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PubMed2003

The Umgeni bridge, a resin bonded pontic using a preformed fibre post an aesthetic procedure of low biological and fiscal cost.

A missing anterior tooth or open embrasures destroys the aesthetics of a smile. The replacement of a missing anterior tooth is one of the most rewarding and challenging aspects of restorative dentistry. There are a number of techniques to do this, however, most involve the use of a technician, which means additional cost to the patient and multiple visits. In today's financial climate with practice expenses climbing and medical aid remuneration dwindling, one must seek methods to reduce costs and provide patients with more affordable dentistry. In addition, in crisis situations such as the traumatic loss of a tooth an immediate replacement technique albeit temporary is necessary. To replace a missing anterior tooth directly and immediately presents a rewarding challenge to the clinician. The Umgeni bridge named after the river that flows on the north side of Durban, is particularly useful in replacing congenitally missing laterals after completion of orthodontic treatment in the case of congenitally missing laterals and cleft palates.

Acid Etching, Dental↗
PubMedDate not supplied

Ceramic restorations of anterior teeth without proximal reduction: a case report.

The primary advantage of using all-ceramic restorations is to reproduce a color and translucency close to those of the natural tooth. Additionally, it is anticipated that the use of an adhesion technique will allow a ceramic restoration without removing tooth structure in some patients. This case report describes the use of proximally bonded ceramic restorations for the closure of an anterior diastema without proximal tooth reduction. A silane coupling agent and a resin cement were used for bonding. The diastema was close with the ceramic restorations, which provided a natural appearance of the teeth. It was concluded that ceramic restorations without proximal tooth reduction was effective in improving esthetics, if the case was properly selected.

Adult↗
PubMed2003

[Analysis the effect on the stress of root canal wall of pulpless teeth by different degree of root canal preparation].

OBJECTIVE: To analyze the stress variations of wall of root canal of pulpless teeth that resulted from different diameters of root canal. METHODS: On the basis of the finite-element model of the mandibular first molar that modified by routine, diameter of root canal was modified and enlarged so as to the diameter of root canal was 1/3 and 1/2 of root diameter, then modified models were loaded and the maximal stress of each part of teeth and wall of root canal was calculated. RESULTS: The results revealed that enlargement of root canal diameter will bring on increase of stress of root canal wall at the orifice and coronal 1/3. The stress difference of lateral loading was greater than that of vertical loading. CONCLUSION: The principle of root canal preparation should be infected material removed and good shape of root canal gained. Over-preparation is unnecessary and harmful.

Dental Pulp Cavity↗
PubMed2003

The use of lasers in dentistry: principles of operation and clinical applications.

This article describes the principles of laser operation and the clinical application of laser technology in the different fields of dentistry. It discusses the use of the Er:YAG laser in restorative dentistry, pediatric dentistry, and periodontics, as well as the introduction of a new side-firing spiral tip for efficient cleaning of the root canal system by means of lateral laser irradiation. Although the Er:YAG laser is used mostly on enamel and dentin, the gingival depigmentation procedure using this laser also is described. Clinical applications of the CO2 and diode lasers on soft tissues, particularly in the fields of oral and maxillofacial surgery and perodontics, are explained. Because teeth whitening for esthetic reasons has gained increasing popularity in dentistry, the application of diode lasers for this purpose is discussed. All the dental laser procedures described in this article are conducted at the Hebrew University-Hadassah School of Dental Medicine and are further investigated in various clinical research projects.

Child↗