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Nakayama H, Kanto R, Onishi S, Amai K, Ukon R, Tachibana T, Yoshiya S, Iseki T, Morimoto S, Iseki T. Preoperative Ahlbäck radiographic classification grade significantly influences clinical outcomes of double level osteotomy for osteoarthritic knees with severe varus deformity. J Exp Orthop 2023; 10:5. [PMID: 36695905 PMCID: PMC9877267 DOI: 10.1186/s40634-023-00573-4] [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: 11/03/2022] [Accepted: 01/12/2023] [Indexed: 01/26/2023] Open
Abstract
PURPOSE The purpose of this study was to examine the relationship between preoperative Ahlbäck radiographic classification grade and the clinical outcomes of double level osteotomy (DLO) performed for osteoarthritic knees with severe varus deformity. METHODS The study population comprised a consecutive series of 99 knees (68 patients) for which DLO was performed and follow-up results for a minimum of two years were available. The Ahlbäck radiographic classification system was used to determine the osteoarthritic grade. The following radiological parameters for alignment and bone geometry were measured: mechanical lateral distal femoral angle (mLDFA), mechanical medial proximal tibial angle (mMPTA), joint-line convergence angle (JLCA), and mechanical tibiofemoral angle (mTFA). Clinical results were assessed using the Knee Injury and Osteoarthritis Outcome Score (KOOS) and the International Knee Documentation Committee (IKDC) subjective score preoperatively and at 2 years after surgery. Difference between preoperative and postoperative measurements as well as relationship between Ahlbäck grade and radiological/clinical results were statistically assessed. RESULTS The average age of the study participants was 60.9 ± 6.2 years and the mean follow-up period was 45.4 ± 15.2 months. Each of the radiological parameters exhibited preoperative abnormal values. Knees with Ahlbäck grade 3 and 4 osteoarthritis exhibited significantly greater JLCA and mTFA than grade 1 knees. Two years post-surgery, all radiological parameter values measured within a normal range. Clinical evaluation showed significant improvement in KOOS after surgery. Analysis of the relationship between Ahlbäck grade and clinical score showed that the 2-year postoperative KOOS scores in grade 3 and 4 osteoarthritic knees were significantly lower than grade 1 knees (with the mean 2-year KOOS scores of 350.0 ± 79.9, 317.9 ± 78.3, and 420.2 ± 42.9, respectively). CONCLUSIONS While DLO may produce significant radiological and clinical improvement in knees with joint space obliteration, Ahlbäck grade 3 and 4 osteoarthritic knees associated with larger JLCA and mTFA showed less satisfactory clinical results compared to grade 1 knees. LEVEL OF EVIDENCE IV case series.
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Affiliation(s)
- Hiroshi Nakayama
- grid.272264.70000 0000 9142 153XDepartment of Orthopaedic Surgery, Hyogo Medical University, Mukogawa-Cho, Nishinomiya City, Hyogo, 653-8501 Japan
| | - Ryo Kanto
- grid.272264.70000 0000 9142 153XDepartment of Orthopaedic Surgery, Hyogo Medical University, Mukogawa-Cho, Nishinomiya City, Hyogo, 653-8501 Japan
| | - Shintaro Onishi
- Nishinomiya Kaisei Hospital, Ohama-Cho Nishinomiya City, Hyogo, 662-0957 Japan
| | - Kenta Amai
- grid.510255.60000 0004 0631 9872Osaka Kaisei Hospital, Miyahara Yodogawa Ward, Osaka City, Osaka, 532-0003 Japan
| | - Ryosuke Ukon
- grid.510255.60000 0004 0631 9872Osaka Kaisei Hospital, Miyahara Yodogawa Ward, Osaka City, Osaka, 532-0003 Japan
| | - Toshiya Tachibana
- grid.272264.70000 0000 9142 153XDepartment of Orthopaedic Surgery, Hyogo Medical University, Mukogawa-Cho, Nishinomiya City, Hyogo, 653-8501 Japan
| | - Shinichi Yoshiya
- Nishinomiya Kaisei Hospital, Ohama-Cho Nishinomiya City, Hyogo, 662-0957 Japan
| | - Takuya Iseki
- grid.272264.70000 0000 9142 153XDepartment of Orthopaedic Surgery, Hyogo Medical University, Mukogawa-Cho, Nishinomiya City, Hyogo, 653-8501 Japan
| | - Shota Morimoto
- grid.272264.70000 0000 9142 153XDepartment of Orthopaedic Surgery, Hyogo Medical University, Mukogawa-Cho, Nishinomiya City, Hyogo, 653-8501 Japan
| | - Tomoya Iseki
- grid.272264.70000 0000 9142 153XDepartment of Orthopaedic Surgery, Hyogo Medical University, Mukogawa-Cho, Nishinomiya City, Hyogo, 653-8501 Japan
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Shim SJ, Jeong HW, Kim S, Park YG, Lee YS. Factors Associated With Unfavorable Radiological Outcomes After Opening-Wedge High Tibial Osteotomy for Varus Knees. Orthop J Sports Med 2022; 10:23259671221136501. [PMID: 36452340 PMCID: PMC9703515 DOI: 10.1177/23259671221136501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 08/30/2022] [Indexed: 10/15/2023] Open
Abstract
