The effect of optimum microosteoperforation accelerated tooth movement on mandibular trabeculae bone volume fraction – a randomized controlled trial / Teh Ng Heng Khiang
Objective: To investigate the effect of Micro-osteoperforation (MOP) on the horizontal and vertical distribution of mandibular trabeculae pattern in relation to different MOP intervals on canine retraction. Method: This was a split-mouth randomized clinical trial of thirty participants equally ra...
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| Format: | Thesis |
| Published: |
2019
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| Subjects: | |
| Online Access: | http://studentsrepo.um.edu.my/11229/4/heng_khiang.pdf http://studentsrepo.um.edu.my/11229/ |
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| Summary: | Objective: To investigate the effect of Micro-osteoperforation (MOP) on the
horizontal and vertical distribution of mandibular trabeculae pattern in relation to
different MOP intervals on canine retraction. Method: This was a split-mouth
randomized clinical trial of thirty participants equally randomized into three groups of
different MOP intervals (four, eight and twelve weekly). Cone Beam Computed
Tomography (CBCT) images (70kV, 10mA, 10.80 seconds, field of view (FOV) of 5cm
x 5cm and voxel size of 76µm) were taken to assess the bone volume fraction (BV/TV)
in horizontal and vertical planes. Results: BV/TV was significantly reduced (mean
difference 9.79%, SD 11.89; 95% CI of 4.77 - 14.81; p = 0.00) and canine retraction
significantly increased (mean difference -1.25mm/4months, SD 0.79; 95% CI -1.59 - -
0.92; p = 0.00) at MOP sites as compared to control sites. MOP significantly changed the
vertical and horizontal patterns of trabeculae bone with lower BV/TV in the areas nearest
to intervention, as compared to the control sites. Only the 4 weekly MOP interval group
showed significant decrease in BV/TV (mean difference 14.73% SD 12.88; 95%; CI 3.96
– 25.50; p = 0.01) despite significant increase in canine retraction rate for all interval
groups. With the use of MOP, BV/TV was found to be inversely correlated to the rate of
canine retraction (r = -0.425; p = 0.039). Conclusions: There is a moderate inverse
relationship of a significant reduction of bone volume fraction as canine retraction rate
significantly increased. The bone volume fraction reduction was found significant for the
four weekly MOP interval, and has not been proven to extend beyond the interdental
region of the intervention.
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Keywords: accelerated tooth movement; micro-osteoperforation; bone volume
fraction; BV/TV |
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