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At least 163 records · Page 9Linked to original sources
PubMed1992

Salivary secretion and denture retention.

Correlations between the retention of complete dentures and flow rates of the palatal and parotid glands were studied in 86 patients. The determination of secretion rates and forces of the forward leverage leading to a dislocation of the dentures showed a narrow correlation between the secretion of palatal glands and the retention of maxillary dentures. The retention of mandibular complete dentures is adversely influenced by the secretion rate of minor salivary glands. However, there is no correlation between the flow rate of parotid saliva and the retention of either denture. In addition, the medicinal stimulation of salivation showed that an increase of mucus secretion induced an improved retention of maxillary complete dentures.

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PubMed1992

Reinforcement of complete denture bases with continuous high performance polyethylene fibers.

Clinical literature details the causes for deformation and failure of acrylic resin complete denture bases. These findings are used to select patterns of high performance polyethylene fiber reinforcement that would best use the properties of the material and improve the mechanical behavior of the prostheses. A technique is described for making reinforced maxillary and mandibular bases with the fibers placed as suggested by the analysis. Microscopic observations of cross sections of reinforced bases revealed good fiber/resin integration and polish.

Composite Resins↗
PubMed1993

Maxillary bone resorption in patients with mandibular implant-supported overdentures or fixed prostheses.

For several years, implant-supported overdentures have been used with excellent results in rehabilitation of the edentulous mandible. The effect on the antagonistic jaw bone resorption however, has not yet been evaluated. The aim of this study was to examine on orthopantomograms the anterior and posterior maxillary ridge resorption in three groups of patients with different mandibular prosthetic reconstructions: (1) overdentures supported by two implants, (2) fixed prostheses supported by four to six implants, and (3) complete dentures. The results indicated a more pronounced annual bone resorption in complete denture wearers compared to patients with implant-supported overdentures. A limited but continuing bone resorption was observed for the patients with implant-supported overdentures, and a slightly higher annual bone resorption occurred in the implant-supported fixed prosthesis group.

Adult↗
PubMed1975

Pleasants' disease.

Explore the source record for details and available documents.

Alveolar Process↗
PubMed1985

The fracture topography of acrylic dentures broken in service.

The fracture surfaces of full dentures that failed in service, and others broken under controlled conditions, have been examined using scanning electron microscopy. The results allow the direction of crack propagation to be deduced and indicate that brittle impact is the predominant mode of fracture. Improvements in the strength of the denture tooth/denture base bond may be the most effective means of achieving an increase in the strength of full dentures.

Acrylic Resins↗
PubMed1995

Oral findings in elderly nursing home residents in selected countries: quality of and satisfaction with complete dentures.

A total of 249 complete denture wearers were examined from a geriatric population of 610 patients in seven institutions in four different countries. The evaluation of denture quality was made by the patients' opinions and the examiners rankings with a questionnaire on interocclusal distance, occlusal function, extension, stability, comfort, and esthetics of the dentures. At each of the surveyed institutions, the patients consistently considered their dentures better than did the examiners and the maxillary dentures were rated better that the mandibular dentures by the clinicians and by the patients.

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PubMed1995

Oral findings in elderly nursing home residents in selected countries: oral hygiene conditions and plaque accumulation on denture surfaces.

Many removable-denture wearers do not keep their prostheses clean. One result of poor hygiene is the accumulation of plaque and/or food debris on the denture surfaces, the oral tissues, the residual ridges, palate, cheeks, and tongue. In the study of the oral conditions of geriatric patients living in institutions, 610 patients were examined in seven old-age homes in four different countries: the United States, Peru, Argentina, and Israel.

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PubMed1982

Functional contouring of the palatal vault for improving speech with complete dentures.

A method for functionally modifying the contour of the palatal vault of maxillary complete dentures was described. This can be achieved at the trial stage of the denture construction and incorporated in the finished denture. Alternatively, the procedure can be accomplished at the time of insertion and the palatal vault modified with self-polymerizing acrylic resin. The immediate speech achieved by the modification is much more normal and eliminates the waiting and training period after denture insertion. Because the modification of the palatal vault is achieved by the functional contact of the tongue during articulation, the tongue does not have to adapt to the presence of the denture in order to achieve "normal speech." One of the advantages of the method is the ease with which it can be performed in a clinical setting and the minimal requirement of any extra material or equipment. Moreover, no special skills are needed to achieve successful results, which can be exceptionally gratifying.

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PubMed1997

A procedure for constructing dentures with interchangeable teeth.

Studies that compare different types of complete denture teeth have repeatedly emphasized the importance of standardizing all denture factors, except the type of teeth. Within-subject comparisons have also been recommended to avoid personal differences between patients. For optimum results, one denture should be constructed for each patient with interchangeable teeth. This article describes a simple and accurate procedure for constructing dentures with interchangeable posterior teeth.

Acrylic Resins↗
PubMed1997

Professional hygiene care, adjustments and complications of mandibular implant-retained overdentures: a three-year retrospective study.

