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Results for “Tooth Attrition”

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PubMed2006

One-year clinical evaluation of two resin composites, two polymerization methods, and a resin-modified glass ionomer in non-carious cervical lesions.

AIM: The aim of this study was to examine clinically relevant data on four restorative procedures for non-carious cervical lesions using United States Public Health Service (USPHS)-compatible clinical and photographic criteria and to compare different methods of analyzing clinical data. METHODS AND MATERIALS: Fourteen patients with at least one or two pairs of non-carious lesions under occlusion and a mean age of 50 were enrolled in this study. A total of 56 restorations (14 with each material) were placed by three experienced, calibrated dental practitioners. Two other experienced and calibrated practitioners, under single-blind conditions, followed up on all restorations for a period of one year. Three materials were randomly placed: a micro-hybrid composite with two polymerization methods (G1 and G2), a flowable micro-hydrid composite (G3), and a resin-modified glass ionomer (G4). Statistical analysis was performed using the Kruskall-Wallis test (p<0.05) and a Mann-Whitney U modified test with a corrected significance level. RESULTS: At the one year evaluation time, there were no restorations with secondary caries and the retention rates in G1 (IntenS with a hard polymerization), G2 (IntenS with a soft polymerization), G3 (Filtek flow), and G4 (Fuji II LC) were 85.7% (two losses), 92.8% (one loss), 100%, and 100%, respectively. The total visual comparison of the results at baseline (15 days later) showed significant differences only with the clinical acceptance criterion: G1 was different from G2, with a soft polymerization device (p<0.05). In terms of surface quality at one year, G1, G2, and G3 exhibited a statistically significant difference from G4, p<0.05. The digital analysis at baseline showed significant differences only with the clinical acceptance criterion: G1=G2 was different from G3=G4, p<0.05. At one year, only the microporosity criterion showed any statistical differences: G1=G2=G3 was different from G4, p<0.05. CONCLUSIONS: The resin-modified glass ionomer was easier to use and had a high retention rate, but it failed in terms of surface quality (visual mode) and porosity (digital mode) criteria compared to the others groups. Overall results showed no difference between groups G1 (hard-polymerized) and G2 (soft-polymerized), and only G1 was affected by the marginal edge (p<0.03) and integrity criteria (p<0.02) at one year.

Bisphenol A-Glycidyl Methacrylate↗
PubMedDate not supplied

Impact of tooth wear on daily living.

PURPOSE: The aim of this study was to identify the effects of tooth wear on patients' quality of life and satisfaction with their dentition. MATERIALS AND METHODS: Seventy-six tooth wear patients and 76 control subjects were recruited for the study. A Dental Impact on Daily Living questionnaire was used to assess the affect of tooth wear on daily living and satisfaction with the dentition. An ordinal scale was used to assess the severity of tooth wear in a patient cohort. RESULTS: The results showed that tooth wear has a measurable impact on patients' satisfaction with their appearance, pain levels, oral comfort, general performance, and chewing and eating capacity (P < .001). CONCLUSION: Tooth wear has an impact on patients' satisfaction with their dentition regardless of tooth wear severity or personal factors.

Activities of Daily Living↗
PubMed2006

Porcelain veneers.

Explore the source record for details and available documents.

Dental Porcelain↗
PubMed2006

In vitro wear evaluation of dental materials in primary teeth.

PURPOSE: To evaluate the effect of dental materials on primary enamel wear. METHODS: Four composites (Filtek Z250, Heliomolar, Point 4, SureFil), two compomers (Dyract AP, F2000) and a resin-modified glass-ionomer (Vitremer) were placed into box-shaped preparations in buccal surfaces of primary molars and stored for 24 hours in water at 37 degrees C. The specimens (n = 6) were subjected to abrasive three-body wear against a primary enamel cusp. Material wear, enamel wear (adjacent to the material), and wear on enamel cusps were estimated by profilometry and video-analysis software. Results were compared with ANOVA and Tukey's tests (P < 0.05). RESULTS: Vitremer showed the highest wear (P < 0.05), followed by Dyract AP and F2000, which were not statistically different (P > 0.05). There was no significant difference between Filtek Z250 and Dyract AP (P > 0.05). Filtek Z250, Heliomolar, Point 4 and SureFil, showed the lowest wear values and there was no difference among them (P > 0.05). The highest wear values on the enamel adjacent to the material were found with Dyract AP (P < 0.05) and the lowest next to Point 4 and SureFil (P < 0.05). There was no difference in the wear of the enamel next to Vitremer, F2000, Heliomolar and Filtek Z250 (P > 0.05). Vitremer and F2000 caused the highest wear on enamel cusps (P < 0.05), and there was no statistically significant difference (P > 0.05) between them; SureFil caused the lowest wear (P < 0.05) on the opposing enamel. There was a correlation (r = 0.85) between wear of materials and wear on the enamel cusps, but not (r = 0.53) for the wear on enamel besides the restoration and wear on enamel cusps. SEM micrographs showed different surface characteristics of the materials after the wear test.

Analysis of Variance↗
PubMed1989

[An experimental study on change on the contralateral temporomandibular joint after unilateral condylectomy on one of the bilateral joints].

