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Biomedical subjects

J D Preston

Publications and source records attributed to J D Preston.

At least 19 recordsLinked to original sources
PubMed1993

Annual review of selected dental literature: report of the Committee on Scientific Investigation of the American Academy of Restorative Dentistry.

The annual review of selected dental literature this year cites 384 published papers and reports. This year's review contains more editorial comment than reviews of years passed. New data on the biological responses to materials is emphasized in several sections. Observations on new compounds able to prevent plaque formation are presented. Clinically relevant advances in knowledge concerning the etching of different tooth structures are reported along with the effect of etching procedures on the dental pulp. Evaluation of periodontal diseases in all age groups is a topic. Limitations of current diagnostic techniques in periodontal disease, temporomandibular disorders, and implant therapy are included. There are new views on the use of dental amalgam. The future use of dental mercury is predicted. Interest in new ceramic systems is indicated as the demand for esthetics continues. Clinical information is emphasized over scientific information throughout this year's review.

Dental Implants↗
PubMed1992

Report of the Committee on Scientific Investigation of the American Academy of Restorative Dentistry.

The committee screened several hundred articles, citing 518 published papers. Some are present quality in research, others provide clinical interest, and some are identified as misleading. New techniques in pulp physiology and pathology are reported. Laser use and techniques in prevention, restorative dentistry, and materials use are reported. Epidemiology of selected diseases and the results of various formulations for treatment are cited. Diagnosis of craniomandibular dysfunction is well represented as well as references to literature reviews and other sophisticated scientific investigation. Research on adhesives is presented in respect to bonding agents for dentin and enamel. Several clinical studies are included, along with customary laboratory reports on several materials.

Dental Materials↗
PubMed1992

The future of computers in clinical dentistry.

It is essential that computer manufacturers and system developers increase their cooperative efforts to establish and maintain standards. Individual, stand-alone systems will not survive, and error-prone integration will prevent progress. File formats--whether graphics or text based--must be completely and seamlessly integrated between users. This has not occurred in other aspects of computer application. Can we expect it to in dentistry? We must. The profession will only reap the true benefits of computerized practice if CDA, ADA, the insurance carriers, manufacturers and developers are willing to sit together and agree to cooperative efforts. Such cooperation is imperative. While initially altruistic, it will be commercially essential in the long run. For many applications, the ability of a computer-based system to quantify information adds a new level to diagnosis. Coupled with this diagnosis support knowledge bases will provide dentists with added sophistication and expanded competence in diagnosis and treatment. It is reasonable to assume that the patient's relevant medical data--medications, status of principal organ systems, etc.--may also be made available electronically. Practice performance data, the legality of entries, and the compilation of and access to national data bases must all respect the patients' and dentists' rights and privacy, while serving society's health care needs. There are some very large issues ahead. Developing the hardware is the easy part.The software is more complex and, as it is specifically designed for dentists, more expensive. The profession is too small to share these costs over the available customer base--limiting the number of vendors that can survive.(ABSTRACT TRUNCATED AT 250 WORDS)

Computers↗
PubMed1991

Report of the Committee on Scientific Investigation of the American Academy of Restorative Dentistry.

Subjects of the past decade in the dental literature are reflected in this year's Committee report. We note the decrease in the prevalence of caries, the influence of dental implants, the advancements in dental materials, and the continued efforts to control adhesive events in the oral cavity. This year we included comments from and about many significant review articles published this past year. The Committee continues to be concerned about the quality of some of the work reported and the quality of the reporting. We have attempted to select the distinguished work, that which provides new information to our profession. The subjects covered include pulp biology, caries prevention, periodontics, implants, craniomandibular function and dysfunction, occlusion, and dental materials.

Dental Bonding↗
PubMed1991

CAD/CAM imaging in dentistry.

CAD/CAM (computer-assisted design/computer assisted manufacturing), although devised 20 years ago, has only been available for routine dental practice for 2 years. As a supplement to the conventional methods for making dental prostheses, CAD/CAM will have profound effects on the dental profession. CAD/CAM will improve versatility, accuracy, and cost effectiveness and will be a part of routine dental practice by the beginning of the 21st century.

Denture Design↗
PubMed1990

Report of the Committee on Scientific Investigation of the American Academy of Restorative Dentistry.

The growth in the dental literature continues to escalate, as evidenced by the publication of at least 326 new books in 1988 and 1989 and more than 20 new journals in 1989. There still appears to be undue emphasis on quantity instead of quality of research. This proliferation in the literature poses ever increasing difficulties to this Committee in filtering out the articles that are of particular interest to the members of the Academy and identifying those that are most likely to have a major impact on dental practice and service. The subjects covered include periodontics, caries and preventive dentistry, craniomandibular disorders, occlusion, pulp biology, ceramics, and restorative dental materials.

Dental Caries↗
PubMed1989

Report of the Committee on Scientific Investigation of the American Academy of Restorative Dentistry.

Dental research continued to grow during 1988. Unfortunately the quality does not always parallel the quantity of publications. This report obviously does not encompass all of the literature but focuses on studies that are related to trends and to matters that are considered controversial. Likewise the particular interests of the members of the American Academy of Restorative Dentistry were taken into consideration. The subjects covered include periodontics, preventive dentistry, bulp biology, craniomandibular disorders, ceramics, color in restorative dentistry, and dental materials.

Dental Materials↗
PubMed1987

Perceived or actual overlap between the scope of prosthodontics and other recognized dental specialties.

Prosthodontics does not overlap with other specialties but is integrated with them. This essential difference between "overlap" and "integration" should be made abundantly clear. No one denies that most of the population's dental needs must be served by the general practitioner, and no specialist can be completely capable within even his or her own specialty. Nevertheless, the prosthodontist, as all specialists, must assume the role of treating patients who require unusual care. It is the prosthodontist who most frequently assumes the primary role in the management of patients who require complex, demanding restorative care, and it is the prosthodontist who has the most intimate understanding of the proper diagnosis, treatment planning, integration of therapy, patient management, and aftercare for these patients.

Attitude of Health Personnel↗
PubMed1982

Measurement of paint-on die spacers used for casting relief.

Three paints used for die spacing were measured for film thickness. Two of the materials are marketed as die spacers, and the third is sold as a model airplane paint. The materials were applied to stone dies in multiple coats. They were embedded in resin, sectioned, and measured photographically through a microscope. The three die spacing materials were capable of achieving clinically acceptable relief in the range of 20 to 40 mu by using a variable number of coats. Different paints produced different thicknesses. The two paints sold specifically for die spacing gave 11 to 13 mu per coat. The hobby shop paint had the smallest film thickness per coat, yielding approximately 5 mu per layer. It also had the smallest standard deviation. This control plus the relative low cost and availabilty make it attractive for this purpose.

Cementation↗
PubMed1982

Effect of oxidation on ceramometal bond strength.

The ceramometal bond strength between SMG-3 gold alloy and Ceramco porcelain was evaluated using seven different oxidation cycles. The control group was not oxidized. Three groups were oxidized under vacuum at a temperature of 1,925 degrees F. The metal was heated (1) just until it reached temperature, (2) for 5 minutes, and (3) for 10 minutes. The last three groups were oxidized without a vacuum, with the time-temperature heat regimen the same as for the previous three groups. The group using an oxidation cycle without a vacuum and a temperature of 1,925 degrees F for 10 minutes was the only group that statistically differed from the control group.

Chemical Phenomena↗