![]() Inclusion criteria comprised of: (1) patients with primary unilateral TKA due to end-stage varus knee OA (knee Kellgren-Lawrence (K-L) radiographic classification of grade III or IV). Consequently, the purpose of this study was to evaluate the post-MA-TKA alterations in ankle alignment after knee varus deformity correction.Ī retrospective analysis was conducted for patients who underwent TKA surgery in our hospital from February 2021 to February 2022. To the authors’ awareness, the ankle alignment alterations following MA-TKA is obscure, and there is no specific research on MA-TKA-induced modifications in ankle joint alignment. Numerous studies have indicated that compared to CM-TKA, RA-TKA can enhance accuracy, improve prosthesis position and limb force lines, and achieve superior imaging and functional results. Robot-assisted total knee arthroplasty (RA-TKA), such as the Mako surgery robot (Stryker, USA), is gaining widespread utilization owing to advancements in TKA technology. revealed that A correction of ≥ 10 °in a genu valgum deformity can affect ankle joint alignment, leading to alterations in TPI and TI. reported that in patients whose knee varus deformity was corrected ≥ 10 ° following TKA, the degree of ankle varus incongruence was aggravated. However, the majority of ankle OA cases manifest ankle varus rather than valgus. Previous studies have demonstrated that ankle valgus incongruence aggravated following TKA. Correction of varus or valgus knee deformities may occasion ankle malalignment and increase the varus inclination of the ankle. The rising prevalence of ankle pain is garnering increased attention on post-TKA ankle malalignment. Studies have shown that 24–35% of patients who undergo TKA develop concomitant ankle OA. Nonetheless, the change of mechanical axis can impact other joints of the lower extremities, thereby causing postoperative ankle pain. TKA effectively alleviates knee pain, improves range of motion, and permits recovery of the lower limb line of force by correcting knee varus or valgus. As TKA’s degree of specialization improves, the survival rate of prostheses and patient satisfaction with TKA are increasing. Total knee arthroplasty (TKA) is among the prevailing therapeutic options for end-stage OA, and the role of preparatory planning is critical for proper surgery. This may occasion the pathogenesis of ankle pain following TKA.Įnd-stage knee osteoarthritis (OA) is frequently accompanied by varus or valgus deformity. When the varus correction ≥ 10°, ankle varus incongruence aggravated, while when the varus correction ≥ 7.55°, the probability of ankle varus incongruence increased 4.86-fold. ConclusionĬompared with CM-TKA, MA-TKA osteotomy showed more precision but was unable to reduce post-operation ankle varus incongruence. When the varus correction was ≥ 7.55°, the probability of ankle varus incongruence exacerbation increased 4.86-fold. Only for varus corrections ≥ 10° did TTTA change significantly (p < 0.01) and ankle varus incongruence aggravate post-operation. Knee varus deformity was properly corrected and the mechanical axis was restored in all patients, regardless of the treatment group. The number of mTFA, mLDFA, and MPTA outliers in the MA-TKA group was significantly lower compared to the CM-TKA group (P<0.05). TTTA is a quantitative representation of the extent of ankle incongruence. Seven radiological measurements were evaluated pre and post-surgery: mechanical tibiofemoral angle (mTFA), mechanical lateral distal femoral angle (mLDFA), medial proximal tibial angle (MPTA), lateral distal tibial angle (LDTA), tibial plafond inclination angle (TPIA), talar inclination angle (TIA), and tibiotalar tilt angle (TTTA). The patients were divided into four subgroups according to the degree of surgical correction of the knee varus deformity. ![]() Patients were divided into two groups based on MAKO robot involvement during the procedure: the MA-TKA group (n = 36) and the conventional manual total knee arthroplasty (CM-TKA) group (n = 72). MethodsĪ retrospective analysis was conducted for 108 patients with TKA from February 2021 to February 2022. The objective of this study was to investigate the ankle alignment alterations after the correction of knee varus deformity in MAKO robot-assisted total knee arthroplasty (MA-TKA).
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