In this study I examined the macroscopic, radiological and histopathological changes on the contralateral temporomandibular joint following condylectomy on one of the bilateral temporomandibular joints on adult female Macaca fuscatas. I made a standardized radiographic apparatus for the temporomandibular joint and head for the Macaca fuscata on an experimental basis for radiological observation through the whole passage of time before making the experiment. The results were as follows: 1) In macroscopic observation, I noticed the entire mandible directed toward the operated side at opening the mandible and the anterior and molar (unoperated side) open bite after the operation. Besides the masticatory side altered and the degree of tooth attrition made progress with the passage of time. 2) According to radiographic investigation with an anteroposterior radiograph, complicated shift and rotation of the mandible were observed since the operation. According to the radiograph of condyle, distal displacement of the temporomandibular joint, widening of joint space and clockwise rotation of the mandible were confirmed. A shadow of bone was found in the articular surface of the mandibular head on the 123rd day. 3) The following findings were obtained in histopathology. (1) Heterotopic calcification appeared in an articular disk of one Macaca fuscata in control group and two in the 83rd-day-passaged Macaca fuscatas. (2) In the articular disk and the tissue around them, a tiny projection of connective tissue appeared in the posterior synovial portion of the superior articular cavity on the 10th day. And the intermediate zone of the articular disk showed itself to be fibrous small bundle daily as days passed on and cartilaginoid cells were found. (3) In the front edge of mandibular corpus and attachment region of the lateral pterygoid muscle, absorption of bone was observed by the 40th day from the operation, and additions of bone were observed during the period between the 40th and 83rd days from the operation. (4) The thickness of the cartilaginous lamina of mandibular head and fibrous velum varied much in different periods and areas. In the 83rd-day-passaged sample, osteosclerotic change and the irregularity on the articular surface were remarkably noticed. On the 123rd day the back of the mandibular head and the contralateral front wall of the back of the articular process showed absorption of the bone on a large part. (5) A large part of the articular surface in articular tubercle was irregular and some osteosclerotic change was observed. And on the 83rd day a good number of clones of cartilage cells were found.

Animals↗
PubMed1995

Non-carious cervical tooth loss: Part 1.

Non-carious cervical tooth loss is not always attributable to a single causative factor, as evidenced by the numerous terminologies used. In this, the first of two articles, the aetiology and prevalence of non-carious tooth loss are discussed. Guidelines are suggested as to how it may be diagnosed, prevented and monitored. A further article will cover the restorative management.

Adult↗
PubMed1996

Retrospective audit of patients with advanced toothwear restored with removable partial dentures.

The dental records of 50 patients with advanced tooth wear restored with removable prostheses were examined. Retrospective data were collected with regard to source of referral, presenting complaint, aetiological factors, clinical features, dentures provided, details of failures and maintenance. The maximum follow up period was three years. The ratio of male to female patients was 4:1 and the age range 31-75 years. Failures were recorded in 38% of patients with provisional and 64% with definitive dentures. The most common failure was fracture or wear of the incisal or occlusal surfaces. The majority of failures were addressed by adjustment of the dentures and the audit confirmed the need for regular maintenance.

Adult↗
PubMed1996

Form, function and strength in the restored dentition.

The masticatory system is a biomechanical engine for the reduction of food before final absorption by the alimentary canal. These demands may lead to biological changes dominated by wear, fracture, or plastic deformation. This in turn lead to the loss of hard tissue, which is detrimental to the primary function of the oral cavity. The primary roles of restorative dentistry are to restore what is lost and to preserve remaining hard tissue, which is served by conservative techniques and the development of materials that recover the function of lost tissue. The criteria for new restorative materials should be based on the structure-property-function relationships of the hard tissues. An understanding of these relationships may lead to better methods of assessment and provide clues for the development of better synthetic analogues for enamel and dentine.

Bicuspid↗
PubMed1997

Wear now? An update on the etiology of tooth wear.

Tooth wear is an ever-increasing problem, and younger patients are particularly at risk. The problem is likely to continue as patients' demands and expectations rise and as more natural teeth are retained into old age. The etiology of tooth wear is reviewed, with emphasis on those factors that appear to be major contributors to the problem at the moment. The clinical appearance of tooth wear is also discussed. It would appear that erosive factors are a significant cause of tooth wear. The prominence of acidic damage of tooth tissue is probably a reflection of society's concern with healthy eating and appearance.

Humans↗
PubMed1998

Restoration of the severely worn dentition using a systematized approach for a predictable prognosis.

Dental literature supports the concept that vertical dimension of occlusion is normally not lost in severely worn dentition, and the bite should generally not be opened to facilitate dental reconstruction. However, restoration of a periodontally sound but severely worn dentition, at existing vertical dimension, frequently presents unique challenges in patient management, diagnosis, treatment planning, and restorative methodology. This report reviews and demonstrates an integrated and planned approach to this complex treatment situation that can lead to a favorable and predictable prognosis. The approach also allows a practitioner free use of various techniques if certain goals of occlusion are followed.

Crowns↗
PubMed1998

Crown lengthening: the periodontal-restorative connection.

Crown lengthening procedures are based on biologic principles that can be determinants for successful treatment. These procedures are fixed on an understanding of the biologic width. A few of the indications for crown lengthening are caries beneath the gingival margin, fractured teeth with insufficient clinical crown exposure, and teeth with excessive occlusal or incisal wear. This article describes flap designs, the use of a new bur probe for precise measurement of clinical crown exposure, and suturing methods for flap stabilization. Clinical documentation of patients with various clinical situations requiring crown lengthening is presented.

Crown Lengthening↗
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

Orthodontics and the creation of localised inter-occlusal space in cases of anterior tooth wear.

Creation of inter-occlusal space using conventional orthodontics can be achieved by a number of techniques. It is important that the most appropriate is chosen for each clinical case. Failure to do so may result in protracted treatment or ultimate failure. Alternative orthodontic techniques may offer advantages over conventional techniques in some circumstances. However, they should be seen as replacement for conventional methods, rather as an extra option for some patients. For all treatment options it is important that the orthodontist works closely with his restorative colleagues to ensure that the correct and most appropriate treatment option is chosen.

Cuspid↗