Effect of quantity of periodontium on autotransplantation teeth with pre-extraction jiggling force

Influence of orthodontic force on osteoprotegerin and osteoprotegerin ligand mRNA expression in the inflammatory periodontal tissues;

RESULTS:After the first day we put orthodontic force on the rabbits,the activation of AKP?ANAE droped,the activation of ACP pose obviously;seven days later, the activation of AKP?ANAE pose gradually,th.

Influence of reciprocating force of inertia on in-line internal combustion engine transient speed;