In vitro comparison of biomechanical characteristics of sagittal split osteotomy fixation techniques

In vitro evaluation of conventional and locking miniplate/screw systems for the treatment of mandibular angle fractures

“…They reported that this type of fixation is solid and strong enough to withstand the forces exerted by the masticatory muscles, being a simpler and successful osteosynthesis method. Similar results have been observed in clinical and biomechanical studies 3,4,19,21,23,25 . The present study observed that the use of a larger number of screws may increase instability.…”

Comparison of five different fixation techniques of sagittal split ramus osteotomy using three-dimensional finite elements analysis

“…The authors' previously 20 found that linear 908 and inverted L bicortical screw configurations present the highest mechanical resistance, followed by the linear 608 bicortical screws pattern and the miniplate with four monocortical screws. These results concerning screw arrangement are similar to others, 6,12,13,15,16,26,27 although they did not portray any difference between linear and inverted L arrangements. 23 The results obtained by FEA, showed that stress amount and (especially) stress distribution performed better when the inverted L screw arrangement was used, compared with linear configuration (both 908 and 608).…”

“…11,14,16,26,27 Clinically, the miniplate resistance is enough to promote bone healing during the postoperative period, as bite forces in the acute phase of the postoperative period are much weaker than those registered for the rest of the postoperative period or the non-operated population. 29 This lower mechanical resistance is due to inferior bone contact in the osteotomy region compared with the use of bicortical screws, as well as the fact that the miniplate receives the greater part of the masticatory load with great stress concentration around the screws in areas of little bone thickness.…”

An assessment of impact strength of the mandible

“…However, cadaver mandibles are not readily available the large numbers necessary in order to investigate the biomechanics of the mandible. Furthermore, the mandible of sheep has been used to test mandibular osteosynthesis systems successfully in several other studies (Abu-Serriah et al, 2005;Ozden et al, 2006;Alkan et al, 2007).…”