An ultrasonographic evaluation of masseter muscle thickness in different dentofacial patterns Rohila AK, Sharma VP, Shrivastav PK, Nagar A, Singh GP - Indian J Dent Res
Indian Journal of Dental Research (IJDR) is the official publication of the Indian Society for Dental Research (ISDR), India section of the International Association for Dental Research (IADR).
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ie strong masseters correlate with having a horizontally wide and vertically short skull.Masseter muscle thickness was found to be negatively correlated to vertical facial pattern and positively associated with transverse craniofacial morphology.
strong masseters = small gonial angleMandibular plane angle and gonial angle showed significant (P < 0.01) negative correlation with MMTC for the total sample.
the convex surface of angle of mandible tends to become minutely more concave with respect to its resting shape. This stimulates the osteoblastic activity and addition of bone matrix at the periosteal surface, gradually producing a more acute angle.
stresses exerted on the mandible will cause bone to be deposited there
if i interpreted this correctly then i think they are saying chewing forces deposit bone at the joint where the two halves of the mandible are fused and thus make it wider?the stimulating influence of masticatory pressure applied to bone tissue is important in the development of bone thickness at mandibular symphysis.
this is nothing newsubjects with thick muscle have broader faces and wide arches.
i was not expecting this. is it really possible chewing influences not only horizontal growth but also forward growth and growth at the mid palatal suture?The increased loading of the jaws due to masticatory muscle hyperfunction may lead to increased sutural growth and bone apposition, resulting in an increased transversal growth of the maxilla