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Evaluation of mandibular morphologic measurements and trabecular structure among subgroups of impacted mandibular third molars

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Abstract

Objective

To investigate mandibular morphologic measurements and trabecular structures that may cause mandibular third molar (MM3) impaction according to MM3 subgroups.

Methods

A total of 150 MM3 of 2175 panoramic radiographs (PRs) were reviewed. MM3s according to Winter (vertical), Pell & Gregory Class 1 and group: A, B, C on PRs were included in the study group. Fractal dimensions (FD) and mandibular morphologic measurements were evaluated. Statistical analysis for parametric values was performed using one-way analysis of variance (ANOVA). Statistical analysis for non-parametric values was performed using the Kruskal–Wallis H test.

Results

Statistically, a significant difference was found only in terms of angle of impaction among the groups of MM3 (p < 0.05) [Winter (vertical), and Pell & Gregory Class 1 and group A, B, C]. There was no difference among groups A, B, C in mandibular morphology and trabecular structure, but group C showed different characteristics than the other groups only in terms of impaction angle.

Conclusion

The trabecular structure and morphometric properties except for the angle of impaction do not affect impacted MM3s with adequate retromolar space and vertical angle.

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Authors and Affiliations

  1. Department of Orthodontics, Faculty of Dentistry, Recep Tayyip Erdoğan University, Rize, Turkey

    Merve Gonca & Irem Karamehmetoglu

  2. Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Recep Tayyip Erdoğan University, Rize, Turkey

    Dilara Nil Gunacar & Taha Emre Kose

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  1. Merve Gonca
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  2. Dilara Nil Gunacar
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  3. Taha Emre Kose
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  4. Irem Karamehmetoglu
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Contributions

MG conceived the ideas; MG, DNG and TEK collected the datas; DNG and TEK assessed the datas; MG analysed the data, MG and IK led the writing. All authors approved the final form of the manuscript.

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Correspondence to Merve Gonca.

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All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2008. Informed consent was obtained from all patients for being included in the study.

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The study design was approved by the Ethics Committee of the Recep Tayyip Erdogan University Faculty of Medicine.

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Gonca, M., Gunacar, D.N., Kose, T.E. et al. Evaluation of mandibular morphologic measurements and trabecular structure among subgroups of impacted mandibular third molars. Oral Radiol 38, 63–71 (2022). https://doi.org/10.1007/s11282-021-00527-5

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