Birth Weight and Congenital Absence of Teeth in Twins

1971 ◽  
Vol 20 (1) ◽  
pp. 23-42 ◽  
Author(s):  
Harris J. Keene
Keyword(s):  
Birth Weight ◽  
Low Birth Weight ◽  
Third Molar ◽  
Third Molars ◽  
Missing Teeth ◽  
Anatomic Location ◽  
Tooth Number ◽  
Congenitally Missing Teeth ◽  
Anatomic Distribution ◽  
Congenitally Missing

SummaryThe relationship between hypodontia and birth weight was investigated in 262 twins from the naval recruit population at Great Lakes. The overall frequency of hypodontia including third molars was 34.8%. Excluding third molars, hypodontia frequency was 11.6%. Anatomic distribution of congenitally missing teeth and frequency of third molar hypodontia were similar to other studies, but hypodontia of teeth other than third molars occurred two-three times as frequently in twins as in the general population.The frequency of low birth weight (2500 g or less) in the twin sample was 47.7%. Hypodontia occurred more frequently in twins with low birth weight (42.6%) than in twins with birth weights over 2500 g (28.6%). Mean birth weight of twins with hypodontia was 2479 g, and without hypodontia, 2675 g. Twins with missing teeth other than third molars had a mean birth weight of 2357 g.Mean birth weight was lower and hypodontia frequency was higher in MZ than in DZ twins. Discordances in anatomic location and number of missing teeth occurred in several MZ and DZ twin pairs. Discordances within MZ sets tended to be related to anatomic location rather than number of missing teeth. Six twin pairs (5 MZ and 1 DZ) out of 20 (13 MZ and 7 DZ) having one or more missing teeth had perfect concordance in both number and location of missing teeth. In 28 pairs neither member had hypodontia.Mean intrapair variance in number of congenitally missing teeth was almost ten times greater in DZ than in MZ pairs, indicating the presence of a strong genetic component in connection with tooth number variability in twins.

scholarly journals HYPODONTIA WITH CLASS I MALLOCLUSION AND MAXILLARY DIASTEMA

2018 ◽  
Vol 1 (2) ◽  
pp. 98
Author(s):  
Bunga Fatimah ◽  
I Gusti Aju Wahju Ardani
Keyword(s):  
Case Management ◽  
Class I ◽  
Tooth Agenesis ◽  
Third Molars ◽  
Missing Teeth ◽  
Facial Aesthetics ◽  
The Third ◽  
Congenitally Missing Teeth ◽  
Congenitally Missing ◽  
Severe Type

Background: Dental agenesis is a term that refers to the absence of one or more teeth, and hypodontia refers to a severe type of tooth agenesis involving less than six or more than one congenitally missing teeth, excluding the third molars. Purpose: This aimed to report the correction of overbite by using intrusion archwires. Case: A 20-year-old female patient had class I malocclusion and deep overbite, incisor retroclination, mild mandibular crowding and agenesis of 12, 13, 14, 15, and 24. Case management: The case was treated with non-extraction using 0.022 pre-adjusted technique to level and unravel using intrusion archwires to correct the deep overbite. Conclusion: The 17-month treatment resulted in a corrected overbite, good occlusion, and good facial aesthetics.

scholarly journals Assessment of hypodontia in the Turkish patients referring to the orthodontic clinic: A retrospective study

2013 ◽  
Vol 07 (S 01) ◽  
pp. S009-S014 ◽  
Author(s):  
Deniz Uzuner ◽  
Meltem Melik Celik ◽  
Ebubekir Toy ◽  
Candan Okay Turkdonmez
Keyword(s):  
Retrospective Study ◽  
Permanent Teeth ◽  
Third Molars ◽  
Missing Teeth ◽  
Study Results ◽  
Dental Hospital ◽  
Congenitally Missing Teeth ◽  
Pre Treatment ◽  
Turkish Patients ◽  
Congenitally Missing