BACKGROUND Corrective osteotomy around the knee is based on deformity profiles of the femoral and tibial sides. Opening-wedge high tibial osteotomy (OWHTO) can be favored if the outcomes are not different, even if there is a certain degree of abnormal parameters after correction. PURPOSE/HYPOTHESIS The purpose of this study was to identify the factors associated with unfavorable radiological outcomes after OWHTO for varus knees. Our hypothesis was that there would be an optimal situation in which double-level osteotomy (DLO) has advantages over isolated OWHTO and an optimal cutoff value of structural parameters for which DLO should be considered in patients with severe varus knees. STUDY DESIGN Case-control study; Level of evidence, 3. METHODS The radiological and clinical outcomes of 337 patients who underwent OWHTO were retrospectively evaluated. A subgroup analysis was performed according to the weightbearing line ratio (WBLR) (group 1: <25th percentile; group 2: 25th-75th percentile; and group 3: >75th percentile) and factors associated with unfavorable radiological outcomes. For the assessment of cutoff values of the parameters favoring DLO, unfavorable radiological outcomes were categorized as follows: (1) medial proximal tibial angle (MPTA) >95°, (2) joint-line convergence angle (JLCA) >4° (insufficient medial release), (3) JLCA <0° (medial instability), (4) recurrence of a varus deformity, and (5) lateral hinge fracture. RESULTS The mean follow-up period was 66.2 ± 19.1 months. A low preoperative WBLR was related to a larger preoperative to postoperative change (Δ) in the WBLR, a larger reduction in coronal translation, a larger ΔMPTA, a wide preoperative lateral joint space, and a narrow preoperative medial joint space (P < .001, P < .001, P < .001, P = .016, and P = .003, respectively). However, only an MPTA >95° was significantly related to a low WBLR in the subgroup analysis according to unfavorable radiological outcomes (P = .038). The cutoff value of ΔWBLR causing an MPTA >95° was 46.5%, which showed a good area under the curve of 0.800, with a sensitivity of 74.4% and a specificity of 82.7%. The clinical outcomes significantly improved at the final follow-up compared with those preoperatively, with no significant differences between the WBLR groups. CONCLUSION A ΔWBLR ≥46.5% led to an MPTA >95°. However, clinical outcomes were not affected. DLO should be considered if the surgeon desires a postoperative MPTA ≤95°.
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Affiliation(s)
- Seung Jae Shim
- Department of Orthopedic Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Republic of Korea
| | - Ho Won Jeong
- Department of Orthopedic Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Republic of Korea
| | - Saeil Kim
- Department of Orthopedic Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Republic of Korea
| | - Yong-Geun Park
- Department of Orthopedic Surgery, Jeju National University Hospital, Jeju National University College of Medicine, Jeju City, Republic of Korea
| | - Yong Seuk Lee
- Department of Orthopedic Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Republic of Korea
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Nakayama H, Kanto R, Onishi S, Kambara S, Amai K, Yoshiya S, Schröter S, Tachibana T, Iseki T. Hinge fracture in lateral closed-wedge distal femoral osteotomy in knees undergoing double-level osteotomy: assessment of postoperative change in rotational alignment using CT evaluation. Knee Surg Sports Traumatol Arthrosc 2021; 29:3337-3345. [PMID: 32748235 DOI: 10.1007/s00167-020-06197-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 07/27/2020] [Indexed: 01/17/2023]
Abstract
PURPOSE The purpose of this study was to examine the radiological features of hinge fracture occurring at the distal medial femoral cortex in knees undergoing biplanar lateral closed-wedge distal femoral osteotomy (LCW-DFO) in double-level osteotomy (DLO) based on pre- and postoperative CT image analyses. It was hypothesised that medial hinge fractures in LCW-DFO would occur with a similar incidence to that in high tibial osteotomy, and its occurrence would affect the clinical/radiological outcomes and induce unintended change in alignment depending on the fracture type (direction of the fracture). METHODS A consecutive series of 36 knees (31 patients) with primary varus osteoarthritis undergoing DLO comprised the study population. The mean age at surgery was 62.0 ± 5.9 years. Presence of hinge fracture was assessed on radiographs and CT images at 1 week. The fracture type was classified depending on the direction of the fracture line: crack propagation in line with the osteotomy (type 1) and fractures extending proximally (type 2) or distally (type 3) from the tip of the