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Biomedical subjects

J W Harrison

Publications and source records attributed to J W Harrison.

At least 37 records · Page 2Linked to original sources
PubMed1984

Irrigation of the root canal system.

Debridement of the root canal system is essential for predictably successful endodontic therapy. The use of an endodontic irrigant during canal preparation is necessary to adequately debride the canal system. A review of the scientific evidence related to the desirable properties of an endodontic irrigant indicates that a solution of 5.25 per cent sodium hypochlorite is currently the irrigant of choice. This chemical agent exhibits powerful antimicrobial activity, is an excellent necrotic tissue solvent, and is the most efficient irrigant in removing organic debris from the root canal system.

Biomechanical Phenomena↗
PubMed1980

The effect of root resection on the sealing property of root canal obturations.

Root canal systems of extracted anterior teeth were obturated with sealer and either multiple gutta-percha cones or single silver cones. The effect of root resection on the sealing property of these obturating materials was evaluated by autoradiographic methods. Results indicate that root resection with a rotary instrument in a high-speed handpiece does not adversely affect the sealing property of well-condensed gutta-percha-sealer obturations.

Apicoectomy↗
PubMed1979

An analysis of the sensitivity of non-rereduced PRS medium in endodontic therapy.

A total of 244 paired samples were obtained from sixty-one root canal systems at four specific stages of endodontic treatment. Half the samples were placed in a commonly used endodontic medium and incubated aerobically. The remaining samples were placed in PRS medium and incubated in an anaerobic environment. The rereduction procedure, used to remove oxygen entering the PRS medium at the time of insertion of the sample, was not employed. A statistical analysis of the results indicates that the non-rereduced PRS medium is not as sensitive as rereduced PRS and offers no significant advantages over trypticase soy broth with 0.1 percent agar.

Aerobiosis↗