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Results for “Denture, Complete”

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At least 325 records · Page 18Linked to original sources

PubMed1992

The prevalence of Candida albicans in complete denture and removable partial denture wearers: a comparative study.

In this study, 60 complete denture wearers, 53 removable partial denture wearers and 50 dentate subjects were examined to determine the Candidal carrier state. The influence of local factors such as denture type, smoking habits and sex on Candidal carrier rate were investigated. Wearing complete or removable partial denture was determined as an important factor increasing Candidal carrier rate. Cigarette smoking is another factor which increases Candidal growth in complete denture and removable partial denture wearers. In contrast to denture wearers Candidal carrier rate was considerably less on dentate smokers. Candidal colonization rate was found to be higher on the dorsum of the tongue. This suggests that the tongue is the primary oral reservoir of Candida albicans in the mouth.

Adult↗

PubMedDate not supplied

[Influence of impressions' border formation on retention of lower complete dentures].

Examinations of the retention of lower individual trays without formation of borders and with borders shaped of wax for impressions have been carried out in 32 patients with toothless mandible. The retention of impressions and lower complete dentures has also been examined. The examinations have been demonstrated that formation of lower individual impression trays' borders increases the retention of lower complete denture. The formation of borders in the anterior region of sublingual fovea influences the retention of lower complete dentures most. Simultaneous formation of borders in the anterior regions of sublingual salcus and oral cavity vestibule ensures the greatest retention of the dentures. The retention of lower complete dentures shows positive correlations with the retentions of impression trays and impressions and that is why the estimation of the impression's retention of the toothless mandible should be done each time to determine the recommendations for the end of the procedure or performance of suitable corrections. Carrying lower complete dentures for 1-4 weeks doesn't influence the retention force of these dentures.

Dental Impression Technique↗

PubMed1998

The importance of occlusal balance in the control of complete dentures.

OBJECTIVE: The importance of occlusal balance to the control of complete dentures during function was assessed. METHODS AND MATERIALS: The complete dentures of five patients who were having difficulty controlling their prostheses were accurately duplicated. The artificial teeth were replaced with occlusally balanced teeth. No other changes were made. Patients were asked to report their experiences with the new dentures after 1 week, 3 weeks, and 6 weeks. RESULTS: By the end of 6 weeks, improvement in denture stability and eating comfort were reported by all patients. CONCLUSION: Improvements occurred when the occlusion was balanced, despite existing jaw relationship errors, fitting inaccuracies, and peripheral extension errors.

Dental Articulators↗

PubMed2003

Dimensional change in complete dentures fabricated by injection molding and microwave processing.

STATEMENT OF PROBLEM: Acrylic resin complete dentures undergo dimensional changes during polymerization. Techniques with injection molding and polymerization and microwave polymerization are reported to reduce these changes and thereby improve clinical fit. These dimensional changes need to be quantified. PURPOSE: The purpose of this study was to compare differences in dimensional changes of simulated maxillary complete dentures during polymerization and storage in water after injection molding and conventional polymerization, or microwave polymerization against a control of conventionally packed and polymerized simulated maxillary complete dentures. MATERIAL AND METHODS: Forty identical maxillary denture bases were prepared in dental wax with anatomic teeth. They were invested and the wax eliminated from the molds. Ten specimens each were randomly assigned to 1 of 4 groups. Group 1 was compression molded and conventionally polymerized; group 2 was injection molded and conventionally polymerized (Success); group 3 was injection molded and microwave polymerized (Acron MC); and group 4 was injection molded and microwave polymerized (Microbase). Intermolar width and changes in vertical dimension of occlusion, were determined after polymerization and after storage in water for 28 days. Measurements in triplicate were made between points scribed on the second molar teeth with a traveling microscope (accurate to 0.005 mm). Vertical dimension of occlusion was measured between points scribed on the upper and lower members of an articulator by use of an internal micrometer (accurate to 0.05 mm). Data were analyzed by use of a 1-way analysis of variance with Tukey post-hoc contrasts (P <.05). RESULTS: Polymerization contractions (intermolar widths) for each group were: group 1, -0.24%; group 2, -0.27%; group 3, -0.35%; and group 4, -0.37%. The Microbase specimens had greater shrinkage than conventionally polymerized specimens, but there were no significant differences between the groups. All injection methods had less postpolymerization increase in vertical dimension of occlusion (0.63 to 0.41 mm) than the conventional Trevalon control (0.74 mm), but only group 4 was significantly different (P<.004). After storage in water for 28 days, all specimens increased in vertical dimension of occlusion (0.10% to 0.16%) from polymerization techniques, but there were no significant differences between groups. CONCLUSION: Within the limitations of this study, injection molding resulted in a slightly less increase of vertical dimension of occlusion than conventional polymerization techniques, the difference being significant for Microbase compared with the conventional Trevalon control.

