Clinical efficacy on the reconstruction of bone defects using modular hemipelvic prosthesis in patients with pelvic tumors.
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OBJECTIVE: To evaluate the clinical efficacy of modular hemipelvic prosthesis replacement in the treatment of pelvic tumors and the relationship between postoperative functional recovery and the position deviation of the hip rotation center. METHODS: A retrospective research was conducted involving 56 patients who underwent surgical resection of pelvic tumors followed by modular hemipelvic prosthesis reconstruction between 2010 and 2016. Comprehensive data encompassing preoperative conditions, intraoperative and postoperative follow-up information were systematically collected. Limb function was evaluated at 1, 3, 6, and 12 months postoperatively using the Musculoskeletal Tumor Society Scores (MSTS). The positional deviation of the hip joint's rotational center was quantified. Statistical analyses were performed utilizing SPSS 26.0 software. RESULTS: All surgical interventions were successful, with an average operation time of 268.82 ± 42.17 min and mean intraoperative blood loss of 1086.64 ± 538.28 ml. Postoperative complications were noted in 26.79% of patients, predominantly comprising incision-related issues. Hip dislocation was documented in 5.4% of cases, while seven patients experienced prosthesis loosening or fracture during follow-up. A statistically significant improvement in MSTS scores was observed, increasing from an average of 14.3 at 1 month to 21.1 at 12 months postoperatively. The recorded minor deviations in the position of the prosthetic hip joint's rotational center did not exhibit a significant correlation with functional outcomes. The observed survival rates were 94.64%, 83.93%, 73.21%, and 48.21% at 1, 2, 3, and 5 years, respectively. CONCLUSIONS: The modular hemipelvic prosthesis serves as an effective reconstructive solution for bone defects resulting from pelvic tumor resection, facilitating early functional rehabilitation. The prosthesis demonstrates commendable adaptability and mechanical properties, with a low incidence of complications such as hip dislocation and wound-related issues, thereby contributing to favorable functional recovery of the affected limb.