Morphologic and hemodynamic analysis of dental pulp in dogs after molar intrusion with the skeletal anchorage system

Yuichi Konno, Takayoshi Daimaruya, Masahiro Iikubo, Reiko Kanzaki, Ichiro Takahashi, Junji Sugawara, Takashi Sasano

研究成果: ジャーナルへの寄稿学術誌査読

15 被引用数 (Scopus)


Introduction: We have successfully treated skeletal open bite by intruding posterior teeth with the skeletal anchorage system. Our aim in this study was to morphologically and hemodynamically evaluate the changes in pulp tissues when molars are radically intruded. Methods: The mandibular fourth premolars of 9 adult beagle dogs were divided into 3 groups: a sham operated group (n = 6, 3 dogs), 4-month intrusion group (n = 6, 3 dogs), and a further 4-month retention group (n = 6, 3 dogs). We evaluated the morphological changes of the pulp and dentin-the amount of vacuolar degeneration in the odontoblast layer, the predentin width and nervous continuity in the pulp tissue, and the pulpal blood-flow response evoked by electrical stimulation in the dental pulp. Results: Extreme molar intrusion with the skeletal anchorage system caused slight degenerative changes in the pulp tissue, followed by recovery after the orthodontic force was released. Circulatory system and nervous functions were basically maintained during the intrusion, although a certain level of downregulation was observed. These morphologic and functional regressive changes in the pulp tissue after molar intrusion improved during the retention period. Conclusions: Histologic changes and changes in pulpal blood flow and function are reversible, even during radical intrusion of molars.

ジャーナルAmerican Journal of Orthodontics and Dentofacial Orthopedics
出版ステータス出版済み - 8月 2007

!!!All Science Journal Classification (ASJC) codes

  • 歯科矯正学


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