wedge. Computer-assisted assessments of bony limb alignment and bony geometry were conducted on a full-length weight-bearing radiograph and CT images using image analysis software. In addition, subjective clinical results were evaluated using the Knee Injury and Osteoarthritis Outcome Score (KOOS). Radiological and clinical follow-up results at 1 and 2 years were compared to the preoperative data, while comparative analysis was made between the subjects with and without a hinge fracture. RESULTS Postoperative image examinations revealed type 1 and 2 medial femoral hinge fractures in 4 and 7 knees, while no type 3 fracture was identified in the study population. Consequently, the overall incidence of the hinge fracture was 30.6% (11 of the 36 knees). Four of those 11 fractures (36.4%) could not be detected on plain radiographs. CT image analysis for three-dimensional bony geometry showed greater increase in internal rotation of the distal bony segment (increased femoral antetorsion by 9.5° on average) after surgery compared to the knees without a hinge fracture (P = 0.01). Clinical evaluation using the KOOS at 2 years showed no significant difference between the groups with and without hinge fractures. CONCLUSION In LCW-DFO, medial femoral hinge fractures occurred in 30.6% of the cases. Knees with type 1 hinge fracture exhibited significantly greater increase in femoral antetorsion as compared to those without hinge fracture. In this case series, postoperative weight-bearing protocol was delayed for knees with hinge fracture. Consequently, surgical results were not affected by the occurrence of hinge fracture for up to 2 years. LEVEL OF EVIDENCE IV (case series).
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Affiliation(s)
- Hiroshi Nakayama
- Department of Orthopaedic Surgery, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo, Japan.
| | - Ryo Kanto
- Department of Orthopaedic Surgery, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo, Japan
| | - Shintaro Onishi
- Department of Orthopaedic Surgery, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo, Japan
| | - Shunichiro Kambara
- Department of Orthopaedic Surgery, Nishinomiya Kaisei Hospital, 1-4 Ohama-cho, Nishinomiya, Hyogo, Japan
| | - Kenta Amai
- Department of Orthopaedic Surgery, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo, Japan
| | - Shinichi Yoshiya
- Department of Orthopaedic Surgery, Nishinomiya Kaisei Hospital, 1-4 Ohama-cho, Nishinomiya, Hyogo, Japan
| | - Steffen Schröter
- Diakonie Klinikum Jung-Stilling, Wichernstraße 40, 57074, Siegen, Germany
| | - Toshiya Tachibana
- Department of Orthopaedic Surgery, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo, Japan
| | - Tomoya Iseki
- Department of Orthopaedic Surgery, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo, Japan
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Iseki T, Onishi S, Kanto M, Kanto R, Kambara S, Yoshiya S, Tachibana T, Nakayama H. Double-level osteotomy for severe varus osteoarthritic knees can prevent change in leg length and restore physiological joint geometry. Knee 2021; 31:136-143. [PMID: 34144326 DOI: 10.1016/j.knee.2021.04.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 03/01/2021] [Accepted: 04/09/2021] [Indexed: 02/02/2023]
Abstract
BACKGROUND It is unclear whether double-level osteotomy (DLO) combining closed-wedge osteotomy in the distal femur and open-wedge osteotomy in the proximal tibia deformity can prevent change in leg length and excessive coronal inclination of the tibial articular surface in surgical correction of the severe varus knee. The purpose of this study was to examine the postoperative change in leg length as well as radiological and clinical outcomes following DLO compared with the results obtained from knees undergoing isolated open-wedge high tibial osteotomy (OW-HTO). METHODS In cases of severe varus knee deformity (hip-knee-ankle angle (HKA) > 10°) 29 patients undergoing DLO and 35 patients undergoing OW-HTO were included. If the predicted mechanical medial proximal tibial angle (mMPTA) was 95° or greater or the wedge size was 15 mm or greater in the surgical simulation, then DLO was considered as the surgical of option. In cases where these criteria were not met, OW-HTO was selected. All patients were followed up for a minimum of 2 years. RESULTS The changes in the length of the whole leg in the DLO and OW-HTO groups averaged 2.3 ± 4.8 mm and 9.3 ± 7.2 mm, respectively (P < 0.001). mMPTA of more than 95° was found in no knee in the DLO group. CONCLUSIONS This study showed that DLO could avoid leg length change and non-physiologic joint lines when performed in patients with varus HKA > 10°, and the predicted mMPTA was 95° or greater or the wedge size was 15 mm or greater in the surgical simulation.
