Petrosal orientation and mandibular ramus breadth: Evidence for an integrated petroso-mandibular developmental unit

2004 ◽  
Vol 123 (4) ◽  
pp. 340-350 ◽  
Author(s):  
Markus Bastir ◽  
Antonio Rosas ◽  
Kazuto Kuroe
Keyword(s):  
Mandibular Ramus ◽  
Developmental Unit

scholarly journals Modelling growth curves of the normal infant’s mandible: 3D measurements using computed tomography

2021 ◽  
Author(s):  
Jan Aart M. Schipper ◽  
Manouk J. S. van Lieshout ◽  
Stefan Böhringer ◽  
Bonnie L. Padwa ◽  
Simon G. F. Robben ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Growth Models ◽  
Normal Growth ◽  
Growth Patterns ◽  
Ct Scans ◽  
Mandibular Ramus ◽  
Linear Measurements ◽  
Mandibular Growth ◽  
Gonial Angle ◽  
Mandibular Body

Abstract Objectives Data on normal mandibular development in the infant is lacking though essential to understand normal growth patterns and to discriminate abnormal growth. The aim of this study was to provide normal linear measurements of the mandible using computed tomography performed in infants from 0 to 2 years of age. Material and methods 3D voxel software was used to calculate mandibular body length, mandibular ramus length, bicondylar width, bigonial width and the gonial angle. Intra- and inter-rater reliability was assessed for these measurements. They were found to be sufficient for all distances; intra-class correlation coefficients were all above 0.9. Regression analysis for growth modelling was performed. Results In this multi-centre retrospective study, 109 CT scans were found eligible that were performed for various reasons (e.g. trauma, craniosynostosis, craniofacial abscesses). Craniosynostosis patients had larger mandibular measurements compared to non-craniosynostosis patients and were therefore excluded. Fifty-one CT scans were analysed. Conclusions Analysis showed that the mandible increases more in size vertically (the mandibular ramus) than horizontally (the mandibular body). Most of the mandibular growth occurs in the first 6 months. Clinical relevance These growth models provide insight into normal mandibular development in the first 2 years of life. This reference data facilitates discrimination between normal and abnormal mandibular growth.

scholarly journals A Morphometric Study of the Maxillary Artery and Lingula in Relation to Mandibular Ramus Osteotomies and TMJ Surgery

2010 ◽  
Vol 04 (02) ◽  
pp. 166-170 ◽  
Author(s):  
Huseyin Avni Balcioglu ◽  
Cenk Kilic ◽  
Altan Varol ◽  
Hasan Ozan ◽  
Necdet Kocabiyik ◽  
...  
Keyword(s):  
Infratemporal Fossa ◽  
Postoperative Hemorrhage ◽  
Morphometric Study ◽  
Maxillary Artery ◽  
Mandibular Ramus ◽  
Main Trunk ◽  
Tmj Ankylosis ◽  
Bony Landmarks ◽  
Inferior Border ◽  
Mandibular Notch

Objectives: Mandibular osteotomies and resection of the temporomandibular joint (TMJ) ankylosis are the mostly performed surgical procedures in the infratemporal fossa, which is in close proximity with the main trunk of the maxillary artery (MA). It is imperative to avoid the trunk or branches of the maxillary artery, otherwise, massive intraoperative or postoperative hemorrhage may develop. The goal of the study was to investigate the position of the maxillary artery in the infratemporal fossa and the lingula of the mandible.Methods: Significant landmarks were selected on the mandibles of formalin fixed cadavers, and the distances were measured between the maxillary artery and the bony landmarks with a digital caliper.Results: The average distances between the MA and the articular eminence, the medial cortex of the mandibular ramus, the inferior border of the pterygoid fovea and the mandibular notch were 1.67±0.48 mm, 5.38±2.47 mm, 16.84±1.74 mm, 2.94±0.52 mm, respectively. Course pattern of the MA at the subcondylar level was also mapped. In order to determine the position of the lingula, the average distances between the tip of the lingula and the mandibular notch, the inferior border of the ramus, the anterior margin of the ramus and posterior margin of the ramus were measured and found as 15.4±2.1 mm, 49.5±4.3 mm, 18.1±2.7 mm, 16.6±2.5 mm, respectively. No significant differences were found between the right and left sides, for all parameters.Conclusions: The studied parameters will assist and navigate clinicians to determine the anatomic proximity to the maxillary artery, and, minimize the risk of damaging the vessel. (Eur J Dent 2010;4:166-169)

