint compared with the knot pusher. Study Design Cohort study; Level of evidence, 3. Methods Included were 135 consecutive patients with mild-to-moderate lateral ankle instability (mean age, 42.7 years; range, 16-78 years) who underwent an arthroscopic Broström-Gould procedure from March 1, 2016, to April 30, 2022. The patients were divided into 2 groups according to the tying technique used in the Gould modification: surgical tie using a knot pusher (KP group; n = 30) or a semiconstrained freehand tie (FT group; n = 105). Radiographic parameters and ultrasound dynamic testing were examined during the preoperative assessment. Preoperative and 2-year postoperative assessments comprised American Orthopaedic Foot and Ankle Society Ankle-Hindfoot Scale, visual analog scale for pain, and 12-Item Short Form Survey (SF-12) scores. Results The 2 groups had no differences in age, sex, or severity distribution in the preoperative assessment. American Orthopaedic Foot and Ankle Society Ankle-Hindfoot Scale, visual analog scale pain, and SF-12 scores were significantly better at the postoperative evaluation (all P < .05) in both groups. No significant difference was noted between groups in outcome scores. In the KP group, however, 7 out of 30 patients (23.3%) developed ankle stiffness with tightness when performing plantarflexion movement. No patients in the FT group reported similar symptoms. Conclusion For mild-to-moderate chronic lateral ankle instability, we propose an arthroscopic Broström procedure with the addition of IER augmentation using a semiconstrained freehand tie to avoid overtightening the IER. This ensures favorable patient satisfaction and clinical outcomes without limitation of plantarflexion of the ankle joint and avoids the possible complication of stiffness with plantarflexion.
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Affiliation(s)
- Tung-Ying Lee
- Department of Orthopedic Surgery, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City, Taiwan
| | - Pei-Yu Chen
- Department of Orthopedic Surgery, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Kai-Chiang Yang
- School of Dental Technology, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan
| | - I-Shiang Tzeng
- Department of Research, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City, Taiwan
| | - Chia Ming Chang
- Department of Orthopedic Surgery, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan
| | - Chen-Chie Wang
- Department of Orthopedic Surgery, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City, Taiwan
- Department of Orthopedics, School of Medicine, Tzu Chi University, Hualien, Taiwan
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Yoshimoto K, Noguchi M, Maruki H, Tominaga A, Okazaki K. Hindfoot Alignment and Ankle Stability Following Arthroscopic Lateral Ankle Ligament Repair. Foot Ankle Int 2023; 44:872-878. [PMID: 37391997 DOI: 10.1177/10711007231181123] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/02/2023]
Abstract
BACKGROUND Hindfoot varus deformity is a known risk factor for chronic lateral ankle instability (CLAI). The impact of this deformity on clinical results following arthroscopic lateral ankle ligament repair (ALLR) for CLAI has not been studied. METHODS Sixty-three ankles from 62 patients who received ALLR for CLAI were retrospectively examined. Preoperative plain radiographs were used to measure tibial articular surface (TAS) angles, and long axial hindfoot alignment radiographs were used to measure tibiocalcaneal angles (TCAs) pre- and postoperatively. Results included ratings on the Self-Administered Foot Evaluation Questionnaire (SAFE-Q) and recurrent ankle instability (respraining of the operated ankle following surgery). RESULTS Recurrent ankle instability, defined as incidence of any new ankle sprain after surgery reported in the follow-up period, occurred in 13 ankles. The TAS angles of these patients were significantly low, and their preoperative TCA was significantly high. Multivariate analysis showed that preoperative TCA was an independent risk factor for recurrent ankle instability. The threshold values for preoperative TCA for recurrent instability were determined via the receiver operating characteristic curve analysis to be 3.4 degrees. Patients were assigned to a low- or high-TCA group based on the reported average TCA (2.7 degrees) of healthy patients. In the high-TCA group, recurrent instability was significantly more frequent, and the scores on the pain subscale of the postoperative SAFE-Q were significantly lower. CONCLUSION Hindfoot varus alignment was associated with pooreroutcomes after ALLR. LEVEL OF EVIDENCE Level III, retrospective comparative study.