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Affiliation(s)
- Tomoya Iseki
- Department of Orthopedic Surgery, Hyogo College of Medicine, Hyogo, Japan.
| | - Shintaro Onishi
- Department of Orthopedic Surgery, Hyogo College of Medicine, Hyogo, Japan
| | - Makoto Kanto
- Department of Orthopedic Surgery, Hyogo College of Medicine, Hyogo, Japan
| | - Ryo Kanto
- Department of Orthopedic Surgery, Hyogo College of Medicine, Hyogo, Japan
| | - Shunichiro Kambara
- Department of Orthopedic Surgery, Nishinomiya Kaisei Hospital, Hyogo, Japan
| | - Shinichi Yoshiya
- Department of Orthopedic Surgery, Nishinomiya Kaisei Hospital, Hyogo, Japan
| | - Toshiya Tachibana
- Department of Orthopedic Surgery, Hyogo College of Medicine, Hyogo, Japan
| | - Hiroshi Nakayama
- Department of Orthopedic Surgery, Hyogo College of Medicine, Hyogo, Japan
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Feucht MJ, Winkler PW, Mehl J, Bode G, Forkel P, Imhoff AB, Lutz PM. Isolated high tibial osteotomy is appropriate in less than two-thirds of varus knees if excessive overcorrection of the medial proximal tibial angle should be avoided. Knee Surg Sports Traumatol Arthrosc 2021; 29:3299-3309. [PMID: 32691093 PMCID: PMC8458209 DOI: 10.1007/s00167-020-06166-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Accepted: 07/14/2020] [Indexed: 12/27/2022]
Abstract
PURPOSE To perform a detailed deformity analysis of patients with varus alignment and to define the ideal osteotomy level (tibial vs. femoral vs. double level) to avoid an oblique joint line. METHODS A total of 303 digital full-leg standing radiographs of patients aged 18-60 years and varus alignment [mechanical tibiofemoral varus angle (mFTA) ≥ 3°] were included. All legs were analyzed regarding mFTA, mechanical medial proximal tibia angle (mMPTA), mechanical lateral distal femur angle (mLDFA), and joint line convergence angle. Based on mFTA, varus alignment was categorized as "mild" (3°-5°), "moderate" (6°-8°), or "severe" (≥ 9°). Deformity location was determined according to the malalignment test described by Paley. Two osteotomy simulations were performed with different upper limits for mMPTA: anatomic correction (mMPTA ≤ 90°, mLDFA ≥ 85°) and overcorrection (mMPTA ≤ 95°, mLDFA ≥ 85°). If a single osteotomy exceeded these limits at the intended mFTA of 2° valgus, a double-level osteotomy was simulated. If even a double-level osteotomy resulted in deviations from the defined limits, the leg was categorized as "uncorrectable". RESULTS Mean mFTA was 6° ± 11° of varus (range 3°-15°). A tibial deformity was observed in 28%, a femoral deformity in 23%, a combined tibial and femoral deformity in 4%, and no bony deformity in 45%. The prevalence of a tibial deformity did not differ between varus severity groups, whereas a femoral and bifocal deformity was significantly more prevalent in knees with more distinct varus (p < 0.001). Osteotomy simulation revealed that isolated high tibial osteotomy (HTO) was appropriate in only 12% for anatomic correction, whereas a double-level osteotomy was necessary in 63%. If overcorrection of mMPTA was tolerated, the number of HTOs significantly increased to 57% (p < 0.001), whereas the number of double-level osteotomies significantly decreased to 33% (p < 0.001). Isolated DFO was considered ideal in 8% for both simulations. Significantly more knees were considered "uncorrectable" by simulating anatomic correction (18 vs. 2%; p < 0.001). A double-level osteotomy was significantly more often necessary in knees with "severe" varus (p < 0.001). CONCLUSION Less than one-third of patients (28%) with mechanical varus ≥ 3° have a tibial deformity. If anatomic correction (mMPTA ≤ 90°) is intended, only 12% of patients can be corrected via isolated HTO, whereas 63% of patients require a double-level osteotomy. If slight overcorrection is accepted (mMPTA ≤ 95°), 57% of patients can be corrected via isolated HTO, whereas 33% of patients would still require a double-level osteotomy. LEVEL OF EVIDENCE III, cross-sectional study.
