Concomitant hypo-hyperdontia with an endocrine etiology

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Abstract

The simultaneous occurrence of hypodontia and supernumerary teeth in the same individual is termed as “concomitant hypohyperdontia” and it is an uncommon condition with the etiology still unknown. Presented here is a very rare case of simultaneous presence of multiple supernumerary teeth and multiple missing teeth (bilateral maxillary second premolars and bilateral mandibular second molars) involving both jaws with a history of subclinical hypothyroidism. Systemic diseases could probably play a role in the etiologic occurrence of co-existent partial anodontia and supernumerary teeth.

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Supernumerary teeth: review of the literature and a survey of 152 cases.

L D Rajab, Ahmad M. Hamdan (2002)

A review of the literature relating to supernumerary teeth is presented along with a survey of 152 cases. The study population consisted of 152 children who visited the department of Paediatric Dentistry at the Jordan University Hospital. Patients ranged in age from 5 to 15 years. Supernumeraries were detected by clinical examination and radiographs. Males were affected more than females with a sex ratio of 2.2 : 1. Seventy-seven percent of the patients had one supernumerary tooth, 18.4% had double teeth, and 4.6% had three or more supernumeraries. Ninety percent of the supernumerary teeth occurred in the premaxilla, of which 92.8% were in the central incisor region and of these latter 25% were located in the midline. The other 10.4% of the supernumeraries were located in the premolar, canine, molar, and lower central incisor regions. Two cases were of non-syndrome supernumerary teeth. Seventy-five percent of the supernumeraries were conical, 83.1% were in the normal vertical position and 26.5% were erupted. Conical-shaped supernumerary teeth had a significantly higher rate of eruption compared to the tuberculate type.

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The long-term survival of lower second primary molars in subjects with agenesis of the premolars.

K Bjerklin, Thomas Bennett (2000)

This study investigated 41 subjects, 13 male and 28 female, with agenesis of one or both lower second premolars, and with retained lower second primary molars. Intra-oral radiographs of 59 primary teeth were examined to judge the resorption of the mesial and distal roots, and were measured to record infra-occlusion of the primary teeth and tipping of the adjacent permanent teeth. The study commenced at 11-12 years of age. The mean age at the last measurement was 20 years 6 months (SD 3.62, range 13.6-31.8 years). During the observation period, only two of the 59 primary teeth were exfoliated. Five were extracted, two of which were replaced by upper third molar transplants. Beyond the age of 20 years no teeth were lost. Root resorption varied widely between individuals, but was slow. There was no typical pattern for development of infra-occlusion. Mean infra-occlusion was 0.47 mm (SD 1.13) at 11-12 years, increasing by less than 1.0 to 1.43 mm (SD 1.13) at age 17-18 years. At age 19-20 years, 55 per cent of teeth showed infra-occlusion between 0.5 and 4.5 mm, but 45 per cent showed no infra-occlusion. The space between the first molar and first premolar was a mean of 10.35 mm (SD 0.76) at age 10-12 years compared with the mean width of the second primary molar of 10.53 mm (SD 0.51). The space reduced by less than 0.5 mm to 9.95 mm (SD 1.50) at age 17-18 years. If primary molars are present at 20 years of age they appear to have a good prognosis for long-term survival.

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Patterns of tooth agenesis in patients with Down syndrome in relation to hypothyroidism and congenital heart disease: an aid for treatment planning.

Wimke Reuland-Bosma, Merijn Reuland, Ewald Bronkhorst … (2010)

The purposes of this study were to investigate the patterns of tooth agenesis (oligodontia and nonoligodontia), maxillary canine impaction, and tooth transposition in subjects with Down syndrome and to determine whether congenital heart disease and hypothyroidism are parameters in tooth agenesis. The study included 114 patients with Down syndrome. The data were quantified by using standardized records, clinical examinations, panoramic radiographs, and solo roentgenograms. The subjects were differentiated into oligodontia (6 or more teeth missing) and nonoligodontia (5 or fewer teeth missing). In these patients with Down syndrome, 59.6% had missing teeth. Those in the nonoligodontia group showed a tendency toward a negative correlation between congenital heart disease and agenesis (P = 0.093; odds ratio = 0.49) but a slight positive correlation between hypothyroidism and agenesis (P = 0.060; odds ratio = 3.71). In the oligodontia group, there was a quantitatively and qualitatively different pattern, indicating another phenotype. When both mandibular central incisors were missing, there was a remarkable chance for oligodontia (P = 0.001; odds ratio = 38.8). In the mandible, symmetrical agenesis of the canines and lateral incisors was more frequent in the nonoligodontia group. The oligodontia (with a different phenotype) and nonoligodontia groups had different patterns of agenesis. Maxillary canine impaction was not related to absence of the lateral incisors. Absence of both mandibular central incisors was a high predictor for oligodontia. Congenital heart disease and hypothyroidism are parameters involved in tooth agenesis. Copyright (c) 2010 American Association of Orthodontists. Published by Mosby, Inc. All rights reserved.

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Journal

Journal ID (nlm-ta): Natl J Maxillofac Surg

Journal ID (iso-abbrev): Natl J Maxillofac Surg

Journal ID (publisher-id): NJMS

Title: National Journal of Maxillofacial Surgery

Publisher: Medknow Publications & Media Pvt Ltd (India )

ISSN (Print): 0975-5950

ISSN (Electronic): 2229-3418

Publication date (Print): Jan-Jun 2014

Volume: 5

Issue: 1

Pages: 51-53

Affiliations

[1]Department of Paediatric Dentitsry, Meenakshi Ammal Dental College, Chennai, India

Author notes

Address for correspondence: Dr. Sharmila Surendran, Penang International Dental College, NB Tower, Butterworth,12000, Penang, Malaysia. E-mail: drsharmee@ 123456gmail.com

Article

Publisher ID: NJMS-5-51

DOI: 10.4103/0975-5950.140174

PMC ID: 4178357

SO-VID: 18493c5c-c4cf-4ed8-ae48-6c31fcb37cfe

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This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Concomitant hypo-hyperdontia with an endocrine etiology

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Most cited references 9

Supernumerary teeth: review of the literature and a survey of 152 cases.

The long-term survival of lower second primary molars in subjects with agenesis of the premolars.

Patterns of tooth agenesis in patients with Down syndrome in relation to hypothyroidism and congenital heart disease: an aid for treatment planning.

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