Kinematically Aligned TKA Aligns the Ankle Joint Line Closer to Those of the Native Ankle than Mechanically Aligned TKA in Bipedal Stance

In this study, we examined results from KATKA and MATKA to determine which surgery restores the ankle joint orientation closer to the native ankle joint in bipedal stance and hypothesized that KATKA, rather than MATKA, would be more effective. Data from long-leg standing radiographs of 60 healthy adults (control group, n = 120 knees), patients who underwent MATKA (n = 90 knees), and patients who underwent KATKA (n = 90 knees) were retrospectively reviewed. The hip–knee–ankle angle, orientation of the tibial plafond and the talar dome relative to the ground (G-plafond and G-talus, respectively), and orientation of the plafond relative to the mechanical axis of the limb (M-plafond and M-talus, respectively) were measured and analyzed for comparison. Results show that bipedal stance alignment in patients who underwent KATKA (G-plafond: −0.65 ± 3.03 and G-talus: −1.72 ± 4.02) were not significantly different to native ankle joint alignment indicated by the control group. Compared with the native ankle joint measured in the control group (G-plafond: −0.76 ± 2.69 and G-talus: −1.30 ± 3.25), the tibial plafond and talar dome significantly tilted laterally relative to the ground in ankle joints after MATKA (G-plafond: −2.32 ± 3.30 and G-talus: −2.97 ± 3.98, p =&thi...
Source: Journal of Knee Surgery - Category: Orthopaedics Authors: Tags: Original Article Source Type: research

Related Links:

Abstract PURPOSE: Tibial bowing in valgus knees with arthritis can lead to component malplacement during total knee arthroplasty (TKA). Incidence of valgus knees with medial tibial bowing, its effect on tibial component placement during primary TKA and methods to improve accuracy of the component placement were studied. METHODS: Full-length weight-bearing alignment radiograph was taken in 117 patients (149 knees) with valgus deformity undergoing TKA. In these cases, the proximal tibial reference for extramedullary jig placement was planned preoperatively with reference to the tibial spines and classified as f...
Source: Journal of Orthopaedic Surgery - Category: Orthopaedics Authors: Tags: J Orthop Surg (Hong Kong) Source Type: research
Abstract Ameloblastoma in the tibia is rare. Limb reconstruction after tumor resection is challenging in terms of selection of the operative method. Here, we report a case of radical resection of an ameloblastoma in the mid-distal tibia combined with limb salvage using a three-dimensional (3D)-printed prosthesis replacement, with 1-year follow-up results. After receiving local institutional review board approval, a titanium alloy prosthesis was designed using a computer and manufactured with 3D-printing technology. During the operation, the stem of the prosthesis was inserted closely into the proximal tibial medul...
Source: Yonsei Medical Journal - Category: Universities & Medical Training Authors: Tags: Yonsei Med J Source Type: research
ConclusionsThe study demonstrated comparable postoperative functional outcome and quality of life. However, rate of postoperative revision surgery was substantially higher in ankle debridement alone group.Level of evidenceRandomized controlled study, Level I.
Source: Knee Surgery, Sports Traumatology, Arthroscopy - Category: Orthopaedics Source Type: research
This study was designed to evaluate the effectiveness of showing patients the change in their standing posture, before and after total knee replacement, using standing photographs (anterior, posterior, and lateral view), on improving self-reported quality of life and satisfaction. Full-length lower extremity radiographs and standing photographs were obtained prior to total knee replacement and 6 months after surgery in the study group. In the control group, radiographs and photographs were not obtained. The hip–knee–ankle angle and mechanical axis deviation were compared between the two limbs and two groups. Th...
Source: Journal of Knee Surgery - Category: Orthopaedics Authors: Tags: Original Article Source Type: research
Conclusions: Ochronosis is a very rare disease in Asia. This paper supplies new information for study of this disease. The mechanism is still unknown right now. Further studies will be necessary.
Source: Medicine - Category: Internal Medicine Tags: Research Article: Clinical Case Report Source Type: research
AbstractPurposeOsteoarthritis of knees with varus deformity is associated with a compensatory valgus deformity of the hindfoot and a lateral loading foot pressure pattern. However, whether this abnormal loading pattern is corrected in total knee arthroplasty (TKA) is unclear.MethodsThe alignment and loading pattern of 91 consecutive patients (121 knees) undergoing TKA with pre-operative varus more than 10 ° were evaluated prospectively with functional outcome scores, static conventional radiography and dynamic pedobarogaphy pre-operatively and 1-year post-operatively. Outcomes assessed were Oxford Knee Scores, American...
Source: Knee Surgery, Sports Traumatology, Arthroscopy - Category: Orthopaedics Source Type: research
In this study, we aimed to determine whether (1) greater degrees of preoperative varus deformity increase the incidence of varus-aligned TKAs and (2) residual varus alignment improves the long-term survival rate in TKAs with preoperative varus deformity.MethodsWe retrospectively reviewed 905 primary TKAs for varus-type osteoarthritis from November 1998 to June 2009. The mean follow-up was 8.23 years (± 3.47 years). We measured pre- and postoperative mechanical hip-knee-ankle axis angle (HKA) on full-length standing radiographs to assess the severity of preoperative varus deformities, defined as mild (0° 
Source: Orthopaedics and Traumatology: Surgery and Research - Category: Orthopaedics Source Type: research
This study aimed to determine whether individualized intentional varus distal femoral cutting yielded satisfactory clinical and radiological outcomes.MethodsA total of 77 patients (91 knees) with varus knee (hip –knee–ankle axis ≥ 10°) and lateral femoral bowing>  5° underwent navigation-assisted primary TKA using individualized intentional varus distal femoral cutting. Knee Society scores, Western Ontario and McMaster Universities scores, and radiographs for limb alignment, implant alignment, and aseptic loosening were evaluated. Subgroup analyses were p erformed according to the li...
Source: Knee Surgery, Sports Traumatology, Arthroscopy - Category: Orthopaedics Source Type: research
The objective of this study was to assess outcomes in 26 patients managed with 1S-TKA-TO.Hypothesis1S-TKA-TO produces satisfactory clinical and anatomical outcomes and is not associated with higher morbidity rates compared to TKA alone or two-stage TKA-TO.Material and methodsA prospective study was conducted in 25 patients (26 knees) managed with 1S-TKA-TO between 1995 and 2014. There were 16 males and 9 females with a mean age of 64 years (range, 29–80 years) and a mean body mass index of 29.6 (range, 24–49). The EKD was constitutional in 14 knees, post-traumatic in 5 knees, and induced by TO in 7 knees. None ...
Source: Orthopaedics and Traumatology: Surgery and Research - Category: Orthopaedics Source Type: research
The objective of this study was to assess clinical and radiological outcomes and morbidity (complications and revisions) in 6 patients managed with S1-TKA-FO.Hypothesis1S-TKA-FO produces satisfactory outcomes and is not associated with higher morbidity rates compared to two-stage TKA-TO or TKA with intra-articular EKD correction, while also significantly shortening total treatment duration.Material and methodsA prospective study was performed in 6 patients managed with 1S-TKA-FO between 1999 and 2011; mean age was 64 years (range, 59–72 years) and mean body mass index was 29.5 (range, 26–35). The EKD was consis...
Source: Orthopaedics and Traumatology: Surgery and Research - Category: Orthopaedics Source Type: research
More News: Ankle Replacement | Orthopaedics | Radiography | Study