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Affiliation(s)
- Matthias J. Feucht
- grid.6936.a0000000123222966Department for Orthopedic Sports Medicine, Technical University Munich, Ismaninger Str. 22, 81675 Munich, Germany ,grid.5963.9Department of Orthopedics and Trauma Surgery, Medical Center, Faculty of Medicine, Albert-Ludwigs-University of Freiburg, Freiburg, Germany
| | - Philipp W. Winkler
- grid.6936.a0000000123222966Department for Orthopedic Sports Medicine, Technical University Munich, Ismaninger Str. 22, 81675 Munich, Germany
| | - Julian Mehl
- grid.6936.a0000000123222966Department for Orthopedic Sports Medicine, Technical University Munich, Ismaninger Str. 22, 81675 Munich, Germany
| | - Gerrit Bode
- grid.5963.9Department of Orthopedics and Trauma Surgery, Medical Center, Faculty of Medicine, Albert-Ludwigs-University of Freiburg, Freiburg, Germany
| | - Philipp Forkel
- grid.6936.a0000000123222966Department for Orthopedic Sports Medicine, Technical University Munich, Ismaninger Str. 22, 81675 Munich, Germany
| | - Andreas B. Imhoff
- grid.6936.a0000000123222966Department for Orthopedic Sports Medicine, Technical University Munich, Ismaninger Str. 22, 81675 Munich, Germany
| | - Patricia M. Lutz
- grid.6936.a0000000123222966Department for Orthopedic Sports Medicine, Technical University Munich, Ismaninger Str. 22, 81675 Munich, Germany
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Batailler C, Fary C, Denjean S, Gaillard T, Lustig S. High Midterm Survival Rate of Uncemented Total Knee Arthroplasty After High Tibial Osteotomy: A Case-Control Study. J Arthroplasty 2020; 35:1595-1599. [PMID: 32061480 DOI: 10.1016/j.arth.2020.01.054] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Revised: 01/01/2020] [Accepted: 01/20/2020] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND Total knee arthroplasty (TKA) following high tibial osteotomy (HTO) is technically more demanding than TKA in a native knee. Studies have reported increased intraoperative and postoperative complication of TKA with previous HTO. The aim of this study is to compare the survival and complication rates and functional outcomes of uncemented TKA with previous HTO to primary TKA at our institution over a decade. METHODS This case-control study included 41 uncemented TKA after HTO between 2002 and 2012. For each case, 2 control patients were matched based on age and gender without previous HTO. The 2 groups were comparable for body mass index, as well as preoperative functional scores. RESULTS The mean follow-up was 7.8 ± 2.4 (range, 5-13.6) years. At last follow-up, there was no significant difference in functional outcomes or radiological imaging, particularly the rate of radiological loosening. There was no significant difference in complications (9; 22%) in the group of TKA after HTO vs the control group (14; 17%). One revision was performed in the group of TKA after HTO for septic loosening, and no revisions in the control group. The survival rate at a mean follow-up of 8 years was 97.6% in the group TKA after HTO vs 100% in the control group. CONCLUSION Uncemented TKAs following HTO have no significant difference in functional and radiological outcomes and survivorship compared to uncemented primary TKA at midterm follow-up.
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Affiliation(s)
| | - Camdon Fary
- Department of Orthopaedic Surgery, Western Health, Melbourne, Australia; Australian Institute for Musculoskeletal Science (AIMSS), The University of Melbourne and Western Health, St. Albans, VIC, Australia
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Nakayama H, Iseki T, Kanto R, Kambara S, Kanto M, Yoshiya S, Schröter S. Physiologic knee joint alignment and orientation can be restored by the minimally invasive double level osteotomy for osteoarthritic knees with severe varus deformity. Knee Surg Sports Traumatol Arthrosc 2020; 28:742-750. [PMID: 30196434 DOI: 10.1007/s00167-018-5103-3] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 08/13/2018] [Indexed: 01/17/2023]
Abstract
PURPOSE The purpose of this study was to examine early radiological and clinical outcomes following minimally invasive double level osteotomy (DLO) procedure performed for osteoarthritic knees with severe varus deformity. METHODS Twenty consecutive patients who underwent DLO for varus osteoarthritic knees were included in the study. All patients could be tracked for a minimum of 1 year. Periodical radiological and clinical evaluations were performed at 6 and 12 months after surgery. In the radiological assessment, the following parameters were measured on full-length weight-bearing radiographs both pre- and postoperatively: mechanical tibiofemoral angle (mTFA), mechanical lateral distal femoral angle (mLDFA), mechanical medial proximal tibial angle (mMPTA), and joint-line convergence angle (JLCA). In addition, subjective clinical results were evaluated using the Knee Injury and Osteoarthritis Outcome Score (KOOS) and the International Knee Documentation Committee (IKDC) Subjective Score. RESULTS The mean age of the study population was 62.5 ± 6.8 years (range 45-76 years). In the radiological evaluation, the preoperative mTFA, mLDFA, mMPTA, and JLCA values averaged 13.5° ± 3.1° varus, 91.1° ± 1.4°, 82.3° ± 2.0°, and 5.8° ± 2.3°, respectively. At 6 and 12 months, all of the radiological parameters significantly improved and corrected to the values within normal range. In the clinical assessments at the follow-up evaluations, both the KOOS and IKDC subjective scores significantly improved from the preoperative values. No significant changes were noted between the 6 and 12-month results in the radiological and clinical assessments. CONCLUSIONS The minimally invasive DLO technique is a valuable surgical technique accomplishing restoration of physiologic knee joint alignment and orientation with significant improvement in patient-registered clinical outcomes in early postoperative evaluation. Although the follow-up period is still short, the excellent clinical and radiological outcomes shown in the present study support the efficacy of this procedure. LEVEL OF EVIDENCE Retrospective case series, Level IV.
