A cross-sectional study on the relationship between craniofacial morphology and the coronoid process

Abstract

Although there have been some reports on the relationship between craniofacial morphology and the activity of the temporal muscle attached to the coronoid process, such relationship is still unclear. The aim of the present study was therefore to investigate the relationship between the coronoid process and overall craniofacial morphology using lateral cephalograms of 60 female subjects (mean age 9.6 years) without mandibular deviation. Statistical testing was undertaken using stepwise regression analysis. Anterior coronoid marginal depth correlated negatively (r = 0.71) with gonial angle, SNA, and overjet. The coronoid angle also correlated negatively (r = 0.86) with both the vertical and horizontal lengths from sella to the coronoid tip as well as with the horizontal length from sella to the posterior ramus margin. Furthermore, the coronoid length correlated positively (r = 0.61) with the coronoid angle and the anterior coronoid marginal depth. The coronoid width was also positively (r = 0.69) correlated with overbite. Coronoid process morphology is related not only to mandibular morphology and position but also to maxillary position and the dental relationship in the anterior region. It therefore seems clear that coronoid process morphology might be related to temporal muscle functioning and its associated craniofacial morphological measurements.

Growth hormone receptor gene variant and three-dimensional mandibular morphology

“…20 The temporal muscle is attached to the coronoid process, and negative correlations have been observed between temporal muscle activity and mandibular plane and gonial angle and overjet. 21,22 A previous study examining the relationship between maxillofacial morphology and coronoid process morphology 23 revealed that the morphology of the coronoid process influences not only mandibular position but also maxillary position and dentition. A previous report describing the measurement of the coronoid processes using CBCT imaging 24 revealed that, in comparison with skeletal pattern differences, differences related to gender were greater in terms of craniofacial morphology and the volume and height of the coronoid processes.…”

Bone Surface Micro‐Topography at Craniofacial Entheses: Insights on Osteogenic Adaptation at Muscle Insertions

“…The extrapolated loading in this region is highly dynamic, whereby the loading vector changes dramatically through the contraction cycle of the temporalis m. At the beginning of the cycle, the contractile tension in tendon fibers would likely result in compression between concentrated fiber bundles at the mineralizing front, stimulating chondrogensis, and calcification. It is noteworthy that the coronoid process has been observed to reform in cases where it has been surgically removed (Gerbino et al, ) as well as reports of allometric relationships between temporalis m. and its morphology (Torisu et al, ). These findings illustrate this dynamic relationship where a change in muscle loading vector appears to result in mineralized front advancement until the forces are dissipated over a larger area and/or neutralized with the development of a functional adaptive bony lever.…”

Elongated coronoid process: CT-based quantitative analysis of the coronoid process and review of literature

“…Different authors address the anatomical variety of the coronoid process 25,41 . One measurement technique uses lateral cephalograms 52 . Thirteen skeletal landmarks were identified on the lateral cephalograms and 8 angular and 10 linear measurements were made on 368 orthodontic patients.…”