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At least 1,225 records · Page 68Linked to original sources
PubMed1984

Gingival contour and clinical crown length: their effect on the esthetic appearance of maxillary anterior teeth.

Fractured, congenitally missing, or avulsed maxillary incisors can often jeopardize the esthetic appearance of the remaining maxillary anterior teeth after orthodontic treatment. In many cases the unesthetic appearance is related to the irregular clinical crown lengths of either the fractured teeth or those that have been substituted for the missing teeth. The results of five cases with either fractured or traumatically avulsed central incisors are reported. Selective tooth intrusion and restorative techniques were used during the finishing stages of orthodontic treatment to improve the final esthetic result. The advantages and disadvantages of the intrusion technique are discussed.

Adolescent↗
PubMed1977

The acid-etch class III composite resin restoration.

The acid-etch systems have become a familiar part of the dentist's armamentarium for achieving retention in the treatment of major esthetic problems in anterior teeth. They have another advantage, however, that has not been fully utilized. By combining the acid-etch technique with conventional cavity preparations such as the Class III, the common problems associated with microleakage can be greatly reduced and composite resin restorations can be placed with better esthetic results and greater longevity.

Acid Etching, Dental↗
PubMed1986

Glass ionomer-microfil technique for restoring cervical lesions.

The technique described has been used with good success. Failures have been negligible and may be attributed to poor technique of mixing of the ionomer, since it is difficult to completely standardize procedures. The advantages are caries resistance, bonding with minimal preparation, and pulpal protection while providing improved esthetics (Fig. 2).

Composite Resins↗
PubMed1988

An evaluation of etiologic factors in 382 patients treated in a postgraduate endodontic program.

A survey was completed to determine and to evaluate the reason for endodontic treatment performed by endodontic residents at the Baltimore College of Dental Surgery, University of Maryland at Baltimore. On the basis of patient data and the reasons for endodontic treatment, as stated by the treating residents, the results showed that necrotic pulp and irreversible pulpitis were the most frequent reasons for endodontic therapy. Other reasons for treatment included restorative considerations, retreatment, and trauma. The majority of cases involved posterior teeth, and the average age of patients was 40.0 years. The frequency by arch demonstrated approximately equal distribution between maxillary (54.8%) and mandibular (45.2%) teeth. A total of 224 (58.6%) of the 382 patients surveyed had preoperative pain.

Adolescent↗
PubMed1989

The teaching of posterior composites: views of recent UK graduates.

The views of recent UK graduates have been surveyed to determine the extent and adequacy of the teaching they received as undergraduates in respect of posterior composites. It is concluded that most recent graduates believe that they acquired sufficient knowledge of posterior composites at dental school, but that they would benefit from attendance at hands-on postgraduate courses on these materials.

Bicuspid↗
PubMed1989

A posterior composite teaching programme for the postgraduate.

It is suggested that there are a number of gaps to be bridged in respect of educational aspects of posterior composites and that for the practising dentists such gaps can be best bridged by means of hands-on courses. Details of the nature and content of hands-on courses considered to provide practitioners with essential information and experience of posterior composites are presented.

Bicuspid↗
PubMed1989

A posterior composite teaching programme for the undergraduate.

The development and existing arrangements in respect of the undergraduate teaching programme for posterior composites at the University of North Carolina School of Dentistry are reviewed. The importance of a unified departmental and school policy, associated clinical research activities and continuing education in relation to undergraduate teaching of posterior composites is stressed.

Bicuspid↗
PubMed1992

Dental biomechanics and the dental curriculum.

Attention is drawn to the numerous biomechanical concepts which provide the scientific basis for the many precepts taught in the various branches of clinical dentistry. It is suggested that dental biomechanics should logically be a subject area in its own right and that a practical way to achieve this would be for it to be gradually incorporated into the allied and complementary subject of dental materials science.

Biomechanical Phenomena↗
PubMed1993

Three-year follow-up of five posterior composites: in vivo wear.

The wear of five posterior composites at occlusal contact areas (OCA) and contact free occlusal areas (CFOA) was evaluated in Class II cavities over a 3-year period with an accurate 3D-measuring technique. A clinical evaluation was also performed. The ultrafine compact-filled composites (Willems et al., 1992) showed acceptable OCA-wear rates ranging from 110 to 149 microns after 3 years. This is very similar to the OCA-wear rate of human enamel on molars, which is about 122 microns after 3 years. The fine compact-filled composite had an unacceptable OCA-wear value of 242 microns after 3 years. The ultrafine midway-filled composite showed an exceptionally high CFOA-wear value of 151 microns after 3 years, which gave the impression of it being gradually washed out of the cavity. Clinically, 70% of the restorations made with the ultrafine midway-filled composite showed excellent colour match after 3 years. For most of the compact-filled composites slightly opaque fillings were noted and 63% of the restorations made with one of these materials were clearly opaque. It can be concluded that the investigated ultrafine compact-filled composites can be considered as amalgam alternatives as far as their wear resistance is concerned.

Adult↗
PubMed2006

Effect of in-office tooth bleaching on the microhardness of six dental esthetic restorative materials.

OBJECTIVES: The aim of this in vitro study was to evaluate the effect of the in-office bleaching technique on the microhardness of six dental esthetic restorative materials. METHODS: Four composite resins (a hybrid, a flowable, a micro-hybrid and a nano-hybrid), an ormocer and a ceramic were tested, after the use of an in-office bleaching product. Fourteen specimens of each composite and the ormocer were fabricated and randomly divided into two groups of seven samples each. One group was polished and the other group remained unpolished. For the ceramic, seven polished samples were fabricated. Two samples of each group were used as negative controls. The specimens were bleached for 15, 30 and 45min. Five Knoop microhardness measurements were made on each sample, for each of the following periods tested: before bleaching, after 15, 30 and 45min of bleaching, 24h and 1 month after the bleaching procedure. Data were analyzed by the repeated measures analysis of variance with three between factors and one within. RESULTS: The differences in the microhardness values between the bleached and the control samples for the composites and the ceramic, were not statistically significant (hybrid: p=0.264; flow: p=0.584; micro-hybrid: p=0.278; nano-hybrid: p=0.405; ceramic: p=0.819). For the ormocer, although bleaching did not have any significant effect on the unpolished samples (p=0.115), it caused an increase on microhardness of the polished samples. SIGNIFICANCE: Bleaching with 38% hydrogen peroxide does not reduce the microhardness of the restorative materials tested. Therefore, no replacement of restorations is required after bleaching.

Ceramics↗