Yamini Jeyraj1, Anil Kumar Katta2, Venkataramana Vannala3, Divya Lokanathan1, SN Reddy4, K Rajasigamani4
1Department of Orthodontics, Chettinadu Dental College and Research Institute, Kelambakkam, Chennai, India.
2Department of Orthodontics, Sibar Institute of Dental Sciences, Guntur, Andhra Pradesh, India.
3Department of Orthodontics, Panineeya Mahavidhyalaya Institute of Dental Sciences, Kamalanagar, Hyderabad, Andhra Pradesh, India.
4Department of Orthodontics, Rajah Muthiah Dental College and Hospital, Annamalai University, Chidambaram, Tamil Nadu, India.
Objectives: The objective was to estimate the level of alkaline phosphatase (ALP) in gingival crevicular fluid (GCF) during en-masse retraction stage of orthodontic tooth movement. Materials and Methods: 10 patients in the age group of 15-20 years participated in this study. GCF was sampled from the distal surface of the canine and mesial surface of the second premolar on day 0, 1, 7, 14, 21, and 28 postorthodontic treatment. Results: A marked fall in the level of ALP was evident following force application. A progressive decreasing trend in ALP activity on both distal aspect of canine and mesial aspect of the second premolar was observed. The fall in ALP was more on distal aspect canine when compared to the mesial aspect of the second premolar. Conclusions: Measure of ALP activity in GCF could be an indicator of the biochemical and cellular alterations in bone turnover and hence rate the amount of tooth movement following orthodontic force application.
Keywords: Alkaline phosphatase, gingival crevicular fluid, orthodontic tooth movement, osteoclasts.