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At least 649 records · Page 36Linked to original sources
PubMed2004

Interim restorations.

Interim restorations are a critical component of fixed prosthodontic treatment, biologically and biomechanically. Interim restoration serves an important diagnostic role as a functional and esthetic try-in and as a blueprint for the design of the definitive prosthesis. When selecting materials for any interim restoration, clinicians must consider physical properties, handling properties, patient acceptance, and material cost. Although no single material meets all the requirements and material classification alone of a given product is not a predictor of clinical performance, bis-acryl materials are typically best suited to single-unit restorations, and poly(methylmethacrylate) interim materials are generally ideal for multi-unit, complex, long-term, interim fixed prostheses. As with most dental procedures, the technique used for fabrication has a greater effect on the final result than the specific material chosen.

Biomechanical Phenomena↗
PubMed2004

Exotherm behavior of the polymer-based provisional crown and fixed partial denture materials.

OBJECTIVES: The objective of this in vitro study was to evaluate the exothermic reaction during polymerization of the polymer-based provisional crown and fixed partial denture materials. METHODS: Three dimethacrylate-based materials and one monomethacrylate-based material were selected. The specimens were pre-conditioned to 23 degrees C. Temperature changes of the materials during polymerization were recorded in a model test-cavity overlying a type K thermocouple. Peak temperature, time to reach peak temperature and total peak area were determined. The data were statistically analyzed using one-way ANOVA at a significance level of 0.05. RESULTS: All materials exhibited exotherm release ranging from 5.1 to 12.7 degrees C. Trim gave a peak temperature that was not significantly lower (p > 0.05) than those of Protemp 3 Garant and Luxatemp, but fast set Temphase showed a significantly higher (p < 0.05) peak temperature than the other materials. All materials showed no significant differences (p > 0.05) in the total peak area. Trim showed the slowest exotherm reaction; its time to reach the peak temperature was ca. 10 min after mixing, while ca. 2 min for the other materials. SIGNIFICANCE: The dimethacrylate-based materials (except for fast set Temphase) exhibited no significant differences in peak temperature and total peak area from the monomethacrylate-based material with slower exotherm reaction. A reformulation of the dimethacrylate-based materials could be envisaged to generate a material with a slightly slower setting and a reduced peak temperature.

Acrylic Resins↗
PubMed2004

Single tooth immediate provisional restoration of dental implants: technique and early results.

PURPOSE: Patients desire efficient restoration of missing teeth. Immediate provisionalization of implants at the time of placement can provide the patient with a tooth-like restoration. Our hypothesis is that preoperative fabrication of the implant abutment and provisional restoration can provide successful immediate provisionalization of implants, if specific diagnostic criteria are used for patient selection. PATIENTS AND METHODS: This hypothesis is evaluated by prospectively following 74 implants thus treated for 6 months to 2 years. A technique is presented to illustrate a simple and reliable method to provisionally restore a single tooth restoration. The method involves preoperative placement of an implant analog into a model, preparation of the abutment on the model, and fabrication of a provisional crown out of occlusion. At the time of surgery, the implant is placed according to the prescription of the restorative dentist, the surgeon places the abutment and provisional crown, and the final restoration is fabricated after the implant integrates. RESULTS: Seventy of 74 (94.6%) restorations have been successful with up to 2-year follow-up, which is similar to single tooth implants treated using a 2-stage protocol. CONCLUSIONS: Single tooth immediate provisionalization implants are effective techniques when specific diagnostic criteria are used.

Alveolar Process↗
PubMed2005

Computer-guided implant placement with immediate provisionalization: a case report.

Placement of dental implants in the esthetic zone is challenging for clinicians because of patients exacting esthetic demands and preexisting anatomy. This article presents an option for highly demanding surgical cases with the use of computer-guided implant placement and immediate provisionalization. This technique optimizes implant placement and soft tissue esthetics while providing the patient with an immediate fixed restoration.

Adult↗
PubMed2005

Indications for splinting implant restorations.

PURPOSE: The purpose of this article was to review the literature concerning the need to splint implants together when restoring them with a provisional restoration immediately after implant placement. METHODS: The literature is reviewed concerning the rationale for splinting teeth and reports concerning the efficacy of splinting implants together. Based on this team's experience with a prospective series of consecutive 2 to 5 unit provisionalization cases, guidelines are included with case examples for understanding the technique. CONCLUSION: As long as canine guidance is present, and occlusion is stable, multiunit single quadrant restorations do not need to be splinted when provisionalized.

