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Results for “Denture Rebasing”

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At least 127 records · Page 7Linked to original sources
PubMed1996

Effects of improvements of poorly fitting dentures and new dentures on masseter activity during chewing.

The effects of four sequential modifications to improve occlusion, vertical dimension, retention, and stability of poorly fitting dentures, and of placing new dentures, on the EMG activity were investigated in 21 denture wearers with a mean age of 67.7 years. Electromyographic recordings of right and left masseter muscles were made while the subjects performed masticatory and swallowing threshold tests and applied static guided forces were measured before and after each modification and at three intervals after the delivery of new dentures. A 2-week adaptation period was allowed for each denture modification. Three- and 12-week adaptation periods were allowed for the new dentures. No significant changes were found in guided static bite force or peak bite force during chewing following any modification or insertion of new dentures. Significant decreases (p < 0.05) from the original poorly fitting denture in preferred side and nonpreferred side muscle activity were found for the preferred side tests with both foods after both the correction of occlusion and 3 mm increase in vertical dimension. Concomitant decreases (p < 0.05) in the masseter closing burst and stroke durations were found and contributed to the reduction in masseter muscle effort. Further reductions (p < 0.01) in masseter closing bursts and stroke durations were observed with new dentures. The results revealed that new dentures or the stabilization of poorly fitting dentures through occlusal correction and restoration of occlusal vertical dimension permits patients to use less muscle effort while chewing and maintaining their initial masticatory performance.

Adaptation, Physiological↗
PubMed1996

Effects of improvements of poorly fitting dentures and new dentures on patient satisfaction.

Clinicians reline or replace dentures to improve occlusion, stability, retention and facial support. They believe that well-fitting dentures will maintain supporting tissues in good health and satisfy patients by improving oral function and self-esteem. In this study, satisfaction of 21 patients with poorly fitting dentures was assessed before and after the dentures were modified to improve occlusion, vertical dimension of occlusion, and retention and stability or the dentures were replaced with new ones. More than 55% of the patients were moderately to fully satisfied with their poorly fitting dentures. Most patients perceived improvements in chewing comfort, chewing ability, eating enjoyment, food choices, security, and speech after each denture modification and with new dentures. The relative importance of the four sequential modifications could not be determined because they were made sequentially and their effects became cumulative. Chewing ability, eating enjoyment, particles under dentures, and food choices were highly correlated with chewing comfort and overall patient satisfaction. The results support the belief of many clinicians that patients benefit from relining of poorly fitting dentures or replacement with new dentures. Improvements in chewing function were perceived by most patients despite the lack of improvement in masticatory performance or masseter muscle activity with modified or new dentures. It is likely that denture wearers perceive chewing ability in terms of chewing comfort rather than ability to comminute food, an objective measure of chewing performance. The latter is not altered markedly by the clinical excellence of dentures.

Adaptation, Physiological↗
PubMed1997

Effect of low-energy laser application in the treatment of denture-induced mucosal lesions.

STATEMENT OF PROBLEM: Mucosal inflammation under dentures causes problems for prosthodontists and patients. PURPOSE OF STUDY: This study evaluated the effectiveness of a low-energy laser used in the treatment of denture-induced mucosal lesions in comparison with other conventional methods. MATERIAL AND METHODS: Eighteen men were selected and divided into three groups of six according to the treatment applied: denture removal, relined dentures with temporary tissue treatment, and application of laser irradiation for the lesions while continuing to wear the dentures. Oral hygiene and nutrition were maintained during the study. Clinical, histologic, and densitometric assessments were used to evaluate the three treatment methods. RESULTS: The results revealed that lesions in the group treated with laser irradiation were clinically superior in healing when compared with the other groups. Histologic evidence of the therapeutic effect of lasers in healing denture-induced mucosal lesions was demonstrated. Densitometric evaluation showed an increase in the optical density of alveolar bone underneath the irradiated lesions compared with untreated lesions. CONCLUSION: These findings suggest the effect of therapeutic laser treatment on both soft tissue and bone with subsequent improvement of denture foundation after treatment of denture-induced mucosal lesions.

