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Biomedical subjects

R D Cowan

Publications and source records attributed to R D Cowan.

15 recordsLinked to original sources
PubMed1993

Verifying the reliability of interchanging casts between Hanau Modular articulators.

PURPOSE: The purpose of this study was to test the Hanau Modular Articulator system with programmed fossae to determine its interchangeability. MATERIALS AND METHODS: Eight Hanau Modular Articulators were tested using the same measuring system as previously developed in a similar investigation on a different instrument. RESULTS: It was determined that the Hanau Modular System with programmed fossae did possess accuracy when a measuring device was transferred between the eight articulators tested. CONCLUSIONS: Laboratory procedures for multiple restorations can be accomplished with accuracy when master casts and mountings are transferred between Hanau Modular Articulators.

Dental Articulators↗
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↗
PubMed1991

Patient use of removable partial dentures: two- and four-year telephone interviews.

Two telephone surveys requested patients to report on their use of removable partial dentures that were constructed by undergraduate dental students. In the first survey, of the 431 patients called, 290 were contacted and interviewed 24 to 33 months after their removable partial denture(s) had been inserted. Of these, 258 patients reported using their prostheses and 238 had no apparent problems. In the second survey, the 238 trouble-free removable partial denture wearers from the first survey were called and 169 were contacted and interviewed 48 to 57 months after the removable partial dentures had been inserted. Of these, 156 reported still using their prosthesis and 152 had no apparent problems. These data are provided, along with some interpretive caveats, for dentists to use in discussing treatment options with patients.

Consumer Behavior↗
PubMed1991

Integrating dental and medical care for the chronic bulimia nervosa patient: a case report.

Excessive tooth erosion and resulting sensitivity and esthetic concerns are well-documented problems in patients with eating disorders. Several techniques for restoring lost tooth structure have been reported in the literature. However, the potential significant role of dental care in the comprehensive treatment of the chronically bulimic patient has received little attention. Integration and coordination of dental treatment with medicopsycho-social therapy of the bulimic patient may enhance the patient's success in combating this complex disorder. The key to proper dental management is a definitive approach to data collection and close coordination among all health care personnel providing primary health care therapy. A specific dental approach model is recommended in this report of a patient with a 15-year history of bulimia.

Adult↗
PubMed1990

Predicting esthetics of laminate veneers without tooth preparation.

High expectations may contribute to stress in the patient and dentist during dental treatment. Esthetic and restorative results can be predicted for laminate veneers by using a powder blower and a liquid dispenser preoperatively to form self-cured resin veneers. Trial veneers are formed in a precision "salt and pepper" technique that conserves materials and time. The trial veneers are placed, without tooth preparation, on the treatment site so that the patient can preview the planned treatment and so that the dentist can explain proposed treatment in a reversible procedure. This may circumvent misunderstandings between dentist and patient and allow the consideration of alternate treatment plans.

Acrylic Resins↗
PubMedDate not supplied

Verifying the reliability of interchanging casts with semiadjustable articulators.

Interchangeability of a semiadjustable articulator could be of significant convenience and economic benefit to the restorative dentist. The manufacturer of the Whip-Mix Model 2240 articulator claims such interchangeability. This study evaluated the accuracy of the cross-mounting capability of eight such articulators, then compared the measured results with those obtained from eight semiadjustable instruments for which the manufacturer makes no such promise of interchangeability. It was determined that the Model 2240 articular did possess accuracy when a measuring device was transferred between the eight materials tested.

Analysis of Variance↗