Thesis (doctoral)--München, 1935.

Thesis (M.S.)--University of Michigan, 1950.

Thesis (M.S.)--University of Michigan, 1951.

Thesis (M.S.)--University of Michigan, 1947.

Thesis (M.S.)--University of Michigan, 1986.

Thesis (doctoral)--München, 1935.

Thesis (M.S.)--West Virginia University, 2010. / Title from document title page. Document formatted into pages; contains iii, 29 p. : col. ill. Includes abstract. Includes bibliographical references (p. 24-29).

Thesis (doctoral)--Münster in Westfalen, 1934.

published_or_final_version / Dentistry / Master / Master of Dental Surgery

The purpose of this study was to determine duration time, breakage and apical displacement, whilst using six different endodontic filing systems to prepare molar teeth. A total of 96 molar teeth were used in the study, divided equally, ie 16 teeth per system selected randomly, totalling 48 canals per system. A standardised access cavity was prepared for all the teeth before selection. The canals were filed according to the manufacturers&rsquo / guidelines. The result showed that PROTAPER&reg / , K3&trade / and the combination of: HERO Shaper&reg / , HERO Apical&reg / and Endoflare&reg / (Referred from hereon as HERO System for convenience) were statistically faster than PROFILE&reg / and FlexMaster&reg / , which were in turn faster than AETTM. Although breakage did occur in K3&trade / and HERO System this was not deemed statistically significant. Apical displacement occurred in the form of Type 1 in the AETTM, PROFILE&reg / and HERO System, but once again this was not statistically significant. It was concluded that more aggressive cutting features such as a positive rake<br /> angle, pyramidal shaped tip, progressive taper and absence of radial lands, if present, could have enabled K3&trade / , HERO System and PROTAPER&reg / to have faster times, and in addition these features did not compromise these systems with regard to apical foramina transportation and breakage.