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Affiliation(s)
- Kensei Yoshimoto
- Department of Orthopedic Surgery, Tokyo Women's Medical University, Shinjuku-ku, Tokyo, Japan
- Orthopaedic Foot and Ankle Center, Shiseikai Daini Hospital, Setagaya-ku, Tokyo, Japan
| | - Masahiko Noguchi
- Department of Orthopedic Surgery, Tokyo Women's Medical University, Shinjuku-ku, Tokyo, Japan
- Orthopaedic Foot and Ankle Center, Shiseikai Daini Hospital, Setagaya-ku, Tokyo, Japan
| | - Hideyuki Maruki
- Orthopaedic Foot and Ankle Center, Shiseikai Daini Hospital, Setagaya-ku, Tokyo, Japan
- Department of Orthopaedic Surgery, Saitama Medical University Hospital, Moroyama, Saitama, Japan
| | - Ayako Tominaga
- Department of Orthopedic Surgery, Tokyo Women's Medical University, Shinjuku-ku, Tokyo, Japan
- Orthopaedic Foot and Ankle Center, Shiseikai Daini Hospital, Setagaya-ku, Tokyo, Japan
| | - Ken Okazaki
- Department of Orthopedic Surgery, Tokyo Women's Medical University, Shinjuku-ku, Tokyo, Japan
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Yoshimoto K, Noguchi M, Maruki H, Tominaga A, Ishibashi M, Okazaki K. Anterior talofibular ligament remnant quality is important for achieving a stable ankle after arthroscopic lateral ankle ligament repair. Knee Surg Sports Traumatol Arthrosc 2022; 31:2183-2191. [PMID: 36396801 DOI: 10.1007/s00167-022-07211-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 10/24/2022] [Indexed: 11/19/2022]
Abstract
PURPOSE The relationship between ligament remnant quality and postoperative outcomes after arthroscopic lateral ankle ligament repair for chronic lateral ankle instability is controversial. This study aimed to determine whether the signal intensity of the anterior talofibular ligament on preoperative magnetic resonance imaging and ligament remnant quality identified on arthroscopy are associated with recurrent ankle instability after arthroscopic lateral ankle ligament repair. METHODS A total of 68 ankles from 67 patients with chronic lateral ankle instability who underwent arthroscopic lateral ankle ligament repair were retrospectively studied. The signal intensity of the anterior talofibular ligament was evaluated using T2-weighted magnetic resonance imaging. Arthroscopy was used to evaluate the thickness and mechanical resistance of the anterior talofibular ligament by hook palpation and to classify ankles into two groups: the present anterior talofibular ligament group with adequate mechanical resistance and the absent anterior talofibular ligament group with no mechanical resistance. The outcomes included recurrent ankle instability (respraining of the operated ankle after surgery) and Self-Administered Foot Evaluation Questionnaire scores. RESULTS Thirteen ankles were diagnosed with recurrent ankle instability. Patients with a high anterior talofibular ligament T2 signal intensity experienced more recurrent ankle instability than those with a low intensity. As determined via arthroscopy, the absent anterior talofibular ligament group had a higher rate of recurrent ankle instability than the present anterior talofibular ligament group. There were no significant differences in Self-Administered Foot Evaluation Questionnaire scores between patients with high and low anterior talofibular ligament T2 signal intensity, as well as between absent and present anterior talofibular ligament groups based on arthroscopy. CONCLUSION Poor quality of the anterior talofibular ligament remnant could result in recurrent ankle instability after arthroscopic lateral ankle ligament repair. Therefore, when treating chronic lateral ankle instability, surgeons should consider ligament quality. LEVEL OF EVIDENCE IV.
