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At least 379 records · Page 21Linked to original sources
PubMedDate not supplied

Pressure distribution using tissue conditioners on simplified edentulous ridge models. Part 1: The influence of the height of the residual ridge.

This study was conducted to measure the changes of pressure distribution over time on the denture-bearing mucosal surface resulting from relining the intaglio surface of dentures with tissue conditioners. Pressure sensors of electrostatic capacitance variation were used to detect changes on three models of different residual mandibular ridge height. It is suggested that the shrinkage of tissue conditioners influences the dimensional accuracy of a dynamic impression technique.

Alveolar Bone Loss↗
PubMed1995

Fixed provisional restorations for extended prosthodontic treatment.

During extensive and extended prosthodontic treatment, there is need for a durable esthetic fixed provisional restoration that can be easily modified as treatment is completed and that is cost-effective. The needed strength of provisional restorations can be underestimated, and the management of complex treatment is then more difficult and the prosthetic results less predictable. Knowledge of the criteria for treatment restorations and the adequacies of their construction is essential for the prevention of catastrophic failures, patient management problems, and compromised results. Many times in complex prosthodontic treatment, changes are needed in esthetics, the plane of occlusion, incisal edge position, lip support, and type of occlusion, or the soft and/or hard tissues need to be altered or grafted surgically. In addition, after first- and second-stage implant surgery and extractions, there is a need for immediate tooth replacement with extended time between prosthodontic treatments. These prosthodontic changes and challenges can be addressed with reinforced acrylic provisional restorations that are adequately cemented and retained during the interim stage of healing and treatment. In addition, the provisional restoration should serve as a guide for the final restoration while esthetics and phonetics are evaluated for patient acceptance. This article describes the materials used with an indirect technique for fabrication of an extended-treatment acrylic provisional restoration that uses an internal cast metal support system for strength. This support system consists of metal bands or copings with extensions into edentulous areas and that have been opaqued to neutralize the metallic color. A matrix of vinyl polysiloxane made from the diagnostic wax-up simplifies construction of the acrylic, resulting in a strong, ridged, yet esthetic result.

Acrylic Resins↗
PubMedDate not supplied

Immediate loading of threaded implants at stage 1 surgery in edentulous arches: ten consecutive case reports with 1- to 5-year data.

Immediate loading of threaded implants with a fixed provisional restoration at stage 1 surgery was evaluated in 10 consecutive patients. The patients selected had to be completely edentulous and have adequate bone for a minimum of 10-mm-long implants. A minimum of 10 implants were placed in each patient's arch. A minimum of five implants were submerged initially for medicolegal reasons and allowed to heal without loading. The remaining implants were loaded the day of stage 1 surgery. Once the provisional restoration was relined, it was cemented or screw retained. A total of 107 implants were placed in these 10 patients; 6 had them placed in the mandible, and 4 in the maxilla. Six patients were treated with Nobel Biocare implants, one with ITI Bonefit implants, two with Astra Tech TiOblast implants, and one with a 31 implant. Sixty-seven of 69 implants that were loaded integrated, and 37 of 38 submerged implants integrated. All 10 patients have been restored with a definitive prosthesis, and all had a fixed provisional prosthesis from stage 1 surgery. The results of this study indicate that immediate loading of multiple implants rigidly splinted around a completely edentulous arch can be a viable treatment modality.

Biocompatible Materials↗
PubMedDate not supplied

Ten-year follow-up study of conical crown-retained dentures.

This study reports the results of a long-term evaluation of conical crown-retained dentures. One hundred fifty-two restorations that had been in place for over 10 years were analyzed. Restorations were divided according to the Kennedy classification. Abutment and periodontal health, occlusion, retention, and frequency of relining and repair were among the factors evaluated. Good prognoses of removable partial dentures were shown in Kennedy Classes I, II, and III arches. However, some of the restorations placed on only a few remaining abutments showed rather unfavorable situations with almost all of the factors evaluated.

Crowns↗
PubMedDate not supplied

Denture treatment needs of an overdenture population.

Cross-sectional and longitudinal studies have identified that persons wearing overdentures require regular care and maintenance of their dentures and their remaining dentition. This paper reports on a longitudinal study of the denture treatment needs of 284 dentures placed in 254 patients seen over a period of 12 years. At placement of the overdentures, baseline measurements and photographs were made by a single examiner. These measurements included evaluation of the restorations, abutment height above the gingival margin, periodontal probing depths, and oral hygiene. Denture status was evaluated by examining stability, retention, the integrity of the denture bases, and the relationship of the teeth in centric occlusion. Denture hygiene was also assessed. Based upon this examination, the subjects' denture treatment needs were determined. The majority of overdentures were well tolerated, and in general the patients were satisfied with their dentures. The most common denture treatment need was cleaning, followed by adjustment of the denture bases. Relining was a more common problem in the mandibular arch than in the maxillae. The need for occlusal adjustment did not seem to be a problem after the fifth year, but this might have been because of replacement of worn teeth or dentures. The majority of denture repairs were necessitated before the sixth year. Patients who received immediate dentures did not have greater treatment needs. Looseness of the dentures was the primary complaint, followed by sore teeth and denture-bearing tissues. In spite of their complaints, the great majority of the patients were satisfied with their overdentures.

Adolescent↗
PubMed1997

Home relines and residual ridge resorption.

Two cases of patients who have relined their complete dentures with home-applied materials in an attempt to improve the denture stability are discussed. The resultant damage to the residual tissues is described. A review of the literature on the effects of home relines leads to suggestions for the regular review of patients who wear complete dentures.

Denture Rebasing↗
PubMed1990

[Direct rebasing of temporary crowns in the fixed denture. An experimental assessment of the increase in heat at the pulp cavity level].

Self-curing resins are generally used to directly temporary prostheses on the crown abutments. This technique enables the operator to obtain a better marginal adaptation of the temporary prosthesis. The risk of such a procedure is the inflammation of the pulp due to the exothermic polymerization reaction of self-curing resins. The authors suggest experimentally evaluating the rate of thermic increase within the pulp cavity of an extracted tooth while directly relining a temporary crown.

Composite Resins↗
PubMed1993

Microwave processing for denture relines, repairs, and rebases.

The microwave processing procedure has been shown to be an efficient and accurate method of polymerizing poly(methyl methacrylate) resin for the fabrication of dentures. This article describes procedures to expand the uses of the microwave technique. With standard laboratory procedures, the microwave technique can improve and simplify denture relines, repairs, and rebasing of partial dentures.

Denture Rebasing↗
PubMed1991

Evaluation of accuracy of the wash impression technique to rebase and replace the resilient part of a soft-lined denture.

The dimensional inaccuracies that might be introduced during a wash impression technique within a heat-cured acrylic resin tray lined with a silicone resilient denture base material were investigated with the use of an electronic digitizer. Casts were poured from impressions of a machined metal die using a light- and heavy-bodied addition silicone in the soft-lined tray and compared with casts poured from impressions made in a hard-based tray and with the master die itself. The dimensions of the casts poured from the heavy-bodied impression in the soft-lined trays were significantly different from those poured from impressions in the hard-based tray when compared with the metal die. Those produced from the light-bodied material showed no statistically significant dimensional difference.

Acrylic Resins↗