Congenitally Missing Mandibular Second Premolars: A Case Report
Developmental alterations in the number of teeth that develop are common. Hypodontia denotes the lack of development of one or more teeth, oligodontia refers to six or more missing
teeth, and anodontia to the complete absence of teeth.
Hypodontia is common in permanent dentition as compared to primary dentition.
According to Graber, the overall frequency of patients with congenitally missing
teeth excluding the third molars has ranged from 1.6-9.6% in various
studies in different countries.
Although any of the 32 permanent teeth may be missing but those most frequently
missing in children are the mandibular second premolars, maxillary lateral incisors, and maxillary second premolars as confirmed in studies by Glenn and Grahnen.
Females are more often affected as compared to males with a predominance of
There is a close correlation between congenitally missing deciduous teeth and their permanent
successors according to the study of Grahnen and Granath.
The presence of hypodontia
may be associated with other dental anomalies such as small and short crowns and roots of the
teeth that are present, conical crown shape, enamel hypoplasia, taurodontism, delayed eruption, prolonged eruption of primary teeth, infraocclusion of primary teeth, ectopic eruption,
transposition, lack of alveolar bone, reduced vertical dimensions, increased overbite, and tooth
impaction.
Dent Open J. 2016; 3(1): 1-3. doi: 10.17140/DOJ-3-127