AUTHOR=Soltero-Rivera Maria , Elliott Matthew I. , Hast Michael W. , Shetye Snehal S. , Castejon-Gonzalez Ana C. , Villamizar-Martinez Lenin A. , Stefanovski Darko , Reiter Alexander M. TITLE=Fracture Limits of Maxillary Fourth Premolar Teeth in Domestic Dogs Under Applied Forces JOURNAL=Frontiers in Veterinary Science VOLUME=5 YEAR=2019 URL=https://www.frontiersin.org/journals/veterinary-science/articles/10.3389/fvets.2018.00339 DOI=10.3389/fvets.2018.00339 ISSN=2297-1769 ABSTRACT=
A cadaveric study was performed to investigate the external mechanical forces required to fracture maxillary fourth premolar teeth in domestic dogs and describe a clinically relevant model of chewing forces placed on functionally important teeth in which fracture patterns are consistent with those defined by the American Veterinary Dental College (AVDC). Twenty-four maxillary fourth premolar teeth were harvested from dog cadavers. Samples consisted of teeth with surrounding alveolar bone potted in polycarbonate cylinders filled with acrylic. The cylinders were held by an aluminum device at an angle of 60° with respect to the ground. An axial compression test was performed, creating a force upon the occluso-palatal aspects of the main cusps of the crowns of the teeth. The highest compressive force prior to failure was considered the maximum force sustained by the teeth. Results showed the mean maximum force (± SD) sustained by the tested teeth at the point of fracture was 1,281 N (± 403 N) at a mean impact angle (± SD) of 59.7° (± 5.2°). The most common fracture type that occurred among all samples was a complicated crown fracture (