Article

Rapid maxillary anterior teeth retraction en masse by bone compression: a canine model.

Department of Orthodontics, Guangdong Provincial Stomatological Hospital, Southern Medical University, Guangzhou, China.
PLoS ONE (Impact Factor: 3.73). 01/2011; 6(10):e26398. DOI:10.1371/journal.pone.0026398
Source: PubMed

ABSTRACT The present study sought to establish an animal model to study the feasibility and safety of rapid retraction of maxillary anterior teeth en masse aided by alveolar surgery in order to reduce orthodontic treatment time.
Extraction of the maxillary canine and alveolar surgery were performed on twelve adult beagle dogs. After that, the custom-made tooth-borne distraction devices were placed on beagles' teeth. Nine of the dogs were applied compression at 0.5 mm/d for 12 days continuously. The other three received no force as the control group. The animals were killed in 1, 14, and 28 days after the end of the application of compression.
The tissue responses were assessed by craniometric measurement as well as histological examination. Gross alterations were evident in the experimental group, characterized by anterior teeth crossbite. The average total movements of incisors within 12 days were 4.63±0.10 mm and the average anchorage losses were 1.25±0.12 mm. Considerable root resorption extending into the dentine could be observed 1 and 14 days after the compression. But after consolidation of 28 days, there were regenerated cementum on the dentine. There was no apparent change in the control group. No obvious tooth loosening, gingival necrosis, pulp degeneration, or other adverse complications appeared in any of the dogs.
This is the first experimental study for testing the technique of rapid anterior teeth retraction en masse aided by modified alveolar surgery. Despite a preliminary animal model study, the current findings pave the way for the potential clinical application that can accelerate orthodontic tooth movement without many adverse complications.
It may become a novel method to shorten the clinical orthodontic treatment time in the future.

0 0
 · 
0 Bookmarks
 · 
115 Views
  • [show abstract] [hide abstract]
    ABSTRACT: Changes in the process of wound healing and in the dental pulp were examined following anterior and posterior mandibular subapical osteotomies in pig-tailed macaque monkeys. Results of microangiographic and histologic investigations indicated that degenerative pulpal changes may occur following mobilization and repositioning of small dentoalveolar segments. The potential significance of such degenerative pulpal changes and the need for routine dental radiographic checkups following anterior and posterior mandibular dentoalveolar surgery are discussed.
    Journal of Oral and Maxillofacial Surgery 07/1985; 43(6):408-16. · 1.33 Impact Factor
  • [show abstract] [hide abstract]
    ABSTRACT: Corticotomy-assisted and osteotomy-assisted tooth movement involves surgical incisions through the alveolar bone. To ascertain whether teeth move by distraction osteogenesis or by regional accelerated phenomenon (RAP), we randomly assigned 30 Sprague-Dawley rats to one of 5 experimental groups: corticotomy alone, corticotomy-assisted tooth movement, osteotomy alone, osteotomy-assisted tooth movement, or tooth movement alone. Each animal was imaged by microtomography immediately after surgery, after 21 days, and after 2 months. After 21 days, regional accelerated phenomenon was observed in the alveolar bone of the corticotomy-treated animals and distraction osteogenesis in the osteotomy-assisted tooth movement animals. Pixel count data were analyzed by nested ANOVA for 5 experimental groups, split-mouth controls, 3 levels along the root, and 5 sites per level. The most demineralized sites after 21 days differed for each of the experimental groups. Our study indicates that osteotomies and corticotomies induce different alveolar bone reactions, which can be exploited for tooth movement.
    Journal of Dental Research 10/2008; 87(9):861-7. · 3.83 Impact Factor
  • Journal of clinical orthodontics: JCO 06/2001; 35(5):331-9.

Full-text (2 Sources)

View
2 Downloads
Available from

Chufeng Liu