Decreased complications but a distinctive fixation loosening mechanism of fully threaded headless cannulated screw fixation for femoral neck fractures in young adults.

摘要: Despite being a commonly encountered injury in orthopedic practice, controversy surrounds the methods of optimal internal fixation for femoral neck fractures (FNF) young patients. The objective present study is to compare complication rates and failure mechanisms surgical FNF using fully threaded headless cannulated screws (FTHCS) versus partial (PTS) adults. A total 75 patients (18–65 years old) with were prospectively treated close reduction three parallel FTHCS compared historical control case-matched group (75 patients) by PTS fixation. After 2 follow-up, (including varus collapse, fracture displacement, shortening), nonunion, avascular necrosis head (ANFH) between two cohorts. demographic, follow-up information, radiological images assessed independent blinded investigators. Patient demographics patterns similar patient groups. overall 8% (6/75) cohort, which was significantly lower than 25.3% (19/75) seen group. Rates nonunion ANFH when When stratified severity (high-energy vs. low-energy fractures), rate significant use high-energy while there no difference or high patterns. Unique cohort an atypical screw migration pattern collapse (6/75, 8%). results show that could reduce FNF, especially (Garden III–IV, Pauwels III, vertical axis (VN) angle ≥ 15°). There also confirmation modes loosening FTCHS group, including “medial migration” superior cutout, different from withdrawal cohort. retrospectively registered at www.Chictr.org.cn ( ChiCTR-IPR-1900025851 ) on September 11, 2019.