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At least 667 records · Page 37Linked to original sources
PubMedDate not supplied

Comparison of 10% carbamide peroxide and sodium perborate for intracoronal bleaching.

The purpose of this study was to compare 10% carbamide peroxide to the combination of sodium perborate and water as intracoronal bleaching agents. Forty-four extracted teeth were discolored in vitro. Bleaching agents were placed intracoronally to the level of the cemento-enamel junction for 12 days; solutions were replaced after four and eight days. Standardized slides were used to rank color changes; a colorimeter was used to quantify color change. After 12 days, 65% of the discolored teeth in the 10% carbamide peroxide group and 67% of the discolored teeth in the sodium perborate group had lightened to their original shade or lighter. While there was no statistical difference between the two treatments, sodium perborate was easier to use.

Borates↗
PubMedDate not supplied

Replacement of a tooth with a fiber-reinforced direct bonded restoration.

Today's methods and materials for tooth replacement are multiple and varied. Modern materials now allow for highly conservative abutment preparations that can retain bonded single tooth replacement fixed prostheses. A case report is presented in which fiber reinforced with composite resin was used for placement of a three-unit fixed long-term provisional restoration, providing fracture resistance while achieving an esthetically pleasing, durable restoration.

Aged↗
PubMed2000

Direct pulp capping with a dentin adhesive resin system in children's permanent teeth after traumatic injuries: case reports.

Traumatic injuries in the permanent teeth of children and adolescents are one of the most frequent causes of dental treatment. The article presents the use of an enamel and dentin adhesive resin system, Syntac, and resin composite materials, Tetric and Variolink, as materials of choice for direct pulp capping after traumatic pulpal exposure (Ellis Class III). Exposed pulp in 10 patients was covered with Syntac and then Tetric and Variolink after etching of dental tissues with phosphoric acid. The follow-up period was from 12 to 48 months. In 1 patient, the treatment was a failure. In the remaining 9 patients, no signs or symptoms of pulpal inflammation or necrosis were observed during the clinical examination.

Acid Etching, Dental↗
PubMed2000

Intrusion injuries of primary incisors. Part III: Effects on the permanent successors.

Intrusion injuries of the primary dentition are highly associated with developmental disturbances of their successor teeth. The age of the child at the time of injury, the direction and severity of the intrusion, and the presence of alveolar bone fracture are important variables influencing the effect of primary tooth intrusion on the developing permanent germ. The developmental defects of the permanent successor tooth range from mild alteration in enamel mineralization to severe sequestration of the developing germ. This article will review the developmental anomalies of the permanent incisors induced by intrusion injuries of their predecessors.

Age Factors↗
PubMedDate not supplied

Impaired dentofacial development after radiotherapy of a non-Hodgkin lymphoma: report of case.

Since the advances in therapy of childhood malignancies have improved life expectancy attention is now increasingly focused on the long-term effects of antineoplastic therapy. Developmental abnormalities due to antineoplastic therapy have been claimed to preferentially occur in children treated before the age of six years. This report of a case demonstrates severe developmental disturbances following radiotherapy of a cervical non-Hodgkin lymphoma at the age of eight years. The morphological changes included microdontia, root shortening, blunting and thinning as well as mandibular hypoplasia.

Adult↗
PubMed2000

Trauma to the primary and young permanent dentitions.

It is the responsibility of the dentist to stay current on the latest techniques available to treat traumatic injuries. The charts included provide most of the potential emergency treatment possibilities, recommended follow-up treatment, and final treatment outcomes essential to providing the best care for our child patients. It is also the responsibility of the dentist to use evidence-based research when adopting treatment protocols. It is not appropriate to use anecdotal or single case studies as a basis for adopting treatment protocols. It is very difficult in this area of trauma to come up with good scientific research with adequate sample sizes and long-term data. Dr. J.O. Andreasen has excellent compiled long-term research on trauma. His books, Essentials of Traumatic Injuries to the Teeth and An Atlas of Replantation and Transplantation of Teeth are two very good books for any clinical practice.

Child↗
PubMedDate not supplied

Unusual impaction of inverted primary incisor: report of case.

A tooth that fails to erupt into a normal functional position by the time it normally should is considered impacted. Impactions of primary teeth are extremely rare, but when it does occur it usually involves the first and second molar. The purpose of this article is to present a case of a four-year-old patient with an impaction of an inverted primary mandibular incisor. On the basis of the patient's family history, the case might be considered as microform of ectodermal dysplasia.

Child, Preschool↗
PubMed2000

Altered passive eruption.

Biologic contributions to the smile play an important role in esthetics. The impact of the gingival complex on the esthetic qualities of a smile are significant, and both patients and dentists are developing a greater appreciation for the impact of gingiva on the beauty of a smile. Historically, the focus of periodontal therapy has been on managing patients with longer-appearing teeth secondary to attachment loss through pathology or as a result of periodontal surgery. Nevertheless, early diagnosis and treatment, as well as modern techniques and materials, have helped periodontology evolve to a point where such problems occur less frequently.

Epithelial Attachment↗
PubMedDate not supplied

Aesthetic posts and cores for metal-free restoration of endodontically treated teeth.

