Hyperdontia

Abstract: Most supernumerary teeth are located in the anterior maxillary region. They are classified according to their form and location. Their presence may give rise to a variety of clinical problems. Detection of supernumerary teeth is best achieved by thorough clinical and radiographic examination. Their management should form part of a comprehensive treatment plan. This article presents an overview of the clinical problems associated with supernumerary teeth and includes a discussion of the classification, diagnosis and management of this difficult clinical entity.

Abstract: The purpose of this paper was to present various guidelines in the diagnostic assessment and surgical management of anterior supernumerary teeth in chiMren. Early detection and prudent management of these teeth was considered essentiai in reducing disturbances in the eruption and position of the adjacent permanent incisors. It was recormnended that immediate surgical removal be performed unless the supernumerary tooth was diagnosed as a non-inverted conical type or placed above the apices of the adjacent permanent teeth. If sufficient arch space was provided but the permanent incisor failed to erupt on its own accord, surgical exposure was then indicated for the unerupted crown. I~nally, orthodontic traction was recommended only if spontaneous eruption did not occur within a short period of observation following crown exposure.

Abstract: Summary.Objectives. To establish the prevalence of numerical and morphological variations of permanent teeth in Swedish 7-year-olds and to accept or reject the hypothesis of a higher prevalence for these conditions in northern Sweden compared to other areas. Design. Cross-sectional. Setting. Department of Odontology/Pedodontics, Umea University, Sweden. Sample and methods. A total of 739 healthy Caucasian 7-year-olds residing in the city of Umea, northern Sweden in 1976. The children were examined clinically and radiographically. Results. The prevalence of hypodontia (excluding third molars) in girls was 8·4%, in boys 6·5%, and in both sexes combined 7·4%. Of the children with hypodontia, the majority (90·9%) lacked one or two teeth. Lower second premolars were the teeth most frequently missing. The prevalence of hyperdontia was 1·9%; 11 girls and three boys were affected; 78% of the supernumerary teeth were mesiodenses. Of the morphological variations, peg-shaped upper lateral incisors were found in 0·8% of the children, double-formation (gemination) in 0·3%, taurodontism in 0·3% and dens invaginatus in 6·8%. One diagnosis was found in 18% of the children, and in almost 8% of them more than one diagnosis was found. Conclusions. The results agree with those obtained in similar populations and are considered representative of this ethnic group. The hypothesis of a genetically determined higher prevalence of numerical and morphological variations in the study population was not verified.