A  retrospective study on the relationship between alveolar-bone morphology at the mandibular incisors and their inclination in adults with low-angle, skeletal class III malocclusion

Zaineb Abbas; Iffra Tariq; Nusrat Ali; Kanza Nawadat; Sania Saqib; Maham Niazi

doi:10.53730/ijhs.v7nS1.14199

Authors

Zaineb Abbas
zainebabbas0@gmail.com
BDS, M.Sc (Oral Biology), Assistant Professor, Department of Oral Biology, Bakhtawar Amin Medical and Dental College, Multan
Iffra Tariq BDS, Foundation University Medical College, Islamabad
Nusrat Ali BDS, M.Phil (Biochemistry), Assistant Professor, Department of Biochemistry, HBS Medical and Dental College, Islamabad
Kanza Nawadat BDS, M.Sc (Oral Biology), Assistant Professor, Department of Oral Biology, Akhtar Saeed Medical and Dental College, Lahore
Sania Saqib BDS, M.Sc (Oral Biology), Assistant Professor, Department of Oral Biology, Islamabad Medical and Dental College, Bharakahu, Islamabad
Maham Niazi BDS, M.Sc (Oral Biology), Professor, Department of Oral Biology, Islamabad Medical and Dental College, Bharakahu, Islamabad

Keywords:

malocclusion, alveolar bone loss, cone-beam computed tomography, labial inclination

Abstract

Background and Aim: The orthodontic tooth movements should be such that the tooth moves safely within the alveolar bone. The alveolar bone around the mandibular central incisors of patients with skeletal class I and II malocclusion is thicker in comparison to those with skeletal class III malocclusion. The present study aimed to investigate an association between low angle inclination skeletal class-III malocclusion and the alveolar bone morphology around it. Materials and Methods: A retrospective study was carried out on 75 malocclusion patients in the Orthodontics Department of a Tertiary Care Hospital of Islamabad, Pakistan from January 2020 to December 2022. The malocclusions were confirmed in the patients via cone beam computed tomography (CBCT) imaging. The low angle, skeletal class III malocclusions were categorized into three different groups: Group-I (lingual-inclination), Group-II (upright), and Group-III (labial-inclination). Outcomes such as height of alveolar bone and area of cortical as well as cancellous thickness were determined independently on each side. Results: The labial cancellous bone thickness, thickness of labial cortical bone, alveolar bone total thickness, labial alveolar bone total area, and labial alveolar bone height were highest in group-III (labial-inclination). There was a positive correlation between mandibular central incisors and other aforementioned variables.

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