INTRODUCTION Locked vertical patellar dislocations are rare and pose a therapeutic challenge. This case is more unusual, as the patient was a known case of recurrent patellar dislocation and presented with an atraumatic locked and vertically rotated patellar dislocation. This type of presentation has never been reported in literature to the best of our knowledge. CASE PRESENTATION A 14-year-o...

In recent years, the medial patellofemoral ligament (MPFL) has been considered as the primary restraint of the medial patellar stabilizers [1]. Clinical reports have revealed that MPFL injury occurs in almost all patients with traumatic patellar dislocation, and attention has been focused on the repair and reconstruction of the MPFL in recurrent patellar dislocation and patellar subluxation [2]...

no tillage systems can reduce operating costs, enhance soil organic matter, ameliorate soil structure and prevent environmental damage caused by stubble burning. however, the lack of an appropriate direct drill for the hardened soil of arid areas reduces adequate soil-seed contact and, thus, the system has shown contradictory results in past tests. developing a direct drill to place the seed an...

Objectives: Patellofemoral dislocation, the most severe presentation on spectrum of patellar instability, is common in adolescent populations. Trochlear dysplasia an integral component disorder, and procedures aimed at correcting instability by addressing this are often necessary. A theoretical risk injury to distal femoral physis exists these surgeries. At our institution, a thick-flap sulcus ...

Patellar tendon rupture is a catastrophic complication following total knee arthroplasty (TKA). Though revision TKA has been suspected of being a predisposing factor for the occurrence of patellar tendon rupture, there are few reports on patellar tendon rupture after revision TKA. Here, we present a case of acute patellar tendon rupture that occurred after TKA revision. In the patient, the pate...

Abstract Background The radiological indicators can help doctors determine whether to make tibial tubercle transfer. But which indicator is better still in question. Methods 117 knees 103 patients who had undergone patellar surgery and 60 58 no history of dislocation from 2014 2019 were analyzed. Significant differences tubercle–trochlear groove (TT-TG) on CT tubercle–posterior cruciate ligamen...

PURPOSE Risk factors associated with a clinical presentation of patellar tendinopathy are patellar tendon ultrasonographic abnormality (PTA) and excessive loading. It remains unknown whether characteristics of an athlete's landing technique contribute to this excessive patellar tendon loading. This study investigated whether asymptomatic athletes with and without PTA had different landing strat...

A low-contact stress, high-congruity, mobile-bearing patellofemoral joint arthroplasty decreases the contact force in the patellofemoral joint, theoretically reducing patellar polyethylene wear and increasing implant longevity. This article describes the case of a 47-year-old obese woman who presented with pain and loss of extension after a low-contact stress, high-congruity, mobile-bearing pat...