Obturation


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obturation

[‚äb·tə′rā·shən]
(medicine)
The closing of an opening or passage.
A form of intestinal obstruction in which the lumen is occupied by its normal contents or by foreign bodies.
(ordnance)
Sealing of the breech of a gun to prevent escape of propellant gases in firing.

Obturation

 

the sealing of the barrel when firing a firearm in order to prevent the forward or backward escape of powder gases.

In guns that load by cartridge, obturation is achieved by the use of a brass cartridge case that expands when the gun is fired and ensures that the barrel is sealed on the breech side. In artillery guns that are loaded separately, obturation is achieved by using special devices in the breech called obturators. Escape of the gases in the direction of shell movement is prevented by the rotary bands of shells and casings of bullets; in mortars it is prevented by annular grooves on the cylindrical part of the shell.

References in periodicals archive ?
Influence of root canal instrumentation and obturation techniques on intra-operative pain during endodontic therapy.
Additionally, all the root canals were prepared to the same final apical size and both the preparation and obturation steps were conducted by the same operator.
The purpose of this study is to compare the newly introduced Activ GP obturation system to the continuous wave of condensation technique with a resin based sealer over a 10-month period.
Initial hemostasis was achieved in 13 of 15 patients in the obturation group (87%) and in 5 of 11 in the ligation group (45%) (Hepatology 33[5]:1060.
After 4 months of obturation of the canine, lateral and central incisors we go for GTR (guided tissue regeneration) with collagen membrane, bone graft and free mucosal graft surgery.
NSCH is often used for prolonged periods in root canals for disinfection and for the establishment of a hard tissue barrier to facilitate root canal obturation in non-vital immature incisors.
INDUSTRY OVERVIEW II-1 Prelude II-1 Increasingly Complex Endodontic Cases Spur Advancements II-1 No Longer Immune to Economic Turbulence II-2 Noteworthy Trends & Issues II-3 Technological Advancements Influence Trends in Endodontics Space II-3 Automation: the Ongoing Trend in Root Canal Therapy II-3 Stem Cell Therapy - The New Name of the Game II-3 Regenerative Endodontics: The Current Buzzword in the Market II-4 Growing Prominence of Bioactive Materials in Endodontics II-4 Using Calcium Hydroxide as Interim Intracanal Medicament II-5 Treatment of Residual Obturation Materials II-5 Focus on Developing Endodontic Materials with Better Aesthetics II-5 Bacteria in Root Canals: What's the Risk?
5% NaOCl and Chlorhexidine, and obturation with gutta-percha and AH-26 sealer (Dentsply, USA).
Additionally, through SIMFRA, we will continue to concentrate our efforts on the recently introduced Maillefer Profile(R) Nickel Titanium Engine Driven Endodontic Files and the Thermafil(R) Obturation System.
Gutta percha was used for root canal obturation with the 11 being root filled to the fracture line.
Developed at Loma Linda University, USA in 1993 for root-end obturation, MTA is now used in procedures such as direct pulp capping, pulpotomy, apexification and repair of root and furcal perforations [Torabinejad and Chivian, 1999].
RECENT INDUSTRY ACTIVITY II-16Brasseler Introduces New Endodontic Obturation Approach II-16Wykle Research Partners with Nordiska Dental for Calasept Endoline II-16Sunstar Americas Unveils New GUIDOR Allograft II-16SybronEndo Launches K3(TM)XF Nickel Titanium Files II-17Henry Schein Completes Acquisition of Ortho Organizers II-17