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Affiliation(s)
- Hiroshi Nakayama
- Department of Orthopaedic Surgery, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo, 653-8501, Japan.
| | - Tomoya Iseki
- Department of Orthopaedic Surgery, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo, 653-8501, Japan
| | - Ryo Kanto
- Department of Orthopaedic Surgery, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo, 653-8501, Japan
| | - Shunichiro Kambara
- Department of Orthopaedic Surgery, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo, 653-8501, Japan
| | - Makoto Kanto
- Department of Orthopaedic Surgery, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo, 653-8501, Japan
| | - Shinichi Yoshiya
- Department of Orthopaedic Surgery, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo, 653-8501, Japan
| | - Steffen Schröter
- Department of Traumatology and Reconstructive Surgery, BG Traumacenter Tübingen, University of Tübingen, Tübingen, Germany
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Kubota M, Kim Y, Sato T, Yamaguchi J, Ohno R, Kaneko K, Ishijima M. The actual knee function was not influenced by joint line obliquity after open-wedge high tibial osteotomy. SICOT J 2020; 6:4. [PMID: 32003325 PMCID: PMC6993564 DOI: 10.1051/sicotj/2020001] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 01/12/2020] [Indexed: 01/08/2023] Open
Abstract
Purpose: Excessive joint line obliquity (JLO) after open-wedge high tibial osteotomy (OWHTO) induces detrimental stress on the articular cartilage. The purpose of this article is to assess the correlation between JLO and the clinical results after OWHTO. Methods: 68 patients were followed up for more than 1 year. JLO was assessed using a long-leg standing anteroposterior radiograph. The knee osteoarthritis outcome score (KOOS) and KSS (Knee Society score) objective knee score were assessed as clinical scores. The Weight-bearing line ratio (WBLR), medial proximal tibial angle (MPTA), lateral distal femoral angle (LDFA), and joint line convergence angle (JLCA) were assessed as radiological parameters. The timed up-and-go (TUG) test and single-leg standing (SLS) test were performed, and the isometric muscle strength of the quadriceps and hamstrings was assessed to evaluate the knee function. The primary outcomes were the correlations between the JLO and the clinical score, radiological parameters and knee function after OWHTO. The secondary objective of this study was to detect the factor with the greatest influence on JLO. Results: There were significant correlations between the postoperative JLO and the KOOS in the subcategories of pain, activities of daily living (ADL), and sports and recreation (r = −0.311, −0.302, −0.282, p = 0.011, 0.014, 0.022, respectively). However, the postoperative JLO was not significantly correlated with the KSS, knee function, or muscle strength. The preoperative LDFA and postoperative MPTA were factors influencing increased JLO after OWHTO. Discussion: There was no significant correlation between the JLO and the actual knee function. The preoperative LDFA and postoperative MPTA were factors that influenced the increase in JLO after OWHTO.
