|
KMID : 0358920160430030284
|
|
Journal of the Korean Academy of Pedodontics
2016 Volume.43 No. 3 p.284 ~ p.291
|
|
|
Predictive Factors of Ectopic Eruption of the Maxillary First Permanent Molar
|
|
Sun Ji-Min
Nam Ok-Hyung
Kim Mi-Sun
Lee Hyo-Seol
Choi Sung-Chul
|
|
|
Abstract
|
|
|
|
In order to provide a diagnostic basis for predicting the possibility of the self-correction of ectopic first permanent molars, differences among normal eruption, reversible and irreversible ectopic eruption of maxillary first permanent molars were retrospectively analyzed. The angles of the long axes and the occlusal lines between the maxillary first permanent molar and the adjacent tooth were measured by panoramic radiographs. The occlusal relationship of second primary molars was also investigated. There is a statistically significant difference between the ectopic eruption group and normal group (p < 0.05), but not between the reversible and irreversible ectopic eruption groups (p > 0.05). The angles between the second primary molar and the first permanent molar, the second primary molar and the second permanent molar in ectopic groups showed a smaller degree than those of the control group. Mesial step was found more frequently in the ectopic eruption group than the normal group. In conclusion, the angulation of the first permanent molar and tooth germ of the maxillary second permanent molar showed close relation with ectopic eruption of the maxillary first permanent molar and ectopic first permanent molar is likely to occur in class Ⅲ patients with maxillary deficiency.
|
|
|
KEYWORD
|
|
|
First permanent molar, Irreversible ectopic eruption, Reversible ectopic eruption
|
|
|
FullTexts / Linksout information
|
|
 
|
|
|
Listed journal information
|
|
|