PubMed Health⌕ Search

Biomedical subjects

J D Preston

Publications and source records attributed to J D Preston.

At least 19 recordsLinked to original sources
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↗
PubMed1979

A reassessment of the mandibular transverse horizontal axis therory.

1. Within the limits of accuracy imposed by individual operators, equipment, and patient variations, a single transverse horizontal axis can usually appear to be located. 2. Location of a kinematic axis is worthwhile clinical procedure to transfer an arc of rotation in the sagittal plane from the patient to an articulator. 3. Past experiments have been useful, but none have proved or disproved the presence of colinear or noncolinear condyle arcs. Only the arc of the rigid clutch and its associated mechanism is located. Such an apparent arc may result from the resolution of compound condylar movements. 4. The right angle-nonright angle concept is misleading and generally is not applicable to clinical procedures. 5. The anatomic asymmetries of the axis transfer procedure may result in cast dislocations that may produce undesirable alterations in esthetic tooth positions. 6. The single transverse horizontal axis as a fact in articulating instruments and as a theory in the human craniomandibular complex. 7. The terms "transverse horizontal mandibular axis" and "intercondylar axis" should not be confused or used as synonyms. The term "transverse horizontal mandibular axis" ("hinge axis") should be used instead of "condylar" or "intercondylar" axis.

Cephalometry↗
PubMed1979

Preventing ceramic failures when integrating fixed and removable prostheses.

The successful integration of fixed and removable units requires diagnostic skill, careful planning, and adherence to detail in execution. Failures can be either in function or esthetics, may occur in either the fixed or removable segment, and can be catastrophic or insidious. Success demands that all the customary requirements for each independent unit, fixed or removable, be met and then the additional requirements for integration be ascertained and fulfilled. In such situations there are an exponentially greater number of possibilities for failure. When the dentist is alert to the potential for failure he may intercept and prevent it. Meticulous care pays long-term dividends in the lasting satisfaction of a patient who enjoys imporved masticatory performance, preservation of the existing tissues, and self-confidence borne from a smile that does not reveal differences between the natural and the simulation of nature. The integration of fixed and removable units is another manifestation of the skillful blending of science and art.

Ceramics↗
PubMed1978

Light and lighting in the dental office.

For any task, the eye can respond effectively if there is enough light, if that light is properly distributed, if the appropriate color correction is provided, and if visual contrasts are balanced. Dental offices differ in the types of work performed, the number of people engaged in various tasks, and the types of patients treated. Each office and each room can be planned according to the guidelines herein suggested as long as a rational analysis is applied to the result desired and the tasks being accomplished. The authors suggest that all concerned with office design, the architect, the contractors, and even other illuminating engineers be asked to read this article before integrating their efforts, for the dental office presents some variations not frequently encountered by these people. The need for conservation of our energy sources mandates wise use of all our energy expenditures. There is another resource conservation need that is sometimes overlooked--the effective use of talented people such as the dentist and his staff. The employment of adequate illumination design heeds both demands while giving a rewarding pleasantness and enjoyment of the work environment.

Age Factors↗
PubMed1976

A systematic approach to the control of esthetic form.

A systematic, orderly approach to the problem of establishing harmonious phonetics, esthetics, and function in fixed restorations has been described. The system requires an initial investment of time in performing an adequate diagnostic waxing, but recoups that time in many clinical and laboratory procedures. The method has proved a valuable asset in fixed prosthodontic care. The technique can be expanded and combined with other techniques with a little imagination and artistic bent.

Denture Design↗
PubMed1975

Preceramic and postceramic solder joints.

This investigation evaluated preceramic and postceramic soldering procedures. Three gap spaces and two soldering methods were evaluated. Wider gaps produced stronger joints. The strongest joints were achieved by using wider gaps and the oven soldering technique. Very wide gaps (0.76 mm.) are not recommended because of possible distortion through excessive solder shrinkage. However, in practice, many solder joints exceed the 0.31 mm. recommended minimum; these joints will not show decreased strength.

Ceramics↗