Graduation Date

Fall 12-17-2021

Document Type

Thesis

Degree Name

Master of Science (MS)

Programs

Medical Sciences Interdepartmental Area

First Advisor

Peter J. Giannini

Second Advisor

Meenakshi Viswanath

Third Advisor

Gregory G. Oakley

Abstract

Cervical vertebrae are in close relationship with dentofacial structures due to their anatomical position. In previous studies, the inclination of cervical vertebrae was measured by mostly Nasion-Sella line as the reference plane to evaluate the relationship with dentofacial structures.

The aim of this study is to observe the correlation between cervical vertebrae inclination and lateral cephalometric measurements. 124 lateral cephalograms taken in Natural Head Position of subjects over 18 years of age were traced with Dolphin Imaging Software 11.95 Premium. Cervical vertebrae inclination was measured by using the lines passing from landmarks on second, third and forth cervical vertebrae. Correlation analyses were utilized to detect association between cervical vertebrae and dentofacial measurements.

Significant positive correlation was found between C2-C4 central inclination with SNA, SNB, U1-SN in females. In Caucasians, C2-C4 central inclination was found to be positively correlated to SNA, SNB and negatively correlated to age. C2-C3 posterior inclination was found to be positively correlated with SNA in the non-Caucasian and female groups. C3-C4 posterior inclination showed significant positive correlation with FHMPA, U1-SN, U1-FH and significant negative correlation with interincisal angle in females. In the Caucasian group, C3-C4 posterior inclination was found to be negatively correlated with age. In the non-Caucasian group, C3-C4 posterior inclination showed significant positive correlation with IMPA and significant negative correlation with SNB, interincisal angle and facial angle.

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