Authors : Justin Jolly, Balakrishna Shetty, Goutham Reddy, Sunil Muddaiah, Sanju Somaiah, Muhasin Essa
DOI : 10.18231/j.jco.2019.012
Volume : 3
Issue : 2
Year : 2019
Page No : 8-14
Background and objective: With the emerging concept of accelerated orthodontics, the duration of treatment has become a primary concern for the orthodontists and the patients. The emergence of Piezocision has influenced the efficiency, duration, cost and convenience of accelerated orthodontics dramatically. Here, an effort has been made to compare and assess the rate of retraction between piezocision induced and conventional retraction. Methodology: A split mouth study was done on patients requiring first premolar extraction to compare the changes in the rate of retraction where enmasse retraction was done by active tie backs, with piezocision on the experimental side and without piezocision on the control side. A mid-level incision was placed between the roots of the teeth allowed insertion of the piezoelectric knife into cortical and medullary bone to get full effect of regional acceleratory phenomenon (RAP). Measurements were taken at 3 intervals: T0 - Beginning of enmasse retraction, T1 - After completion of enmasse retraction on experimental side and T2 - Bilateral completion of enmasse retraction. Cast measurements were taken at T0 and T1 using digital vernier caliper.
Results: (1) The rate of retraction was in a velocity of 1.5275±0.18337 mm/month versus 0.8863±0.09833 mm/month with conventional enmasse retraction. (2) The Piezocision side is 1.725 times faster than conventional retraction side. (28.8571/16.7286).
Interpretation and Conclusion: It was concluded from the study that piezocision assisted enmasse retraction was 1.75 times significantly faster than conventional retraction. The difference in the rate of retraction of both was statistically significant.
Key words: Piezocision, Piezotome, Accelerated orthodontics, Regional acceleratory phenomenon (RAP)..