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  • Title: Comparative radiographic and clinical outcome of two-hole and multi-hole symphyseal plating.
    Author: Sagi HC, Papp S.
    Journal: J Orthop Trauma; 2008 Jul; 22(6):373-8. PubMed ID: 18594300.
    Abstract:
    OBJECTIVES: To report on the radiographic and clinical outcome of symphyseal plating techniques, with specific attention to the incidence of implant failure, reoperation secondary to implant complication, and ability to maintain reduction of the pelvic ring. DESIGN: Retrospective chart and radiographic review. SETTING: Level 1 trauma center. PATIENTS: A total of 229 skeletally mature patients with traumatic pelvic disruptions associated with pubic symphysis diastasis requiring open reduction internal fixation. INTERVENTION: Symphyseal plating: (1) group THP, a two-hole plate; (2) group MHP, a multi-hole plate (minimum 2 holes/screws on either side of the symphysis). Patients were analyzed with respect to technique of anterior ring fixation and posterior ring injury pattern and fixation. MAIN OUTCOME MEASUREMENT: Retrospective review of charts and radiographs immediately after the index procedure to latest follow-up was performed. Analysis included pelvic ring injury, type of anterior and/or posterior fixation, maintenance of postoperative reduction, rate of implant failure, and need for reoperation secondary to implant complication. Additionally, logistic regression analysis was performed to detect correlation between any other variable (posterior injury pattern, presence or absence of posterior fixation, time to surgery) and failure or malunion. Statistical analyses were performed using SPSS software. RESULTS: A total of 92 complete data sets were available for review. There were 51 patients in group THP and 41 patients in group MHP. When comparing the results of the 2 different methods of anterior fixation (THP versus MHP), the rate of fixation failure was greater in group THP (17 of 51; 33%) than group MHP (5 of 41; 12%). This was statistically significant (P = 0.018). When evaluating the presence of a malunion as a result of these 2 treatment methods, there were more present in the THP group (29 of 51; 57%) than in the MHP group (6 of 41; 15%). Again, this was highly statistically significant (P = 0.001). Although the reoperation rate was slightly higher in the THP group (16%) as compared to the MHP group (12%), this was not statistically significant (P = 0.67). Logistic regression analysis did not reveal any other variables to correlate as a risk factor for failure or malunion in this group of patients. CONCLUSIONS: In this group of patients, the two-hole symphyseal plating technique group had a higher implant failure rate and, more importantly, a significantly higher rate of pelvic malunion. On the basis of these findings, we recommend multi-hole plating of unstable pubic symphyseal disruptions.
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