The influence of arch shape on the incidence of third molar impaction: A cross-sectional study

Impaction of third molar is a pathological problem that reduces the chance of normal eruption of tooth. The main reason for impaction is inadequate space in the maxillary and mandibular arch. The aim of this study is to investigate the relationship between arch shape and the prevalence of third mola...

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Bibliographic Details
Published in:The Saudi dental journal 2024-09, Vol.36 (9), p.1221-1226
Main Authors: Bakri, Mohammed M., Ali Ali Hezam, Asma, Ahmad Qurishi, Ahtesham, Alotaibi, Faisal I., Sulaiman Aljabri, Yahya, Sharrahi, Haitham M, Omar Hablool, Manar, Mohammed Arishy, Layla
Format: Article
Language:English
Subjects:
Bell
Gregory classification
Impaction, third molar
ORIGINAL ARTICLE
Orthopantomogram
Pattern
The shape of arch
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Summary:Impaction of third molar is a pathological problem that reduces the chance of normal eruption of tooth. The main reason for impaction is inadequate space in the maxillary and mandibular arch. The aim of this study is to investigate the relationship between arch shape and the prevalence of third molar impaction. This cross‑sectional study was performed on patients referring to the Department of Oral and Maxillofacial Surgery between December 2023 and February 2024 to obtain an orthopantomogram (OPG). Convenience sampling was employed, and orthopantomograms were analyzed to determine impaction types. Dental arch shape variables were assessed using Budiman’s analysis, with a Chi-square test employed to evaluate any significant association between arch shape and impaction type at a significance level of 0.05. Among the 185 maxilla and 185 mandibles studied, 154 were male patients, and 216 were female patients, with a mean age of 26.75 years. A statistically significant difference was found in impacted teeth, among females having more impacted molars than males (p-value = 0.002*). However, no significant differences were found in the type of impaction, Gregory classification, or position based on the shape of the mandible on both the right and left sides (p-value > 0.05). Similarly, no significant differences were observed in Gregory’s classification based on the shape of the maxilla on both the right and left sides. However, there is a statistically significant difference in the occurrence impaction based on the maxilla’s shape (p-value 
ISSN:1013-9052
1658-3558
DOI:10.1016/j.sdentj.2024.07.003