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At least 109 records · Page 6Linked to original sources
PubMed1980

[Animal experimental studies on the healing of tooth fractures with conventional splinting and with endodontal tension screws].

Using polchromatic sequential labeling, the healing of experimentally inflicted root fractures was observed in beagle dogs. A transition through hard substances formed from vascular connective tissue of the periodontium occurred only in the fine fracture line. It was not related to the pulp, since it also appeared after endodontal fixation. A vascular mineralization occurs in the extra-fine tissue which can be reached through a tension screw into the pulp cavity. This mineralization leads to a filling of the fragments. Dislocated root fragments heal incompletely due to interposition of connective tissue.

Animals↗
PubMed1995

Indirect composite preparation width and depth and tooth fracture resistance.

PURPOSE: To evaluate the influence of preparation width and depth on the fracture resistance of teeth restored with one type of indirect composite restoration. MATERIALS AND METHODS: Variations of depth and width were superimposed on a preparation of dentin design and dimensions with other variables including tooth size and morphology being controlled. Indirect composite restorations were constructed and placed in accordance with manufacturer's instructions. The restored teeth were subjected to compressive loading with fracture being induced by application of a 4 mm steel rod to the specimens in a universal testing machine, at a cross-head speed of 1 mm/minute. RESULTS: Preparation depths of 3 to 4 mm were found to be preferable, but when the prevalence of severe tooth fracture was assessed, the shallower preparation depth was found to be indicated. Cavity depths of one-third and one-half bucco-lingual width were evaluated, the fracturing forces for the group with the narrower width being statistically lower.

Analysis of Variance↗