Top

BMC Oral Health

Published in:

Open Access 01-12-2023 | Research

Tomographic analysis of relationship of mandibular morphology and third molars eruption

Authors: Jéssica de Fátima Segantin, Gabriela Barbosa Bisson, Letícia Liana Chihara, Osny Ferreira Júnior

Published in: BMC Oral Health | Issue 1/2023

Abstract

Background

Lower third molars (L3M) are the last teeth to erupt in the oral cavity. Uneruption of these teeth still raises questions about its causes, in the literature (1) genetic factors, (2) dental lamina activity and, mainly, (3) insufficient growth and development of the bone bases are included. While the lack of space theory influenced by mandibular morphology and size of L3M was argued to be the main reason for L3M impaction, there is a limitation in the literature in examining such association using more accurate tomographic analysis obtained from CBCT. This work aimed to evaluate the relationship between mandibular morphology and the eruption of L3M.

Methods

In this regard, 85 Cone Beam Computed Tomographies (CBCT), with 147 L3M, were selected from the archives of the Department of Surgery, Stomatology, Pathology and Radiology, Bauru School of Dentistry, obtained using an Accuitomo® Morita device and using the Dolphin Imaging 11.9 software. L3M eruption was related to linear measurements of jaw length (Co-Gn), retromolar space dimension (D2R), mesiodistal width of the L3M crowns, mandibular first molars (L1M) and mandibular canines (LC) and the angle mandibular (Ar-Go-Me). Independent samples t-test, chi-square tests and logistic regression were performed adopting a significance level of 5%.

Results

The average mandible length of 116.446 mm + 6.415 mm, retromolar space of 11.634 mm + 2.385 mm, mesiodistal size of the L3M of 10.054 mm + 0.941 mm, sum of the mesiodistal widths of the L1M and LC of 15.564 mm + 1.218 mm and mandibular angle of 127.23° + 6.109. There was no statistically significant association between these factors and the eruption.

Conclusion

With the results obtained in this study, we conclude that the length and angle of the mandible, teeth size and dimension of the retromolar space are not associated with the L3M eruption.

Muhsin H, Brizuela M. Oral surgery, extraction of mandibular third molars. In: StatPearls. Treasure Island (FL): StatPearls Publishing; 2023.

Barone S, Antonelli A, Averta F, et al. Does Mandibular Gonial Angle Influence the Eruption Pattern of the Lower Third Molar? A Three-Dimensional Study. J Clin Med. 2021;10(18):4057. https://doi.org/10.3390/jcm10184057. Published 2021 Sep 8.CrossRefPubMedPubMedCentral

Demirel O, Akbulut A. Evaluation of the relationship between gonial angle and impacted mandibular third molar teeth. Anat Sci Int. 2020;95(1):134–42. https://doi.org/10.1007/s12565-019-00507-0.CrossRefPubMed

KalaiSelvan S, Ganesh SKN, Natesh P, Moorthy MS, Niazi TM, Babu SS. Prevalence and pattern of impacted mandibular third molar: an institution-based retrospective study. J Pharm Bioallied Sci. 2020;12(Suppl 1):S462–7. https://doi.org/10.4103/jpbs.JPBS_140_20.CrossRefPubMedPubMedCentral

Adeyemo WL, James O, Oladega AA, et al. Correlation between height and impacted third molars and genetics role in third molar impaction. J Maxillofac Oral Surg. 2021;20(1):149–53. https://doi.org/10.1007/s12663-020-01336-9.CrossRefPubMed

Pithon MM, Baião FCS, LIDA S’A, Silva Coqueiro R, Maia LC. Influence of the presence, congenital absence, or prior removal of third molars on recurrence of mandibular incisor crowding after orthodontic treatment: systematic review and meta-analysis. J World Fed Orthod. 2017. https://doi.org/10.1016/j.ejwf.2017.03.003.

Hattab FN, Alhaija ES. Radiographic evaluation of mandibular third molar eruption space. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 1999;88(3):285–91. https://doi.org/10.1016/s1079-2104(99)70029-6.CrossRefPubMed

Cortella S, Shofer FS, Ghafari J. Transverse development of the jaws: norms for the posteroanterior cephalometric analysis [published correction appears in Am J Orthod Dentofacial Orthop 1998 Mar;113(3):299]. Am J Orthod Dentofac Orthop. 1997;112(5):519–22. https://doi.org/10.1016/s0889-5406(97)70079-9.CrossRef

Carter K, Worthington S. Predictors of third molar impaction: a systematic review and Meta-analysis. J Dent Res. 2016;95(3):267–76. https://doi.org/10.1177/0022034515615857.CrossRefPubMed

10.

