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At least 415 records · Page 23Linked to original sources
PubMed2001

Using the neutral zone to obtain maxillomandibular relationship records for complete denture patients.

A technique for obtaining maxillomandibular registration for complete denture patients is presented. The maxillary rim is formed with the use of conventional techniques. The mandibular rim is made from modeling plastic impression compound on a record base formed by the patient into the neutral zone. The mandibular rim then is reheated, and the patient determines the occlusal vertical dimension by swallowing. An imprint of the maxillary rim is made on the mandibular rim at the occlusal vertical dimension. The posterior extent of the mandibular rim is relieved 1 mm. Orientation notches are placed in both rims, and centric relation is recorded with a fast-setting vinyl polysiloxane material.

Centric Relation↗
PubMed1991

Replacement complete dentures: no friends like old friends.

Provision of replacement complete dentures for an increasingly elderly population presents problems for the dentist. Reduced adaptability in the older person leads to difficulty in learning to use new appliances unless existing skills can be employed. It is therefore helpful to reproduce familiar features of a patient's old appliances, especially if these have been used for some years. This paper describes a method of treatment that provides both clinician and laboratory with the ability to achieve this objective, while retaining freedom to eliminate clinically-identified faults in the old appliances in the process of provision of the new. The technique depends on the substitution of conventional wax-rimmed record blocks with wax replicas of the old appliances. These replica record blocks lend themselves to any - major or minor - alteration during occlusion recording. They also incorporate a rigid baseplate and function as special trays.

Adaptation, Physiological↗
PubMed1990

[A study of occlusion phase during mastication in complete denture patients].

Author examined the chewing patterns of 10 complete denture wearers with LED mandibular tracking device, and analyzed the average cycle time, average occlusion time and the ratio of average time/average cycle time during chewing occlusion various test foods-standardized carrot and ham, the results were as follow: 1. The average cycle time of chewing carrot was longer than that of chewing ham. 2. The average occlusion time of chewing carrot was longer than that of chewing ham. 3. The ratio of average occlusion time/average cycle time of chewing ham was greater than that of chewing carrot. 4. During chewing carrot or ham, there was an increasing tendency in occlusion time and ratio of occlusion time/cycle time.

Dental Occlusion↗
PubMed1993

[Jawbone reduction in immediate prostheses. A comparison between overdentures and complete dentures].

In a randomized controlled clinical trial 74 patients who required immediate dentures were randomly treated with immediate overdentures on 2 lower canines or immediate complete dentures. Mandibular bone reduction was measured using oblique lateral cephalometric radiographs made at base-line and the results compared with those of one year and two years after denture treatment. Analysis of the data showed that the average bone reduction in the lower canine regions in the first year was 0.75 in the immediate overdenture group and 1.90 mm in the immediate complete denture group. In the posterior parts of the mandible the bone reduction was respectively 0.77 and 1.77 mm. The differences were statistically significant in all measured regions. The differences in the first two years were significant in all regions except the molar region. Retention of roots of canines beneath a mandibular denture in immediate denture patients, even when they were in poor condition, reduced the collapse of the alveolar processes in all region of the mandible.

Alveolar Bone Loss↗
PubMed2003

Comparison between balanced occlusion and canine guidance in complete denture wearers--a clinical, randomized trial.

OBJECTIVE: Two occlusal concepts exist for the setup of complete dentures: canine guidance and balanced occlusion. These two schemes were studied in a randomized clinical trial of 22 patients. METHOD AND MATERIALS: Subjective data were collected using a visual analog scale that described the patients' satisfaction with the esthetic appearance, the ability to chew, the ability to speak, and denture retention. Objective data were collected on the number of denture ulcers, the number of occlusal contacts, and denture retention during eccentric movements. Statistic evaluation was performed with the Friedman test. RESULTS: Patients assessed canine-guided dentures to be significantly more satisfying in esthetic appearance, mandibular denture retention, and chewing ability. The ability to speak and the retention of maxillary dentures were not influenced by the occlusal concept in the patients' opinion, whereas the examiners found that maxillary canine-guided dentures lost retention more frequently during eccentric movements than balanced dentures. The objective inspection of mandibular denture retention underscores the patients' assessment, showing that the mandibular canine-guided dentures are much more stable during laterotrusive and protrusive movements. CONCLUSION: Canine guidance can be used successfully in complete denture treatment as it provides better mandibular denture retention, esthetic appearance, and chewing ability.

Aged↗
PubMedDate not supplied

The symphyseal single-tooth implant for anchorage of a mandibular complete denture in geriatric patients: a clinical report.

