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Change in dental treatment needs in an urban pediatric population, 1977 to 1987.

Decreasing caries activity in children has adversely affected the education programs in clinical pediatric dentistry. This paper presents a program designed to facilitate the educational requirements of undergraduate dental students as it meets the dental needs of an urban pediatric population in Kansas City, MO. Changes in dental treatment needs that have occurred in this population over the past decade are evaluated. Dental records of 760 children from four urban schools were examined; data from the dental records were categorized according to the type and number of operative procedures completed. Results indicated a significant decrease in the percentage of patients requiring simple or complex amalgams from 1977 to 1987. Similar decreases were noted in other operative procedures. However, comparisons between the proportion of patients requiring multiple operative procedures indicate less changes during the ten-year period. These results suggest that there is still a percentage of patients requiring substantial dental care as a result of dental caries.

Child↗
PubMed1989

[Development of electroforming apparatus for coronal restoration].

As dental technologies become highly developed, techniques have been more diversified. From as aspect of prosthodontic practice, both esthetic and functional requirements are emphasized for coronal restoration and consequently, these should be considered in the routine procedure. In fabrication of coronal restorations, metal, porcelain and resin are commonly used, and there exists the various disadvantages for metal cast method due to complicated processes by using different dental materials. Therefore, an electroforming apparatus was developed by us to replace the conventional procedure by a cathode rotary system. It was applied for coronal restorations to allow an electroforming directly on a working model. An experiment was successfully conducted to apply for a veneer crown on abutment tooth of upper central incisor on plaster model. The results were obtained as follows, 1. It was become possible to construct a metal framework by the electroforming. 2. Metal framework can be constructed on the same working model without a duplication of it. 3. The combined system for cathode rotation and liquid circulation could shorten the electroposition time, and allows a high current density extending to 50 A/dm2.

Dental Restoration, Permanent↗
PubMed1977

[Follow-up studies on 15-month-old adhesive fillings].

Clinically, 450 Adhesive Restorations have been reexamined 15 months after insertion. Several of these restorations were also evaluated by SEM. The principles of cavity preparation for adhesive fillings deviate from those postulated by G.V. Black. They aim at a micromethanical retention of the restorative material to the tooth structure. A considerable amount of sound tooth structure can be saved. The combination of cavity design with enamel conditioning and the use of a low viscosity sealant prior to the insertion of the composite (Caulk Nuva System) resulted in restorations showing no microleakage and a perfect marginal adaptation. Their retentive strength seems to be sufficient as well as the durability of their excellent marginal properties. Pulpal responses to the application of etching agents were avoided by covering the dentin with an acid resistant base. Splinting of teeth using a strictly adhesive method without cavity preparations failed in more than 50%. The high rate of composite discoloration (43%) was probably due to factors inherent in the restorative material itself.

Adhesiveness↗
PubMed1989

Changing trends of dental restorative materials.

Esthetic dentistry evolved through advancements in dental materials and techniques. This article cites these trends, particularly the adhesive systems such as dentin bonding agents and polyacrylic acid based materials. In particular, the expanding role of glass ionomer cements is explored with attention to the various formulations and manipulative factors that influence performance. Also, a classification system for composite resins is offered with suggestions for proper selection.

Acrylic Resins↗
PubMed1977

Correlation between preclinical and clinical grades.

This study indicated that grades for preclinical performance in the restorative laboratory were seldom predictive of the same student's performance in the clinic and should be used very carefully by promotions committees in evaluating a student's potential for success.

Clinical Competence↗
PubMed1989

[Current status of esthetic dentistry].

In aesthetic odontology with adhesive materials, a close liaison between manufacturers and dentists is a much-needed prerequisite. Now more than in the past, when restorations were done on nobler materials, techniques and procedures involving composite materials must be performed with extreme precision, since such techniques are very sensitive.

Composite Resins↗