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Affiliation(s)
- Kensei Yoshimoto
- Department of Orthopedic Surgery, Tokyo Women's Medical University, 8-1 Kawadacho, Shinjuku-Ku, Tokyo, 162-0054, Japan.,Orthopaedic Foot and Ankle Center, Shiseikai Daini Hospital, 5-19-1 Kamisoshigaya, Setagaya-Ku, Tokyo, 157-8550, Japan
| | - Masahiko Noguchi
- Department of Orthopedic Surgery, Tokyo Women's Medical University, 8-1 Kawadacho, Shinjuku-Ku, Tokyo, 162-0054, Japan. .,Orthopaedic Foot and Ankle Center, Shiseikai Daini Hospital, 5-19-1 Kamisoshigaya, Setagaya-Ku, Tokyo, 157-8550, Japan. .,Department of Orthopaedic Surgery, Saitama Medical University Hospital, Moroyama, Saitama, Japan.
| | - Hideyuki Maruki
- Orthopaedic Foot and Ankle Center, Shiseikai Daini Hospital, 5-19-1 Kamisoshigaya, Setagaya-Ku, Tokyo, 157-8550, Japan.,Department of Orthopaedic Surgery, Saitama Medical University Hospital, Moroyama, Saitama, Japan
| | - Ayako Tominaga
- Department of Orthopedic Surgery, Tokyo Women's Medical University, 8-1 Kawadacho, Shinjuku-Ku, Tokyo, 162-0054, Japan.,Orthopaedic Foot and Ankle Center, Shiseikai Daini Hospital, 5-19-1 Kamisoshigaya, Setagaya-Ku, Tokyo, 157-8550, Japan
| | - Mina Ishibashi
- Orthopaedic Foot and Ankle Center, Shiseikai Daini Hospital, 5-19-1 Kamisoshigaya, Setagaya-Ku, Tokyo, 157-8550, Japan
| | - Ken Okazaki
- Department of Orthopedic Surgery, Tokyo Women's Medical University, 8-1 Kawadacho, Shinjuku-Ku, Tokyo, 162-0054, Japan
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Teramoto A, Murahashi Y, Takahashi K, Watanabe K, Yamashita T. Effect of Accelerated Rehabilitation on Early Return to Sport After Arthroscopic Ankle Lateral Ligament Repair. Orthop J Sports Med 2022; 10:23259671221121676. [PMID: 36119122 PMCID: PMC9478717 DOI: 10.1177/23259671221121676] [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: 06/16/2022] [Accepted: 07/06/2022] [Indexed: 11/16/2022] Open
Abstract
Background Although the minimal invasiveness of arthroscopic ankle lateral ligament repair (ALLR) means that an early return to sporting activities can be anticipated, studies have described postoperative cast immobilization and the avoidance of weightbearing for a certain period. Accelerated rehabilitation may be helpful for an early return to sport. Purpose To investigate clinical outcomes of ALLR and accelerated rehabilitation with a minimum duration of postoperative ankle immobilization and proactive early weightbearing. Study Design Case series; Level of evidence, 4. Methods This study investigated 23 ankles of 22 patients (11 men, 11 women; mean age, 38.7 years) who underwent ALLR for chronic lateral ankle instability. Postoperative management included the avoidance of weightbearing until postoperative day 3, after which full weightbearing walking with a brace was permitted. The objective was to return to competitive sport 8 weeks after surgery. The following were evaluated: pre- and postoperative instability and pain symptoms, ankle range of motion, anterior drawer distance on stress radiograph, anterior translation measured with a capacitance-type strain sensor, the Ankle-Hindfoot Scale from the Japanese Society for Surgery of the Foot, and the SAFE-Q (Self-Administered Foot Evaluation Questionnaire). Results Two male patients dropped out and were excluded from analysis. Postoperatively, instability and pain resolved or improved in all patients. There was no significant postoperative change in range of motion. There were significant pre- to postoperative improvements in talar tilt angle (from 12.2°-5.6°, P < .01), anterior drawer distance (8.2-4.4 mm, P < .01), and anterior translation (10.5-4.6 mm, P < .01) as well as the Ankle-Hindfoot Scale score (68.8-96.8, P < .01) and all subscales of the SAFE-Q (P ≤ .01 for all). Complete return to sport was achieved by 75% of the patients at 8 weeks postoperatively. Conclusion When accelerated rehabilitation with proactive weightbearing exercises was implemented from postoperative day 3 without ankle immobilization after ALLR, there were significant improvements in objective assessments of ankle stability and clinical scores, and as many as 75% of the patients were able to make a complete return to sport within 8 weeks.
