Randomized control trial comparing the titanium osteosynthesis and the biodegradable osteosynthesis in mandibulotomy access.

BACKGROUND

The clinical degradation rate and strength of biodegradable implant exposed to postoperative radiotherapy (PORT) are unknown.

METHODS

A prospective randomized control trial of 40 consecutive mandibulotomy patients randomly divided into titanium and biodegradable cohorts. All patients received PORT. The following parameters were compared: maximal mouth opening, occlusal force, center of force trajectory, occlusal status, radiographic evidence of bony union, mandibular function impairment questionnaire (MFIQ), overall satisfaction score, and complication rates.

RESULTS

Both the mandibular function and occlusal status parameter of the biodegradable and the titanium groups were not significantly difference. Biodegradable cohort showed better MFIQ scores (P = .08) and overall satisfaction scores (P = .64) but was not statistically significant. Of note, 40% of patients in the titanium cohort complained of plate palpability/cold intolerance and required plate removal (P = .02); 10% of patients in the titanium cohort developed osteoradionecrosis.

CONCLUSION

Biodegradable osteosynthesis is as reliable as titanium osteosynthesis for mandibulotomy fixation. PORT did not increase the complication rate in the biodegradable group.