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Effects of facial tooth movement on the periodontium in rats: a comparison between conventional and low force
Author(s) -
Danz Jan C.,
Bibby Bo M.,
Katsaros Christos,
Stavropoulos Andreas
Publication year - 2016
Publication title -
journal of clinical periodontology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.456
H-Index - 151
eISSN - 1600-051X
pISSN - 0303-6979
DOI - 10.1111/jcpe.12505
Subject(s) - dental alveolus , periodontium , dentistry , molar , medicine , orthodontics , periodontal fiber , gingival recession , apposition , anatomy
Abstract Background Bone dehiscences and gingival recession have been associated with orthodontic arch expansion. The aim of this study was to assess and compare periodontal modelling during application of two force levels. Methods The second and third upper molars were orthodontically moved buccally with conventional or low forces for 60 or 90 days in 32 rats. Ten non‐treated animals were used as controls. The influence of force level and time on dental, skeletal and periodontal parameters (i.e. height and thickness of gingiva and bone) was assessed on histomicrographs using a mixed linear model. Results Facial tooth position (725 μ m, CI 379 – 1072 μ m, distal root of the third molar) and maxillary skeletal width (295 μ m, CI 168–421 μ m) differed significantly between force groups. Despite bone apposition at the facial aspects of the moved roots, bone dehiscences were developing and bone thickness was decreasing during facial tooth movement. Development of gingival recession was scarce and in cases with extreme facial tooth movement. No remarkable differences between force levels were found for any of the periodontal parameters. Conclusions Facial tooth movement with conventional or low forces resulted in similar modelling of facial alveolar bone and gingiva.