The Effect of Autologous Platelet Concentrations on Orthodontic Treatment Time

Summary

60 patients needed therapeutic extraction of the maxillary first premolars with subsequent retraction of the maxillary canines were divided to randomly three groups:

(1) PRP group: Received PRP injections, (2) I-PRF group: Received I-PRF injections, (3) Control group: conventional treatment with no injections. TPAs were used as an anchor unit. Coil springs were used to distalize the upper canines on 0.019 x 0.025-inch stainless archwires. Alginate impressions and dental casts of the maxillary arch were done at five-time points over a 4-month follow-up period. The amount of canine movement, canine rotation, and anchorage loss were measured on three-dimensional digital models superimposed on the rugae area.

Conditions

• Class II Division 1 Malocclusion

Interventions

OTHER

The platelet-rich plasma (PRP)

Twenty ml of venous blood was drawn from each patient with the use of PRP tubes that contain anticoagulant citrate dextrose. The double-spin technique was used to prepare the PRP. The injection areas were anesthetized with lidocaine 2% with epinephrine 1/80000 and left for 10 minutes. 15 units (0. 15 mL) of PRP were injected interaligamentlly in the middle, distobuccal, and distopalatal areas of the distal surface of the upper canines (5 units in each area) together with submucosal injections buccally and palatally (100 units and 50 units , respectively).

OTHER

The injectable platelet-rich fibrin (I-PRF) group

Twenty ml of venous blood was drawn from each patient in this experimental group. I-PRF was prepared with the use of 20 ml of blood drawn from the patient in dry sterile tubes without anticoagulant (quickly before coagulation starts) by following the centrifugation protocol requires one cycle only (700 RPM for 3 minutes) Injection procedures, sites, and time were similar to the PRP group.

DEVICE

The control group

NiTi closed-coil springs (American Orthodontics, Sheboygan, WI) were used to impose 150 g force from the first molar band hook to the bracket of canine on each side on 0.019\*0.025-in SS archwire Patients' follow-up appointments were two weeks intervals; at each visit, the force produced by the coil was checked and readjusted when needed in order to keep it at 150-g level and the appliances were examined for any deformation or change in the position because of chewing. Canine retraction continued until achieving Class I canine relationship.

Sponsors & Collaborators

• Hama University

  collaborator OTHER

• Damascus University

  lead OTHER

Principal Investigators

• Ali Ammar, DDS, MSc · Department of orthodontics, Hama University, Syria

• Rabab al-Sabbagh, DDS,MSc,PhD · Department of orthodontics, Hama University, Syria

• Mohammad Y Hajeer, DDS,MSc,PhD · Department of orthodontics, Damascus University, Syria

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

SINGLE

Model

PARALLEL

Eligibility

Min Age

18 Years

Max Age

25 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2019-02-08

Primary Completion

2019-05-12

Completion

2020-12-25

Countries

• Syria

Study Locations