Document Detail

Biomechanical evaluation of undersized drilling on implant biomechanical stability at early implantation times.
MedLine Citation:
PMID:  23351770     Owner:  NLM     Status:  In-Data-Review    
PURPOSE: The present study evaluated the effect of different drilling dimensions (undersized, regular, and oversized) in the insertion and removal torques of dental implants in a beagle dog model.
METHODS: Six beagle dogs were acquired and subjected to bilateral surgeries in the radii 1 and 3 weeks before euthanasia. During surgery, 3 implants, 4 mm in diameter by 10 mm in length, were placed in bone sites drilled to 3.2 mm, 3.5 mm, and 3.8 mm in final diameter. The insertion and removal torque was recorded for all samples. Statistical analysis was performed by paired t tests for repeated measures and by t tests assuming unequal variances (all at the 95% level of significance).
RESULTS: Overall, the insertion torque and removal torque levels obtained were inversely proportional to the drilling dimension, with a significant difference detected between the 3.2 mm and 3.5 mm relative to the 3.8 mm groups (P < 0.03). Although insertion torque-removal torque paired observations was statistically maintained for the 3.5 mm and 3.8 mm groups, a significant decrease in removal torque values relative to insertion torque levels was observed for the 3.2 mm group. A different pattern of healing and interfacial remodeling was observed for the different groups.
CONCLUSIONS: Different drilling dimensions resulted in variations in insertion torque values (primary stability) and stability maintenance over the first weeks of bone healing.
Paulo G Coelho; Charles Marin; Hellen S Teixeira; Felipe E Campos; Julio B Gomes; Fernando Guastaldi; Rodolfo B Anchieta; Lucas Silveira; Estevam A Bonfante
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons     Volume:  71     ISSN:  1531-5053     ISO Abbreviation:  J. Oral Maxillofac. Surg.     Publication Date:  2013 Feb 
Date Detail:
Created Date:  2013-01-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8206428     Medline TA:  J Oral Maxillofac Surg     Country:  United States    
Other Details:
Languages:  eng     Pagination:  e69-75     Citation Subset:  AIM; D; IM    
Copyright Information:
Copyright © 2013 American Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.
Assistant Professor, Department of Biomaterials and Biomimetics, New York University, New York, NY Director for Research, Department of Periodontology and Implant Dentistry, New York University College of Dentistry, New York, NY.
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