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Biomedical subjects

M Spirgi

Publications and source records attributed to M Spirgi.

At least 55 records · Page 3Linked to original sources
PubMed1975

[The centric relation. I. Contribution to the study of the reliability of 3 materials for interocclusal registration].

Three materials commonly used for interocclusal registrations are tested under habitual conditions. The wax-type samples are softened in hot water to the optimal temperature, and then cooled off for hardening either in ice water, or room temperature water, or at room temperature air. These materials are stored for one month. Measurements are taken: - prior to any treatment - after hardening - after storage. The results are statistically analyzed. The least distorsion of material is obtained with the softer wax and vice versa. The room temperature air cooling has given best results. Time does not seem to modify measurements made on heat treated materials which may be accurately stored at room temperature.

Dental Impression Materials↗
PubMed1975

[The Centric relation. II. Volumetric variations during the mounting of models on the articulator].

When mounting models on the articulator there is some possibility of error due to the expansion of plaster during the setting period. If one does not pay attention to this expansion, one can observe an opening in between the arms of the articulator. In order to minimize expansion one must: -- increase the W/P ratio -- decrease the amount of plaster used for mounting the models The expansion modifies the reference plane and this is important only in case of remountings.

Dental Materials↗