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Biomedical subjects

J F Roulet

Publications and source records attributed to J F Roulet.

At least 91 records · Page 5Linked to original sources
PubMed1982

The surface roughness of restorative materials and dental tissues after polishing with prophylaxis and polishing pastes.

The effect of prophylaxis and polishing pastes on bovine tooth hard tissues and dental materials was investigated in vitro. Four restorative dental materials (gold, amalgam, a conventional composite, a microfilled composite), brought to a standard surface finish, and two bovine dental hard tissues (enamel, dentin) were polished with ten different prophylaxis and polishing pastes. Before polishing, SEM photographs were taken of all materials, and surface profiles were obtained of every sample. After polishing, surface profiles from every sample and SEM photographs of every material/paste combination were obtained. Using the same techniques, two-step polishing procedures were also investigated. The evaluation of the surface profiles and the rated SEM photographs (by 20 dentists) showed significant paste and material differences. There was a significant correlation (0.82) between the results of the surface profiles and the SEM ratings. Almost all pastes roughened the surfaces of dental restorative materials and only a few pastes showed a tendency to render the surfaces of dental restorative materials and only a few paste showed a tendency to render the surfaces of dental hard tissues smoother. Therefore, if polishing is indicated after periodontal treatment, the paste used should be selected carefully. Since the surface roughness of conventional composites increases tremendously during each polishing with pastes, their surfaces should be avoided when using polishing pastes. If polishing with a paste in indicated, conventional composites should be polished afterwards with aluminium silicate coated discs.

Animals↗
PubMed1980

[The abrasion of composites in the region of the lateral teeth--results after 3 years].

Twenty patients managed with Adaptic, Concise-capsule, Epoxydent, and a dispersion alloy (all class II cavities) were re-examined after three years. Between 20% to 45% of the composite fillings had been replaced in this time period, but only 5% of the amalgam fillings had been renewed. Marginal defects were diagnosed with the probe in 53% to 89% of the composite fillings (amalgam, 21%); marginal discoloration was observed in 61% to 100% of the cases. With the exception of Adaptic (discolorations found in "only" 44% of the cases), all other composite fillings were discolored (100%). The following reduction in tooth structure was noted after a three year period: amalgam, 0 micron +/- 112 micron; Expoxydent, 56 micron +/- 138 micron; Adaptic, 224 micron +/- 151 micron; Concise, 201 micron +/- 93 micron.

Composite Resins↗
PubMed1979

[Dental examination of skulls of the early Middle Ages in Bial-Mett].

UNLABELLED: A systematic dental examination was made on 43 skulls from the 6th/7th and 8th/9th centuries which were excavated by the archeological service of the canton of Berne in the church of Biel-Mett. The examination consisted of the following parameters: Count, loss of teeth, caries (instrumental and radiological), calculus deposits, bone loss. The skulls were classified after age and compared with other findings. Generally speaking the results were comparable to findings of other excavations, but they are more detailed owing to more exact methods of examination. CONCLUSIONS: The examined population had lost about 23% of their teeth, had a relatively high caries incidence (30%) and a high caries morbidity. Most of the individuals had suffered from periodontal disease. High abrasion values point to the abrasive food then consumed.

Adolescent↗