Comparison of the position of the mandibular fossa using 3D CBCT in different skeletal frames in human caucasic skulls

Basili, Cristian; Costa, Hélder Nunes; Sasaguri, Kenichi; Akimoto, Susumu; Slavicek, R; Sato, Sadao

doi:10.1007/s12548-009-0031-y

Cited by 14 publications

(6 citation statements)

References 41 publications

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“…A more anterior position of the mandibular fossa has been associated with class III jaw relationship, and a more posterior position of the mandibular fossa with class II jaw relationship (Droel & Isaacson, 1972; Williams & Andersen, 1986; Baccetti et al. 1997; Basili et al. 2009; Innocenti et al.…”

Section: Discussionmentioning

confidence: 99%

A computerized tomography study of the morphological interrelationship between the temporal bones and the craniofacial complex

2012

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The hypothesis that the temporal bones are at the center of the dynamics of the craniofacial complex, directly influencing facial morphology, has been put forward long ago. This study examines the role of the spatial positioning of temporal bones (frontal and sagittal inclination) in terms of influencing overall facial morphology. Several 3D linear, angular and orthogonal measurements obtained through computerized analysis of virtual models of 163 modern human skulls reconstructed from cone-beam computed tomography images were analyzed and correlated. Additionally, the sample was divided into two subgroups based on the median value of temporal bone sagittal inclination [anterior rotation group (n = 82); posterior rotation group (n = 81)], and differences between groups evaluated. Correlation coefficients showed that sagittal inclination of the temporal bone was significantly (P < 0.01) related to midline flexion, transversal width and anterior-posterior length of the basicranium, to the anterior-posterior positioning of the mandible and maxilla, and posterior midfacial height. Frontal inclination of the temporal bone was significantly related (P < 0.01) to basicranium anteriorposterior and transversal dimensions, and to posterior midfacial height. In comparison with the posterior rotation group, the anterior rotation group presented a less flexed and anterior-posteriorly longer cranial base, a narrower skull, porion and the articular eminence located more superiorly and posteriorly, a shorter posterior midfacial height, the palatal plane rotated clockwise, a more retrognathic maxilla and mandible, and the upper posterior occlusal plane more inclined and posteriorly located. The results suggest that differences in craniofacial morphology are highly integrated with differences in the positional relationship of the temporal bones. The sagittal inclination of the temporal bone seems to have a greater impact on the 3D morphology of the craniofacial complex than frontal inclination.

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Section: Discussionmentioning

confidence: 99%

A computerized tomography study of the morphological interrelationship between the temporal bones and the craniofacial complex

2012

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“…All the patients’ CBCT images were oriented so that the palatal plane (anterior nasal spine to posterior nasal spine) in the sagittal sections and the infraorbital plane (right infraorbital foramen to left infraorbital foramen) in the coronal sections were parallel to the floor [ 19 ]. Four axial sections parallel to the palatal plane [ 12 , 15 , 16 ] were measured (Fig.…”

Section: Methodsmentioning

confidence: 99%

The immediate effect of alternate rapid maxillary expansions and constrictions on the alveolus: a retrospective cone beam computed tomography study

Gandedkar

Liou

2018

Prog Orthod.

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BackgroundRapid maxillary expansion reduced the expander’s anchor teeth buccal alveolar bone thickness. However, the effects of alternate rapid maxillary expansions and constrictions (Alt-RAMEC) on the expander’s anchor teeth alveolar thickness has not been assessed. The purpose of this retrospective study was to evaluate the effects of Alt-RAMEC on the alveolus surrounding the anchor teeth of a double-hinged expander.MethodsTwenty-six individuals, including 12 males (11.5 ± 1.00 years) and 14 females (11.5 ± 0.90 years), who had double-hinged expander for 7 weeks of Alt-RAMEC and then 3 months of maxillary protraction, were included. Their cone beam computed tomography (CBCT) images taken 3–6 months before treatment (T0) and after 7 week of Alt-RAMEC (T1), were studied for the buccal alveolar bone thickness (BABT) and palatal alveolar bone thickness (PABT) of the expander’s anchor teeth (first molars and first and second premolars) in four axial sections. The intra-class correlation coefficient, Dahlberg’s formula, and paired t tests were used to analyze the method errors, and the intra-group changes of the BABT and PABT at T0-T1 were analyzed by paired t test (p < 0.05).ResultsThe 7 weeks of Alt-RAMEC significantly reduced the BABT of the expander’s anterior anchor teeth (0.54~ 70 mm, p < 0.05) and at the cervical region (0.14~ 0.25 mm, p < 0.05), but not at the apical region of the expander’s posterior anchor teeth. The reduction of BABT by 7 weeks of Alt-RAMEC was within the scope of the initial BABT. On the opposite, the Alt-RAMEC significantly (p < 0.05) increased the PABT in the anterior anchor teeth and the cervical region of posterior anchor teeth.ConclusionsA 7-week protocol of Alt-RAMEC with double-hinged expander for maxillary protraction might reduce the buccal alveolar bone thickness of the expander’s anchor teeth, although the reduction is within the scope of initial alveolar thickness of the expander’s anchor teeth.

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“…A plastic holder was custom-designed to support skulls during CT scanning. For the details on image acquisition see Basili et al [ 2 ].…”

Section: Methodsmentioning

confidence: 99%

Vertical facial height and its correlation with facial width and depth

Wang

Otsuka

Akimoto

et al. 2013

J. Stomat. Occ. Med.

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IntroductionThe aim of the present study was to evaluate how vertical facial height correlates with mandibular plane angle, facial width and depth from a three dimensional (3D) viewing angle.MethodsIn this study 3D cephalometric landmarks were identified and measurements from 43 randomly selected cone beam computed tomography (CBCT) images of dry skulls from the Weisbach collection of Vienna Natural History Museum were analyzed. Pearson correlation coefficients of facial height measurements and mandibular plane angle and the correlation coefficients of height-width and height-depth were calculated, respectively.ResultsThe mandibular plane angle (MP-SN) significantly correlated with ramus height (Co-Go) and posterior facial height (PFH) but not with anterior lower face height (ALFH) or anterior total face height (ATFH). The ALFH and ATFH showed significant correlation with anterior cranial base length (S-N), whereas PFH showed significant correlation with the mandible (S-B) and maxilla (S-A) anteroposterior position.ConclusionsHigh or low mandibular plane angle might not necessarily be accompanied by long or short anterior face height, respectively. The PFH rather than AFH is assumed to play a key role in the vertical facial type whereas AFH seems to undergo relatively intrinsic growth.

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Comparison of the position of the mandibular fossa using 3D CBCT in different skeletal frames in human caucasic skulls

Cited by 14 publications

References 41 publications

A computerized tomography study of the morphological interrelationship between the temporal bones and the craniofacial complex

A computerized tomography study of the morphological interrelationship between the temporal bones and the craniofacial complex

The immediate effect of alternate rapid maxillary expansions and constrictions on the alveolus: a retrospective cone beam computed tomography study

Vertical facial height and its correlation with facial width and depth

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