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Affiliation(s)
- Atsushi Teramoto
- Department of Orthopaedic Surgery, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Yasutaka Murahashi
- Department of Orthopaedic Surgery, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Katsunori Takahashi
- Department of Orthopaedic Surgery, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Kota Watanabe
- Department of Physical Therapy, Sapporo Medical University School of Health Sciences, Sapporo, Japan
| | - Toshihiko Yamashita
- Department of Orthopaedic Surgery, Sapporo Medical University School of Medicine, Sapporo, Japan
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Sakakibara Y, Teramoto A, Takagi T, Yamakawa S, Shoji H, Okada Y, Kobayashi T, Kamiya T, Fujimiya M, Fujie H, Watanabe K, Yamashita T. Effects of the Ankle Flexion Angle During Anterior Talofibular Ligament Reconstruction on Ankle Kinematics, Laxity, and In Situ Forces of the Reconstructed Graft. Foot Ankle Int 2022; 43:725-732. [PMID: 35023381 DOI: 10.1177/10711007211069327] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND This study aimed to evaluate the effects of the ankle flexion angle during anterior talofibular ligament (ATFL) reconstruction on ankle kinematics, laxity, and in situ force of a graft. METHODS Twelve cadaveric ankles were evaluated using a 6-degrees of freedom robotic system to apply passive plantar flexion and dorsiflexion motions and multidirectional loads. A repeated measures experiment was designed using the intact ATFL, transected ATFL, and reconstructed ATFL. During ATFL reconstruction (ATFLR), the graft was fixed at a neutral position (ATFLR 0 degrees), 15 degrees of plantar flexion (ATFLR PF15 degrees), and 30 degrees of plantar flexion (ATFLR PF30 degrees) with a constant initial tension of 10 N. The 3-dimensional path and reconstructed graft tension were simultaneously recorded, and the in situ force of the ATFL and reconstructed grafts were calculated using the principle of superposition. RESULTS The in situ forces of the reconstructed grafts in ATFLR 0 degrees and ATFLR PF 15 degrees were significantly higher than those of intact ankles. The ankle kinematics and laxity produced by ATFLR PF 30 degrees were not significantly different from those of intact ankles. The in situ force on the ATFL was 19.0 N at 30 degrees of plantar flexion. In situ forces of 41.0, 33.7, and 21.9 N were observed at 30 degrees of plantar flexion in ATFLR 0, 15, and 30 degrees, respectively. CONCLUSION ATFL reconstruction with the peroneus longus (PL) tendon was performed with the graft at 30 degrees of plantar flexion resulted in ankle kinematics, laxity, and in situ forces similar to those of intact ankles. ATFL reconstructions performed with the graft fixed at 0 and 15 degrees of the plantar flexion resulted in higher in situ forces on the reconstructed graft. CLINICAL RELEVANCE Fixing the ATFL tendon graft at 30 degrees of plantar flexion results in an in situ force closest to that of an intact ankle and avoids the excessive tension on the reconstructed graft.
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Affiliation(s)
- Yuzuru Sakakibara
- Department of Orthopedic Surgery, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, Japan
| | - Atsushi Teramoto
- Department of Orthopedic Surgery, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, Japan
| | - Tetsuya Takagi
- Biomechanics Laboratory, Faculty of System Design, Tokyo Metropolitan University, Hachioji, Tokyo, Japan
| | - Satoshi Yamakawa
- Biomechanics Laboratory, Faculty of System Design, Tokyo Metropolitan University, Hachioji, Tokyo, Japan
| | - Hiroaki Shoji
- Department of Orthopedic Surgery, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, Japan
| | - Yohei Okada
- Department of Orthopedic Surgery, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, Japan
| | - Takuma Kobayashi
- Department of Orthopedic Surgery, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, Japan
| | - Tomoaki Kamiya
- Department of Orthopedic Surgery, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, Japan
| | - Mineko Fujimiya
- Department of Anatomy, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, Japan
| | - Hiromichi Fujie
- Biomechanics Laboratory, Faculty of System Design, Tokyo Metropolitan University, Hachioji, Tokyo, Japan
| | - Kota Watanabe
- Department of Physical Therapy, Sapporo Medical University School of Health Science, Sapporo, Hokkaido, Japan
| | - Toshihiko Yamashita
- Department of Orthopedic Surgery, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, Japan
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