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Results for “TOOTH ABRASION”

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At least 685 records · Page 38Linked to original sources
PubMed1997

Restorative dental treatments of abraded canine teeth in a Sumatran tiger (Panthera tigris sumatrae).

A Sumatran tiger had developed severely abraded canine teeth by biting on cage-bars. This resulted in weakening and marked sensitivity of the teeth. Indications for, techniques of and complications of restorative dental treatments are described. The outcome of different restorative dental treatments indicates that endodontic treatment should be carried out first if the fracture of a weakened tooth is anticipated. To improve retention, the acid-etch technique is preferred in combination with macroretentive preparations. In this case, amalgam was used successfully in combination with composite resin to restore function to a canine tooth with a large distal defect.

Animals↗
PubMedDate not supplied

Microleakage of sealants after conventional, bur, and air-abrasion preparation of pits and fissures.

PURPOSE: The aim of this study was to compare the microleakage of unfilled and filled sealants after conventional, bur, and air-abrasion tooth preparation. METHODS: Seventy-two extracted molars were randomly divided into three groups. In group 1, 24 teeth were prepared by pumicing and acid etching with 37% phosphoric acid. In group 2, 24 teeth were prepared with a 1/4-round bur in a low-speed handpiece and then acid etched. In group 3, 24 teeth were prepared by high-speed (160 PSI) microabrasion using 50 mu alpha alumina particles in a KCP 2000 machine. In each group, 12 teeth were sealed with a filled sealant and 12 teeth with an unfilled sealant. All the teeth were stored in artificial saliva for 7 days and thermocycled for 2000 cycles. Teeth were then sealed apically and coated with nail varnish 1 mm from the margins and stained in 1% methylene blue for 24 h. Each tooth was sectioned in three locations and ranked (0-3) for microleakage. RESULTS: There were 216 sections and 66% showed no leakage. CONCLUSIONS: Chi-square statistical analysis of the data led to the following conclusions: 1) superior results were obtained when the tooth surfaces were prepared by a bur, 2) conventionally and KCP 2000-prepared tooth surfaces yielded similar results, and 3) the unfilled sealant was superior to the filled sealant.

Acid Etching, Dental↗
PubMed1997

The epidemiology of tooth wear.

There is a perception within the dental profession that the problem of pathological loss of tooth tissue is increasing. However, methods used to measure tooth wear are often complex and not reproducible. This fact, together with the lack of information on 'normal' loss of tooth tissue suggests that conclusions from current prevalence studies should be treated with caution.

Adolescent↗
PubMed1997

The aetiology and clinical appearance of tooth wear.

This paper highlights the importance of recognising that tooth wear has invariably a multifactorial aetiology, although the clinical appearance may suggest a single contributory factor. Failure to do so may lead to continued loss of tooth tissue and ultimate failure in restorative care. The possible aetiological factors are highlighted and suggestions as to the cause of the increasing problem are discussed.

Beverages↗
PubMed1997

Fixed prostheses in the treatment of tooth wear.

The restorative implications of tooth wear are often complicated by the age of the patient, the destructive nature and aesthetic compromise of conventional fixed restorations and the lack of inter-occlusal space. This paper focuses on the fixed prosthetic treatment options for such patients and the utilisation of fixed restorations to create inter-occlusal space.

Ceramics↗
PubMed1997

The role of removable prostheses and implants in the restoration of the worn dentition.

A variety of removable prostheses is available to restore the dentition which exhibits wear and extensive loss of teeth from the arch. Such treatment may be either interceptive or transitional in order to stabilise the occlusion or definitive as part of rehabilitation. Tooth surface loss may necessitate crowning with the provision of conventional removable partial dentures or decoronation and the use of overdentures. Extensive loading generated by parafunction is often considered to risk the failure of restorations stabilised by implants and so may contra-indicate treatment. Screening out unsuitable cases appears to result in few incidents of implant failure and new designs may further reduce the risk.

Dental Prosthesis, Implant-Supported↗
PubMedDate not supplied

Toothwear: aetiology and presentation.

A worn dentition is a frequent clinical finding and presents two major challenges to the dental team. The first challenge is to ascertain the cause of the toothwear, the second is its management. This paper aims to present an overview of aetiologies associated with toothwear.

Carbonated Beverages↗
PubMedDate not supplied

Dental microwear. Morphological, functional and phylogenetic correlations.

