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At least 1,387 records · Page 77Linked to original sources
PubMed1985

Nontraumatic superior dislocation of the patella.

A case of superior patellar dislocation is described. The dislocation was sustained without apparent trauma. Closed reduction was accomplished in the emergency department. No apparent injury to the patellar ligament was sustained.

Humans↗
PubMed1990

Chondral lesions of the patella evaluated with computed tomography, magnetic resonance imaging, and arthroscopy.

In a small series of cadaver knees, experimentally created lesions of the patellar cartilage were compared using contrast computed tomography (CT) and magnetic resonance (MR) imaging. Contrast CT was able to recognize only 50% of the lesions smaller than 3-mm diameter at the first attempt, and none of the lesions of 0.8 mm. MR imaging detected all the lesions, even those as small as 0.8 mm, without use of contrast material. Simultaneously, a prospective clinical study comparing MR diagnoses of chondral lesions with arthroscopic findings was initiated in a series of 54 knees. This clinical study revealed that, concerning patellar chondral lesions, the accuracy of MR imaging compared with arthroscopy (the gold standard) was 81.5%. The sensitivity was 100%, but the specificity only 50% due to the false positives. Reexamination of the MR records enabled us to refine the MR diagnosis and to propose a staging of the chondral lesions. The high rate of false-positive results in our series can be explained by the hypothesis that MR imaging can possibly detect very early lesions, which appear as abnormalities in the deep cartilage layers.

Adult↗
PubMed1992

Management of recurrent dislocation of the patella following total knee arthroplasty.

Fifteen knees with patellar dislocation after total knee arthroplasty had realignment of the extensor mechanism using a modification of the Trillat procedure. The onset of dislocation occurred on average 4.7 months from the time of surgery. After total knee arthroplasty the patients had an average range of motion of 109 degrees. All patients had medialization of the tibial tubercle and lateral release. No patient had a recurrent dislocation after a minimum 2-year follow-up period. The average knee score was 82 and the average flexion arc was 112 degrees. All but one of the osteotomies healed uneventfully.

Aged↗
PubMed2005

Secondary resurfacing of the patella in mobile-bearing total knee arthroplasty.

OBJECTIVE: We aim to evaluate the impact of secondary patellar resurfacing in patients with patellar-related anterior knee pain who have undergone a mobile-bearing primary knee arthroplasty without resurfacing. MATERIALS: A total of 2950 primary Low Contact Stress (DePuy, Warsaw, Ind) mobile-bearing knee arthroplasties without patellar resurfacing were carried out between March 1992 and March 2003. Thirteen patients (0.4%) underwent secondary patellar resurfacing for patellar-related anterior knee pain. The mean age of the patients was 67.8 years. There was a mean time of 28 months to the secondary resurfacing procedure. RESULTS: Only 4 patients had an unequivocal improvement in their symptoms at a mean follow-up of 45 months (range, 3-92 months). No morbidity was noted from the procedure. CONCLUSION: The success rate of secondary patellar resurfacing is poor and patients should be counseled carefully.

Adult↗
PubMed2005

Anterior cruciate ligament reconstruction, hamstring versus bone-patella tendon-bone grafts: a systematic literature review of outcome from surgery.

The Anterior Cruciate Ligament (ACL) is regarded as critical to the normal functioning of the knee, its disruption causing functional impairment. In recent years central third of the patellar tendon (PT) and combined Semitendinosis and gracilis tendons (HT) have become the most frequently used graft types for anterior cruciate knee ligament reconstruction. For the past two decades, the gold standard in ACL reconstructions has been the PT, but increasingly the HT graft has been used. This shift in popularity has occurred for several reasons, including concerns about damaging the knee extensor apparatus using the PT procedure, but potential complications also exist with HT techniques. Despite the vast amount of literature on ACL reconstruction and its outcome, there are very few controlled randomised studies directly comparing the two most commonly used tissue grafts. This review aimed to examine the data available from randomised trials, in order to combine and evaluate the best available evidence for choice between these two popular tissue grafts for use in ACL reconstruction. A literature search revealed 13 studies, which met the inclusion criteria of the review. The results of the 13 studies included in this review suggest that there is no significant evidence to indicate that one graft is superior. Both the PT and HT grafts appear to improve patients' performance, and therefore both would be good choices for ACL reconstruction.

Anterior Cruciate Ligament↗