Leo A Whiteside

....

..LEVEL OF EVIDENCE: Level III, therapeutic study. See the Guidelines for Authors for a complete description of levels of evidence...

..Gastrocnemius muscle transfer does not sufficiently cover such major defects. This paper describes a new surgical technique that addresses these defects and the results of eight cases of revision TKA managed with this new technique...

..Revision of failed two-stage revision TKA for infection is challenging, and amputation often is the only alternative...

..Loss of the abductor portions of the gluteus medius and gluteus minimus muscles due to THA causes severe limp and often instability...

..The flap group had less pain, lower incidence of limp and Trendelenburg sign, and less need for support than the other two groups, but range of motion decreased...

..Level of Evidence: Therapeutic study, level II (prospective study). See Guidelines for Authors for a complete description of levels of evidence...

..irradiation and storage in argon instead of air reduced the frequency of severe damage such as delamination but not the overall damage rate...

....

..The results suggest that modular polyethylene liners in a porous titanium-coated shell with screw holes can be designed such that clinically significant backside wear is minimal...

..01, respectively). However, the harder ceramic substrate of DLC-Mg-PSZ better resisted plastic deformation, requiring significantly higher loads for cohesive and adhesive coating fracture. These findings supported both of our hypotheses...

..The properties of the yttria-stabilized zirconia evaluated in our study deteriorated in vivo, whereas magnesia-stabilized zirconia did not degrade and appears to be a superior biomaterial for bearing in total joint arthroplasty...

..Most specimens in this group were undamaged (46/72), with others exhibiting only burnishing. Sex, body mass index, and weight did not influence backside damage...

..The bone landmarks technique produced near normal varus and valgus and rotational stability; alignment, patellar groove position, and load transfer characteristics remained near normal throughout flexion...

..While most surgeons use antibiotic-impregnated cement in these revisions, the delivery of the drug in adequate doses is limited in penetration and duration. Direct infusion is an alternate technique...

..Isolated polyethylene component exchange was successful in this small clinical study. Fabricating a locking mechanism with a carbide bit and acrylic cement was effective in laboratory testing and clinical application...

..All but 3 knees (94%) had good clinical function after polyethylene exchange. None of the fabricated locking mechanisms failed...

..Gradual rehabilitation included 2-handed support for 8 weeks and careful gradual abduction exercises beginning 4 weeks postoperatively...

..Those with deeper patellar grooves and supporting lateral flange surfaces have low contact stress similar to that of the normal patellofemoral joint...

..The technique described here uses a cable around the femur and 2 cables over the top of the greater trochanter. The results have been good in 10 of 11 hips. One required reoperation and bone grafting...

..This case discussion features knee arthroplasty cases presented to a panel of surgeons. The cases were chosen to represent common clinical problems encountered in everyday practice...