Orthodontic Appliance Clinical Trial
Official title:
Mandibular Molar Protraction Assisted by Temporary Anchorage Device and Piezoelectric Corticotomy
This study was conducted to compare the rate of second molar protraction, level of Interleukin1-β in gingival crevicular fluid, periodontal health (gingival index, plaque index, and periodontal pocket depth) and root resorption in patients treated by molar protraction with piezocision performed early at the time of protraction (Group 1), piezocision performed 3 months after molar protraction (Group 2), and no piezocision molar protraction (Group 3).
Detailed Description: Thirty-five subjects who presented with bilaterally extracted
mandibular first molar were selected to participate in the study. The subjects were
subdivided into one of 3 groups as follows: group 1 consisted of 20 subjects /20 molars where
piezocision was performed immediately before molar protraction; group 2 consisted of 20
subjects/ 20 molars where molar protraction was carried on after 3 months of molar
protraction with no piezocision; group 3 consisted of 20 subjects (40 molars) where
protraction was carried out with no piezocision.
After reaching 0.019X0.025" SS arch wire, NiTi coil spring was used for space closure
(protraction force was 150g) attached from the lower second molar hook to the head of the
mini-screw. Piezocision was performed by making 2 vertical incisions mesial and distal to the
extraction space. Piezotome was inserted in the incisions previously made and bone cuts were
done with a length up to mucogingival line and depth of 3 mm. Gingival crevicular fluid (GCF)
sample was obtained from the mesiogingival side of the lower second permanent molar with use
of Periopaper. GCF sample was repeated 1 day, 1 week and 4 weeks after molar protraction with
piezocision or with no piezocision. Periodontal parameters were measured and lower molar root
resorption was assessed using Perapical radiographs.
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