Undercoverage of lateral trochlear resection is correlated with the tibiofemoral alignment parameters in kinematically aligned TKA: a retrospective clinical study
| Autor: | Tiebing Qu, Liang Wen, Xiang Dong, Zhiwei Wang, Desi Ma, Liang Zhang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
musculoskeletal diseases
medicine.medical_specialty lcsh:Diseases of the musculoskeletal system Knee Joint Total knee arthroplasty Osteoarthritis Retrospective data Resection 03 medical and health sciences 0302 clinical medicine Rheumatology Humans Medicine Orthopedics and Sports Medicine Femur Arthroplasty Replacement Knee Retrospective Studies Orthodontics 030222 orthopedics biology business.industry Kinematic alignment 030229 sport sciences Osteoarthritis Knee medicine.disease biology.organism_classification Biomechanical Phenomena Valgus Trochlea Orthopedic surgery Correlation analysis Calipers lcsh:RC925-935 Anatomy business Research Article |
| Zdroj: | BMC Musculoskeletal Disorders BMC Musculoskeletal Disorders, Vol 22, Iss 1, Pp 1-9 (2021) |
| ISSN: | 1471-2474 |
| DOI: | 10.1186/s12891-021-04064-4 |
| Popis: | Background A mismatch between the femoral component and trochlear resection surface is observed in kinematically aligned total knee arthroplasty (KA-TKA) when conventional prostheses are employed. This mismatch is mainly manifested in the undercoverage of the lateral trochlear resection surface. The aim of the present study was to assess the relationship between the mismatch and the alignment parameters of the tibiofemoral joint. Methods Forty-five patients (52 knees) who underwent KA-TKA in our hospital were included. Patient-specific instrumentation was used in 16 patients (16 knees), and conventional instruments with calipers and other special tools were employed in the other 29 patients (36 knees). The widths of the exposed resection bone surface at the middle (MIDexposure) and distal (DISexposure) levels on the lateral trochlea were measured as dependent variables, whereas the hip-knee-ankle angle (HKAA), mechanical lateral distal femoral angle (mLDFA), joint line convergence angle (JLCA), medial proximal tibial angle (MPTA) and transepicondylar axis angle (TEAA) were measured as independent variables. Correlation analysis and subsequent linear regression were conducted among the dependent variables and various alignment parameters of the tibiofemoral joint. Results The incidence of undercoverage of the lateral trochlear resection surface was 86.5 % with MIDexposure and DISexposure values of 2.3 (0–6 mm) and 2.0 (0–5 mm), respectively. The widths of the two levels of exposed bone resection were significantly correlated with mLDFA and HKAA but were not related to TEAA. Conclusions The undercoverage of the trochlear resection surface in KA-TKA is mainly correlated with the degree of valgus of the distal femoral joint line. The current study suggests that this correlation should be considered in the development of KA-specific prostheses. |
| Databáze: | OpenAIRE |
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