Internal architecture of the mandibular condyle of rabbits is related to dietary resistance during growth.

The Journal of Experimental Biology
Claire E TerhuneMatthew J Ravosa

Abstract

Although there is considerable evidence that bone responds to the loading environment in which it develops, few analyses have examined phenotypic plasticity or bone functional adaptation in the masticatory apparatus. Prior work suggests that masticatory morphology is sensitive to differences in food mechanical properties during development; however, the importance of the timing/duration of loading and variation in naturalistic diets is less clear. Here, we examined microstructural and macrostructural differences in the mandibular condyle in four groups of white rabbits (Oryctolagus cuniculus) raised for a year on diets that varied in mechanical properties and timing of the introduction of mechanically challenging foods, simulating seasonal variation in diet. We employed sliding semilandmarks to locate multiple volumes of interest deep to the mandibular condyle articular surface, and compared bone volume fraction, trabecular thickness and spacing, and condylar size/shape among experimental groups. The results reveal a shared pattern of bony architecture across the articular surface of all treatment groups, while also demonstrating significant among-group differences. Rabbits raised on mechanically challenging diets have signific...Continue Reading

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Citations

Feb 16, 2021·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Susan E LadMatthew J Ravosa
Mar 19, 2021·Frontiers in Endocrinology·Sonja BuvinicViviana Toro-Ibacache
Aug 28, 2021·Animals : an Open Access Journal From MDPI·Pablo Jesús Marín-García, Lola Llobat

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