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Split‐line patterns of the mandible following masseterectomy in adult and growing monkeys
Author(s) -
Madeira Miguel C.,
Matheus Maria Tereza G.,
de Oliveira J. Americo,
Watanabe IiSei
Publication year - 1977
Publication title -
american journal of physical anthropology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.146
H-Index - 119
eISSN - 1096-8644
pISSN - 0002-9483
DOI - 10.1002/ajpa.1330470109
Subject(s) - mandible (arthropod mouthpart) , anatomy , masseter muscle , adult male , biology , zoology , genus , endocrinology
Architectural changes of the mandibular ramus following masseterectomy were analyzed by means of the split‐line technique in both adult and growing monkeys. The right masseter muscle was resected in ten tufted capuchin monkeys (Cebus apella) and they were sacrificed following a 12‐month period. Along with modifications in the shape of the mandible, the masseterectomy induced structural changes as revealed by alterations in the split‐line patterns. These changes were much more evident in the adult animals. In growing monkeys, intrinsic forces determine an architecture of mandibular growth, represented by the direction of the splits. This is not influenced by the lack of mechanical factors like muscle action. Conversely, the final fibrous architecture of the bone in the adult monkey may be modified by extrinsic mechanical factors.