Simulation of miniscrew-root distance available for molar distalization depending on the miniscrew insertion angle and vertical facial type.

ABSTRACT:

Objective

The purpose of this study was to evaluate the effects of miniscrew insertion angle and vertical facial type on the interradicular miniscrew-root distance available for molar distalization.

Materials and methods

Cone-beam computed tomography images of 60 adults with skeletal Class I occlusion exhibiting hyperdivergent (n = 20), normodivergent (n = 20), and hypodivergent (n = 20) facial types were used. Placement of a 6-mm long, 1.5-mm diameter, tapered miniscrew was simulated at a site 4 mm apical to the cementoenamel junction, with insertion angles of 0°, 30°, 45°, and 60° relative to the transverse occlusal plane. The shortest linear distance between the miniscrew and anterior root at four interradicular sites was measured: maxillary second premolar and first mola

SUBMITTER: Yoon JH 

PROVIDER: S-EPMC7514046 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature