PubMed · 9306445
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A S Greenwald. 1997. Current concepts in joint replacement.. https://doi.org/10.3928/0147-7447-19970901-03
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Ultrasonographically, the femoral component and the tibial plate of total knee prostheses are strongly echogenic, while the high-density polyethylene insert is hypoechoic. This study evaluated the influence of mediolateral and anteroposterior stability after total knee arthroplasty (TKA) on range of motion using real-time monitoring with ultrasound. Mediolateral stress translation, which is increased by horizontal resection of more bone at the ends of the femur or tibia for easy prosthesis implantation, was examined on coronal scans at the level of the collateral ligaments. Anteroposterior drawer was examined on sagittal scans at the level of the patellar tendon. Mediolateral translation (0-10 mm; mean 2.24 mm) did not correlate with range of motion, while anteroposterior drawer (2-10 mm, mean 5.05 mm) correlated well with range of motion. These ultrasonographic findings suggest that horizontal over-resection of the ends of the femur and tibia contributed to joint laxity, which would not result in better ROM. Rollback and sliding of the femoral component on the tibia, which is believed to be correlated with anteroposterior drawer, may be important in achieving better range of motion and obtaining excellent results in TKA.
UNLABELLED: Quality of life scales are being increasingly used to evaluate patients. The earliest scales were standardized questionnaire that did not necessarily provide an optimal evaluation of the quality of life of each individual patient. A number of personalized scales are now available, including the SEIQoL, in which the patients nominate the five quality of life areas most important to them. The SEIQoL has been validated. We tested the SEIQoL in patients treated by total hip arthroplasty, a procedure that is expected to improve quality of life. OBJECTIVE: To compare two methods of administration of the SEIQoL several months after total hip arthroplasty. METHODS: The SEIQoL was administered before and after the arthroplasty. During the postoperative test session, the SEIQoL was administered twice, once using the items nominated preoperatively and once after allowing the patient to repeat the nomination procedure. RESULTS: With both methods, significant improvements in quality of life were demonstrated (P < 0.05). There was no significant difference between the two methods. CONCLUSION: Changing the items of the SEIQoL during prospective studies does not modify the overall quality of life score. Keeping the same items throughout the study is nevertheless warranted.