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At least 307 records · Page 17Linked to original sources
PubMed1991

Changes in vertical dimension of occlusion in conventional and microwave processing of complete dentures.

An investigation was made to compare the increase in vertical dimension of occlusion in complete dentures after processing with conventional and microwave procedures. Lucitone-characterized denture base material was used for 15 sets of complete dentures cured conventionally. Justi-characterized acrylic resin and microliquid were used for 15 sets of complete dentures cured by the microwave procedure. The results of the study showed increases in vertical dimension of occlusion in both methods under 1 mm, which is considered technically acceptable. However, a statistically significant larger increase was present in the microwave technique.

Acrylic Resins↗
PubMed2004

Investigation of new complete denture quality and patients' satisfaction with and use of dentures after two years.

OBJECTIVES: To investigate if clinical quality of new complete dentures predicts patient satisfaction with and usage of those dentures two years after insertion in the same way that it did initially and three months after insertion. METHODS: Four hundred and seventeen patients recruited to a denture outcome study two years previously were surveyed. In each case aspects of denture quality had previously been rated according to a validated method at the first post-insertion visit and patients had completed a postal questionnaire three months after denture insertion. When the dentures were two years old, patients were sent another postal questionnaire to assess denture usage and satisfaction with the dentures. RESULTS: The response rate to the postal survey was 87%. Data were analysed using structural equation modelling and Bayesian belief networks. No significant associations were found between aspects of new denture quality and patient satisfaction with and use of complete dentures after two years. These results contrast with the three month returns from the same patients that demonstrated significant associations between new denture quality and satisfaction with and use of new complete dentures. CONCLUSIONS: The authors conclude that initial clinical quality of new complete dentures is not a significant factor in determining patients' satisfaction with and use of these complete dentures two years after insertion.

Aged↗
PubMedDate not supplied

Changes in the masticatory function of complete denture wearers after relining the mandibular denture with a soft denture liner.

PURPOSE: The purpose of this study was to examine changes in the masticatory function of complete denture wearers after relining the mandibular denture with a soft liner. MATERIALS AND METHODS: Conventional complete dentures were fabricated for 6 completely edentulous patients. One month after completing adjustments of the dentures, maximum biting force, masticatory performance, and electromyography of the masseter muscle during mastication were recorded. Chewing strokes, chewing time, muscular activity, and masticatory rhythm were calculated using the recorded electromyography. The mandibular dentures were then relined with a soft liner. One month after finishing adjustments of the relined dentures, the same tests were performed. These values were compared using a paired t test (alpha = 0.05). RESULTS: When using the soft liner, masticatory performance and maximum biting force were significantly greater (P = 0.019 and P = 0.023, respectively). In addition, the number of chewing strokes was significantly lower (P = 0.020), and chewing time was reduced (P = 0.010). A more stable masticatory rhythm was also found in the initial chewing stage. The muscular activity tended to decrease after the insertion of the lined denture, but no significant difference was found between before and after relining. CONCLUSION: It was shown that applying a soft lining material to the mandibular dentures of 6 edentulous patients improved masticatory function with no adverse effect on the muscular task.

Acrylic Resins↗
PubMed1999

A simple method of adding palatal rugae to a complete denture.

Restoring patients' speech is an important goal in complete denture fabrication. For those patients who have difficulty with their speech patterns accommodating to the introduction of a prosthesis, texture in the palatal region may prove helpful. This article describes methods of incorporating palatal rugae in a newly fabricated and existing complete denture.

Acrylic Resins↗
PubMedDate not supplied

Differences in oral stereognosis between complete denture wearers.

To better understand patients' relative satisfaction with complete dentures, differences in oral stereognostic perception, based on the identification of small objects placed in the mouth, were investigated. It was found that the oral stereognosis test applied is reliable for measuring patients' oral stereognostic perception. However, the positive correlation of other studies concerning the relationship between oral stereognosis and satisfaction with complete dentures was not confirmed in this study.

Adaptation, Psychological↗
PubMed1979

Articulator-generated amalgam stops for complete dentures.

Balanced occlusion in eccentric positions for complete denture occlusion is an acceptable and widely practiced concept. Many methods have been described for achieving balanced occlusion. The technique outlined in this article uses amalgam stops generated on a programmed Hanau Model H2 articulator. The posterior occlusal scheme used to facilitate this technique is also described.

