Survey on hypodontia in Sayada, Tunisia
Fethi Maatouk1, Ahlem Baaziz, Senda Ghnima
1Dentistry Department, Monastir Dental School, Tunisia. fethi.maatouk@fmdm.rnu.tn
Objective:
To determine dental agenesis prevalence in Sayada, Tunisia, a town from where many patients attend the Pediatric Department of Monastir University Dental School for such abnormalities, and to analyze its mode of inheritance.
Method And Materials:
A total of 262 schoolchildren in permanent dentition (134 females and 128 males) aged 12 to 18 years (mean, 14.1 +/- 1.2 years) were examined to detect dental agenesis. In the case of a missing permanent tooth, a panoramic radiograph was taken to confirm diagnosis. A family survey questionnaire was completed for each case of multiple agenesis (at least 4 teeth missing).
Results:
Findings revealed a dental agenesis prevalence of 13.3%. Altogether, 62 teeth were missing. No case of syndromal agenesis was detected; however, 12 children presented multiple agenesis (34.3%). The family survey was completed for only 9 of these subjects.
Conclusion:
Literature review showed a lower dental agenesis prevalence (3% to 7%) than did the present study. In the present study, females were more affected by this abnormality than males (16.4% and 10.3%, respectively). With the exception of third molars, the tooth most often missing was the mandibular second premolar (30.6%), followed by the maxillary second premolar (17.7%); hypodontia seemed to be symmetrical. Family surveys revealed a high rate of consanguinity in Sayada. Pedigree analysis of 9 families showed that dental agenesis was probably related to an autosomal dominant inheritance.
Related Concept Videos
Assessment of the Mouth
Mouth Inspection
The inspection begins with visually examining the mouth for symmetry, color, and size.
Tooth Anatomy
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or grinding food.
Teeth
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin and...
Surveys
Oral Cavity
Teeth: The teeth are the hardest structures in our bodies. Humans have two sets of teeth throughout their lifetime: deciduous (baby) teeth and permanent teeth. Each tooth consists of several parts: the crown (visible part), the root (embedded in the jaw), enamel (hard outer...
Types of Surveys
