Determination of Retention properties of Endodontic Retrograde Filling Materials under Vertical Load
Date of Award
Spring 1995
Document Type
Thesis - Restricted
Degree Name
Master of Science (MS)
Department
Dentistry
First Advisor
Austin, Peter
Abstract
Endodontic surgery encompasses many procedures aimed at isolating and removing the etiology. These procedures include apicoectomy (root resection or amputation), periapical curettage, trephination, incision and drainage, intentional reimplantation, transplantation, and implantation. Of the above procedures, apicoectomy is the most frequently performed periapical surgery. Following the root resection, it is often desirable to seal the apical canal space with a retrograde filling (retrofill). Retrograde filling materials have been evaluated extensively to determine sealing ability and microleakage or biocompatability [sic] of these materials. Once placed, these materials may be subjected to stresses and forces that can displace or dislodge them from their apical preparation. Endodontically treated teeth often require post and core retained restorations and cases have been observed where retrofillings have been displaced during post space preparation or post placement New retrofill preparation techniques utilize ultrasonic instrumentation to create deeper more conservative root end preparations without retentive undercuts that are present in traditional preparations. A root end preparation with less mechanical retention will rely more on the material's ability to closely adapt or bond to the prepared canal in order to resist displacement. Therefore, it is possible that an increased incidence of dislodged retrofills will occur. This aspect has not vigorously pursued in the literature. One study exists which evaluated the compressive force required to dislodge retrograde filling materials in simulated canals in acrylic blocks. A similar study has not been completed on human teeth. This study will evaluate the retentive properties of commonly used retrograde filling materials under vertical load.
Recommended Citation
LeValley, Bradley D., "Determination of Retention properties of Endodontic Retrograde Filling Materials under Vertical Load" (1995). Master's Theses (1922-2009) Access restricted to Marquette Campus. 5238.
https://epublications.marquette.edu/theses/5238