Dental Abutments↗
PubMed2005

Early clinical experience with a new one-piece implant system in single tooth sites.

PURPOSE: To evaluate the clinical efficacy of a new 1-piece implant in single tooth sites. MATERIALS AND METHODS: Early clinical results were evaluated through observation and collection of survival data for 45 1-piece Direct implants (Nobel Biocare, Yorba Linda, CA). Patients ranged in age from 19 to 54 years, of which 23 were women and 12 were men. Both anterior and posterior single tooth defects were treated, with the majority being in the maxillary anterior zone. Five of the 45 implants placed were in immediate extraction sites. Observation periods ranged from 2.5 to 32 months. RESULTS: One implant failure was detected over the observation period. It occurred in a maxillary lateral incisor site, and was placed and immediately loaded after tooth extraction. The overall success rate was 97.8%. CONCLUSION: Within the limited parameters of this study, it can be concluded that the 1-piece implant design can be used effectively as a basis for restoring single tooth defects. Longer observation periods, more detailed soft tissue analysis, and larger numbers of implants in varied arch sites will be required to establish definitive protocols for the use of this implant.

Adult↗
PubMed2005

Techniques to facilitate provisionalization of implant restorations.

PURPOSE: The aim of this article was to review current methods for immediate provisionalization of single unit implant restorations. METHODS: Four methods are discussed and illustrated in detail, including: preoperative preparation of an abutment and provisional crown using diagnostic models; abutment placement and modification at the time of implant placement; the use of 1-piece or non-prepable abutments; and methods of indexing. Material characteristics for indexing are presented to provide the clinician with an understanding of material handling in relation to accuracy of indexing. CONCLUSION: Depending on clinician and patient case specific criteria, immediate provisionalization of implant restorations can be performed in an efficient manner.

Dental Abutments↗
PubMed2005

Immediate fixed restoration of the edentulous maxilla after implant placement.

Immediate loading of the edentulous maxilla is possible when sufficient bone is available to provide primary stability of implants located in positions congruent with an ideal prosthesis. Treatment planning, implant placement with immediate provisionalization, and final prosthodontic rehabilitation are best integrated by a process that uses the immediate provisional prosthesis as a surgical and restorative guide. Designating the planned tooth position is a prerequisite step to the identification of possible implant positions. The cervical contours of the planned prosthesis are critical determinants of this relationship. Defining the planned tooth/residual alveolar bone relationship aids in selecting both the possible type of prosthesis and implant locations. When the treatment plan is transferred directly from the tomographic template to the surgical template to the conversion prosthesis used for immediate loading, the surgical and prosthodontic management of this procedure is well defined.

Dental Implantation, Endosseous↗
PubMed2005

Indexing and provisional restoration of single implants.

PURPOSE: The purpose of this article is to provide a review of provisional implant restorations and surgical indexing procedures for partially edentulous patients. MATERIALS AND METHODS: Case studies will be presented that illustrate the interim restoration of dental implants including stock healing abutments, premachined titanium abutments, resin polymer abutments, and acid etch composite resin pontics. Single stage, immediate, and immediate nonocclusal loading protocols will be illustrated. RESULTS: All of the implants illustrated in this report were clinically successful. CONCLUSION: Provisional restoration of implants is an important part of overall implant treatment for both esthetic and functional concerns. Implants may be loaded with functional occlusion at various time intervals postimplant placement depending on implant manufacturer, implant design, quality, and quantity of bone with high levels of implant survival.

Dental Abutments↗
PubMed2003

Laboratory-processed acrylic resin provisional restoration with cast metal substructure for immediately loaded implants.

Most methods of immediate loading of implants reported in the literature involve retrofitting a pre-existing denture to the implants. This article describes and illustrates clinical and laboratory procedures for immediate loading of implants in the edentulous mandible with the use of a laboratory-processed, provisional, screw-retained, implant-supported fixed complete denture that incorporates a cast metal reinforcement.

Dental Alloys↗
PubMed2004

Method for developing an optimal emergence profile using heat-polymerized provisional restorations for single-tooth implant-supported restorations.