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Affiliation(s)
- Mitsuaki Kubota
- Department of Orthopaedic Surgery, Koshigaya Municipal Hospital, 10-47-1, Higashi-Koshigaya, Saitama 3430023, Japan
| | - Youngji Kim
- Department of Orthopaedic Surgery, Koshigaya Municipal Hospital, 10-47-1, Higashi-Koshigaya, Saitama 3430023, Japan
| | - Taisuke Sato
- Department of Orthopaedic Surgery, Koshigaya Municipal Hospital, 10-47-1, Higashi-Koshigaya, Saitama 3430023, Japan
| | - Junichiro Yamaguchi
- Department of Orthopaedic Surgery, Koshigaya Municipal Hospital, 10-47-1, Higashi-Koshigaya, Saitama 3430023, Japan
| | - Ryuichi Ohno
- Department of Orthopaedic Surgery, Koshigaya Municipal Hospital, 10-47-1, Higashi-Koshigaya, Saitama 3430023, Japan
| | - Kazuo Kaneko
- Department of Orthopaedic Surgery and Spoerts Medicine, Juntendo University, School of Medicine, 1-2-1 Hongo, Bunkyo-ku, Tokyo, 1138421, Japan
| | - Muneaki Ishijima
- Department of Orthopaedic Surgery and Spoerts Medicine, Juntendo University, School of Medicine, 1-2-1 Hongo, Bunkyo-ku, Tokyo, 1138421, Japan
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Development of the double level osteotomy in severe varus osteoarthritis showed good outcome by preventing oblique joint line. Arch Orthop Trauma Surg 2019; 139:519-527. [PMID: 30413943 DOI: 10.1007/s00402-018-3068-9] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2018] [Indexed: 02/09/2023]
Abstract
INTRODUCTION The purpose of the study was to describe the development of the surgical technique of double level osteotomy in patients with severe varus malalignment and to investigate the clinical and radiological outcome. It was hypothesized that good clinical results without a higher complication rate can be achieved by double level osteotomy to normalize joint angles and avoid joint line obliquity even in cases of progressed osteoarthritis. MATERIALS AND METHODS Between 2011 and 2014, 33 patients (37 knees) undergoing double level osteotomies (open wedge HTO and closed wedge DFO) were included; of these, 24 patients (28 knees) were available in mean of 18 ± 10 months for the follow-up examination. Indication was symptomatic varus malalignment and medial compartment osteoarthritis. Postoperatively, these patients were assigned to 20 kg partial weight-bearing using two crutches for 6 weeks followed by full weight-bearing. No braces or casts were used. Full weight-bearing long leg anteroposterior radiographs were obtained preoperatively, after 6 weeks and at the time of final follow-up. Mechanical tibiofemoral angle (mTFA), mechanical lateral distal femoral angle (mLDFA) and medial proximal tibia angle (MPTA) were measured. Clinical outcome was evaluated using Lequesne-, Lysholm-, Oxford-, and IKDC-score at the time of follow-up. RESULTS The preoperative mTFA of - 11 ± 3° increased to 0 ± 2° at final follow-up. The difference between mTFA-planning and final follow-up was - 2 ± 3° (p < 0.0006). At final follow-up, MPTA and mLDFA were 89.2 ± 2° and 87 ± 2°, respectively. The Lysholm, Oxford, Lequesne, and IKDC scores were 88 ± 13, 44 ± 3, 2 ± 2, and 77 ± 12, respectively. CONCLUSIONS This study showed that double level osteotomy for the patients with severe varus malalignment and medial compartment osteoarthritis normalises the alignment, joint-angles, avoids joint line obliquity, and leads to good clinical results, despite progressive osteoarthritis. LEVEL OF EVIDENCE Case series, Level IV.
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Primary cementless total knee arthroplasty with or without stem extension: a matched comparative study of ninety eight standard stems versus ninety eight long stems after more than ten years of follow-up. INTERNATIONAL ORTHOPAEDICS 2018; 43:1849-1857. [PMID: 30284003 DOI: 10.1007/s00264-018-4191-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Accepted: 09/26/2018] [Indexed: 10/28/2022]
Abstract
INTRODUCTION Using a cementless fixation for total knee arthroplasty (TKA) is controversial. We hypothesized that cementless tibial base plate with a monoblock long stem (MLS) would provide secure tibial alignment and stable fixation when bone conditions were considered as poor for a cementless fixation. The purpose of this study was to compare the mean eight year survivorship of cementless standard keels (SK) vs cementless MLS. MATERIAL METHODS We report a matched series of 98 cases of SK and 98 cases of MLS in patients with poor bone conditions. The two cohorts were statistically compared. Revision for tibial loosening was used as the endpoint in the survivorship analysis. RESULTS We recorded two cases of tibial loosening and three cases of bipolar loosening in the SK group (0% MLS vs 5% SK). No tibial loosening occurred in the MLS group (statistically significant). No tibial periprosthetic or intra-operative fractures occurred in either group. The survivorship at eight years of follow-up was 95.6% in the SS cohort vs 100% in the MLS cohort using revision for tibial loosening as the endpoint. DISCUSSION This study was not randomized. Its strength was that it took into account the comparative midterm outcomes of a matched cohort of patients implanted with two types of cementless components in the same bone conditions. We did not record any tibial loosening in the MLS group. Using long stems has been criticized but we did not observe any adverse reactions and no intra-operative tibial fracture occurred. CONCLUSION MLS improves the alignment and fixation of cementless TKA. This is a safe solution when bone conditions are poor or modified by previous surgery.
