Journal of the Southern Orthopaedic Association最新文献

Management of distal-third femoral fractures is challenging, especially in the elderly population, where the associated complication rate has been reported to be as high as 40%. This study reviews the techniques and safety of intramedullary stabilization for displaced and unstable fractures involving the distal third of the femur in patients who were at least 80 years old, with the use of Ender nails. A retrospective study of 12 patients with 14 femur fractures underwent closed fixation of their fracture(s) with Ender nails performed within 24 hours of the injury. There were 10 females and 2 males, whose average age was 88 years (range, 82-103 years). The average length of follow-up was 3 years. Twelve fractures (86%) healed uneventfully. There were two nonunions (14%) with no other major or minor complications. No patients were lost to follow-up evaluation. All patients eventually returned to their preinjury level of function. This technique is particularly applicable to elderly patients with severe osteopenia and preexisting medical problems, as it minimizes blood loss and other associated complications, while providing stability for immediate mobilization.

Osteoid osteoma is infrequently localized to the hand. Initially the lesion may cause nonspecific symptoms. A 14-year-old boy presented with spontaneous onset swelling and pain wrist for 2 months. Initially he was suspected of having tuberculosis, but radiographs revealed a sclerotic lesion of the scaphoid and the sedimentation rate was not high. CT scan of the wrist showed a double-ring sign, indicating osteoid osteoma. Lesion was curetted and the nidus excised. This resulted in rapid resolution of the symptoms.

A 14-year-old female with a 1-year history of a painful clavicle mass underwent resection and reconstruction with an intercalated autograft and rigid plate fixation. The histopathology was diagnostic for osteoblastoma. Although a clavicle mass is a common entity following clavicle trauma, less common disorders such as bone tumors need to be considered in the differential diagnosis. Osteoblastoma is an uncommon, benign bone tumor representing 1% of all primary bone tumors. An extensive review of the literature reveals only one reported case of clavicular osteoblastoma.

The identification of factors that may affect the eventual survivorship of primary total hip arthroplasty is essential. The surgeon needs this information to assist in the patient selection process and to mold patient expectations. Patients may then be counseled regarding factors within their control, and this information may affect long-term behavior. For a given patient, how might the surgeon best advise that person to prolong the longevity and functionality of his or her hip replacement?

The purpose of this study was to review knee kinematics following combined hamstring lengthening and rectus femoris transfer. Previous findings reported in the literature include kinematic changes in the magnitude of stance-phase maximum knee flexion, stance-phase minimum knee flexion (extension), and swing-phase maximum knee flexion; the timing of swing-phase maximum knee flexion and swing-phase minimum knee flexion (extension); and total knee excursion. Twenty-three children underwent bilateral (22) or unilateral (1) hamstring lengthening and rectus femoris transfer (45 knees) at the Shriners Hospitals for Children in Lexington, KY between January 1996 and December 2001. Sagittal knee kinematic data were obtained as part of a complete gait study accomplished before surgery and at 1 year after surgery. Values were compared using a paired t test method set at a p < .05 level to determine statistical significance. Changes were seen in the magnitude of stance-phase maximum knee flexion, stance-phase minimum knee flexion (extension), swing-phase maximum knee flexion, and swing-phase minimum knee flexion (extension); in the timing of swing-phase maximum knee flexion; and in total knee excursion.

Total hip arthroplasty can be performed successfully using cement or cementless technology. Cemented femoral stems can achieve enduring long-term suvivorship as long as meticulous surgical technique is utilized and patient selection is appropriate. Cemented acetabular components should only be utilized in patients with less than 10 years of remaining life expectancy. Critical risk factors for cemented total hip arthroplasty include atrophic osteoarthrtis on the acetabular side and unfavorable femoral geometry for the femoral stem such as "the stove-pipe" canal. Rapid polyethylene wear and osteolysis are rarely seen in contemporary cemented total hip arthroplasty performed with a smooth, tapered, collarless femoral stem with a highly polished head and a well-designed acetabular component.

Delay or failure of healing in long bone fracture is a common clinical problem confronting the orthopaedic surgeon, and can have significant impact on the quality of life for patients who have it. One treatment option for this problem is the use of electrical or ultrasonic bone stimulation. Electrical signals can be delivered with an implantable direct current stimulator, or noninvasively using inductive or capacitive coupling to induce currents in the tissues. Low-intensity ultrasound can speed the healing of fresh fractures. Although regarded with skepticism by many physicians, there is abundant evidence from clinical studies of the effectiveness of these treatments. In addition to dozens of retrospective reports, randomized, prospective, double-blind controlled trials have shown the efficacy of electrical stimulation for nonunion and ultrasound for speeding healing. Patients with unacceptable deformity, synovial pseudarthrosis, or large gaps are generally not good candidates for this treatment modality. This article is a review of the clinical literature regarding treatment of long bone nonunion with bone stimulators.

From 1996 to 2000, 20 patients with a mean age of 53 underwent 20 arthrodeses with Herbert screws. There were 16 (80%) distal interphalangeal joint (DIP) and 4 (20%) thumb interphalangeal (IP) joint arthrodeses. Average follow-up was 25 months (range, 6-39 months). The diagnoses included rheumatoid arthritis in 10 patients, degenerative arthritis in 4, and post-traumatic arthritis in 6. Arthrodesis relieved pain and restored stability in all patients. Solid osseous union occurred in 19 patients (95%). The average interval to fusion was 8 weeks for DIP and 12 weeks for IP joint arthrodesis. Solid osseous union occurred in 19 patients (95%). The average interval to fusion was 8 weeks for distal interphalangeal joint arthrodesis and 12 weeks for interphalangeal joint of the thumb. There were three complications: one delayed union, one nonunion because of a short screw, and one dorsal skin necrosis with amputation. It was shown that distal interphalangeal joint arthrodesis with a Herbert screw is a technique with several advantages: good clinical results, high rates of fusion, early mobilization, and the screw does not need to be removed after the fusion heals. Potential complications may be avoided by using the Herbert mini-screw.