Dental wear, at first considered a pathological condition, is now regarded as a physiological mechanism of teeth adaptation to continuous masticatory stresses. Excessive wear is limited by characteristic structural adaptations of dental hard tissues showing a phylogenetic trend and specialisation. Enamel is the main tissue subjected to wear; however, advanced enamel wear exposes increasingly large areas of dentine. Enamel hardness and anisotropy are the major factors contrasting wear and microfractures. Anisotropy is mainly related to the different orientation of prism bundles (and of hydroxiapatite cristals). Enamel wear development is also related to differences in microhardness, density, mineral composition and protein distribution. Masticatory loads distributed along the enamel-dentine junction uniformly disperse in the underlying dentine. In spite of its structural characteristics, dentine is relatively isotropic by the functional point of view. Even if its lower hardness opposes less efficaciously to wear, its biomechanical characteristics successfully contrast microfractures. The study of microwear (namely the microscopic analysis of worn dental surfaces) can be made both on original surfaces and on high definition silicone-resin replicas. Scanning electron microscope observations allow identification of surface damage (microtraces) produced by different physical and chemical agents. Microwear analysis may provide indications about alimentary and non alimentary habits, masticatory biomechanics and pathological situations (e.g., bruxism).

Animals↗
PubMedDate not supplied

The dental status of asthmatic British school children.

PURPOSE: This study was performed to determine the prevalence of dental disease in British school children with asthma. METHODS: A convenience sample of 100 asthmatic children (aged 4-16 years) was examined for dental caries, periodontal condition, and tooth surface loss. School children, equated for age, sex, race, and socioeconomic status were chosen for comparison. Children were divided into two age ranges; 4-10 and 11-16 years. A significant difference was found in DMFT (0.96 vs. 0.31) and DMFS (1.37 vs. 0.37) between the 4-10-year-old asthmatic children compared with healthy control children. RESULTS: In the 11-16-year age range, the asthmatic children had a DMFT and DMFS of 2.48 and 3.39 compared with the control children who had a DMFT and DMFS of 1.11 and 1.97 respectively. Asthmatic children had significantly more plaque, gingivitis, and calculus compared with the control group. There was a significant difference in the severity and number of teeth affected by tooth surface loss affecting labial surfaces of the anterior teeth and occlusal surfaces of the posterior teeth of asthmatic children. CONCLUSIONS: It was concluded that asthmatic children have more decay affecting their permanent teeth, poorer periodontal status, and more tooth surface loss than healthy controls.

Age Factors↗
PubMed1998

Toothwear: management.

The management of toothwear encompasses a broader approach than the active treatment of the problem, taking in as it does both passive and active interventions. This paper gives guidelines on how to assess and broadly manage toothwear rather than specific examples of treatment.

Bruxism↗
PubMed1998

Association of occlusal, periodontal, and dietary factors with the presence of non-carious cervical dental lesions.

PURPOSE: To investigate in vivo the relationship of occlusal stress factors, periodontal health status, and acidic dietary patterns to the presence of non-carious cervical lesions (NCCL) in a convenience sample of undergraduate clinic, adult dental patients. MATERIALS AND METHODS: Forty three subjects who met the entry criteria were admitted into the study; 178 teeth exhibiting NCCL were evaluated. A dietary assessment focusing on acidic food/beverage intake was used to evaluate nutritional intake over the most recent 24-hour period. Periodontal evaluation included intraoral measurement of gingival attachment loss, assessment of tooth mobility, and radiographic interpretation of percent bone loss using the Schei ruler method. Among the occlusal factors evaluated were shape and orientation of NCCL, presence and location of wear facets, and symptoms and characteristics of centric and eccentric occlusal function. RESULTS: 95% of teeth examined exhibited functional wear facets, indicating a systematic relationship with presence of NCCL (Chi Square = 16.9, P < 0.0001); 48% displayed buccal or incisal facets; 64% were accompanied by balancing interferences in lateral excursion; 98.3% had mobility scores < or = 1; there was no significant association between mobility and facets present (Chi Square = 3.04, P = 0.21); and, no relationship with dietary patterns was found. Group function, that may evolve with age, and/or traumatic occlusion factors may be related to etiology of NCCL. Longitudinal controlled clinical trials are needed to confirm suspected etiologies and establish treatment guidelines for non-carious cervical lesions.

Adult↗