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Age-related changes in the location of the mandibular and mental foramen in children with Mongoloid skeletal pattern

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Abstract

Aim

To observe age-related changes in the locations of mandibular foramen (MF) and mental foramen (mf) using dental panoramic tomographs (DPTs).

Methods

Ethical approval was obtained for this retrospective study. Location of MF was related to the ramus and occlusal plane, while mf to (i) erupted primary molars (ii) unerupted premolar tooth germs (iii) vertical height at the body of the mandible.

Results

One hundred and sixty-five DPTs were obtained from children with Mongoloid skeletal pattern. The ethnic composition was 112 Malays and 53 Chinese children (Willems dental age = 5.2–16.0 years). At the horizontal plane, MF remained constant at middle mid-quadrant of the ramus (88 %) and vertical plane; 68 % located below and 40 % above the occlusal plane. At age 9 years and above, there was a significant tendency for MF to be located at the level of occlusal plane. The most common location of mf was related to (i) erupted primary molars, mesial root of second primary molar (38 %); (ii) unerupted premolars tooth germs, between the apices of first and second premolar (44 %); and (iii) proportional vertical height to the mandible, middle third (52 %). At age 11 years and above, a significant tendency of mf to be located at the middle third of the body of mandible was observed.

Conclusions

With advancing age and growth, the position of MF remained constant at the ramus with tendency to move from below to at the level of occlusal plane, while mf moved distally and inferiorly.

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Acknowledgments

This research was supported by UM.C/625/1/HIR/MOHE/DENT/05 grant from University of Malaya, Malaysia.

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Authors and Affiliations

  1. Department of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia

    M. Y. Lim & W. W. Lim

  2. Melbourne Dental School, University of Melbourne, 720, Swanston Street, Victoria, 3010, Australia

    S. Rajan

  3. Department of Diagnostic and Integrated Dental Practice, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia

    P. Nambiar

  4. Department of Oral Maxillofacial Surgery, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia

    W. C. Ngeow

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  1. M. Y. Lim
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Correspondence to S. Rajan.

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Lim, M.Y., Lim, W.W., Rajan, S. et al. Age-related changes in the location of the mandibular and mental foramen in children with Mongoloid skeletal pattern. Eur Arch Paediatr Dent 16, 397–407 (2015). https://doi.org/10.1007/s40368-015-0184-x

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