IADR Abstract Archives
Shovel-shaped Incisor Trait on Upper Central Incisor among Viet Ethnics
Objectives: The aims of this study were to determine the frequencies of shovel–shaped incisor trait, and to compare shovel–shaped incisor trait between ethnics as Viet, Raglai, Katu, Êđê, Cơho among 12 to 14 year-old in Vietnam.
Methods: This cross-sectional study was conducted in year 2011. 64 pairs of dental casts were collected from 64 children from 12 to 14 ages (32 boys, 32 girls,) who have been participated in the research project of “Project to evaluate the craniofacial and dental development of Vietnamese children from 3 to 18 years-old” since year 1996. Number pairs of dental casts among children in Viet, Raglai, Katu, Êđê and and Cơho were 64, 430, 200, 134, 150, respectively. Shovel–shaped incisor trait were evaluated and classified basing on the dental casts by using Hanihara method (1963). Chi-Square test was applied in the study.
Results: The frequency of 2nd form (50%) and 3rd form (23.44%) of shovel–shaped incisors was highest (73.44%). The percentage of children with shovel–shaped incisors was 73.44%, 57.20%, 91.50%, 39.55%, 27.33% in Viet, Raglai, Katu, Êđê and Cơho, respectively. There were significant differences in frequencies of shovel –shaped incisor trait between the ethnics (p < 0.001).
Conclusions: In Viet, Raglai, Katu, Êđê, Cơho ethnics, we can observe different level of shovel – shaped incisor trait. Different ethnics showed that their frequencies regarding the shovel–shaped incisor trait were not the same.
Methods: This cross-sectional study was conducted in year 2011. 64 pairs of dental casts were collected from 64 children from 12 to 14 ages (32 boys, 32 girls,) who have been participated in the research project of “Project to evaluate the craniofacial and dental development of Vietnamese children from 3 to 18 years-old” since year 1996. Number pairs of dental casts among children in Viet, Raglai, Katu, Êđê and and Cơho were 64, 430, 200, 134, 150, respectively. Shovel–shaped incisor trait were evaluated and classified basing on the dental casts by using Hanihara method (1963). Chi-Square test was applied in the study.
Results: The frequency of 2nd form (50%) and 3rd form (23.44%) of shovel–shaped incisors was highest (73.44%). The percentage of children with shovel–shaped incisors was 73.44%, 57.20%, 91.50%, 39.55%, 27.33% in Viet, Raglai, Katu, Êđê and Cơho, respectively. There were significant differences in frequencies of shovel –shaped incisor trait between the ethnics (p < 0.001).
Conclusions: In Viet, Raglai, Katu, Êđê, Cơho ethnics, we can observe different level of shovel – shaped incisor trait. Different ethnics showed that their frequencies regarding the shovel–shaped incisor trait were not the same.