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Nakayama H, Schröter S, Yamamoto C, Iseki T, Kanto R, Kurosaka K, Kambara S, Yoshiya S, Higa M. Large correction in opening wedge high tibial osteotomy with resultant joint-line obliquity induces excessive shear stress on the articular cartilage. Knee Surg Sports Traumatol Arthrosc 2018; 26:1873-1878. [PMID: 28831525 DOI: 10.1007/s00167-017-4680-x] [Citation(s) in RCA: 129] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Accepted: 08/16/2017] [Indexed: 01/15/2023]
Abstract
PURPOSE The purpose of this study was to analyse the resultant stress induced by joint-line obliquity after HTO for varus knee deformity using a three-dimensional (3D) finite element model analysis. METHODS The geometrical bone data used in this study were derived from commercially available human bone digital anatomy media. The 3D knee models were developed using 3D computer-aided design software. The articular surface was overlaid with a 2-mm-thick cartilage layer for both femoral and tibial condyles. Ligament structures were simulated based on properties reported in previous anatomical studies. Regarding the loading condition, isolated axial loads of 1200 N with lateral joint-line inclinations of 2.5°, 5°, 7.5°, and 10° in reference to the horizontal axis were applied to the femur to simulate the mechanical environment in a knee with joint-line obliquity. RESULTS A steep rise of shear stress in the medial compartment was noted in the model with obliquity of 5° or more. This laterally directed shear stress exhibited an incremental increase in accordance with the obliquity angle. The maximum shear stress value in the medial cartilage increased from 1.6 MPa for the normal knee to 3.3, 5.2, and 7.2 MPa in the joint-line obliquity models with 5°, 7.5°, and 10° of obliquity, respectively. CONCLUSIONS The effects of HTO for varus knee deformity on the amount/distribution of stresses in the articular cartilage were analysed using a 3D finite element model. It was shown that joint-line obliquity of more than 5° induced excessive shear stress in the tibial articular cartilage. A large amount of correction in OWHTO with a resultant joint-line obliquity of 5° or more may induce detrimental stress to the articular cartilage. Double-level osteotomy should be considered as a surgical option in this situation.
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Affiliation(s)
- Hiroshi Nakayama
- Department of Orthopaedic Surgery, Hyogo College of Medicine, Nishinomiya, Japan
| | - Steffen Schröter
- BG Trauma Center Tübingen, Schnarrenberg str. 95, Tübingen, Germany
| | - Chie Yamamoto
- Department of Mechanical Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo, 671-2280, Japan
| | - Tomoya Iseki
- Department of Orthopaedic Surgery, Hyogo College of Medicine, Nishinomiya, Japan
| | - Ryo Kanto
- Department of Orthopaedic Surgery, Hyogo College of Medicine, Nishinomiya, Japan
| | - Kenji Kurosaka
- Department of Orthopaedic Surgery, Hyogo College of Medicine, Nishinomiya, Japan
| | - Shunichiro Kambara
- Department of Orthopaedic Surgery, Hyogo College of Medicine, Nishinomiya, Japan
| | - Shinichi Yoshiya
- Department of Orthopaedic Surgery, Hyogo College of Medicine, Nishinomiya, Japan
| | - Masaru Higa
- Department of Mechanical Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo, 671-2280, Japan.
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Song SJ, Bae DK, Kim KI, Lee CH. Conversion Total Knee Arthroplasty after Failed High Tibial Osteotomy. Knee Surg Relat Res 2016; 28:89-98. [PMID: 27274465 PMCID: PMC4895092 DOI: 10.5792/ksrr.2016.28.2.89] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Revised: 11/04/2015] [Accepted: 11/06/2015] [Indexed: 11/25/2022] Open
Abstract
Clinical results of high tibial osteotomy (HTO) deteriorate over time despite the initial satisfactory results. Several knees may require a conversion to total knee arthroplasty (TKA) because of failure such as the progression of degenerative osteoarthritis and the loss of the correction angle. It is important to know the long-term survival rate and common reason of failure in HTO to inform patients of postoperative expectations before surgery and to prevent surgical errors during surgery. In addition, it has been reported that clinical and radiological results, revision rate, and complication rate were poorer than those in patients without a previous HTO. There are few review articles that describe why conversion TKA after HTO is surgically difficult and the results are poor. Surgeons have to avoid the various complications and surgical errors in this specific situation. We would like to present the considering factors and technical difficulties during conversion TKA after HTO with a review of the literature. We could conclude through the review that the correction of deformity, lower amount of tibial bone resection, and sufficient polyethylene insert thickness, restoration of the joint line height, and adequate ligament balancing can be helpful in overcoming the technical challenges encountered during TKA following HTO.
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Affiliation(s)
- Sang Jun Song
- Department of Orthopedic Surgery, Kyung Hee University College of Medicine, Seoul, Korea
| | - Dae Kyung Bae
- Department of Orthopedic Surgery, Kyung Hee University College of Medicine, Seoul, Korea
| | - Kang Il Kim
- Department of Orthopedic Surgery, Kyung Hee University College of Medicine, Seoul, Korea
| | - Chung Hwan Lee
- Department of Orthopedic Surgery, Kyung Hee University College of Medicine, Seoul, Korea
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