Biomaterial Database

Analysis of forces developed during obturations. Wedging effect: Part II. 1998

J Y Blum, and P Machtou, and J P Micallef

School of Dentistry, University of Montpellier, France.

The aim of this study was to use a force analyzer device, the modified Endographe with a new cupule, to compare the forces and wedging effects developed in the root canal using four obturation techniques: warm vertical compaction, lateral condensation, thermomechanical compaction, and Thermafil condensation. The different methods--that varied in instrumentation, duration, and compaction load--were studied from graphs representing the force application sequences. In addition, the graphs resulting from modifications in technique (such as using an undersized spreader and pluggers that were either too small or too big) and deliberately induced failures in technique (by use of a too small condenser or a too small master cone) were studied. The mean values for the wedging effect for warm vertical compaction, lateral condensation, thermomechanical compaction, and Thermafil condensation were, respectively, 0.65 +/- 0.07 kg, 0.8 +/- 0.1 kg, 0.6 +/- 0.08 kg, and 0.03 +/- 0.01 kg. The use of graphs provides a new approach to the analysis of obturation techniques.

UI	MeSH Term	Description	Entries
D009716	Numerical Analysis, Computer-Assisted	Computer-assisted study of methods for obtaining useful quantitative solutions to problems that have been expressed mathematically.	Analysis, Computer-Assisted Numerical,Computer-Assisted Numerical Analysis,Analyses, Computer-Assisted Numerical,Analysis, Computer Assisted Numerical,Computer Assisted Numerical Analysis,Computer-Assisted Numerical Analyses,Numerical Analyses, Computer-Assisted,Numerical Analysis, Computer Assisted
D003748	Dental Equipment	The nonexpendable items used by the dentist or dental staff in the performance of professional duties. (From Boucher's Clinical Dental Terminology, 4th ed, p106)	Equipment, Dental,Dental Equipments,Equipments, Dental
D003799	Dental Stress Analysis	The description and measurement of the various factors that produce physical stress upon dental restorations, prostheses, or appliances, materials associated with them, or the natural oral structures.	Analyses, Dental Stress,Analysis, Dental Stress,Stress Analyses, Dental,Stress Analysis, Dental,Dental Stress Analyses
D004867	Equipment Design	Methods and patterns of fabricating machines and related hardware.	Design, Equipment,Device Design,Medical Device Design,Design, Medical Device,Designs, Medical Device,Device Design, Medical,Device Designs, Medical,Medical Device Designs,Design, Device,Designs, Device,Designs, Equipment,Device Designs,Equipment Designs
D006171	Gutta-Percha	Coagulated exudate isolated from several species of the tropical tree Palaquium (Sapotaceae). It is the trans-isomer of natural rubber and is used as a filling and impression material in dentistry and orthopedics and as an insulator in electronics. It has also been used as a rubber substitute.	Thermafil,Guttapercha,Ultrafil,Gutta Percha
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000704	Analysis of Variance	A statistical technique that isolates and assesses the contributions of categorical independent variables to variation in the mean of a continuous dependent variable.	ANOVA,Analysis, Variance,Variance Analysis,Analyses, Variance,Variance Analyses
D012389	Root Canal Obturation	Phase of endodontic treatment in which a root canal system that has been cleaned is filled through use of special materials and techniques in order to prevent reinfection.	Endodontic Obturation,Canal Obturation, Root,Canal Obturations, Root,Endodontic Obturations,Obturation, Endodontic,Obturation, Root Canal,Obturations, Endodontic,Obturations, Root Canal,Root Canal Obturations