Evaluation of Articular Eminence Inclination in Normo-Divergent Subjects with Different Skeletal Classes through CBCT.

Francesco Moscagiuri,Erica Di Maria,Francesco Caroccia,Beatrice Di Carlo,Michele D’Attilio,Felice Festa,Chiara Lopes

doi:10.3390/ijerph18115992

Francesco Moscagiuri, Erica Di Maria + Show 5 more

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https://doi.org/10.3390/ijerph18115992

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Abstract

(1) We aimed to compare articular eminence inclination (AEI) in normo-divergent subjects (SN^GoGn = 32° ± 5°), with different anteroposterior sagittal skeletal classes through a cone beam computed generated tomography (CBCT). (2) In this cross-sectional study, CBCT records were retrospectively analysed. From the original sample of 52 CBCT records, 33 records of normo-divergent adult subjects were selected (11 Class I, 13 Class II and 9 Class III). On mid-sagittal section of the Temporomandibular Joint (TMJ) on both sides, AEI was calculated by graphic method. (3) The Kruskal–Wallis test was used to evaluate any difference between AEI on both left and right sides in the three groups. No statistically significant difference was observed on either the right side (p = 0.174) or the left side (p = 0.624). (4) Articular eminence inclination seems to be not related with skeletal class. Given the lack of significance in the observed differences between AEI and skeletal classes, we believe that future studies should focus on assessing possible relationships between AEI and different vertical skeletal patterns.

Highlights

The articular eminence inclination (AEI) is an angle formed by the articular eminence and the Frankfort Horizontal (FH) plane or any other horizontal plane [4]
Following a group formation similar to that reported by Paknahad et al [23], our study aims to evaluate AEI in a group of normodivergent (SNGoGn = 32◦ ± 5◦ ) subjects subdivided according to the sagittal skeletal pattern with the scope of identifying a possible and specific correlation between sagittal but not vertical pattern and AEI
According to the integrated cephalometric analysis, the 33 normodivergent subjects were divided into three groups with different skeletal classes (Table 2): 11 subjects (5 male were divided into three groups with different skeletal classes (Table 2): 11 subjects (5 male and 6 female) were evaluated as Class I, 13 (6 male and 7 female) as Class II and 9 (4 male and 6 female) were evaluated as Class I, 13 (6 male and 7 female) as Class II and 9

Summary

Introduction

The articular eminence inclination (AEI) is an angle formed by the articular eminence and the Frankfort Horizontal (FH) plane or any other horizontal plane [4] To delimit this angle, the plane that surrounds AE could be taken from the best-fit line on the slope of the eminence, or with a line connecting the roof of the fossa with the highest point of eminence [4]. The plane that surrounds AE could be taken from the best-fit line on the slope of the eminence, or with a line connecting the roof of the fossa with the highest point of eminence [4] Both planes define the AEI, but while the former focuses on the posterior surface of the eminence, the latter better describes the location of the eminence crest relative to the fossa roof.

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