Method: Periodontal ligament distraction osteogenesis technology was applied on the experimental side; traditional orthodontic tooth movement technology on the control side in 8 dogs.

The process of rapid orthodontic tooth movement through the distraction of the periodontal ligament is similar to the process in the midpalatal suture during rapid palatal expansion.

Objective To establish an animal model for research of orthodontic rapid tooth movement through distraction osteogenesis of the periodental ligament and lay foundation for the series research on this subject.

Intracellular calcium was involved in muscarinic currents increased by hypoosmotic membrane stretch in gastric myocytes of guinea pig;