Acrylic Resins↗

PubMed1998

The prevalence of Candida albicans populations in the mouths of complete denture wearers.

Using imprint cultures, the prevalence of oral candidosis and the frequency of isolation of Candida albicans and its density in oral mucosal sites and denture surfaces was determined in 190 healthy dentate subjects and 230 complete denture wearers. Candida colonization was 36.8% and 78.3% in healthy dentate and complete denture wearers patients, respectively. In the healthy dentate subjects the tongue, palate and cheeks, and in complete denture wearers additionally the upper and lower dentures, were the most frequently and densely colonized oral sites. Oral carrier rate and density of C. albicans were both higher in the denture wearers diabetic group than in the control non-diabetic group. Smoking was associated with an increase in the frequency and density of the yeast in denture wearers. Attention to these predisposing factors could reduce the incidence of oral candidosis particularly in immunocompromised patients.

Adult↗

PubMed2003

[Clinical evaluation on effects of functional muscular equal pressure zone on complete denture].

OBJECTIVE: To study the clinical effect of the functional muscular equal pressure zone on complete denture. METHODS: Artificial teeth were arranged within the functional muscular equal pressure zone. With this technique 35 complete dentures were made to rehabilitate 35 edentulous patients whose alveolar bones were moderately or seriously absorbed. After three months' following up, the satisfaction of these patients were investigate. RESULTS: After prosthesis treatment, 35 patients enunciated well and the aesthetic effect was favorable. 89 percent of these patients satisfied the retention and the stability of the maxillary denture, and 78 percent satisfied the retention and the stability of the mandibular denture. 79.5 percent of these patients satisfied the mastication efficiency. CONCLUSION: With the technique, the complete denture is fairly stable in patient's mouth. The technique can enhance the denture's retention and improve the patient's mastication efficiency, especially to these whose alveolar bones are moderately or seriously absorbed. Clinically the technique is of high practical value to these edentulous patients who are difficult to be rehabilitated.

Aged↗

PubMed1990

Comparison of food particle distribution masticated by subjects wearing complete dentures and with natural teeth.

The sizes of soya particles masticated by 12 complete denture wearers and 10 subjects with natural dentition were directly measured by means of a graphic digitizer and computer, following a varied number of chewing strokes. It was found that the chewed particle size frequency distributions of the two groups tended to a state of normal logarithm distribution. Compared with the dentate subjects, the mean, 20th, 50th and 80th percentile of the particle sizes chewed by complete denture wearers were increased, whilst the distribution shapes were nearly identical. The results suggest that there are no qualitative differences in the manner in which the two groups break up food. Selection and breakage functions of complete denture wearers are decreased, and this could be related to the denture conditions and the change of oral state in such individuals.

Adult↗

PubMed1996

[A simplified theory of protrusive balanced occlusion in complete denture and its application].

Based the study of the theory of protrusive balanced occlusion in complete denture construction and clinical experience the author established a new simplified theory named "the three principle factors and three laws for protrusive balanced occlusion in complete denture" to guide us to arrange teeth for balanced occlusion in complete denture construction. Based this theory the phenomena of protrusive occlusal disharmony appeared in the process of teeth arrangement and denture insertion can be corrected easily.