This article describes a method for creating an improved emergence profile with single-tooth, implant-supported restorations. An easily trimmed silicone gingival substitute is used to allow polymerization of acrylic resin provisional restorations to achieve control of the emergence profile. Gingival trauma is minimized by eliminating intraoral use of monomer and minimizing surgical procedures. Provisional restorations can be assessed to ensure the contour is acceptable and the trimmed gingival substitute can be used to fabricate a similar profile in the definitive prosthesis. The provisional restorations may be used instead of standard prefabricated healing abutments to guide the healing contours of the peri-implant gingival tissue.

Acrylic Resins↗
PubMed2004

Repair of bis-acryl provisional restorations using flowable composite resin.

Provisional restorations provide interim coverage for prepared teeth while fixed definitive restorations are fabricated. Several types of autopolymerizing acrylic resins have been used for many years to fabricate provisional restorations. In recent years, bis-acryl resin composite material has gained popularity among clinicians for the direct fabrication of provisional fixed restorations. Occasionally, deficiencies may occur while fabricating a direct provisional restoration and require chairside repair. This article describes an effective procedure for the use of light-polymerized flowable composite resin for the intraoral repair of bis-acryl provisional restorations.

Cementation↗
PubMed2005

Effects of various finishing procedures on the staining of provisional restorative materials.

STATEMENT OF PROBLEM: The color stability of tooth-colored restorative materials for provisional restorations is of primary importance when provisional prostheses are worn long term. However, the effect of different polishing methods on the color difference of provisional restorative (PR) materials has not been completely clarified. PURPOSE: The purpose of this study was to investigate the effect of different polishing methods on color stability of 2- and 3-component autopolymerized bis-acrylic composites, a light polymerized composite, and a methyl methacrylate-based PR material upon exposure to a staining agent. Material and methods Sixty cylindrical specimens (15 x 2 mm) were prepared for each of bis-acryl composites (Protemp II and Luxatemp), a light-polymerized composite (Revotek LC), and a methyl methacrylate-based (TemDent) PR material by using a brass mold. The specimens were divided into 6 groups (n=10), and different polishing procedures were used, including pumice (P), diamond polishing paste (Dpp), polishing discs (Pd), and combinations of these. Unpolished specimens served as the control. The specimens were stored for 48 hours at 37 degrees C in a coffee solution. The color of all specimens was measured with a colorimeter (Minolta CR-300) before and after exposure, and color changes (DeltaE) were calculated. The data were analyzed with a 2-way analysis of variance, and mean values were compared by the Tukey Honestly Significant Difference test (alpha=.05). RESULTS: The provisional materials, surface polishing procedures, and interaction were significant (P <.05). In the light-polymerized composite group, the lowest color difference (DeltaE) was observed in Group P-Dpp (4.9) and Group P (5.3), which were not significantly different from each other. In the autopolymerized bis-acryl composites and the methyl methacrylate-based provisional materials, the lowest color difference (DeltaE) was observed in Group P-Dpp. The largest color difference for the light-polymerized and autopolymerized composites was observed in Group Pd-Dpp and Group Pd, which were not significantly different from each other. In the methyl methacrylate-based material group, the largest color difference was observed in Group Pd. When comparing the 4 different PR materials, the methyl methacrylate-based material group demonstrated statistically significantly less color change than the other provisional material tested. CONCLUSION: The methyl methacrylate-based PR material (TemDent) was found to be more color stable than the autopolymerized (Protemp II and Luxatemp) and light-polymerized (Revotek LC) composites tested. The use of diamond polishing paste after polishing with pumice significantly decreased the staining of methyl metacrylate and bis-acryl composites tested. The highest color-change values were obtained in the groups polished with polishing discs, which were found to be significantly different compared to values obtained with other polishing techniques.

Acrylic Resins↗
PubMed2005

Conversion of a removable partial denture to a transitional complete denture: a clinical report.

A procedure is described for conversion of an existing removable partial denture into a complete denture using autopolymerizing tooth-colored acrylic resin, acrylic resin denture repair material, and a clear matrix template. The shape, color, and position of the lost natural teeth may be duplicated in the transitional denture, minimizing the psychological concerns of the patient regarding esthetics and social impact. Because the patient is never without teeth, an appropriate healing time can occur before fabrication of the definitive prosthesis.

Dental Prosthesis Design↗