Dental Agenesis
Enviado por ptomintt • 31 de Marzo de 2014 • 5.005 Palabras (21 Páginas) • 309 Visitas
Introduction
Various definitions are used to describe the phenomenon
of congenitally missing teeth: hypodontia,
oligodontia, anodontia, congenitally missing
teeth and dental agenesis. Anodontia stands for
patients with complete absence of teeth, oligodontia
for patients with the absence of six or more
teeth, apart from the third molars (1). The authors
prefer the term dental agenesis as it describes more
accurately the developmental disorder involved.
Large differences in the prevalence of dental
agenesis have been reported, varying from 0.3
(2) to 36.5% (3). The relationship between the
prevalence of missing teeth and dental consumption
seems obvious. The actual number of dental
agenesis in a community is therefore not only
interesting for dentists but also for public health
departments and health insurance companies. In
most studies the sample size is too small to reach
valid conclusions regarding the distribution of
agenetic teeth for gender and site. The data
presented in the literature have not been analyzed
by an integrated approach. The aim of this study is
to increase the insight in the prevalence of dental
agenesis and its implication for dental consumption
in communities by the method of metaanalysis
(4, 5). In addition, meta-analysis enables
Community Dent Oral Epidemiol 2004; 32: 217–26
All rights reserved
Copyright Blackwell Munksgaard 2004
A meta-analysis of the
prevalence of dental agenesis
of permanent teeth
Polder BJ, Van’t Hof MA, Van der Linden FPGM, Kuijpers-Jagtman AM.
A meta-analysis of the prevalence of dental agenesis of permanent teeth.
Community Dent Oral Epidemiol 2004; 32: 217–26. Blackwell Munksgaard,
2004
Abstract – Objective: To gain more insight into the prevalence of dental
agenesis. Methods: Data from Caucasian populations in North America,
Australia and Europe were included in a meta-analysis. For the prevalence of
African American, Chinese and Arab groups only indications could be reported
because of a limited number of studies. Results: Agenesis differs by continent
and gender: the prevalence for both sexes was higher in Europe (males 4.6%;
females 6.3%) and Australia (males 5.5%; females 7.6%) than for North
American Caucasians (males 3.2%; females 4.6%). In addition, the prevalence of
dental agenesis in females was 1.37 times higher than in males. The mandibular
second premolar was the most affected tooth, followed by the maxillary lateral
incisor and the maxillary second premolar. The occurrence of dental agenesis
was divided into three main groups: common (P2i > I2s > P2s), less common
(I1i > I2i & P1s > Cs & M2i) and rare (M2s & M1s > Ci > M1i & I1s). Unilateral
occurrence of dental agenesis is more common than bilateral occurrence.
However, bilateral agenesis of maxillary lateral incisors is more common than
unilateral agenesis. The overall prevalence of agenesis in the maxilla is
comparable with that in the mandible, but a marked difference was found
between both jaws regarding tooth type. Absence of one or two permanent
teeth is found in 83% of the subjects with dental agenesis. A practical
application of the results of the meta-analysis is the estimation of dental
treatment need.
Bart J. Polder1, Martin A. Van’t Hof2,
Frans P. G. M. Van der Linden1 and
Anne M. Kuijpers-Jagtman1
Departments of 1Orthodontics and Oral
Biology, and 2Cariology and Preventive
Dentistry, University Medical Centre,
Nijmegen, The Netherlands
Key words: dental agenesis; meta-analysis;
prevalence
Bart J. Polder DDS, Department of
Orthodontics and Oral Biology, University
Medical Centre Sint Radboud, PO Box 9101,
6500 HB Nijmegen, The Netherlands
Tel: +31 243 614 005
Fax: +31 243 540 631
e-mail: orthodontics@dent.umcn.nl
Submitted 13 May 2002;
accepted 5 November 2003
217
the study of determinants such as gender, site and
race for the prevalence and more reliable predictions
of dental consumption because of the number
of teeth to be replaced.
Materials
...