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At least 847 records · Page 47Linked to original sources
PubMed1978

Re-establishing natural tooth position in the endentulous environment.

The routine prosthetic arrangement of teeth set according to arbitrary criteria frequently results in adaptive problems, tissue damage, poor aesthetics, lack of stability and functional disabilities. A phonetic technique, based on the "S" position of the mandible, in the majority of cases provides a useful aid in achieving natural tooth positions and the occlusal vertical dimension. This technique can enhance the quality of prosthodontic service especially for patients having difficulties with full dentures.

Alveolar Process↗
PubMed1992

Prosthodontic procedures for implant reconstruction. 2. Post-surgical procedures.

There is essentially no flexibility in an osseo-integrated implant system, so that the final fit of the prosthesis must be absolutely precise. A simple approach to this problem is presented with details as to impression taking, confirmation of accuracy of the master cast, fitting of the cast metal framework and construction of the superstructure. The information presented describes a full arch fixed restoration attached to mandibular implants, but may easily be followed for the maxilla or modified for quadrant restorations.

Acrylic Resins↗
PubMed1995

The bonding of cold-cured acrylic resin to acrylic denture teeth.

The necessary improvement of the bonding of denture teeth to the base resin has been hampered by inconsistent results and the consequent lack of clear guidance as to the best procedure to use. This state of affairs is in part due to poor experimental design. The tensile strength of notched planar interfaces between acrylic denture tooth material and cold-cured acrylic resin was determined for various treatments under a protocol designed to minimize spurious failures. The tooth material treatment consisting of grinding and exposure to a methyl methacrylate-trichloromethane mixture was, of those treatments, the most reliable in that no interfacial failures were observed. Strength was indistinguishable from that of both tooth and base acrylic under the same conditions.

Acrylic Resins↗
PubMed2002

Comparative bond strengths of autopolymerising denture resin and light cured composite resin to denture teeth.

AIM: To investigate the shear bond strengths between light cured composite and autopolymerised acrylic resin bonded to acrylic resin denture teeth. METHODS: Surface treatments were used for the denture teeth included wetting with methylmethacrylate (MMA) monomer, composite bonding agent and acid etching. The samples were divided into seven groups. Two groups of specimens were immersed in distilled water for 30 days to hydrate the teeth. Five other groups of embedded denture teeth were stored in air at room temperature for 30 days. RESULTS: Analysis of variance indicated statistically significant differences between groups (P < 0.001). CONCLUSION: The greatest bond strengths to denture teeth were in acrylic resins polymerised with pressure and wetted with monomer. The bond strengths of hydrated and unhydrated samples gave similar results both with acrylic resins and composites.

Acrylic Resins↗
PubMed2003

Late-life depression: its oral health significance.

Late-life depression (LLD) initially occurs after age 65 and is a major public health concern because elderly people who are at high risk constitute an ever-expanding segment of the population. LLD is a mental illness in which mood, thought content, and behavioural patterns are impaired, causing individual distress, compromising social function and impairing self-maintenance skills (e.g. bathing, dressing, hygiene). It is characterised by marked sadness, or a loss of interest or pleasure in daily activities and may be accompanied by weight change, sleep disturbance, fatigue, difficulty concentrating, and high suicide rate. Individuals under treatment for LLD and those whose illness has not been diagnosed or treated often present to the dentist with significant oral disease. LLD is frequently associated with a disinterest in performing oral hygiene, a cariogenic diet, diminished salivary flow, rampant dental decay, advanced periodontal disease, and oral dysesthesias. Many medications used to treat the disease magnify the xerostomia and increase the incidence of dental disease. Appropriate dental management necessitates a vigorous preventive dental education programme, the use of artificial salivary products, antiseptic mouthwash, daily fluoride mouthrinse and special precautions when administering local anaesthetics with vasoconstrictors and prescribing analgesics.

Activities of Daily Living↗
PubMed1988

Suitability of human, bovine, equine, and ovine tooth enamel for studies of artificial bacterial carious lesions.

The progress of artificial caries-like lesions created in human, bovine, equine, and ovine enamel has been studied. Lesions were produced by exposure to an acid gel system or by 5-day exposure to a sequential batch culture technique using Streptococcus mutans NCTC 10832. Longitudinal ground sections were prepared. The lesions were of similar appearance in all species when examined in polarized light. The depth in human enamel was approximately half that in the animal species. Microradiography confirmed subsurface demineralization in all four species. Similar depth ratios were seen in the scanning electron microscope, but there were structural differences between lesions in human and animal teeth. Lesions in bovine teeth were more like those in human, but lesions in equine and ovine teeth were markedly different. Substitution of these animal enamels for human enamel in caries experiments demands that these differences be taken into account. Scanning electron microscopy is capable of resolving features in artificial caries lesions which cannot be differentiated by polarized light techniques. The latter will demonstrate generalized mineral loss, but scanning electron microscopy is required to characterize the sites of mineral loss.

Adult↗
PubMed1991

Comparison of the plaque microflora from natural and appliance-borne enamel surfaces.

Human enamel sections and slabs, mounted on a mandibular removable appliance, were worn by 5 adult subjects for a 1-week period. Plaque was allowed to accumulate on the in situ test sites and on the adjacent natural dentition. At the end of the experimental period, the plaque microflora associated with (1) the enamel sections, (2) the enamel slabs, and (3) the acrylic base of the appliance test site was compared with that obtained from lingual and interproximal areas of the lower molar teeth. In addition, the acid anion and pH profiles of plaque obtained from both the exogenous and natural tooth surfaces were also determined. Although some quantitative differences were found between the proportions of isolates obtained from the different enamel surfaces, qualitatively the microflora was very similar, and no significant differences were found in the plaque lactate/acetate ratios or pH measurements following a sucrose mouthrinse. Thus, human tooth specimens mounted on the intra-oral device produced a plaque ecosystem similar to that present on the adjacent natural dentition, suggesting that the model is suitable for studies on early plaque development and the microbiology of enamel demineralization.

Acrylic Resins↗