The Rare Eruption of Second Mandibular Permanent Molar in a Seven-Year-Old Girl: A Case Report

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.

The The eruption phase of second permanent molar in children aged 11-15 years in coastal area of pugerIndonesia

“…While permanent teeth eruption is under important genetic control, this process can be affected by numerous general factors such as sex, socioeconomic status, craniofacial morphology, body composition and metabolic disorders. [6] Delayed tooth eruption is a recorded consequence of childhood hypothyroidism, a disorder developed when the thyroid, a major regulator of metabolism, is underactive. [7] Conversely, earlier eruption of permanent teeth has been observed in overweight and obese children and those with diabetes mellitus.…”

“…[9] Delayed eruption is associated with local and systemic factors such as mucosal barriers-scar tissue including trauma, surgery, supernumerary teeth, injuries to primary teeth, ankyloses as local factors and nutrition: Vitamin Dresistant rickets, celiac disease, hypothyroidism (cretinism), hypopituitarism as systemic factors. [6] People living in the coastal areas of Puger usually have a low socioeconomic level due to the uncertainty of fishing. [10] Children raised in families with low socioeconomic levels tend to have slower eruption times than children with high socioeconomic levels.…”

“…The first permanent tooth that erupts in the oral cavity is the first permanent molar, which has a high risk of extraction due to caries. [6] Mandibular second molar normally erupts in girls from the age of 8 years and 11 months to 14 years and 4 months (mean 11.3 years).…”