IADR Abstract Archives
Occlusal-polygon Area and Carabelli-cusp: Dental Anthropology Characterization
Objectives: The relationship between the Occlusal-polygon Area (OPA) and the Carabelli-cusp (CC) contributes to the anthropological and forensic analysis (human identification process) of sexual dimorphism, bilateral asymmetry and biological relationship, to understand the historical and biological processes that have resulted in the ethnic variation pattern of humanity with respect to its geographical distribution. To determine the relationship between OPA and the CC in the second upper deciduous molars and first upper permanent molars of 10 Colombian ethnic groups.
Methods: This is a cross-sectional descriptive observational study that determined the average of OPA and the frequency and variability of CC of the second upper deciduous molars and first upper permanent molars in 610 maxillary casts (340 female and 270 male), of 10 Colombian ethnic groups (Figure 1-3). The OPA and CC data were processed in the SPSS 21® Software using parametric and non-parametric statistical tests. P<0.05 was considered statistically significant.
Results: OPA was higher in ticuna indigenous and lower in Chocó afro-descendants. For the CC, pit and cusp expressions were grouped, grades 1-4 being more frequent than grades 5-7, according to ASUDAS. When comparing the pit or cusp expression of the CC with the OPA, no significant differences were found. The APO and the expression of CC no was sexual dimorphism and bilateral asymmetry for second upper deciduous molars and first upper permanent molars.
Conclusions: The average of OPA allowed the association of the ethnic groups according to the mixed level, being considered as mesodonts with a tendency to microdontia –higher level of mixed ethnic– the mestizos and Afro-descendants of Cali and the nasa and misak indigenous; while the embera and ticuna indigenous –the lowest level of mixed ethnic– were considered mesodonts with a tendency to macrodontia. The pit expressions of the CC were more prevalent than the cusp expressions. Expression of CC did not influence the OPA averages. OPA and CC no was sexual dimorphism and bilateral asymmetry. OPA and CC can contribute to the estimation of the ethnic pattern in the human identification process.
Methods: This is a cross-sectional descriptive observational study that determined the average of OPA and the frequency and variability of CC of the second upper deciduous molars and first upper permanent molars in 610 maxillary casts (340 female and 270 male), of 10 Colombian ethnic groups (Figure 1-3). The OPA and CC data were processed in the SPSS 21® Software using parametric and non-parametric statistical tests. P<0.05 was considered statistically significant.
Results: OPA was higher in ticuna indigenous and lower in Chocó afro-descendants. For the CC, pit and cusp expressions were grouped, grades 1-4 being more frequent than grades 5-7, according to ASUDAS. When comparing the pit or cusp expression of the CC with the OPA, no significant differences were found. The APO and the expression of CC no was sexual dimorphism and bilateral asymmetry for second upper deciduous molars and first upper permanent molars.
Conclusions: The average of OPA allowed the association of the ethnic groups according to the mixed level, being considered as mesodonts with a tendency to microdontia –higher level of mixed ethnic– the mestizos and Afro-descendants of Cali and the nasa and misak indigenous; while the embera and ticuna indigenous –the lowest level of mixed ethnic– were considered mesodonts with a tendency to macrodontia. The pit expressions of the CC were more prevalent than the cusp expressions. Expression of CC did not influence the OPA averages. OPA and CC no was sexual dimorphism and bilateral asymmetry. OPA and CC can contribute to the estimation of the ethnic pattern in the human identification process.
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