Hattab FN. Positional changes and eruption of impacted mandibular third molars in young adults. A radiographic 4-year follow-up study. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 1997;84(6):604–8. https://doi.org/10.1016/s1079-2104(97)90359-0.CrossRefPubMed

11.

Vranckx M, Ockerman A, Coucke W, Claerhout E, Grommen B, Miclotte A, Van Vlierberghe M, Politis C, Jacobs R. Radiographic prediction of mandibular third molar eruption and mandibular canal involvement based on angulation. Orthod Craniofac Res. 2019;22(2):118–23. https://doi.org/10.1111/ocr.12297.CrossRefPubMed

12.

Marciani RD. Third molar removal: an overview of indications, imaging, evaluation, and assessment of risk. Oral Maxillofac Surg Clin North Am. 2007;19(1):1–13.CrossRefPubMed

13.

Jakovljevic A, Lazic E, Soldatovic I, Nedeljkovic N, Andric M. Radiographic assessment of lower third molar eruption in different anteroposterior skeletal patterns and age-related groups. Angle Orthod. 2015;85(4):577–84. https://doi.org/10.2319/062714-463.1.CrossRefPubMed

14.

Ogawa T, Osato S. Growth changes of the mandibular body with eruption of mandibular third molars: analysis of anatomical morphometry and quantitative bone mineral content by using radiography. Ann Anat. 2013;195(2):143–50. https://doi.org/10.1016/j.aanat.2012.07.011.CrossRefPubMed

15.

Santos RMG, De Martino JM, Haiter Neto F, Passeri LA. Cone beam computed tomography-based cephalometric norms for Brazilian adults. Int J Oral Maxillofac Surg. 2018. https://doi.org/10.1016/j.ijom.2017.06.030.

16.

Peduzzi P, Concato J, Kemper E, Holford TR, Feinstein AR. A simulation study of the number of events per variable in logistic regression analysis. J Clin Epidemiol. 1996;49(12):1373–9. https://doi.org/10.1016/s0895-4356(96)00236-3.CrossRefPubMed

17.

Hsieh FY. Sample size tables for logistic regression. Stat Med. 1989;8(7):795–802. https://doi.org/10.1002/sim.4780080704.CrossRefPubMed

18.

McNamara JA Jr. A method of cephalometric evaluation. Am J Orthod. 1984. https://doi.org/10.1016/s0002-9416(84)90352-x.

19.

Rodriguez-Cardenas YA, Arriola-Guillen LE, Flores-Mir C. Björk-Jarabak cephalometric analysis on CBCT synthesized cephalograms with different dentofacial sagittal skeletal patterns. Dental Press J Orthod. 2014;19(6):46–53. https://doi.org/10.1590/2176-9451.19.6.046-053.oar.CrossRefPubMedPubMedCentral

20.

Naqvi ZA, Shivalinga BM, Ravi S, Munawwar SS. Effect of cleft lip palate repair on craniofacial growth. J Orthod Sci. 2015;4(3):59–64. https://doi.org/10.4103/2278-0203.160236.CrossRefPubMedPubMedCentral

21.

Zhang Y, Sun X, Wang L, Chen K, Wang X, Wu G. Simultaneous orthognathic surgery and mandibular contour Osteoplasty for treating mandibular protrusion with high Gonial angle. J Craniofac Surg. 2020;31(5):1362–6. https://doi.org/10.1097/SCS.0000000000006360.CrossRefPubMed

22.

De Bruyn L, Vranckx M, Jacobs R, Politis C. A retrospective cohort study on reasons to retain third molars. Int J Oral Maxillofac Surg. 2020;49(6):816–21. https://doi.org/10.1016/j.ijom.2019.10.003.CrossRefPubMed

23.

Olayemi AB. Assessment and determination of human mandibular and dental arch profiles in subjects with lower third molar impaction in Port Harcourt. Nigeria Ann Maxillofac Surg. 2011. https://doi.org/10.4103/2231-0746.92775.

24.

