Threshold values for stress radiographs in unstable knees after total knee arthroplasty

AbstractPurposeThe primary aim of this study was to investigate the potential benefit of stress radiographs for diagnosis of unstable total knee arthroplasty (TKA) and to identify clinically relevant cut-off values to differentiate between unstable and stable TKAs.MethodsData of 40 patients with 49 cruciate retaining (CR) TKA who underwent stress radiographs as part of the diagnostic algorithm in a painful knee clinic were prospectively collected. Anterior and posterior stress radiographs were done in 90 ° and 15° flexion, varus-valgus stress radiographs in 0° and 30° knee flexion. Knee laxity was measured in mm and degrees by two independent observers using standardized landmarks. Intra- and inter-observer single measure intraclass correlations were between 0.92 to 1 and 0.89 to 1, respectively . For evaluation and investigation of the potential cut-off values, two groups of patients with and without revision surgery due to instability were compared. Radiographic measures of standardizedz values according to the group without revision due to instability were used to calculate average and maximum laxity z-scores.ResultsKnees undergoing revision TKA due to instability showed significantly (p 
Source: Knee Surgery, Sports Traumatology, Arthroscopy - Category: Orthopaedics Source Type: research

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AbstractPurposeTo investigate the femoral component alignment in patients undergoing soft tissue-guided, navigated total knee arthroplasty (TKA). It was hypothesized that with a mechanically aligned tibial component, the soft tissues tensioned and symmetric medial and lateral gaps in flexion/extension, the femoral component would be aligned to the preoperative distal femoral joint line, as measured on knee radiographs.MethodsBetween 2015 and 2017, 77 patients (78 knees) underwent navigated soft tissue-guided TKA at a single centre. Pre and postoperative radiographs were collected and varus knees were taken into account. Th...
Source: Knee Surgery, Sports Traumatology, Arthroscopy - Category: Orthopaedics Source Type: research
Conclusions: This systematic review and meta-analysis of high-quality literature provides relatively strong evidence that APM did not improve functional activity or reduce pain compared with the results with conservative treatment or sham operation in knees with mild or no osteoarthritis.
Source: Clinical Journal of Sport Medicine - Category: Sports Medicine Tags: Original Research Source Type: research
ConclusionExisting literature suggests the DGS disease definition as being a non-discogenic sciatic nerve disorder with entrapment in the deep gluteal space. Also, the general diagnostic pathway for DGS was composed of history taking (posterior hip pain, radicular pain, and difficulty sitting for 30  min), physical examination (tenderness in deep gluteal space, positive seated piriformis test, and positive Pace sign), and imaging tests (pelvic radiographs, pelvic MRI, and spine MRI). This review helps clinicians diagnose DGS with more confidence.Level of evidenceIV.
Source: Knee Surgery, Sports Traumatology, Arthroscopy - Category: Orthopaedics Source Type: research
ConclusionsRadiography could only aid in assessing the component fit in the anteromedial, medial, and lateral regions of the tibia in patients with residual knee pain following knee arthroplasty, but it was not sufficient in comparison with computed tomography in six other regions.Level of evidenceProspective study, level of evidence II.
Source: Knee Surgery, Sports Traumatology, Arthroscopy - Category: Orthopaedics Source Type: research
ConclusionThis study demonstrated that the AUC for the surgical treatment of knee OA can be applied easily in a clinical setting. Most of the treatments provided at our institution were appropriate and in agreement with the AUC recommendations. Additionally, the AUC had a web-based application that was easy to use and simple for identifying treatment recommendations.Level of evidenceRetrospective study, level IV.
Source: Knee Surgery, Sports Traumatology, Arthroscopy - Category: Orthopaedics Source Type: research
ConclusionThe PPTA was significantly smaller in patients with IPFP syndrome or MPP syndrome than in healthy controls. Therefore, sagittal patellar tilt should be included in the routine evaluation of patients with anterior knee pain. Evaluation of PPTA may help to diagnose IPFP syndrome or MPP syndrome.Level of evidenceLevel IV.
Source: Knee Surgery, Sports Traumatology, Arthroscopy - Category: Orthopaedics Source Type: research
hez A, Cuéllar R Abstract PURPOSE: 1 of the causes of groin pain after total hip arthroplasty (THA) is impingement of the iliopsoas tendon. The purpose of this study was to present our results with outside-in arthroscopic tenotomy for iliopsoas impingement after THA. METHODS: We retrospectively reviewed 12 patients treated between 2009 and 2016 with a minimum follow-up of 2 years. Anterior acetabular component prominence was measured on a true lateral hip radiograph. A transcapsular tenotomy was performed near the edge of the acetabular component through an outside-in arthroscopic approach. The ...
Source: Hip International - Category: Orthopaedics Authors: Tags: Hip Int Source Type: research
ConclusionsOsteochondral lesions of the lateral trochlear ridge are rare but important, as these patients go on to arthroscopy at a high rate. If an abnormality of the lateral trochlear ridge is seen or suspected, we recommend CT as the best imaging study to define these lesions.
Source: Skeletal Radiology - Category: Radiology Source Type: research
ConclusionsOnly 20% of the revised UKR were implanted for the recommended indications, using appropriate surgical technique and had a mechanical problem necessitating revision. One-third of primary surgeries were undertaken in patients with early arthritis, which is contraindicated. Two-thirds were presumably revised for unexplained pain, which is not advised as it tends not to help the pain. This study suggests that variable and inappropriate indications for primary and revision surgery are responsible for the high rates of revision seen in registries.Level of evidenceIII, Therapeutic study.
Source: Knee Surgery, Sports Traumatology, Arthroscopy - Category: Orthopaedics Source Type: research
ConclusionPoor preoperative WOMET scores, presence of cartilage lesions at the medial femoral condylus, meniscal degeneration, concomitant anterior cruciate ligament lesions as well as lateral meniscal tears are correlated with worse postoperative outcomes after arthroscopic partial meniscectomy. Patients with femoral bone marrow lesions femoral are more likely to gain benefit from arthroscopic partial meniscectomy in the middle term. Despite justified recent restrictions in indication, arthroscopic partial meniscectomy seems to effectively reduce pain and alleviate symptoms in carefully selected patients with degenerative...
Source: Knee Surgery, Sports Traumatology, Arthroscopy - Category: Orthopaedics Source Type: research
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