Dental Amalgam↗
PubMed1980

Ingestion of mandibular complete denture.

Radiographs did not disclose a mandibular complete denture that had been swallowed by an elderly patient. Radiopaque disks placed in a plastic denture could enable the practitioner to identify the denture on a radiograph.

Denture, Complete, Lower↗
PubMed2001

The "flexible augmented flange technique" for fabricating complete denture record bases.

A technique for fabricating complete denture record bases that features flanges augmented with resilient liner is reintroduced and recommended. It is coined the "flexible augmented flange technique." The technique takes advantage of the elastic properties of tissue conditioner, available anatomic undercuts in definitive casts, and the rigidity of record base resin to create stable, retentive, well-fitting, and comfortable record bases that minimally abrade casts. Tissue conditioner, which strongly bonds to the intaglio surface of record base flanges, replaces blockout wax to form augmented flanges with flexible inner sections that are sufficiently elastic to engage and then release from undercuts. The flexibility of the inner section of the flanges permits atraumatic insertion and removal from a patient's mouth, despite overall record base rigidity. Accurate, verifiable, maxillomandibular jaw relation records can be obtained with the flexible augmented flange technique.

Acrylic Resins↗
PubMed1976

[Changes in shape of complete dentures in the mouth].

Form changes of complete dentures were measured in 60 patients. Some of the dentures were made of Paladon 65 and the others of PMMA by the "casting method". The first check was made on the day when the denture was inserted and the last up to 90 days thereafter. In the time the denture was worn, the form changes were recorded and evaluated by means of special markings. It was found that, under masticatory load, the dentures were slightly expanded transversally by 0.2 to 0.4% in the regions of the tuberosity and the anterior teeth. It was not possible to demonstrate a clear difference in the form stability of the base material Paladon 65 and that of PMMA (using the "casting method") during the three month in which the dentures were worn.

Dental Casting Technique↗
PubMedDate not supplied

[Theory and practice in the taking of complete denture impressions].

The fundamental principles applicable to complete dentures are examined. Particular attention is given to the anatomical state of the so-called "biostatic areas" and the importance of a positive load: support ratio between the dental plate and biological tissue. The fundamental principles relating to the taking of impressions are discussed and stress is laid on the importance of imparting a functional character to the relief. Various techniques for the construction of a correct plate and their advantages and disadvantages are illustrated. Reference is made to preliminary impressions, resin spoons, the functional nature of the peripheral edges, and final impressions, with or without compression.

Dental Impression Materials↗
PubMed2004

A three-visit, complete-denture technique utilizing visible light-cured resin for tray and base plate construction.

This article describes a technique of constructing a set of maxillary and mandibular complete dentures in three visits instead of the usual five clinical appointments. This system of complete-denture construction is made possible because of the combined use of visible light-cured material as an impression tray and record base material, as well as the use of new biometric wax occlusion rims. Unlike some earlier techniques that use light-cured resin composites as the denture base materials, this method retains the use of heat-cured polymethylmethacrylate as the denture base material.

Acrylic Resins↗
PubMed1987

The maxillary complete denture opposing natural teeth: problems and some solutions.

The problems involved in providing comfort, function, proper esthetics, and retention for the maxillary complete denture patient with natural opposing dentition can be challenging. Careful preparation of the patient is important. It provides the new complete denture patient the opportunity to adapt to a complete denture and allows the dentist to evaluate his patient physically and emotionally before fabrication of the final complete denture. Methods for planning and fabrication of a denture that provide comfort, function, and stability have been described.

Adaptation, Physiological↗
PubMed2000

[Staining of complete denture: a preliminary clinical study]

OBJECTIVE:To study the relation between staining of complete denture and drinking tea, coffee and smoking, and to evaluate the result of denture cleaning agent on removing stain of complete denture.METHODS:A survey of 176 patients with complete dentures were carried out, which included the history of drinking tea, coffee and smoking, the use of denture-cleaning agent and the times of daily use. Statistical analysis was performed to determine the relationship between staining of denture and the above factors. RESULTS:The results showed (1)The longer the complete denture was weared, the more serious the staining. (2)Drinking tea and smoking were the main causes for denture staining. (3)Daily use of cleaning agent can effictively remove stain of denture. CONCLUSION:Change of life habit(drinking less tea and stop of smoking) and daily use of cleaning agent can reduce denture staining.