ABSTRACT Objective: The aim of this retrospective study was to assess the prevalence and distribution of hypodontia in the permanent dentition in a sample of Turkish patients who referred to the Ankara Dental Hospital for orthodontic treatment. Materials and Methods: The pre-treatment orthodontic records of 2530 patients, 1382 girls (54.62%) and 1148 boys (45.38%) between the chronological ages of 7 and 16 years, were examined for evidence of hypodontia. The third molars were excluded in this study. Results: The prevalence of hypodontia in the inspected population was 5% (3.05% for girls, 1.95% for boys). The average number of the congenitally missing teeth per patient was 2.03 (1.08 for girls, 0.95 for boys). The prevalence of the congenitally missing permanent teeth was 34% for the upper laterals, 30% for the lower second premolars, 12.5% for the upper second premolars and 23.5% for the other teeth. Most patients with hypodontia (84.9%) (57.13% for girls, 27.77% for boys) had got missing either one tooth (45.23%) or two teeth (39.67%). Conclusions: The prevalence of hypodontia in girls was higher than in boys in this sample of the Turkish patients. The upper laterals and lower second premolars were consecutively the most symmetrically absent teeth. The prevalence of advanced hypodontia was lower than single and symmetrical hypodontia.

Dental Findings in Parents of Children with Cleft Lip and Palate

1996 ◽  
Vol 33 (5) ◽  
pp. 436-439 ◽  
Author(s):  
Peter J. Anderson ◽  
Anthony L.H., Moss
Keyword(s):  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Normal Population ◽  
Permanent Teeth ◽  
Dental Anomalies ◽  
Facial Skeleton ◽  
Missing Teeth ◽  
Congenitally Missing Teeth ◽  
Congenitally Missing

The incidence of dental abnormalities in the cleft lip and palate population has been reported to be much higher than in the normal population. The role of genes in the production of a cleft lip and palate, and dental anomalies is thought to be complex, with autosomal dominant, recessive, and x-linked genes all playing a role. Noncleft parents can carry some of the cleft lip and palate genes, which produce clinically subtle manifestations in their facial skeleton. The purpose of this study was to look for evidence of increased dental anomalies in the non-cleft parents of cleft lip and palate children. The dentitions of the parents of 60 children with different types of cleft lip and palate were examined prospectively to see whether or not they exhibited features found more readily in the cleft lip and palate rather than did the normal population. Their dentitions were studied to record the following dental features: congenitally missing teeth, supernumerary teeth, or morphologic changes of the crowns of the permanent teeth. The number and position of any frenal attachments were also recorded. The results of this study did not show any differences in incidence of dental anomalies from the noncleft population. There was no evidence to support the hypothesis that congenital absence of lateral incisors is a microform of cleft lip and palate. Further, these results also failed to reveal any consistent pattern in the number and position of frenal attachments.

scholarly journals Pre-Eruptive Coronal Resorption and Congenitally Missing Teeth in a Patient with Amelogenesis Imperfecta: A Case Report

2009 ◽  
Vol 03 (02) ◽  
pp. 140-144
Author(s):  
Ozkan Miloglu ◽  
Osman Fatih Karaalioglu ◽  
Fatma Caglayan ◽  
Zeynep Duymus Yesil
Keyword(s):  
Autosomal Recessive ◽  
Autosomal Dominant ◽  
The Other ◽  
Amelogenesis Imperfecta ◽  
Clinical Report ◽  
Missing Teeth ◽  
Second Molar ◽  
Molar Teeth ◽  
Congenitally Missing Teeth ◽  
Congenitally Missing

ABSTRACTThis clinical report describes a male with autosomal recessive generalized hypoplastic amelogenesis imperfecta. This case is unusual in coronal resorptions prior to tooth eruption. This finding has been reported in some cases of autosomal recessive, autosomal dominant and X linked amelogenesis imperfecta (AI). In reported cases, the defects were usually small and occurred in a maximum of 2 teeth per person. In our case, pre-eruptive coronal resorptions affected three second molar teeth from both jaws. On the other hand; congenitally missing teeth and malocclusion were present in this case. Recall evaluations at 3 month intervals occurred for a period of 2 years and then prosthodontic management began. (Eur J Dent 2009;3:140-144)

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