Geometry of anchoring miniscrew in the lateral palate that support a tissue bone borne maxillary expander affects neighboring root damage

Anchoring miniscrews used for a tissue bone borne maxillary expander (C-expander) can fail if they contact tooth roots or perforate the maxillary sinus. Cone beam computed tomography images were reviewed retrospectively to evaluate the geometric factors of miniscrew placement in the palate that cont...

Full description

Saved in:
Bibliographic Details
Published in:Scientific reports 2021-10, Vol.11 (1), p.19880-19880, Article 19880
Main Authors: Oh, Song Hee, Lee, Sae Rom, Choi, Jin-Young, Ahn, Hyo-Won, Kim, Seong-Hun, Nelson, Gerald
Format: Article
Language:English
Subjects:
692/698
692/698/3008
Adolescent
Adult
Bone Screws
Computed tomography
Dental roots
Female
Humanities and Social Sciences
Humans
Male
Maxilla - diagnostic imaging
Maxilla - surgery
Maxillary sinus
multidisciplinary
Orthodontic Anchorage Procedures - methods
Orthodontics
Palatal Expansion Technique
Palate
Retrospective Studies
Risk factors
Science
Science (multidisciplinary)
Sinuses
Teeth
Tooth Root - diagnostic imaging
Tooth Root - pathology
Young Adult
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Anchoring miniscrews used for a tissue bone borne maxillary expander (C-expander) can fail if they contact tooth roots or perforate the maxillary sinus. Cone beam computed tomography images were reviewed retrospectively to evaluate the geometric factors of miniscrew placement in the palate that contribute to root proximity (RP) and sinus perforation (SP), and to investigate the differences of miniscrew placement depth (PD) and placement angle (PA) among the groups in each variable from 340 anchoring miniscrews on 70 patients whose C-expanders showed sufficient stability after palatal expansion for orthodontic treatment. Two types of miniscrews were used: a self-tapping miniscrew with 1.8 mm-in-diameter, and a self-drilling miniscrew with 1.6 mm-in-diameter. While the self-tapping larger diameter miniscrew influenced root proximity significantly, the screw location and PD affected the rate of sinus perforation. PA was significantly different between the right and left sides of the palate. The results of this study confirmed that root proximity and sinus perforation of anchoring miniscrews in a tissue bone borne palatal expander occurred due to certain risk factors, even when the palates were expanded successfully. Knowledge of these factors can help the clinician place miniscrews with less risk of root proximity or sinus perforation.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-021-99442-2