SPECIFIC OBJECTIVES OR HYPOTHESES
calculus, tooth
SECONDARY, PLAQUE
The primary objective of this randomized clinical trial was to compare round multi-strand wires and Ortho-Flex-Tech™ rectangular wire retainers, in terms of gingival health. The secondary objectives were to assess plaque and calculus accumulation, and to determine the effectiveness of these retainers in maintaining tooth alignment, as well as their failure rate. The null hypothesis was that there would be no difference between the two retainers, regarding gingival health, plaque accumulation, tooth alignment and failure rate. 