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The most common polymorphism seen in the maxillary and mandibular teeth emergence sequence is the eruption of P2-C instead of C-P2 and I1-M1 instead of M1-I1 respectively.

The review of literature showed that there are 9 different types of polymorphisms relating to the eruption of teeth.

The aim of the present study was to estimate the sequence of tooth eruption in children of the Dakshina Kannada region of Southern India and establish/determine the polymorphism in the eruption sequence.

The first tooth to erupt in the entire dentition was the mandibular first molar (LM1), and the last tooth to erupt was the maxillary second molar (UM2).

Further, polymorphisms were observed more frequently in the sequence of emergence of mandibular teeth as compared to maxillary teeth.

The status of the eruption of permanent teeth can also be used as a tool in forensic dentistry.

The popularly used developmental chart given by Schour and Massler (sample population not discernible from their publication) gives the general favourable sequence of emergence for permanent dentition as M1, I1, I2, P1, P2, C, M2 and M3 for the permanent maxillary teeth, and M1, I1, I2, C, P1, P2, M2, and M3 for the mandibular permanent teeth (Ash 1996).The median age of emergence of a tooth was calculated as the 50% probability of the tooth being present as per the Probit analysis. The present study had a cohort of 2536 subjects (1223 females and 1313 males) who were evaluated for the presence of emerged teeth.Probit regression analysis was performed with the age rounded to the nearest whole number.The sample population assessed for this cross-sectional study was from 2536 students (1223 females and 1313 males) aged 4–16 years, attending schools in Dakshina Kannada District, Karnataka, India, that are being provided with community dental care by our dental institution.The study was conducted after obtaining due consent and ethical clearance.Table 3 shows the consolidated list of polymorphisms that exist in the maxilla and the mandible.


  1. On 4 March 1899, for the match against Wales, Mc Ateer included four Irish players based in England.

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