Dental Occlusion, Balanced↗

PubMed2001

[Development and applications of a computer aided complete denture design system].

OBJECTIVE: The purpose of this study was to develop a practical CAD/CAM system with knowledge databases for complete denture. METHODS: A three-dimensional coordinate measuring machine (3DCMM) was used to collect three-dimensional information of edentulous models and bite plates and the mathematics model of complete denture was established using B-Spline method. This system was established by seting eight functional models: the measuring model, the converting data model, the constructing curve-surface model, the producing base and the editing model, the arranging artificial and the editing model, the outputting income model, the imitating dynamic model and the managing model. RESULTS: (1) The soft and hard system of a computer aided complete denture design (CACDD) was established, including 3DCMM, 8 functional models and databases. (2) A CACDD system and the three-dimensional demonstration were completed. CONCLUSION: This system lay down the foundation for setting up the computer aided complete denture design/manufacturing system.

Computer-Aided Design↗

PubMed1993

A retrospective study comparing duplication and conventionally made complete dentures for a group of elderly people.

The duplication technique is a well recognised method of replacing complete dentures. Advantages claimed for this technique are that patients adapt more easily to their new complete dentures and the numbers of treatment visits are reduced. The case notes of 100 patients were examined retrospectively, 50 of whom had had dentures constructed by undergraduates using a duplication technique and 50 with a conventional technique. In addition, a questionnaire was sent to the patients to obtain their views on the replacement dentures. The 'duplication group' required fewer visits for the delivery of the dentures, but there was no statistical difference between the numbers of post-insertion visits, for the two groups, needed to make the dentures comfortable. The only identifiable reason for selecting a duplication technique was the failure of construction of new dentures by a conventional method in 15 patients. Apart from this the two groups appeared remarkably similar when comparing age of dentures being replaced, period of edentulousness, number of previous complete dentures and medical histories. As judged by the questionnaire more patients in the duplication group continued to wear their new dentures compared to the conventional group.

Aged↗

PubMed1992

[A complete denture rebasing method in two appointments].

During rebase of the complete dentures, the denture bases are used as the trays for making border molding and final impression. Both open--mouth and closed-mouth impression methods are certainly expected to change the relationship between acrylic teeth and denture base after impression procedures. The upper denture usually shifts forward and downward, as a result, the occlusal relationship and esthetics are both damaged. The purpose of this article was to introduce an effective method for rebasing complete dentures. Through utilizing (1) the interridge distance, (2) the distance between the upper edentulous ridge and the occlusal surface of the lower acrylic teeth, and (3) the interocclusal records obtained immediately after each impression, the displacement of denture base can be corrected accurately. In addition, the original occlusion and esthetics are able to be preserved.

Denture Rebasing↗

PubMed2006

Rationale for choices of occlusal schemes for complete dentures supported by implants.

This review of occlusal considerations for implant-supported complete dentures reflects the majority opinion of authors according to clinical observations and research-documented evidence. Occlusal concepts are presented for the implant-supported complete dentures regarding analysis of loads applied to dental implants, location and number of implants, occlusal materials, and occlusal scheme.

Acrylic Resins↗

PubMed1999

Operator agreement in the use of a descriptive index of complete denture quality.

BACKGROUND AND DESIGN: No generally accepted method for classification of clinical quality of complete dentures exists. While various methods have been proposed, little effort has been made to test observer agreement. The purpose of this study was to test observer agreement in the clinical assessment of complete denture quality using a systematic classification. RESULTS: Fifty seven (57) complete denture-wearing patients were examined on two occasions separated by two weeks. Observer agreement was measured using Cohen's? (kappa). High levels of observer agreement were found for upper and lower retention and stability and for quality of retruded jaw relationship. CONCLUSION: High levels of operator agreement were found for a method for classification of clinical quality of complete dentures suggesting that the classification may be useful as a research tool.