Little information exists to define the minimum number of implants required for sufficient anchorage of mandibular overdentures. To date, 2 implants placed in the interforaminal region have been considered the minimum. The aim of this study was to examine whether a single symphyseal implant would suffice for adequate anchorage of a mandibular complete denture in elderly patients (octogenarians), and whether this surgically, prosthetically, and financially simple concept would also satisfy patients needing replacement of the mandibular dentition. Nine patients with a mean age of 82.2 years underwent placement of a single symphyseal endosseous implant and anchorage of a complete denture using a ball attachment. Standardized recall examinations, including patient response and inspections of the peri-implant soft tissue and bone conditions, were carried out at 3- to 6-month intervals for a period of 1 1/2 years. It was found that anchorage with a single implant led to both a significant improvement in patients' subjective satisfaction (P < .01) and a significant reduction in reported symptoms (P < .01). During the observation phase, pocket depth and bone resorption initially increased around implants but stabilized after the sixth month. Denture management (placement and removal) also improved during the recall period (P < .01). The results of this study indicate that oral rehabilitation by mandibular complete dentures anchored on a single implant can be considered an economical therapeutic alternative to a conventional mandibular complete denture for very old (octogenarian) patients.

Aged↗
PubMed1993

[The functional occlusal contact area and masticatory efficiency in complete denture].

The authors developed a new method to measure the occlusal contact area in complete denture by using the IBAS 2000 (Interactive Image Analysis System). The masticatory efficiency and functional occlusal contact area were measured and analysed for 16 cases of complete dentures. The results showed that the relation between occlusal contact area and masticatory efficiency was positive significantly and different region of occlusal contact area had its corresponding masticatory efficiency. It is indicated that a given occlusal contact area is necessary to satisfy the masticatory efficiency required. If the masticatory load is great the width of supporting cusp should be reduced and a definite width of nonsupporting cusp should be preserved for holding the food being masticated.

Aged↗
PubMed1996

Signs of temporomandibular dysfunction related to edentulousness and complete dentures: an anamnestic study.

Symptoms of temporomandibular dysfunction (TMD) are prevalent among elderly individuals with complete dentures. In the agrarian areas of middle Finland it was, as recently as a few decades ago, almost a tradition to extract teeth during young adulthood. Women who today are in post-menopausal age are the last sizable age group in Finland where the problems of edentulousness can be investigated. The purposes of this study were twofold. First, postmenopausal women who are edentulous in the maxilla or totally edentulous were studied to determine if they differ from women with natural teeth in both jaws in terms of subjective TMD symptoms. Second, these subjective symptoms were examined to discover any correlation with duration of edentulousness, age of the dentures, or difficulties in wearing them. The results suggest that for postmenopausal women, clicking noises in the temporomandibular joint and tension in the neck are more common complaints among denture wearers than among those who still have natural teeth. Factors that make the wearing of complete dentures more difficult may also predispose the wearer to TMD symptoms. Duration of edentulousness is not, however, related to the prevalence of anamnestic TMD symptoms.

Chi-Square Distribution↗
PubMed1992

Mandibular complete denture impressions with fluid wax or polysulfide rubber: a comparative study.

Some authors have stated that wax cannot be used to make impressions for complete dentures, while others have found that wax has some advantages over elastomeric impression materials. The purpose of this study was to compare mandibular impressions made with a fluid wax to those made with light-body polysulfide rubber. Fifteen maxillary and mandibular complete dentures were made using fluid wax as a final impression material. For comparison, 15 maxillary and mandibular complete dentures were made using light-body polysulfide rubber. The number of adjustments required over 1 year was recorded. No statistical difference in adjustments was noted between the two groups.

Aged↗
PubMed1999

Comparison of patients' appreciation of 500 complete dentures and clinical assessment of quality.

To compare patients' appreciation and clinical assessment of quality of complete dentures 500 patients attending a dental teaching hospital for provision of new complete dentures were recruited. In each case denture quality was assessed by an experienced prosthodontist using a validated classification of aspects of denture quality. Patients graded their appreciation of features of the dentures on a four point scale. Multiple correspondence analysis demonstrated close correspondence between dentist and patient appreciation of dentures when the dentures were rated as poor, but little or no correspondence when dentists or patients rated the dentures highly.

Attitude of Health Personnel↗
PubMedDate not supplied

Maintenance requirements of implant-supported fixed prostheses opposed by implant-supported fixed prostheses, natural teeth, or complete dentures: a 5-year retrospective study.

