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Biomedical subjects

G M Ritchie

Publications and source records attributed to G M Ritchie.

At least 19 recordsLinked to original sources
PubMed1992

Intentional replantation of a removable partial denture abutment tooth: a case report.

Intentional tooth replantation is a last-resort procedure, recommended only when all other techniques, short of tooth extraction, have been exhausted or are impractical. Although most endodontic textbooks describe the procedure, and many reports of intentional replantation have appeared in the dental literature, none have reported use of the technique to retain a removable partial denture abutment tooth. This article presents such a case and the rationale for the decision to intentionally replant. Eighteen-month follow-up clinical and radiographic results are presented.

Bicuspid↗
PubMed1986

Relationship between jaw movement and food breakdown in human mastication.

Different quantities and sizes of peanuts were offered to six human subjects for mastication at two or three experimental sessions during which jaw movements and chewing cycle duration were measured. The amplitude of vertical movement and cycle duration depended on the position of a chew in a sequence of chews (masticatory sequence). Cycle duration also depended on the position of a given masticatory sequence during the first experimental session, the earlier sequences tending to be longer. Lateral jaw movements fluctuated about a reasonably constant value during a sequence and were unaffected by different food inputs. The amplitude of vertical movements increased markedly with an increase in food weight but was unaffected by change in the initial food particle size. These results were analyzed in the light of previous reports on the comminution of peanuts. It is hypothesized that observed jaw movements were unrelated to food particle size but that the amplitude of each vertical movement depended on the volume of food that was broken by the teeth during the next closing stroke. This food volume was provided and selected by bulk movements of the tongue during the preceding jaw opening.

Adult↗
PubMed1978

Antimycotic denture adhesive in treatment of denture stomatitis.

The mycologic findings of Candida albicans or culturally similar yeasts in 70% of the subject sample is consistent with those of other researchers. It is, however, only one of several etiologic factors requiring concomitant study to obtain meaningful results. Use of an antimycotic denture adhesive did not prove to be effective in the treatment of denture stomatitis. Although in the trial it appeared that marginally better results were obtained with the amphotericin medicated adhesive, this could not be substantiated statistically. On retrospective testing in the laboratory, both medicated and placebo materials were found to have an inhibiting effect on the growth of C. albicans. However, it was considered that the beneficial effects noted were probably due to the adhesive and lubricant effects of the test materials in reducing denture trauma in function.

Adhesives↗