Journal Article↗
PubMed1997

"Prosthetic condition" and patients' judgment of complete dentures.

PURPOSE: This study introduces the concept "prosthetic condition", which combines the quality of complete dentures and residual alveolar ridges. MATERIAL AND METHODS: A pilot study was performed to select quality criteria with an acceptable interobserver agreement. With these criteria, a clinical examination was performed to assess the quality of the existing complete dentures and the residual alveolar ridges of 397 complete denture wearers. During clinical examination, the interobserver agreement of the selected criteria was retested. The "prosthetic condition" was assessed by combining the scores for denture quality and quality of the residual alveolar ridges. Subsequently, participants' satisfaction with and complaints about their dentures were scored according to their answers to specific questions. RESULTS: Logistic regression analysis demonstrated that no variable of the "prosthetic condition" proved to explain the denture satisfaction. Some variables of the "prosthetic condition" had a significant but not relevant correlation with some denture complaints. CONCLUSIONS: More research is necessary to substantiate the concept "prosthetic condition" as an acceptable measure of professionally quality assessment of dentures and denture-bearing surfaces. However, in determining the treatment need of community-dwelling groups, this concept seems a more realistic measure than denture quality only.

Adult↗
PubMed1989

[Mechanical analysis of the denture bases using the photoelastic-coating method. 2. Upper complete denture bases under uniform bending moment load].

Deformation of the anterior teeth and palatal regions on upper complete dentures was investigated using the photoelastic coating method and strain gages. In this experiment, an uniform-moment bending load method was employed to simulate the occlusal situation, and the distribution of strain in epoxy resin, stainless swaged and Co-Cr alloy cast dentures were measured and analyzed. The 030-series reflection polariscope is compact and lightweight with its main components consisting of two polarizer/quarter-wave-plate assemblies attached to a common frame. The highest level of strain was seen in the anterior region of the palate and the low strain was observed in other regions. Differences in strain magnitude of the three dentures were not observed with test at the same point. But, when denture base materials with high flexural rigidity and bending strength were used on the palatal region of the denture base, strain was decreased in the anterior and other regions of the palate. Therefore, dentures using those materials could be effectively reinforced.

Dental Stress Analysis↗
PubMed1990

[A reliable method for evaluating the masticatory function in complete denture wearers, concerning a masticatory function evaluation chart based on food hardness].

The purpose of this study was to construct an evaluation chart to objectively and simply determine the extent of the masticatory function of complete denture wearers in daily clinical practice, and to describe the chart's clinical application. 58 different types of food were selected according to two criteria: their frequency of ingestion by complete denture wearers, and their convenience for determining the masticatory function. Then an anatomical artificial porcelain set of dentures was used to bite each food item, using only bicuspids and molars. Dentures were installed on an Instron Universal Testing Instrument to compression-cut the food. Food requiring the highest pressure was considered the hardest food. Then the masticatory function evaluation chart was constructed by using the hardness of the food as an index of relative masticatory difficulty. Using this chart, 95 complete denture wearers were tested to determine the masticatory function of their dentures. The following results were obtained: 1. The mean hardness of the 58 food items tested was 7.85 +/- 11.29 kg. The mean hardness of the 38 food items frequently ingested by complete denture wearers was 5.24 +/- 5.41 kg. 2. The differences in hardness of the foods tested were statistically processed, and the 58 food items were classified into 5 groups (I-V). This five-fold classification was used as a range for determining masticatory function. 3. A correlation coefficient of -0.697 (p less than 0.01) was found between the hardness of the food and the ease of eating the food. 4. A correlation coefficient of 0.548 (p less than 0.01) was found between the hardness of the food and the frequency of ingestion. 5. The masticatory function was determined on a 5-point scale from A to E according to the total number of food types that the subjects said that they could eat easily. The masticatory function increased progressively from A to E. The results of determining the masticatory function of the 95 complete denture wearers were as follows: Rank A 1.1%, B 10.5%, C 34.7%, D 29.5% and E 24.2%. 6. Persons who evaluated their own dentures positively comprised 86.0% of ranks D and E. On the other hand, persons who evaluated their own denture negatively were widely distributed from rank A through E, indicating that there were considerable individual differences. 7. It was concluded that the masticatory function evaluation chart was a reliable means of objectively and simply determining the masticatory function of complete denture wearers.

Bite Force↗