The effect of dental occlusal disturbances on the curvature of the vertebral spine in rats.
Abstract: Aim: To determine how either a unilateral increase or decrease of the bite affects the curvatures of the vertebral spine. Also, to determine associations between the side of the bite alteration and the side of the displacement at the vertebral spine. Introduction: There is still controversy if alterations on the bite could affect the curvatures of the vertebral spine. Methods: 25 male ... read moremature Sprague Dawley rats were included in the study. Five animals in the control group received no alteration on their bite. Bite was increased on five animals on the right upper molars and five had that on the left molars. Molar teeth were extracted on the right side on other five animals and other five had that on the left side. Radiographs were taken on days 0, 7, 14 and 21. Distances from C4, T1, T6, T10 and L4 to a true vertical line were recorded on frontal radiographs and, from C4, T6 and L3 on lateral radiographs. Measurements were contrasted with repeated measures analysis. Significance was determined at 95 per-cent level of confidence. Results: The repeated measured analysis revealed statistically significant differences between the amount of the curvature at C4, T1 and T6 over time on the frontal radiographs (p<0.05), as well as at C4, T6 and L3 on the lateral radiographs (p<0.0001). Conclusion: Alterations in the dental occlusion affects the normal curvatures of the vertebral spine in rats. No associations were found between the side of alteration and the side of displacement of the vertebral spine.
Thesis (M.S.)--Tufts University, 2014.
Submitted to the Dept. of Other.
Advisors: Steven Scrivani, and Noshir Mehta.
Committee: Steven Scrivani, Noshir Mehta, Paul Stark, George Maloney, and Bob Mier.
Keywords: Dentistry, Kinesiology, and Health sciences.read less