Volumetric measurement of root resorption following molar mini-screw implant intrusion using cone beam computed tomography

Molar intrusion by mini-screw implantation can cause different degrees of root resorption. However, most methods (2-D and 3-D) used for evaluating root resorption have focused on the root length without considering 3-D resorption. The purpose of this study was to volumetrically evaluate root resorpt...

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Bibliographic Details
Published in:PloS one 2013-04, Vol.8 (4), p.e60962-e60962
Main Authors: Li, Wen, Chen, Fei, Zhang, Feng, Ding, Wanghui, Ye, Qingsong, Shi, Jiejun, Fu, Baiping
Format: Article
Language:English
Subjects:
Adolescent
Adult
Bone Screws
Bones
CAT scans
Computation
Computed tomography
Cone-Beam Computed Tomography
Dental Implants, Single-Tooth
Dental roots
Dental Stress Analysis
Engineering
Female
Humans
Implantation
Implants
Intrusion
Lasers
Measurement
Medical research
Medicine
Molar - diagnostic imaging
Molar - surgery
Molars
Orthodontic Anchorage Procedures
Orthodontics
Patients
Root resorption
Root Resorption - diagnostic imaging
Root Resorption - surgery
Roots
Scanners
Scanning
Statistical analysis
Statistical methods
Statistical significance
Studies
Systemic diseases
Teeth
Tomography
Tooth Movement Techniques
Tooth Root - diagnostic imaging
Tooth Root - surgery
Transplants & implants
Variance analysis
Volume measurement
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Summary:Molar intrusion by mini-screw implantation can cause different degrees of root resorption. However, most methods (2-D and 3-D) used for evaluating root resorption have focused on the root length without considering 3-D resorption. The purpose of this study was to volumetrically evaluate root resorption using cone beam computed tomography(CBCT) after mini-screw implant intrusion. 1. The volumes of 32 teeth were measured using CBCT and laser scanning to verify the accuracy of CBCT. 2. Twelve overerupted molars from adult patients were investigated in this study. After mini-screw implants were inserted into the buccal and palatal alveolar bones, 150 g of force was applied to the mini-screw implants on each side to intrude the molars. CBCT images of all patients were taken immediately prior to intrusion and after intrusion. The volumes of the roots were calculated using the Mimics software program. The differences between the pre-intrusion and post-intrusion root volumes were statistically evaluated with a paired-samples t-test. In addition, the losses of the roots were statistically compared with each other using one-way analysis of variance at the P0.05). The overerupted molars were significantly intruded (P
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0060962