Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “Tooth Preparation”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 1,333 records · Page 74Linked to original sources
PubMedDate not supplied

A clinical investigation on three-unit fixed partial dentures fabricated with a lithium disilicate glass-ceramic.

A lithium disilicate glass-ceramic material has recently been developed for the fabrication of 3-unit fixed partial dentures. Conducted on 60 restorations, this initial trial attempted to define clinical indications and establish design principles for fixed partial dentures fabricated of this ceramic material. The design requisites varied depending on placement on the arch, and the authors concluded that lithium disilicate restorations caused reduced antagonist structure or opposing tooth wear. This investigation demonstrated that when a novel ceramic system was utilized for 3-unit restorations replacing up to the first premolar and attained minimal criteria for connector dimensions, an acceptable clinical success rate was achieved.

Adult↗
PubMed1998

A new all-ceramic post and core system: clinical, technical, and in vitro results.

Root-filled teeth with fractured or discolored coronal aspects invariably need to be restored by crowns. The prepared abutment tooth is usually reinforced by a metallic post and core system. The grayish discoloration of the root, and consequently of the gingiva, caused by the metal color may be an enormous esthetic disadvantage in the anterior teeth. In 1993 ceramic posts made of zirconia were introduced by the authors, allowing a new all-ceramic concept for nonvital abutment teeth. A new ceramic post and core system has now been developed with the idea of further improving esthetic appearance. In this system the core material is heat pressed directly onto the zirconia post. This article describes the material and the fabrication procedures (chairside and in the laboratory) of the system. Clinical results are presented. The retention of the core material is evaluated by in vitro tests.

Aluminum Silicates↗
PubMed1997

Removable partial denture design considerations where periodontally compromised teeth exist.

Restoration of a periodontally compromised dental arch with a removable partial denture may require one or more design modifications. Multiple rests ensure that adequate vertical support remains in the event primary abutment teeth are lost. An open or closed base can be strategically placed in the maxillary major connector to facilitate the replacement of subsequently lost teeth. The location of finish lines can be modified to provide a smoother resin-to-metal transition when posterior teeth are lost. Wire direct retainers that provide more physiologically acceptable clasping of compromised teeth and that are easily adjusted and added to the prosthesis should be considered.

Dental Abutments↗
PubMed1996

A survey of dental airlines and an examination of tooth-drying techniques.

The aims of this study were: 1. To assess the prevalence and severity of water and oil contamination in 20 dental airlines in clinical use, using a commercial test kit, LP Aerotest. 2. To determine the effect, in vitro, of such contamination on the shear bond strengths to etched bovine enamel, of composite resin and a dedicated bonding agent. The enamel was dried using either an oil-and-water-contaminated 3-in-1 syringe, a warm-air tooth-dryer, silica gel-dried air or blotting paper, prior to bonding. A total of 11 (5 mm diameter) composite discs were bonded in each group. The samples were shear tested 72 hours later at a cross-head speed of 50 mm/min. All airlines had > 100 mg/m3 water and traces of oil (< 0.5 mg/m3) were present in 50% of samples. The mean shear bond strengths (MPa) for the 3-in-1 syringe, tooth-dryer, dried air and blotting paper-dried teeth were 14.5 +/- 3.8, 19.0 +/- 2.6, 19.6 +/- 4.2 and 19.7 +/- 1.9 respectively. The differences between the values for the tooth dryer, dry air and blotting paper were not significant (P > 0.01) but a significant difference (P < 0.01) was observed between these and the 3-in-1 syringe.

Air↗
PubMedDate not supplied

Load fatigue of five restoration modalities in structurally compromised premolars.

Twenty-five freshly extracted maxillary first premolars were divided equally among five modalities for rebuilding structurally compromised premolars. These modalities were: (A) buccal stainless steel Parapost/amalgam core, (B) palatal stainless steel parapost/amalgam core, (C) two stainless steel Paraposts/amalgam core, (D) two regular Link Plus TMS single-shear Minim pins/amalgam core, and (E) palatal cast gold post and core. Load fatigue was used as the testing protocol, using a 5.2-kg load applied at 72 cycles per minute. Each tooth was prepared with a 1.0-mm ferrule, and an upper limit of 250,000 load cycles was set for the testing. Two failures were exhibited, (1) preliminary failure which involved a crack in the luting cement layer, and (2) catastrophic failure wherein the core and crown separated from the root section. Statistical analysis using Kruskal-Wallis test showed three subsets (P < or = .05). The subset with the highest number of load cycles to failure contained the palatal stainless steel post/amalgam core, two stainless steel Paraposts/amalgam core, and palatal cast gold post and core.

Bicuspid↗
PubMed1998

Class I occlusal composite resin restorations: in vivo post-operative sensitivity, wall adaptation, and microleakage.

PURPOSE: To investigate the effect of restoration technique and adhesive system on the post-operative sensitivity and marginal adaptation of Class I occlusal composite resin restorations placed in vivo. MATERIALS AND METHODS: 48 Class I cavities were restored in vivo according to one of three protocols: (1) Scotchbond Multi-Purpose/P50 placed in increments; (2) Scotchbond Multi-Purpose/P50 placed in bulk, and (3) Clearfil Liner Bond 2/Clearfil Ray Posterior placed in bulk. Post-operative sensitivity and sensitivity on loading were recorded 5-7 weeks after placement of the restorations; the teeth were cautiously extracted, immersed in a dye solution and sectioned. SEM observations were made from epoxy resin replicas. Microleakage and gap formation was assessed. RESULTS: No differences among adhesive systems or restoration procedures were found for microleakage. Post-operative sensitivity was reported in 14% of all teeth but was absent in the Clearfil Liner Bond 2 group. Sensitivity on loading was experienced by patients in 56% of the restorations. Group 1: nine teeth; Group 2: 15 teeth; Group 3: three teeth. Differences were statistically significant for all three groups. The SEM analysis showed that restorations placed in two layers showed less gaps than restorations placed in bulk.

Acid Etching, Dental↗
PubMed1999

[The Procera Allceram all-ceramic system. The clinical and technical laboratory aspects in the use of a new all-ceramic system].

The aim of this article was to present the CAD/CAM-assisted Procera system as a new all-ceramic full-coverage crown system. New technologies need to be evaluated technically and clinically to be able to fulfill the requests for aesthetics, physical strength and biocompatibility when restoring the anterior and posterior region. The Procera AllCeram system offers the opportunity to fabricate densely sintered, high-purity, tooth-colored copings. Mechanical properties of the Procera alumina coping, indications and contraindications and additional applications are discussed. The clinical and technical procedures and any specific limitations and peculiarities are summarized and documented with clinical cases in a step-by-step illustration.

Cementation↗
PubMed1998

Case report: the high proximal survey line.

This case report demonstrates a method of adding composite to a tooth to move a high survey line closer to the gingival margin. The purpose of this modification is to facilitate clasping.

Composite Resins↗
PubMed1996

The use of removable partial dentures amongst private dental practitioners in Singapore.

A questionnaire survey was carried out in 1995 amongst university trained general dental practitioners in the city state of Singapore to assess the use of removable partial dentures (RPD). 37% of the original sample of 469 completed and returned the questionnaire. The results of this survey indicate that RPDs are a common treatment modality in Singapore. Acrylic partial dentures appear to be the preferred choice for RPD treatment. The work profile of those who had a postgraduate qualification in removable prosthodontics did not differ from that of the general dental practitioner.

Acrylic Resins↗