The long duration of orthodontic treatment is one of the most frequent complaints of orthodontic patients. It results from the use of traditional mechanical forces to induce movement by stimulation of resorption modelling in the paradental tissue (1). Long term orthodontic treatment causes increase in the risk of dental caries, gingival recession and root resorption. Shorter duration of orthodontic treatment is the need of the hour in current practice as huge number of adult patients demand results within a short span of time. As a result, there is an increased number of studies focusing on methods that accelerate orthodontic tooth movement.

Several noninvasive or invasive techniques have been proposed clinically or experimentally for accelerating orthodontic tooth movement (2). The noninvasive techniques include (a) biomechanical approach such as the self-ligation brackets (b) physiological approach such as the direct electric current stimulation, the low-level laser therapy, vibration or photo modulation and (c) pharmacological approach such as the injection of prostaglandin or relaxin (3).

Keser and Dibart, introduced the Piezocision technique, a novel minimally invasive technique for accelerated tooth movement (4). One of the recently used local agents to accelerate the rate of orthodontic tooth movement is platelet-rich plasma (PRP). PRP is defined as an autologous concentration of platelets in a minute volume of plasma.

Through this study, we will be assessing and comparing the rate of enmasse retraction between Piezocision and Platelet-rich plasma (PRP) induced accelerated tooth movement in bimaxillary protrusion cases.