Uthman AT. Retromolar space analysis in relation to selected linear and angular measurements for an Iraqi sample. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2007;104(4):e76–82. https://doi.org/10.1016/j.tripleo.2007.05.013.CrossRefPubMed

25.

Aliaga-Del Castillo A, Janson G, Arriola-Guillén LE, Laranjeira V, Garib D. Effect of posterior space discrepancy and third molar angulation on anterior overbite. Am J Orthod Dentofac Orthop. 2018. https://doi.org/10.1016/j.ajodo.2017.12.014.

26.

Begtrup A, Grønastøð HÁ, Christensen IJ, Kjær I. Predicting lower third molar eruption on panoramic radiographs after cephalometric comparison of profile and panoramic radiographs. Eur J Orthod. 2013;35(4):460–6. https://doi.org/10.1093/ejo/cjs012.CrossRefPubMed

27.

Al-Gunaid TH, Bukhari AK, El Khateeb SM, Yamaki M. Relationship of mandibular ramus dimensions to lower third molar impaction. Eur J Dent. 2019. https://doi.org/10.1055/s-0039-1693922.

28.

Mayama H, Kuwajima Y, Da Silva JD, Khorashadi S, Lambert RF, Ishida Y, Ishikawa-Nagai S, Miura H, Satoh K. Cephalometric measurements of non-syndromic Oligodontia in early dental age in a Japanese population. Clin Cosmet Investig Dent. 2019. https://doi.org/10.2147/CCIDE.S213111.

29.

Sant’Ana LF, Giglio FP, Ferreira O Jr, Sant’ana E, Capelozza AL. Clinical evaluation of the effects of radiographic distortion on the position and classification of mandibular third molars. Dentomaxillofac Radiol. 2005;34(2):96–101. https://doi.org/10.1259/dmfr/29844316.CrossRefPubMed

30.

Peker I, Sarikir C, Alkurt MT, et al. Achados de radiografia panorâmica e tomografia computadorizada de feixe cônico no exame pré-operatório de terceiros molares inferiores impactados. BMC Saúde Oral. 2014;14:71. https://doi.org/10.1186/1472-6831-14-71.CrossRef

31.

Aoun Y, Husseini B, Younes R, Ghosn N, Bouserhal J. Assessment of lower third molar space: a comparative radiographic study. Dentomaxillofac Radiol. 2022;51(5):20220049. https://doi.org/10.1259/dmfr.20220049.CrossRefPubMedPubMedCentral

32.

Baqain ZH, AlHadidi A, AbuKaraky A, Khader Y. Does the use of cone-beam computed tomography before mandibular third molar surgery impact treatment planning? J Oral Maxillofac Surg. 2020. https://doi.org/10.1016/j.joms.2020.03.002.

33.

Freire BB, Nascimento EHL, Vasconcelos KF, Freitas QD, Haiter-Neto F. Radiologic assessment of mandibular third molars: an ex vivocomparative study of panoramic radiography, extraoral bitewing radiography, and cone beam CT. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2018. https://doi.org/10.1016/j.oooo.2018.11.002.

Title: Tomographic analysis of relationship of mandibular morphology and third molars eruption
Authors: Jéssica de Fátima Segantin
Gabriela Barbosa Bisson
Letícia Liana Chihara
Osny Ferreira Júnior
Publication date: 01-12-2023
Publisher: BioMed Central
Published in: BMC Oral Health / Issue 1/2023
Electronic ISSN: 1472-6831
DOI: https://doi.org/10.1186/s12903-023-03653-0

2024 ASCO Annual Meeting

Springer Medicine

Tomographic analysis of relationship of mandibular morphology and third molars eruption

Abstract

Background

Methods

Results

Conclusion

2024 ASCO Annual Meeting

Springer Medicine

Abstract

Background

Methods

Results

Conclusion

Please log in to get access to this content

Other articles of this Issue 1/2023

Evaluation of delphinidin as a storage medium for avulsed teeth

Three-dimensional printed titanium mesh combined with iliac cancellous bone in the reconstruction of mandibular defects secondary to ameloblastoma resection

Associations of adverse childhood experiences with caries and toothbrushing in adolescents. The Young-HUNT4 Survey

Oral manifestations of COVID-19 in unvaccinated patients: a cross-sectional study

Association between sleep duration and dental caries in a nationally representative U.S. population

Exploring the microbiome of oral epithelial dysplasia as a predictor of malignant progression