Document Detail

The risk of furcal perforation in mandibular molars using Gates-Glidden drills with anticurvature pressure.
MedLine Citation:
PMID:  15716849     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: The aim of this study was to determine whether using Gates-Glidden (GG) drills and anticurvature pressure in curved mesial root canals of mandibular molars could remove more dentin from the mesial canal wall and remove less dentin from the distal canal wall at a level 2 mm below the furcation. STUDY DESIGN: In 5 groups of mesial roots with an average curvature of 32-34 degrees, 103 canals were prepared using a size #2 or #3 GG drill in the coronal third (straight portion of the canal only) or coronal half (straight portion and part of the curved portion), with or without applying anticurvature pressure. Using a modification of the Bramante muffle mold the cross-section of the mesial root at 2 mm below bifurcation was photographed twice, before and after the use of GG; the photos were then scanned as tagged image files. The thickness of the mesial and distal canal walls wer measured using an image analysis program. The reduction of the wall thickness after the use of GG was calculated. RESULTS: Before enlargement, the average and minimal thickness of the distal wall was 0.92 and 0.43 mm respectively, thinner than that of the mesial wall (1.50 and 0.87 mm, correspondingly). After the use of GG, the reduction of the mesial wall was similar to the reduction of the distal wall (P > .05 for all groups). In 4 groups the maximal reduction of the distal wall was > or =0.72 mm. CONCLUSIONS: After using GG drills and anticurvature pressure, dentin was uniformly removed regardless of the size of the GG and the depth of placement of GG. Flaring with GG drills in mandibular molars may result in perforations; application of anticurvature pressure did not reduce the risk.
Min-Kai Wu; Luc W M van der Sluis; Paul R Wesselink
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics     Volume:  99     ISSN:  1079-2104     ISO Abbreviation:  Oral Surg Oral Med Oral Pathol Oral Radiol Endod     Publication Date:  2005 Mar 
Date Detail:
Created Date:  2005-02-17     Completed Date:  2005-04-22     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9508562     Medline TA:  Oral Surg Oral Med Oral Pathol Oral Radiol Endod     Country:  United States    
Other Details:
Languages:  eng     Pagination:  378-82     Citation Subset:  D; IM    
Department of Cariology, Endodontology, and Pedodontology, Academic Centre For Dentistry Amsterdam, Amsterdam, the Netherlands.
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MeSH Terms
Dental Instruments / adverse effects*
Dental Pulp Cavity / anatomy & histology
Image Processing, Computer-Assisted
Photography, Dental
Root Canal Preparation / adverse effects,  instrumentation*
Tooth Injuries / etiology,  prevention & control
Tooth Root / anatomy & histology*,  injuries

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

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