Assessment of mandibular ramus thickness in Afro-Brazilian subjects using computed tomography

Paula Bonfim Almeida Costa; Marcos Alan Vieira Bittencourt; Iêda Margarida Crusoé Rocha Rebello

doi:10.4103/2278-9626.134842

European Journal of General Dentistry, Inhaltsverzeichnis

CC BY-NC-ND 4.0 · European Journal of General Dentistry 2014; 3(02): 140-145
DOI: 10.4103/2278-9626.134842

Original Article

Assessment of mandibular ramus thickness in Afro-Brazilian subjects using computed tomography

Paula Bonfim Almeida Costa

Department of Orthodontics, School of Dentistry, Federal University of Bahia, Salvador, Bahia, Brazil

,

Marcos Alan Vieira Bittencourt

Department of Orthodontics, School of Dentistry, Federal University of Bahia, Salvador, Bahia, Brazil

,

Iêda Margarida Crusoé Rocha Rebello

¹Department of Radiology, School of Dentistry, Federal University of Bahia, Salvador, Bahia, Brazil

› Institutsangaben

Abstract

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Abstract

Purpose: The purpose of this study was to investigate whether the skeletal pattern in the anteroposterior and vertical directions influences mandibular ramus thickness in Afro-Brazilian subjects, using computed tomography (CT). Materials and Methods: CT images of 45 individuals of Afro-Brazilian, from both genders, aged ranges between 19 and 46 years, were used. Determination of the skeletal pattern in the anteroposterior direction was based on the association of the ANB and WITS values, and in the vertical direction, through the GoGn-SN angle. Measurement of the mandibular ramus was performed just above the lingula in the coronal plane after three-dimensional reconstruction of the image and multiplanar analysis. Results: Twenty-seven of the 45 images were from individuals with Class I skeletal pattern, 13 Class II and 5 Class III, with means of 7.19 mm, 7.15 mm and 7.3 mm, respectively (P = 0.95). In the vertical direction, 4 individuals exhibited reduced vertical skeletal pattern, 28 normal pattern and 13 increased pattern, with means of 7.01 mm, 7.15 mm and 7.33 mm, respectively (P = 0.77). Conclusion: No statistically significant difference was found in mandibular ramus thickness in the different skeletal patterns, both in the anteroposterior and vertical directions.

Keywords

African Continental Ancestry Group - mandible - osteotomy - sagittal split ramus - tomography - X-ray

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Referenzen

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