Abstract:

Objective〓〖WTBZ〗To explore the effect of AST and ALP changes in gingival crevicular fluid for measurement of periodontal tissue health status during orthodontics therapy. 〖WTHZ〗Methods〓〖WTBZ〗44 teenager patients using a fixed appliance were enrolled in this study. Levels of AST and ALP in gingival crevicular fluid were determined by using biochemistry analysator before treatment， and one month and three months after treatment. 〖WTHZ〗Results〓〖WTBZ〗Levels of AST and ALP significantly increased one month after treatment but became normal three months after treatment. Gingival indexes of 1 month also significantly increased (P＜0.05), but they were not statistically different between the pre-treatment and the 3-month post-treatment period(P＞0.05). 〖WTHZ〗Conclusion〓〖WTBZ〗AST and ALP can be used to measure periodontal tissues.

Key words: straight wire appliance, Gingival crevicular fluid, Aspartate transaminase, Alkaline phosphatase