The aim of this study is to investigate the effect of local injection of injectable platelet rich fibrin (i-PRF) on the rate of orthodontic en masse retraction of anterior teeth clinically and to report any associated pain as well.
Trial will be carried on 2 groups, each involve 13 participants with a total of 26 participants. 1. Subject examination to ensure he/she meets the eligibility criteria of the research. 2. Leveling and alignment using fixed orthodontic appliance. 3. Upper first premolars extraction as a part of the orthodontic treatment planning. 4. With the starting of en masse retraction, injection of the (i-prf) obtained from venous sample palatally and distally to the anterior teeth in the intervention group, and sham injection in the control group. The injection in both groups will be done just before retraction, 21 and 42 days after beginning of retraction Rate of en masse retraction will be calculated for patients in both groups at the monthly basis for for months after starting en masse retraction, data will be analyzed statistically.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
26
I-prf is a second-generation PRP where autologous platelets and leukocytes are present in a complex fibrin matrix and can be obtained from blood using low-speed centrifugation without adding anticoagulants.
Sham injection as a placebo injection
Faculty of Dentistry Cairo University
Cairo, Egypt
RECRUITINGRate of En masse retraction
Alginate impression will be taken for each participant to obtain a plaster model obtained at five time points: before incisor retraction (T0), after one month (T1), after two months (T2), after three months(T3), and after four months (T4) of retraction. The models will be coded with numbers assigned to the participants, and will be sent to an assessor not participating in the research. In both groups, the amount of space closure will be calculated by a digital caliper in millimeters for each time point (T) and averaged for right and left sides.
Time frame: 4 months
Associated Pain
Pain will be assessed using a visual analogue scale questionnaire that will be completed by the patient starting from the day following i-prf injection in the intervention group or the sham injection in the control group, the questionnaire will be repeated every month until the fourth month
Time frame: 4 months
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