J Korean Assoc Oral Maxillofac Surg.  2002 Dec;28(6):464-471.

A photoelastic study on effects of bone reduction forceps on mandibular fracture reduction

• Park JH
• Choi BH
• Yoo TM
• Huh JY

Abstract

The purpose of this study was to evaluate the stress patterns within fractured mandibles generated by reduction forceps and to determine the optimal position of the reduction forcep. Twenty-seven mandibular models were fabricated using a photoelastic resin. Each of the three sets of mandible models prepared was osteotomized according to one of three different fracture types(symphysis, parasymphysis and body fractures). After reducing the cut segments, a reduction forcep was placed into different engagement holes to compress the segments. Photoelastic stress analysis was used to visualize the stress patterns within the fractured mandiblular models generated by the reduction forcep. In the case of symphysis or parasymphysis fractures, an optimum distribution of stress over the fracture site was achieved when placing the reduction forcep more than 12.5 mmon either side of the fracture line between the midway level bisecting the mandible and 5 mm below the level. In the case of body fractures, optimum stress distribution was achieved when the reduction forcep was placed more than 15 mm from the fracture line on the midway level. In conclusion, a correct use of reduction forceps helps to provide a precise three-dimensional reduction for mandibular fractures.

MeSH Terms

Mandible
Mandibular Fractures*
Surgical Instruments*