Extensor mechanism injuries are unusual and require early operative intervention to optimally restore extensor mechanism continuity, strength, and function. Quadriceps tendon ruptures typically occur in patients older than 40 years and can be associated with degenerative tendon changes, obesity, systemic illnesses, and trauma. Patellar tendon ruptures are usually seen in younger patients as a r...

Abstract Aim The primary aim of this study is to determine whether there a change in patellar height after closure the tendon defect bone-patellar tendon-bone graft harvesting. secondary evaluate clinical and functional outcomes. Method A retrospective observational was conducted. Patients who were diagnosed with ACL injury underwent reconstruction using bone- tendon- bone technique from 2015 2...

We compared the biological characteristics of extrinsic fibroblasts infiltrating the patellar tendon with those of normal, intrinsic fibroblasts in the normal tendon in vitro. Infiltrative fibroblasts were isolated from the patellar tendons of rabbits six weeks after an in situ freeze-thaw treatment which killed the intrinsic fibroblasts. These intrinsic cells were also isolated from the patell...

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...

The present study aimed to determine whether distinct sets of tendon properties are seen in athletes engaged in sports with contrasting requirements for tendon function and structural integrity. Patellar and Achilles tendon morphology and force-deformation relation were measured by combining ultrasonography, electromyography and dynamometry in elite ski jumpers, distance runners, water polo pla...

Nineteen consecutive patients undergoing anterior cruciate ligament reconstruction using the central third of the ipsilateral patellar tendon were included in the study. Serial magnetic resonance images revealed that the donor-site gap in the tendon decreased with time (mean follow-up, 26 months). The thickness was significantly increased compared with the intact contralateral patellar tendon, ...

We report a case of severed sutures of the tibial bone peg during anterior cruciate ligament reconstruction. The graft retracted proximally in the bone tunnel. We describe a simple and aesthetically acceptable method to salvage this rare complication by use of a small arthrotomy through the defect in the remaining patellar tendon.

This article presents a case of a large inferior patellar osteophyte, which developed after patellar tendon autograft anterior cruciate ligament (ACL) reconstruction. This extensive osteophyte formed a neo-articulation with the tibial plateau and contributed to arthrofibrosis, patellar baja, and patellar pain. This is an extremely unusual complication following patellar tendon harvesting for AC...

BACKGROUND Patellar tendinopathy is a common condition affecting the posterior region of the proximal patellar tendon, but the reason for this typical location remains unclear. HYPOTHESIS The posterior region of the proximal patellar tendon is subjected to greater tendinous forces than is the corresponding anterior region. STUDY DESIGN Descriptive laboratory study. METHOD An optic fiber t...

BACKGROUND The aim of this study was to evaluate the patellar height and degenerative changes of the knee by radiographic assessment after patellar tendon reconstruction for chronic anterior cruciate ligament deficiency. METHODS This series included 44 patients (44 knees) with an average age of 31 years and an average follow up of 58 months. The central one third of the patellar bone-tendon-b...