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At least 397 records · Page 22Linked to original sources
PubMed1990

Clinical evaluation of three posterior composite and two amalgam restorative materials: 3-year results.

The clinical performance of three posterior composites and two amalgams was evaluated over 3 years. Three hundred and nine composites and 200 amalgams were reviewed at the 3-year recall. The following parameters were assessed: fractures, gingival condition, interproximal contacts, marginal adaptation, staining and colour match. Although there was no significant difference in the overall failure rate between the two types of material, there was a significantly higher incidence of fracture in the amalgam restorations. The amalgam failures were exclusively mechanical, whereas those affecting composites also included failures that were more biological in nature. A significantly higher proportion of the Class II composites failed to achieve an adequate approximal contact, but this was not reflected in a more adverse gingival response. Colour match, surface and marginal stain varied significantly within the composite group and appeared to be material-related. Overall, the materials Occlusion and P-30 were considered to be performing adequately. The clinical handling, colour match and radiopacity of Clearfil Posterior were considered to be unsatisfactory.

Color↗
PubMed1991

Dental treatment for children under general anaesthesia in day care facilities at a London dental hospital.

Day-stay facilities are gaining in popularity in general surgery, especially in surgery for children. In dentistry, day-stay care has been shown to be of great value for the treatment of specific groups of child patients, including handicapped and those too young to tolerate treatment with local anaesthetic alone. The present study considered the characteristics of 103 patients attending for treatment in the day-care facilities of the Eastman Dental Hospital, the morbidity of the technique and the acceptability of the service to those using it. Of the 103 patients, 46 were seen in the unit because they required minor oral surgery and 22 because of particular problems with management. Ninety-four patients had one or more symptoms following treatment. In at least 53 cases this related to the treatment and not to the anaesthetic. Despite a cost to the families in terms of money and time, the service proved acceptable to almost all of those who used it.

Anesthesia, Dental↗
PubMed1992

The adhesive amalgam--fact or fiction?

Forty molar and premolar teeth had non-retentive cavities prepared and restored with amalgam using (1) copal varnish (control), (2) a pin, (3) Amalgambond or (4) Panavia-Ex. The forces and energy required to dislodge the restorations were recorded and compared, and the mode of failure noted for each group. Although the pinned restorations required significantly higher loads to dislodge them, the mode of failure and energy required to dislodge the restorations in the Amalgambond and Panavia-Ex groups indicated that these types of restorations had significant advantages over pinned restorations, particularly where the pulp might be compromised. The film thickness of the retentive systems in these two groups, however, indicated a substantial operator or technique sensitivity.

Adhesives↗
PubMed1993

Dental anomalies--are adhesive castings the solution?

Adhesive cast restorations placed without tooth preparation were used to restore the teeth of patients affected by either amelogenesis or dentinogenesis imperfecta. Twelve patients aged between 7 and 18 years were treated and in total 64 cast restorations were placed. At the time of cementation, the vertical dimension was increased by the thickness of restorative material placed on the functioning surfaces of the restored teeth. Full occlusion was restored for all individuals, with only one casting being lost. The castings have been placed for intervals between 10 and 54 months.

Acrylic Resins↗
PubMed1993

A survey of patients seen in consultant clinics in conservative dentistry at Edinburgh Dental Hospital in 1990.

A baseline study of referrals by letter to a department of conservative dentistry staffed purely by honorary consultants was conducted for one year. Distinct differences were found between the majority of patients referred from general practice and those referred from other sources. Principal reasons for referral were problems of tooth replacement, appearance, endodontics and tooth wear. A predominance of female patients was seen in all groups except those complaining of tooth wear. 'Endodontic' patients featured the highest proportion of requests for hospital treatment. Complex restorative treatment was provided for the majority (70%) of referred patients, and about 10% received treatment from dental students. The rates of referral showed evidence of dependence on travelling distance to the referral centre but not on the availability of local GDPs. This emphasises the importance of maintaining existing specialist dental referral services in major population centres and the development of new services where appropriate.

Adult↗
PubMed1993

The release, absorption and possible health effects of mercury from dental amalgam: a review of recent findings.

Recently many articles have appeared on the subject of mercury from dental amalgam and some of these have questioned its safety as a dental material. This article reviews critically the evidence on mercury release from dental amalgam restorations, its absorption, accumulation and excretion by the body, and its possible relationship to ill-effects. Finally, brief recommendations are given for the handling and usage of dental amalgam.

Abnormalities, Drug-Induced↗
PubMed1994

Palatal inlays.

Explore the source record for details and available documents.

Bulimia↗
PubMed1995

Reinforcement of weakened cusps by adhesive restorative materials: an in-vitro study.

Pairs of extracted premolar teeth were prepared with MOD cavities reducing the lingual cusp at its base to one of five widths: 1.25-2.25 mm. One of each pair was then restored with one of five adhesive restorative techniques and the weakened cusp of both teeth fractured by a force applied to the cusp at an angle of 30 degrees to the long axis of the tooth. At all cusp widths a layered restorative technique in which the cavities were filled to the enamel-dentine junction with glass-ionomer cement and the enamel replaced by composite, reinforced the weakened cusp more than the other restorative materials tested. This combination of materials to reinforce weakened cusps is worth considering as a cost effective alternative to removing the cusp entirely and making a crown or protecting the cusp with a cuspal coverage gold inlay.

Adhesives↗
PubMed1997

The future of dental amalgam: a review of the literature. Part 7: Possible alternative materials to amalgam for the restoration of posterior teeth.

This is the last in a series of articles on the future of dental amalgam. It considers possible alternative materials to amalgam for the restoration of posterior teeth. The materials discussed are gold inlays, gold foil, gallium alloys, and tooth coloured non-metal alternatives including glass-ionomer cements, composite resins, glass-ionomer-resin hybrids, compomers and ceramics. The clinical indications for these restorations are first described along with their potential clinical problems and their mean survival rates in comparison with dental amalgam. Secondly, the safety of composite resins is considered and potential toxic and hypersensitive effects of these materials are discussed. Finally, it is concluded that the present evidence does not appear to demonstrate that dental amalgam is hazardous to the health of the general population. It does, however, recommend that in continuing to use amalgam dentists must use strict mercury hygiene procedures to avoid risk to their staff and contamination of the environment. It seems that mercury contamination of the environment is likely to be the main reason for any future government action against the continued clinical use of dental amalgam.

Air Pollutants, Occupational↗