Utilization of contemporary post and core systems has facilitated the aesthetic restoration of endodontically treated teeth. Light transmission and biocompatibility have been enhanced by the introduction of metal-free post systems. The periodontal and endodontic status, root length, and histological structure of the devitalized teeth must be considered in order to achieve successful restoration following endodontic treatment. This article presents various restorative criteria for the aesthetic placement and buildup of post and core materials, as well as the preservation of maximum coronal and root structure.

Biocompatible Materials↗
PubMed2001

Tongue piercing: a restorative perspective.

The implication of a traumatic injury to a permanent molar tooth as a complication by tongue piercing with ornamental jewelry is reported. An appropriate restorative management of the fractured tooth is described. The dentist's role in prevention and treatment of unfavorable complications is outlined. The rationales for selection of specific treatment modalities, in view of the degree of damage to hard dental tissues, are discussed. The range of hard tissue injuries resulting from tongue jewelry varies from a simple crack propagating into the enamel to a fractured tooth. A variety of factors must be considered before employing the available restorative methods.

Adult↗
PubMedDate not supplied

Amalgam--Resurrection and redemption. Part 1: the clinical and legal mythology of anti-amalgam.

Dental amalgam has come under attack for its allegedly poor physical properties and clinical performance in addition to its poor appearance. It has been claimed that the American Dental Association has a hidden agenda to protect amalgam and that other countries have banned its use. A literature search revealed that the vast majority of amalgam restorations do not cause fractured cusps or have recurrent caries. Most amalgam restorations have been shown to last longer than resin composite restorations. In addition, the materials and techniques involved in amalgam restorations have vastly improved in recent years. Like resin composite restorations, amalgam restorations can often be repaired. The American Dental Association has no vested interest in protecting amalgam. The use of amalgam has not been banned in any country in the European Union. According to the latest scientific information available, dental amalgam is a remarkably durable and long-lasting restorative material. Although its appearance is unesthetic, its clinical performance and effectiveness are unsurpassed by those of resin composite.

American Dental Association↗
PubMedDate not supplied

Buonocore memorial lecture. Adhesive dentistry applied to the treatment of traumatic dental injuries.

Dental adhesive techniques have led to a significant simplification of the immediate and definitive treatment of traumatic dental injuries. Composite restoration of fractured teeth, bonding of tooth fragments, the use of laminate veneers or porcelain onlays and resin retained bridges are some of the ways adhesive techniques are used to treat fractured teeth. Furthermore, splinting of luxated teeth almost entirely relies on the combination of adhesion and a flexible resin which simulates the mobility of a normal periodontal ligament during the healing period. The internal strengthening of immature root-filled teeth with composite using an adhesive technique may possibly prevent late root fractures caused by weakening of the tooth structure resulting from endodontic procedures. Finally, the adhesive principle using a retro-seal with composite after apicoectomy significantly increases the healing rate and healing mode.

Apicoectomy↗
PubMedDate not supplied

In vitro comparison of cuspal fracture resistances of posterior teeth restored with various adhesive restorations.

PURPOSE: This study compared the cuspal fracture resistances of posterior teeth restored with five different adhesive restorations. MATERIALS AND METHODS: Eighty-four sound human molars were included in this study. Sample molars were divided into seven groups. The first five groups received mesio-occlusodistal cavity preparations and were restored with (1) amalgam combined with urethane dimethacrylate cement, (2) posterior composite, (3) direct composite inlay, (4) cast-metal inlay, and (5) complete ceramic inlay. The sixth and seventh groups were introduced in the study as controls. Samples of group 6 were prepared but were tested without restoration (prepared-only group). Samples of group 7 were intact teeth and were tested as unprepared. All samples were loaded axially until failure. RESULTS: While the unprepared teeth had a significantly higher resistance than all other groups, the prepared-only teeth were the weakest. No significant differences were found in resistance to cuspal fracture among the restoration groups. CONCLUSION: The difference between the mean cuspal fracture resistance of the unprepared and prepared-only groups was statistically significant. Restoration groups were stronger than the prepared-only group. However, differences between the restoration groups were insignificant.

Adult↗
PubMed2001

[Comparative analysis of results of mathematical simulation of stressed deformed status of pin dentures of different design].

A computer study of 99 types of mathematical models of teeth armed with stump pin insertions widely used in dentistry (group 1--anchor pins and group 2--cast pin insertions suggested by the authors). Tooth models differed by shape, size, and properties of the design material. The shape and parameters of stump pin insertion were proven to be more significant than the properties of design material. The choice of pin design is determined by the clinical situation, topography and anatomy of tooth crown destruction, and maxillodental disease.

Computer Simulation↗
PubMedDate not supplied

Fracture resistance of teeth restored with the bonded amalgam technique.

This study evaluated the fracture resistance of maxillary premolars with MOD Class II cavity preparations restored with silver amalgam (G1), Scotchbond Multi Purpose Plus and silver amalgam (G2) and Panavia F and silver amalgam (G3). After the restorations were made, the specimens were stored at 37 degrees C for 24 hours at 100% humidity and submitted to the compression test. Statistical analysis of the data (ANOVA and Tukey Test) revealed no significant differences among the three groups that were studied.

Analysis of Variance↗