Correspondence to: Dr Parfitt. A 9 year old boy presented to the accident and emergency department with a painful, tender swollen right knee. He had fallen 4 feet from a wall and struck his knee on the edge of a kerb. On examination the knee was held in a 45 degrees of fixed flexion. A 10 cm horizontal laceration extending to deep fascia was evident. Radiography (see fig 1) revealed the patella...

Evaluation of patellar tracking has been suggested as an increasingly relevant diagnostic tool in patients with patellofemoral disorders. This study aimed to assess the accuracy of measuring in vivo patellar tracking with the use of a custom-made clamp. Nine healthy female college students participated. Sagittal-view fluoroscopy was used to track the movement of the clamp and the underlying pat...

Permanent dislocation of the patella in adults is a rare condition that presents with complete irreducible lateral dislocation of the patella, combined with secondary changes, such as valgus deformity and leg-length discrepancy. Because these secondary changes cannot heal spontaneously after skeletal maturation if left untreated, the patients frequently possess pathology not limited to the knee...

Traumatic dislocation of the patella is classified as lateral, medial, or intra-articular according to the direction of dislocation. Lateral dislocation is the most common type of patellar dislocation, and intra-articular dislocation is rare. Intra-articular dislocation is classified as superior, inferior, or vertical dislocation. Inferior dislocation is categorized as Type I, which occurs in y...

BACKGROUND The management of severe patellofemoral arthritis in young patients remains a significant problem. For many, patellofemoral replacement is not a desirable option. Current surgical techniques for patellectomy disrupt the extensor lever arm causing weakness. We describe a new technique that maintains the extensor mechanism tension and a case series showing good results for patella-only...

PURPOSE To assess the Insall-Salvati ratio in normal Indian adults to determine its applicability and the incidence of patella alta and baja in Indian populations. METHODS 800 knees in 200 men and 200 women aged 18 to 50 (mean, 30) years were evaluated using lateral radiographs. The knee was set in semi-flexion (30º) to enable good visualisation of the patellar tendon and its insertion into t...

BACKGROUND The various measurements of patellar tilting failed to isolate patellar tilting from the confounding effect of its neighboring bone rotation (femoral and tibial rotation) in people sustaining patellofemoral pain (PFPS). Abnormal motions of the tibia and the femur are believed to have an effect on patellofemoral mechanics and therefore PFPS. The current work is to explore the various ...

The patellofemoral joint, the anterior compartment of knee, undergoes earliest degenerative changes throughout life and joint morphology is great importance in appearance pain knee chondromalacia patella. Chondromalacia patella a progressive disease with change normal structure, formation minor or major defects cartilage itself represents significant socioeconomic problem because it occurs youn...

Dear Sir, I would like to report an interesting case of a two-year old, female, spayed Bengal cat with a lesion similar to osteochondritis dissecans (OCD) of the medial femoral condyle with concurrent distal femoral varus, medial patella luxation and hip dysplasia. The cat was presented with an intermittent, mild left hindlimb lameness, which the owner reported to be associated with an audible ...

Fractures of the patella in children and adolescents are rare injuries with particular characteristics. The aim of this study was an analysis of epidemiology, treatment strategy and outcome of this injury. Between 1992 and 2006 all fractures of the patella in patients with an age 5 16 years were included in a case control study. Besides outcome analysis using the modified HSS knee score, radiol...