Platelet-rich plasma's (PRP) impacts on accelerated canine movement

Abstract

Objective: To investigate the impact of platelet-rich plasma (PRP) on canine movement acceleration.

Methods: Randomized clinical trial split-mouth study with a double-blind design and controlled group on 31 orthodontic patients, which had been indicated bilateral maxillary first premolar extraction. Each patient recorded clinical features, analyzed lateral cephalometric film, and evaluated the acceleration on dental models at every specific interval.

Result: The cumulative distance to the distal canines was larger for the PRP injection group than for the control group at three time points (4 weeks, 8 weeks, and 12 weeks), all of which were statistically significant. The PRP injection group's canine distal width increased from the first 4 weeks (ΔT1) to the highest in the middle 4 weeks (ΔT2 = 1.78 ± 0.11 mm/month), and then it gradually decreased in the last 4 weeks (ΔT3). The speed of the PRP-injected canine was faster than the control group by 1.51 times.

Conclusion: PRP can accelerate the speed of canine movement in orthodontics and can be applied for severe cases, for example, impacted tooth retraction, molar protraction or retraction, and other cases.

Keywords: Accelerated tooth movement; Canine retraction; Orthodontics; Platelet-rich plasma.

Figure 1

(a) Canine retraction phase study model and palatal lock; (b) canine movement measurement technique. The blue line represents the center of the maxilla, and the red lines run parallel to it. The accumulable distance of canines was calculated by measuring the distance between the top stainless steel wire and the junction of the red line and the canine

Figure 2

Photographs of intraoral maxillary occlusal views were taken at four different times: (T0) before the canine retraction phase, (T1) 4 weeks after activating canine retraction, (T2) 8 weeks after activating canine retraction, (T3) 12 weeks after activating canine retraction