The Effects of Circumferential Supracrestal Fiberotomy on the Rate of Tooth Movement in the Beagle Mandible: a Randomized Split-Mouth Study
Abstract
Introduction: The purpose of this study was to evaluate whether a single
circumferential supracrestal fiberotomy procedure affects the bone around teeth and
accelerates tooth movements. Methods: Seven beagle dogs were fitted with orthodontic
appliances to protract the mandibular third premolars. Mandibular second premolars
were extracted. Using a randomized split-mouth design, the experimental side was
allocated to have a fiberotomy procedure around the mandibular third premolar. The
same appliance and force systems were used on both sides. Tooth movements were
analyzed over eight weeks using calipers and radiographs. The volume and density of
bone mesial to the third premolars were analyzed using μCT. Bone remodeling was
evaluated using histologic and fluorescent sections. Results: Tooth movements were not
significantly different between the control and experimental sides. There also were no
statistically significant differences in volume fraction or density of the medullary bone
mesial to the third premolar. Histologic evaluations showed no consistent pattern of
difference in osteoclast numbers between experimental and control sides, and the
fluorescent evaluations showed similar patterns of bone modeling on both sides.
Histologic evaluations of the soft tissues indicated that fibers were re-attached to the root
surface eight weeks after fiberotomy, but they were smaller and less organized than
control fibers. Conclusions: Circumferential supracrestal fiberotomy alone does not
increase the rate of tooth movements because it has little effect on bone supporting teeth.
Citation
Rochester, Katie Lyn (2018). The Effects of Circumferential Supracrestal Fiberotomy on the Rate of Tooth Movement in the Beagle Mandible: a Randomized Split-Mouth Study. Master's thesis, Texas A & M University. Available electronically from https : / /hdl .handle .net /1969 .1 /173442.