A Modified Technique of Mandibular Ramus Sagittal Split Osteotomy for Prevention of Inferior Alveolar Nerve Injury

2017 ◽  
Vol 78 ◽  
pp. S108-S116 ◽  
Author(s):  
Peerasak Chortrakarnkij ◽  
Daniel Lonic ◽  
Hsiu-Hsia Lin ◽  
Kazuaki Yamaguchi ◽  
Sun-Goo Kim ◽  
...  
Keyword(s):  
Nerve Injury ◽  
Inferior Alveolar Nerve ◽  
Mandibular Ramus ◽  
Modified Technique ◽  
Sagittal Split Osteotomy ◽  
Inferior Alveolar Nerve Injury

Differential Cell Replication within the Periosteum of the Pig Mandibular Ramus

1996 ◽  
Vol 157 (2) ◽  
pp. 144-150 ◽  
Author(s):  
J.D. Decker ◽  
J.J. Marshall ◽  
S.W. Herring
Keyword(s):  
Cell Replication ◽  
Mandibular Ramus ◽  
Differential Cell

scholarly journals Biomechanical in vitro evaluation of three stable internal fixation techniques used in sagittal osteotomy of the mandibular ramus: a study in sheep mandibles

2012 ◽  
Vol 20 (4) ◽  
pp. 419-426 ◽  
Author(s):  
Leandro Benetti de Olivera ◽  
Eduardo Sant´Ana ◽  
Antonio José Manzato ◽  
Fábio Luis Bunemer Guerra ◽  
G. William Arnett
Keyword(s):  
Internal Fixation ◽  
Mandibular Ramus ◽  
In Vitro Evaluation ◽  
Fixation Techniques ◽  
Stable Internal Fixation

scholarly journals Remarks on Correlations and Implications of the Mandibular Structure and Diet in Some Seals (Mammalia, Phocidae)

2014 ◽  
Vol 48 (3) ◽  
pp. 255-268 ◽  
Author(s):  
I.A. Koretsky ◽  
S.J. Rahmat ◽  
N. Peters
Keyword(s):  
Mandibular Ramus ◽  
Morphological Examination ◽  
Dietary Preference ◽  
Angle Function ◽  
The Family ◽  
Condyloid Process ◽  
Size Ofthe ◽  
Mandibular Morphology ◽  
Process Measurements ◽  
Muscles Of Mastication

Abstract Remarks on Correlations and Implications of the Mandibular Structure and Diet in Some Seals (Mammalia, Phocidae). Koretsky, I. A., Rahmat, S. J., Peters, N. — The diverse representatives of Recent seals within the three extant subfamilies (Cystophorinae, Phocinae, Monachinae) of the family Phocidae exhibit dietary variations among species, feeding on invertebrates and a diversity of prey depending on the season and availability. To explain this variability, an introductory morphological examination of the mandibular structure of Recent seals from each subfamily was performed, focusing on: heights of the mandibular ramus and condyloid process; measurements of the masseteric fossa; and attachments of muscles of mastication. After measuring the condyloid angles (the inclination of the condyloid process in relation to the axis of the alveolar row) among the examined species, a correlation between the size ofthe angle, function, and diet was recognized. Seals with a tall mandibular ramus and greater condyloid angle (Cystophorinae) feed on larger-sized prey, while seals with a shorter ramus and lesser condyloid angle feed on small (Monachinae) to medium-sized (Phocinae) prey, regardless of the overall size of the seal. This study focused on the mandibular morphology of some living and fossil representatives of Phocidae, providing an association between functional and ecological interpretations of modern seals in general and extrapolating this knowledge for fossil dietary preference.

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