Adult↗
PubMed1998

Sectional impressions for mandibular distal extension removable partial dentures.

STATEMENT OF PROBLEM: Corrected impression procedures provide the best possible support to be gained from an edentulous ridge for a removable partial denture, but they are time-consuming and technique-sensitive. PURPOSE: An experimental mandibular distal extension removable partial denture was used to measure the vertical movement of denture bases during biting. MATERIAL AND METHODS: Five patients participated for whom vertical movement of denture bases was measured by comparing the thickness of plaster interocclusal records made with the denture at rest and under biting pressure. Denture bases were processed on master casts formed from final impressions made in full arch custom trays. Secondly, bases were readapted using sectional relining impressions with the same regular body polysulfide impression material. RESULTS: Statistical analysis of the vertical movement of denture bases during biting at 4 points on the right and left denture bases showed a significant decrease in vertical movement with sectional impression. The reduction was less than a 0.1 mm, a result that questions the routine use of sectional impression for every distal-extension mandibular removable partial denture. CONCLUSION: Supportive form of distal-extension edentulous ridges can be recorded successfully by full arch impressions in custom trays.

Adult↗
PubMed1999

Simplified methods for fabricating tissue-supported implant-retained overdentures with retention from a resilient liner.

Resilient denture liner materials can be useful for tissue-supported implant-retained overdentures. They allow physiologic movement of the denture toward the tissues. This article presents a technique that offers several advantages over other methods of fabricating the overdenture with a resilient liner, and of transferring the superstructure: the acrylic resin base and the heat-cured resilient liner material are cured simultaneously; superstructure blockout is performed in the laboratory instead of in the mouth, where blockout is difficult; and direct transfer of the superstructure bar is more accurate and eliminates possible fracture of the duplicated superstructure if formed in die stone.

Acrylic Resins↗
PubMed2003

Surgical placement of two implants in the anterior edentulous mandible--how much time does it take?

In order for clinicians to effectively manage their practices, they need to know how much time they spent in carrying out procedures. The provision of two-implant overdentures for edentulous patients is becoming more prevalent as increasing evidence demonstrates their great benefit to patients. The aim of this study was to measure the number of visits and the time required during the surgical phase (from pre-op examination to preliminary impressions) of mandibular two-implant overdenture treatment. Thirty edentulous patients were assigned to receive two root-form implants in the mandible between the mental foramen, as part of a randomized controlled clinical trial. All visits and time spent by the oral surgeon, the surgical assistant and the prosthodontist were measured individually. The mean number of scheduled visits with the oral surgeon was four, and the mean time taken was 104 min. The mean time taken by the surgical assistant was 122 min. On average, the prosthodontist was required for two visits, with a total mean time of 36 min. In addition to the scheduled visits, 14 patients solicited additional appointments (unscheduled visits) for various problems (e.g. loose healing cap). The average time taken for unscheduled visits was 32 min. Combining scheduled and unscheduled visits, the mean total time taken by the oral surgeon was 109 min. The surgical assistant was needed for a mean total of 125 min, and the prosthodontist spent, on average, 46 min in this phase of treatment. Results from this study will assist clinicians in establishing the total time and number of visits needed for the surgical phase of two-implant mandibular overdenture treatment.

Aftercare↗
PubMed2000

Specific clinical problem areas.

In this final article of the series, the clinical and technical aspects of a range of similar forms of immediate prosthesis are discussed. Similarly, copy denture and reline/rebase procedures are detailed.

Dental Prosthesis, Implant-Supported↗
PubMed2001

Initial prosthetic treatment.

This article describes measures designed to provide short-term solutions to existing RPD problems and to establish an optimum oral environment for the provision of definitive prostheses.

Denture Rebasing↗