Lactate Dehydrogenase Activity in Gingival Crevicular Fluid as a Marker in Orthodontic Tooth Movement

Alfaqeeha, Sarah A.; Anilb, Sukumaran
January 2011
Open Dentistry Journal;2011, Vol. 5, p105
Academic Journal
Objectives: This study aims at analyzing the changes in gingival crevicular fluid (GCF) lactate dehydrogenase (LDH) activity during orthodontic movement. Methods: Twenty patients all requiring first premolar extractions were selected and treated with conventional straight wire mechanotherapy. Canine retraction was done using 125 g Nitinol closed coil springs. The maxillary canine on one side served as the experimental site while the contralateral canine served as the control. GCF was collected from the canines before initiation of retraction, then 1 hour after initiating canine retraction, followed by 1 day, 7 days, 14 days and 21 days. GCF LDH levels were estimated and compared with the control site. Results: The results revealed significantly higher LDH levels on the 7th, 14th and 21st day at the sites where orthodontic force had been applied. The levels also showed a significant increase from 0 hour to the 21st day. Peak levels were seen on 14th and 21st day following initiation of retraction. Conclusions: The study showed that LDH could be successfully estimated in the GCF and its increased levels could indicate active tooth movement, which could aid the clinician in monitoring active orthodontic tooth movement.


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