3/10/2023 0 Comments Nx i deas 6 1 crack erodes![]() ![]() If the protective buttressing hypothesis is correct, the primary differences in the face of robust versus gracile australopiths may be more a function of differences in mating system than differences in diet as is generally assumed. Specifically, the trend towards a more orthognathic face the bunodont form and expansion of the postcanine teeth the increased robusticity of the orbit the increased robusticity of the masticatory system, including the mandibular corpus and condyle, zygoma, and anterior pillars of the maxilla and the enlarged jaw adductor musculature are traits that may represent protective buttressing of the face. ![]() In this review, we suggest that many of the facial features that characterize early hominins evolved to protect the face from injury during fighting with fists.
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