Document Detail

Orthodontic mini-implant diameter does not affect in-situ linear microcrack generation in the mandible or the maxilla.
MedLine Citation:
PMID:  23195362     Owner:  NLM     Status:  MEDLINE    
INTRODUCTION: Microdamage reduces bone mechanical properties and thus could contribute to implant failure. The objective of this study was to investigate whether the diameter of mini-implants affects linear microcrack generation and whether this differs between the mandible and the maxilla because of their contrasting cortical thicknesses.
METHODS: Maxillary and mandibular quadrants of 5 dogs were randomly assigned to receive, in situ, no pilot drilling or mini-implant insertion (control), pilot drilling only without mini-implants, or pilot drilling plus a mini-implant of 1 of 3 diameters: 1.4 mm (n = 18), 1.6 mm (n = 18), and 2.0 mm (n = 18). Linear microcracks were assessed on basic fuchsin-stained sections by using epifluorescence microscopy.
RESULTS: Pilot drilling without mini-implant insertion produced significantly higher linear microcrack burdens in the mandible compared with the maxilla. In the both the mandible and the maxilla, all implants produced higher linear microcrack burdens than did the controls, yet there were no differences between the 3 implant diameters.
CONCLUSIONS: Neither the diameter of the mini-implant nor the site of insertion (mandible vs maxilla) had a significant effect on the amount of linear microdamage adjacent to the implant when the implants were inserted after pilot drilling in situ.
Sean Shih-Yao Liu; Enrique Cruz-Marroquin; Jun Sun; Kelton T Stewart; Matthew R Allen
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics     Volume:  142     ISSN:  1097-6752     ISO Abbreviation:  Am J Orthod Dentofacial Orthop     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-11-30     Completed Date:  2013-01-31     Revised Date:  2013-11-06    
Medline Journal Info:
Nlm Unique ID:  8610224     Medline TA:  Am J Orthod Dentofacial Orthop     Country:  United States    
Other Details:
Languages:  eng     Pagination:  768-73     Citation Subset:  D; IM    
Copyright Information:
Copyright © 2012 American Association of Orthodontists. Published by Mosby, Inc. All rights reserved.
Department of Orthodontics and Oral Facial Genetics, School of Dentistry, Indiana University, Indianapolis, USA.
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MeSH Terms
Dental Implants / adverse effects*
Mandibular Fractures / pathology*
Maxillary Fractures / pathology*
Orthodontic Anchorage Procedures / adverse effects*,  instrumentation*
Random Allocation
Reg. No./Substance:
0/Dental Implants
Erratum In:
Am J Orthod Dentofacial Orthop. 2013 Oct;144(4):500

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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