Document Detail

Coronal sealing ability of three sectional obturation techniques--SimpliFill, Thermafil and warm vertical compaction--compared with cold lateral condensation and post space preparation.
MedLine Citation:
PMID:  17201749     Owner:  NLM     Status:  MEDLINE    
The purpose of this study was to evaluate the effect post space preparation has on the coronal seal of root canals obturated with cold lateral condensation of gutta-percha compared with the corsonal sealing ability of three sectional obturation techniques not requiring post space preparation. Sixty-eight human maxillary central incisors were divided equally into four groups: cold lateral condensation (Group I), SimpliFill (Group II), Thermafil (Group III) and warm vertical compaction (Group IV). After coronal flaring, all four groups were cleaned and shaped with Lightspeed rotary instruments to a size 60 master apical rotary. After obturation Peeso Reamers were used to create a post space for Group I, while Groups 2, 3 and 4 incorporated the post space in the obturation (sectional technique) and did not require making a post space after obturation. The teeth were then stored in 100% humidity for 1 week and then kept in rhodamine B fluorescent dye for 3 weeks. The teeth were then split open, and the linear dye penetration from a coronal to apical direction (coronal seal) was evaluated with a fluorescent light microscope. Statistical analysis showed that Group I (cold lateral condensation followed by post space made with Peeso Reamers) leaked significantly more (P < 0.05) than the remaining three sectional obturation groups. It was concluded that stresses generated during post space preparation might be detrimental to the seal obtained by the obturation. Sectional obturations with their superior sealing ability offer a viable alternative.
Velayutham Gopikrishna; Anantanarayanan Parameswaren
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Publication Detail:
Type:  Comparative Study; Evaluation Studies; Journal Article    
Journal Detail:
Title:  Australian endodontic journal : the journal of the Australian Society of Endodontology Inc     Volume:  32     ISSN:  1329-1947     ISO Abbreviation:  Aust Endod J     Publication Date:  2006 Dec 
Date Detail:
Created Date:  2007-01-04     Completed Date:  2007-02-15     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100888004     Medline TA:  Aust Endod J     Country:  Australia    
Other Details:
Languages:  eng     Pagination:  95-100     Citation Subset:  D    
Department of Conservative Dentistry and Endodontics, Meenakshi Ammal Dental College, Chennai, Tamil Nadu, India.
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MeSH Terms
Dental Leakage / diagnosis,  etiology,  prevention & control*
Fluorescent Dyes / diagnostic use
Microscopy, Fluorescence
Post and Core Technique / adverse effects*,  instrumentation
Rhodamines / diagnostic use
Root Canal Filling Materials
Root Canal Obturation / methods*
Statistics, Nonparametric
Zinc Oxide-Eugenol Cement
Reg. No./Substance:
0/Fluorescent Dyes; 0/Methylmethacrylates; 0/Rhodamines; 0/Root Canal Filling Materials; 0/Zinc Oxide-Eugenol Cement; 14899-08-2/rhodamine B; 60318-33-4/IRM cement

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

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