PURPOSE: The purpose of this study was to compare the maintenance requirements of implant-supported fixed prostheses with cantilever arms in edentulous jaws when opposed by fixed prostheses of similar design, by natural teeth, or by complete dentures. MATERIALS AND METHODS: The maintenance requirements for the 5-year follow-up period were obtained by examining the dental records of 37 people. Six were provided with fixed prostheses in both arches, 22 with a fixed prosthesis in the mandible opposed by a complete denture, and 9 with a fixed prosthesis opposed by natural teeth. Everyone was treated with Nobel Biocare implants using standard implant and prosthetic protocols. RESULTS: The denture teeth and acrylic resin were repaired on 44 occasions in the group with implants in both jaws, on 14 occasions in the group with implants opposed by natural teeth, and twice in the group in which the implants were opposed by a complete denture. The group with implants in both jaws was more likely to fracture the gold-alloy framework, which occurred on six occasions. The group with implants in both jaws was significantly different from the other two groups in relation to higher incidence of fracture of the teeth and gold-alloy framework. CONCLUSION: The maintenance requirements of implant-supported fixed prostheses with cantilever arms opposed by fixed prostheses of similar design were much greater than when opposed by natural teeth or complete dentures.

Acrylic Resins↗
PubMed2001

Assessing expressed need and satisfaction in complete denture wearers.

OBJECTIVES: The need to assess both lay and professional views of oral health is believed to be at the centre of success when providing dental health care for older patients. Self-perceived physical (oral) health and perceptions of psychosocial functioning must be included if expressed need is to be assessed. The aim of this work was to construct an expressed need schedule and to assess the ability of this assessment to predict older community-based patients' satisfaction with complete dentures. DESIGN: Survey of 260 people aged 65 years and over. SETTING: Community setting. MAIN OUTCOME MEASURES: The participants were interviewed using a 55 item modified version of the Oral Health Impact Profile (OHIP) to assess their psychological, social and perceptions of their oral health. All participants were subjected to an oral examination. RESULTS: The results showed that complete denture wearers compared had greater experience of difficulties associated with oral health and psychological functioning. Factor analysis allowed the identification of three dimensions associated with psychological, social and self-perceived physical (oral) health. When these factors were regressed with normative denture treatment need against satisfaction with complete dentures, satisfaction was characterised by high self-perceived physical (oral) health, low social health problems and no identifiable normative need. CONCLUSION: This work supports the inclusion of self-perceived physical (oral) health and psychosocial health (expressed need) questions in a schedule when predicting satisfaction with complete dentures.

Activities of Daily Living↗
PubMed1989

Comparative electromyographic study of elevator muscles in patients with complete dentures and natural dentition.

An analysis of integrated electromyographic (IEMG) activity of masseter and anterior temporal muscles was undertaken in fifteen patients with complete dentures and eight adult subjects with natural dentition. Bipolar surface electrodes were used for IEMG recordings during maximal voluntary clenching and saliva swallowing in the inter-cuspal position. The IEMG activity of both muscles during maximal voluntary clenching was significantly lower in patients with complete dentures than in subjects with natural dentition. During saliva swallowing the activity in both muscles was similar in both groups. This may have a great clinical significance in the maintenance of the functional state of the different structures of the stomatognathic system in complete denture wearers, since the process of swallowing is a 24-h function repeated about 600-2400 times each day.

Aged↗
PubMed1989

[Occlusal contacts of complete denture during mastication in telemetry system].

The purpose of this study was to develop a telemetry system and to analyze the occlusal contacts of complete denture during mastication. The telemetry system consisted of a transmitter unit and a receiver unit. The transmitter allowed 6 channels of information of the occlusal contacts to be telemetered by time division multiplex communication method within the approximate distance of 2 m. The occlusal surface of the upper complete denture was made of metal and that of the lower denture was made of metal contact plates of 0.5 mm in width with each space of 0.5 mm. Then the transmitter was embedded in the lower complete denture. Occlusal contacts of 66 aged edentulous male were investigated both on the chewing side and on the nonchewing side in the premolar, the 1st molar and the 2nd molar regions. The results were as followed: 1. The occlusal contacts in the nonchewing side preceded those in the chewing side, with higher frequency and longer duration. 2. In the nonchewing side, the occlusal contact occurred at different time; the occlusal contact was observed first in the 2nd molar, then 32-48 ms later in the 1st molar, and 2-48 ms later in the premolar regions. 3. It is suggested that the balancing contact should be considered for stabilizing the denture in mastication.

Dental Occlusion↗