PURPOSE: This report presents a retrospective evaluation of postinsertion care required by 104 edentulous patients with advanced mandibular bone loss. MATERIAL AND METHODS: The patients were treated with new maxillary dentures and mandibular overdentures retained by two implants with a single bar-clip attachment. Distinction was made between professional hygiene care, adjustments, and treatment of complications. The follow-up period after insertion of dentures was 3 years for all patients. RESULTS: Approximately a third of the patients needed professional hygiene care. The need for adjustments declined during the years of function. Complications were encountered in approximately a third of the patients. The majority of these were not related to the implants, but to the superstructure and both the maxillary and mandibular dentures. CONCLUSIONS: Many edentulous patients with advanced mandibular bone loss who were treated with mandibular implant-retained overdentures need professional hygiene care, adjustments, and treatment of complications.

Bone Resorption↗
PubMed1998

Linear dimensional change of heat-cured acrylic resin complete dentures after reline and rebase.

STATEMENT OF PROBLEM: Relining and rebasing of complete dentures are common procedures to improve the fit of the prostheses. After relining or rebasing, adjustments may be required because of dimensional change that occurs during reprocessing of the denture when new denture base material is polymerized. PURPOSE: This study analyzed the linear dimensional change of heat cured acrylic resin that occurs during reline and rebase procedures for complete dentures. MATERIAL AND METHODS: Twenty-two maxillary and mandibular complete denture bases with artificial teeth were saturated by immersion in distilled water at 37 degrees C +/- 1 degree C. Fine crosses were marked on the incisal edges of the central incisors and the supporting cusps of the second molar teeth. Distances between the marks were measured with a high resolution traveling microscope. Heat-cured acrylic resin was processed by a long curing cycle of 72 degrees C for 6.5 hours, then heated to 100 degrees C for over 30 minutes and kept at 100 degrees C for 1 hour. The relined or rebased denture was allowed to cool slowly in the water bath for 48 hours to reach ambient temperature. The reference-crosses were measured immediately after careful deflasking. RESULTS: In the relining procedure, all incisor-molar and intermolar distances exhibited shrinkage of 0.3%, despite different shapes of maxillary and mandibular dentures. Results of the rebasing procedure were similar to that of the reline expect that only 0.1% intermolar shrinkage was found on the maxillary denture. CONCLUSION: Shrinkage was approximately 0.15 mm for an interarch distance of 50 mm. This degree of change is both clinically undetectable and insignificant. Using this processing cycle for acrylic resin in reline or rebase procedures did not cause clinically significant dimensional changes to complete dentures.

Acrylic Resins↗
PubMed1999

Can dental prostheses influence vocal parameters?

STATEMENT OF THE PROBLEM: Alterations to the oral cavity caused by dental prostheses can affect speech articulation, whereas the influence of dental prostheses on the voice is unknown. For 1 patient, the fundamental frequency rose by up to 5 semitones during speech and his voice range was enlarged by up to 4 semitones when a thin denture was used instead of his normal denture. In this patient, intraoral needlepoint registration revealed a more rostral position of the mandible with the thin denture when compared with the normal denture. PURPOSE: This study evaluated the effects of such changes on phonation by varying the dentures of 20 subjects in line with those of the first patient. MATERIAL AND METHODS: The volumes of the test dentures were reduced and the vertical and horizontal dimensions of occlusion were varied. The influences of these changed dentures on speaking fundamental frequency, voice range (in semitones), and lowest and highest frequencies of the voice range were examined with a Homoth phonomat. RESULTS: A statistically significant influence of the different dentures on the investigated voice parameters was not proven; however, audible changes to the voice parameters for persons were documented. CONCLUSIONS: Variations of thickness and or volume of dentures and of the vertical and horizontal dimension of occlusion may result in unpredictable audible changes to the voice. Patients should be informed about possible effects of modified or new dentures on their voice.

Acrylic Resins↗
PubMed2003

Oral and general health-related quality of life with conventional and implant dentures.

UNLABELLED: Implant overdentures and conventional prostheses have been compared in several trials using a variety of functional and oral health-related quality of life (OHQOL) outcomes. In this paper, we describe the impact of implant overdentures on general and OHQOL in seniors. OBJECTIVES: To compare the oral health-related and general quality of life of seniors (aged 65-75 years) who received either mandibular implant overdentures or conventional dentures. METHODS: Sixty edentulous patients were recruited. Thirty received mandibular overdentures retained by two implants (IOD) and a conventional maxillary denture, the other 30 subjects received new maxillary and mandibular conventional complete dentures (CD). All completed the 20-item version of the Oral Health Impact Profile (OHIP-20) before treatment, then at two and 6 months after delivery of the dentures. The SF-36 general health questionnaire was completed at baseline and 6 months only. RESULTS: Pretreatment and 6-month data from 55 subjects were analyzed. Those who received the IODs had significantly better OHIP-20 total scores at 6 months. Results for IOD subjects were also superior in the functional limitation, physical pain, physical disability and psychological disability subscales. While no significant between group difference was found on the SF-36 health survey, significant pre-post-treatment differences within the IOD group were detected for the role emotional, vitality and the social function scales. CONCLUSIONS: Mandibular overdentures retained by two implants provide elderly patients with better OHQOL. General health-related quality of life improved in the implant group.

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