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Biomedical subjects

P Delivanis

Publications and source records attributed to P Delivanis.

4 recordsLinked to original sources
PubMed1978

A comparative sealability study of different retrofilling materials.

The purpose of the study was to compare the sealing properties of Cavit and zinc polycarboxylate cement with silver amalgam when used as retrofilling materials of root canals. The retrofilling materials were placed at the apices of dogs' teeth and were left there for a 6-month period, after which time the teeth were extracted and the marginal leakage was evaluated by C14-labeled urea. A second part of the study included an in vitro placement of the retrofillings. Previously extracted teeth were used and the same retrofilling materials were placed. They were left to set for 2 days in physiologic saline solution. Then the same evaluation for leakage was used. The purpose of the second part was to compare and evaluate the effect of aging on sealability. Under the conditions of this study, amalgam afforded a better seal in the 6-month group than polycarboxylate cement or Cavit. Both Cavit and polycarboxylate cement showed more leakage in the 6-month group. The deterioration of the seal afforded by Cavit in the 6-month group was statistically significant. The seal of amalgam was the only one which was improved by time.

Acrylic Resins↗
PubMed1978

Endodontic-orthodontic management of fractured anterior teeth.

A case history is presented of a 10-year-old patient, who accidentally injured her maxillary central incisor. The fracture of the crown extended 2 mm below the crest of the alveolar bone. After a pulpotomy was done as a temporary measure, orthodontic appliances were placed by bonding brackets on the maxillary anterior teeth and fitting a sectional arch wire to extrude the fractured tooth. After successful extrusion, the fracture line was brought above the level of alveolar bone where successful restoration of the tooth by the acid-etch method could be accomplished.

Child↗