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Biomedical subjects

J N Nally

Publications and source records attributed to J N Nally.

At least 37 records · Page 2Linked to original sources
PubMed1976

Accuracy of six elastic impression materials used for complete-arch fixed partial dentures.

1. The accuracy of four types of impression materials used to make a complete-arch fixed partial denture was evaluated by visual comparison and indirect measurement methods. 2. None of the tested materials allows safe finishing of a complete-arch fixed partial denture on a cast poured from one single master impression. 3. All of the tested materials can be used for impressions for a complete-arch fixed partial denture provided it is not finished on one single cast. Errors can be avoided by making a new impression with the fitted castings in place. Assembly and soldering should be done on the second cast. 4. In making the master fixed partial denture for this study, inaccurate soldering was a problem that was overcome with the use of epoxy glue. Hence, soldering seems to be a major source of inaccuracy for every fixed partial denture.

Dental Impression Materials↗
PubMed1976

[Experimental study of the value of 2 types of class III Kennedy-Applegate dentures].

This experimental research shows that a class III clasp partial dentures should present four Akers clasps. This way the occlusal rests are placed as closely as possible to the edentulous area on both sides of the arch and the abutment teeth are less stressed than if the occlusal rests are further away from saddles. On the other hand, a lingual bar of average rigidity i.e. of a thickness of 1.7-2.0 mm must be recommended. It gives sufficient resistance to the framework while allowing better distribution of force. Finally, oblique forces applied on a tooth borne unilateral prosthesis cause an increase of 65.5 per cent in abutment teeth displacement compared to forces applied to a more favorable bilateral tooth borne prosthesis.

Dental Abutments↗