Endodontics and Endodontology Commons^™

The Functional Stress Analysis Of Post Reinforcement, Robert V. Bravin

Loma Linda University Electronic Theses, Dissertations & Projects

Research was undertaken in order to functionally test the reinforcement capabilities of several commonly used, standard manufactured posts. One hundred and ten maxillary lateral incisors were mounted in plastic, reinforced with the posts at different levels, and then restored with standardized crowns. These teeth along with control groups, were then placed in a custom, mounting jig which properly positioned them for the stress testing. The forces required for fracturing these teeth were recorded and subsequently analyzed.

The statistical analysis of the experimental results demonstrated that posts do not reinforce teeth as supposed; they may, in fact, weaken them. Analysis also …

Histology Of Apical Tissue : A Comparative Study Of Sargenti Formula, Short Vs. Overfill, James G. Schulze

Loma Linda University Electronic Theses, Dissertations & Projects

Four Stump-tail monkeys (Macaca spiciosa) were used for this study to analyze, on a cellular level, the apical tissue of teeth overfilled versus teeth filled short 1-3 mm. of the radiographic apex with the Sargenti formula. In each animal four incisors were filled short and four incisors were overfilled. A final sample size consisted of 28 teeth. The time periods ranged from 48 hours to 120 days. After analysis of the histology it can be stated that the teeth filled short showed no inflammation to moderate inflammation in the periapical tissues. In teeth overfilled there was a range from moderate …

Determination Of Lead Content In Apical Tissue Following Root Canal Obturation With Sargenti's Formula, G. Merle Hickok

Loma Linda University Electronic Theses, Dissertations & Projects

Four Stump-tail monkeys were used to help determine if the lead in Sargenti's formula diffuses out into the apical tissue while confined entirely within the root canal. In each animal two teeth were filled with Sargenti's formula 1-2 millimeters short of the radiographic apex, and two teeth were filled with gutta percha and Proco-Sol sealer for controls, making a total sample size of sixteen. The time ranged from 48 hours to 120 days. Lead analysis using the spectrophotometric method showed a higher lead content in the teeth filled with Sargenti's formula than with the gutta percha controls.