Abstract
Background: Information on tooth emergence is a key indicator for demonstrating maturity in the diagnosis of certain growth disturbances and an estimation of the chronological age of the children with unknown birth records in forensic dentistry. The association of dental and skeletal maturity with chronologic age among different populations has been investigated by several researchers. Early eruption of permanent molar appears to be a unique finding at such an early chronological age. The present report aimed to present a case of early eruption of mandibular second permanent molar in a seven-year-old girl. Case Report: A seven-year-old girl was referred to the department of pediatric dentistry of Hamadan University with the chief complaint of an extra palatal tooth. Apart from the supernumerary tooth, mandibular second molars and premolars were fully erupted. Radiographic evaluation revealed a closure of the apex of the maxillary and mandibular incisors along with the first molars. For further investigations, the patient was referred to pediatric endocrinologist in order to rule out any systemic disease; however, patient’s test results did not show any systemic or hormonal problems. This case is one of the rare cases of early eruption of mandibular second molars at seven with no underlying problems. To our knowledge, no case of early eruption of second permanent molar has been reported in a seven-year-old child and early eruption of second molar appears to be a unique finding at such an early chronological age. Conclusions: Any change in sequence or timing of the normal tooth eruption is not common, and it needs prepared eyes and adequate knowledge to diagnose and examine it in a timely manner.
Highlights
Information on tooth emergence is a key indicator for demonstrating maturity in the diagnosis of certain growth disturbances and an estimation of the chronological age of the children with unknown birth records in forensic dentistry
Tooth eruption is generally a series of alveolar bone metabolic changes controlled by the adjacent parts of the dental follicle [5]
The protein associated with the parathyroid hormone (PTH) has an imperative role in developing the eruption pathway [6]
Summary
Tooth eruption is a natural physiological mechanism by which the teeth sequentially cut through the gingiva into the oral cavity. Chronological age can be correctly calculated by developmental stages, skeletal maturation, secondary sexual characteristics, and dental development. A supernumerary tooth was located palatally between the left lateral incisor and primary canine teeth in the maxilla. She had Class I occlusal pattern which was seen by intraoral inspection (Figure 2A). Dental maturation of permanent teeth showed marked progression in all teeth and a panoramic radiograph was initially recommended to validate the clinical diagnosis. NOLLA’s developmental stages 8 (2/3 of the root completed) of root development in mandibular second molars were detected in panoramic view (Figure 3). The decision for publishing patient data was taken after receiving an informed consent from her parents
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