Denture Retention↗

PubMed1977

The relationship of vertical dimension of atypical swallowing with complete dentures.

A number of subjects were studied cineflourographically during swallowing, and their vertical dimensions of occlusion were clinically evaluated. The subjects who had reduced vertical dimensions of occlusion were older than those with normal vertical dimensions, their dentures were older, their total years with complete dentures were more, and the tendency to swallow without opposing tooth contact was greater. The cumulative evidence indicates that such aberrant muscle activity might contribute to the regressive changes found in complete denture wearers.

Aged↗

PubMed2005

Does the nature of the definitive impression material influence the outcome of (mandibular) complete dentures?

The effects of impression materials on the outcome of complete dentures are poorly understood. This double-blind cross-over randomized controlled trial investigated eleven adult edentulous patients. Each received a maxillary denture and three mandibular dentures (which differed only in the three materials used to record the definitive impressions). The three mandibular dentures were given in a random order. Patients' opinions of each denture were recorded using a Linear Analogue Scale. There was a statistically-significant difference between the outcome of the dentures constructed when zinc-oxide eugenol was used, this material being least favoured (p < 0.001). It would therefore appear that care should be exercised when selecting impression materials when constructing mandibular complete dentures.

Aged↗

PubMedDate not supplied

[Evaluation of a method for determination of the occlusal plane in complete dentures].

The Authors have experimentally verified Monteith's mathematical formula validity for determination of occlusal plane in edentulous patients in order to realize some complete dentures. They have held the inquiry on two groups of patients: group A, edentulous patients that need a complete denture for first time (ex novo); group B, patients that before had a complete denture and regretted a short aesthetic and functional adaptation. The results obtained for every patient confirm mathematical formula validity and show the importance of a correct determination of occlusal plane in edentulous patients for construction of complete dentures.

Dental Occlusion, Centric↗

PubMed2004

[Complete denture occlusion considered from occlusal contacts during mastication].

Few reports describe the functional superiority of full balanced occlusion to that of lingualized occlusion. Recently, a bilateral balanced scheme has been much more generally applied than a unilateral balanced scheme in lingualized occlusion as well as in full balanced occlusion. Occlusal contacts on the non-chewing side occur earlier than on the chewing side;in the order of second molar, first molar, and then premolars. The contact on the balancing side contributes to the prevention of denture dislocation and guidance from eccentric positions to the centric occlusal position during mastication. Therefore, bilateral balanced occlusion was shown to be effective for denture stability during mastication with complete dentures. Today's typical edentulous patients have greater mean age than in the past, and thus are seen with severe alveolar bone resorption, thin mucosa and sometimes abnormalities of the maxillomandibular relation. Their occlusal positions are often unstable and changeable after insertion of complete dentures. Because lingualized occlusion allows for easier accommodation and correction, lingualized occlusion is more suitable for such cases than full balanced occlusion, which requires a strict occlusal relationship. In light of the standard Japanese diet, there is some doubt about why lingualized occlusion might be suitable for Japanese edentulous patients in terms of the sense of mastication. A method of evaluating the sense of mastication needs to be established.

English Abstract↗

PubMed2006

Facts and fallacies: an evidence base for complete dentures.

UNLABELLED: The rate of edentulism is falling but many edentulous people still need complete dentures. There is poor correlation between the quality of dentures and patient satisfaction. There is no evidence that a more complex fabrication technique including face-bow registration results in a better clinical outcome. Balanced occlusion/articulation is not necessary for successful complete denture function. Variations in materials and techniques appear to have only minor influence, if any, on the clinical end result. Psychosocial factors, especially a good relationship between dentist and patient, are more important than prosthodontic factors for a positive outcome. CLINICAL RELEVANCE: Creating a good relationship between the dentist and the patient is extremely important for a successful outcome of a complete denture treatment.

Dental Impression Technique↗