X-線像에 依한 韓國人 上顎正中部 過剩齒에 關한 硏究

DENTAL RADIOGRAPHICAL STUDIES ON THE MESIODENS OF KOREAN

Authors reviewed 128 cases of mesiodens of 106 patients through dental standard periapical film. The main point of studies were focused on the sexual and age difference, condition of impaction, location, number, shape, width of mesiodens, depth of impaction, condition of eruption of mesiodens, and interrelation of median diastema to mesiodens. The following results were obtained: 1. Mesiodens were found dominantly in male(79 cases, 74.53%) than in female (27 cases, 25.47%) 2. Most frequent age group was 0~10 years of age(43 cases, 40.57%). 3. Most mesiodens were observed in the region of palatal midline suture 52 cases (40.63%) close to the root apices of upper central incisors. 4. One mesiodens was found in 82 cases(77.36%) while two mesiodens were in 24 cases(22.64%). 5. Normal shape of mesiodens was found in 92 cases(71 88%) and abnormal cases were in 36 cases(28.13%) 6. Most frequent width of mesiodens was median sized type(5.0-6.0mm). 7. Normal impaction was 68 cases(53.13%) while inverted cases were 48 cases (37.50%) 8. Impaction rate of mesiodens was(58.59% ) in 75 cases and its depth was 11.79mm in mean value. 9. 54 cases showed median diastema(50.94%) and width of diastema was 3.58mm in mean value.