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At least 721 records · Page 40Linked to original sources
PubMed1982

UCI total knee replacement. A follow-up study.

Using the UCI (University of California at Irvine) total knee prosthesis, an arthroplasty was performed in ninety-seven patients (121 knees) from 1972 through 1977. I examined eighty of these patients (100 knees) at three to eight years after the operation and it was necessary to either perform or recommend further surgery in twenty-five of them (twenty-seven knees). These results were designated as failures. The knees in valgus angulation that failed typically did so within the first year because of medical instability and patellar dislocation. The knees in varus angulation that failed typically did so one to six years after operation because of loosening of the tibial component. When failure became established, each knee was found to have reverted to its preoperative angular deformity, indicating that deforming factors were still operative. I suspect that ligament imbalance may have contributed to many of these failures. The surface area and stiffness of the 5.0 and 7.5-millimeter-thick tibial components of the original UCI prosthesis were not sufficient to prevent loosening and subsidence. Constraint between the tibial and femoral components was not sufficient to prevent subluxation or dislocation if soft-tissue release was needed for correction of deformity. Prompted by this experience, total knee arthroplasty using the UCI device has been discontinued at the Ochsner Medical Institutions.

Evaluation Studies as Topic↗
PubMed1998

Effect of Elmslie-Trillat and Roux-Goldthwait procedures on patellofemoral relationships and symptoms in patients with patellar dislocations.

Seventeen patients (18 knees) with a history of one or more patellar dislocations underwent Elmslie-Trillat (9 knees [group 1]) or Roux-Goldthwait (9 knees [group 2]) patellar realignment surgery. Anterior knee pain was evaluated with a questionnaire, and lateral patellar displacement and tilt were analyzed by magnetic resonance imaging both pre- and postoperatively. Postoperative evaluations were performed after 44 and 50 months (mean) in groups 1 and 2, respectively. The Elmslie-Trillat procedure provided better subjective relief of anterior knee pain and symptoms. One redislocation occurred in each group. Both procedures relieved excessive patellar lateralization, but the effect on patellar tilt was less marked. In patients who underwent the Roux-Goldthwait operation, a less pronounced correction of tilt and lateralization appeared to correlate with more satisfactory subjective results.

Adolescent↗
PubMed2006

[Biomechanical analysis of the normal knee and with cranial cruciate ligament rupture to the cranial translation degree and articular stiffness in dogs].

PURPOSE: To analyse the biomechanical function of the knee joint in dogs, comparing the cranial translation degree and articular stiffness of the tibia in relation to the femur, in normal joints and joints with rupture of cranial crucial ligament. METHODS: Ten mongrel dog knees were analyzed, weighting more than 20 kg. Biomechanical analysis to the cranial translation degree of the knee joint with normal cranial cruciate ligament and surgically sectioned was made. Mechanical assays was realized by Kratos 5002 machine, and recorded in real time the parameters of force (N) and translation/deformation, in mm. The assay had consisted in to use a force(N) registering the cranial translation. RESULTS: To the normal knee, the dislocation media founded after 3 repetitions was 3,39 ; 3,47; 3,53. To the knee with surgical section was 12,96; 13,24; 13,34. The statistical analysis revealed significant difference between groups to the cranial translation and articular stiffness (p<0.05). CONCLUSION: These study allows to conclude that the cranial translation is added in four times and the articular stiffness is reduced one and a half times when statistically compared.

Animals↗
PubMed1991

Active knee joint subluxation: its influence on the prognosis of ligament reconstruction.

Voluntary subluxation of the knee, known as active pivot shift, can be observed in a minority of patients with anterior cruciate ligament deficiency knees. We compared a group of 7 patients exhibiting voluntary subluxation of the knee joint with a group of 61 patients undergoing a similar operative procedure who did not demonstrate this sign. Despite similar age and similar operative procedures, the former group remained handicapped and regained the ability to subluxate the knee. We conclude that patients who exhibit voluntary subluxation of the knee joint are poor candidates for knee-ligament reconstruction.

Adult↗
PubMedDate not supplied

[The measurement of the tibial tuberosity. Patella groove distanced technique and results (author's transl)].

The line between the summit of the tibial tuberosity and the bottom of the trochlea groove as seen on a radiograph taken with the knee in 30 degrees of flexion and neutral rotation is indicative of the valgus position of the quadriceps mechanism at the moment of engatement of the patella in the groove. The authors stress the technical requirements to obtain the radiograph which permits this measurement. Measurement of a group of normal knees and of two groups of knees presenting with known patello-femoral pathology (lateral patello-femoral arthrosis and current dislocation of the patella) are given. In the study of distrubance of the patello-femoral articulation, this measurement provides information of theoretical and therapeutic interest.

Aged↗