当前位置： SCI文献检索 > EUROPEAN JOURNAL OF ORTHODONTICS期刊下所有文献 > Change in alveolar bone level of mandibular second and third molars after second molar protraction into missing first molar or second premolar space.

Change in alveolar bone level of mandibular second and third molars after second molar protraction into missing first molar or second premolar space.

Abstract：

OBJECTIVE:To investigate the factors associated with the change in alveolar bone level of mandibular second and third molars after second molar protraction into the space of the missing first molar (L6) or second premolar (LE). METHODS:Fifty-one patients in whom space of the missing L6 or LE was treated with second molar protraction (13 males, 38 females, mean age 19.6 ± 4.7 years) from 2003 to 2015 were included. The alveolar bone level and position and angulation of the mandibular second and third molars were measured in panoramic radiographs at pre-treatment (T1), and after the alignment of the third molars following second molar protraction (T2). Factors associated with alveolar bone loss on the distal aspect of the mandibular second molars were assessed using linear regression analysis. RESULTS:Age at T1 (P < 0.001) and third molar angulation at T1 (P = 0.002) were significant factors for the prediction of alveolar bone level distal to the second molars. LIMITATION:This study used two-dimensional panoramic radiographs, and we could observe only the interproximal bone level. CONCLUSIONS:After second molar protraction into the missing first molar or second premolar space, mandibular second molars may exhibit alveolar bone resorption in the distal root in older patients and in those with mesially tilted third molars before treatment.

journal_name

Eur J Orthod

journal_title

European journal of orthodontics

authors

Baik UB,Choi HB,Kim YJ,Lee DY,Sugawara J,Nanda R

doi

10.1093/ejo/cjz001

subject

Has Abstract

pub_date

2019-09-21 00:00:00

pages

513-518

issue

5

eissn

0141-5387

issn

1460-2210

pii

5305945

journal_volume

41

pub_type

杂志文章

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