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Results for “TOOTH ABRASION”

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At least 19 recordsLinked to original sources
PubMed1990

[Evaluation of air-powder abrasive system on tooth abrasion].

The maintenance of good oral hygiene in patients with or without prosthesis has been one of the essential parts of the total oral health care. Recently a redesigned air-powder abrasive system was introduced to remove dental plaque and stain from tooth surfaces. This study was designed to evaluate effects of this device on the cementoenamel junction area quantitatively and qualitatively by using the Michigan Computer Graphic Coordinate Measuring system (MCGCMS) and scanning electron microscopy (SEM) after exposure to an air-powder abrasive device. A tooth specimen was exposed to a Cavi-Jet (Dentsply International Inc., York, PA) for 10, 30, 90 seconds intervals. The MCGCMS was utilized before and after treatment of the specimen at each time interval to measure the depth abrasion of the tooth material, and SEM pictures were taken after 90 seconds treatment of the specimen to evaluate surface characteristics. Following conclusions were drawn within the limits the confines of this study. 1. An air-powder abrasive device abrades cementum rapidly and should be used carefully below cementoenamel junction. 2. There was no significant change on the enamel surface quantitatively. 3. The MCGCMS reproduces and measures experimental points accurately.

Air↗
PubMed2002

Iatrogenic tooth abrasion comparisons among composite materials and finishing techniques.

STATEMENT OF PROBLEM: Many different rotary instruments are available for shaping composite restorations. Whether use of these instruments causes undesirable iatrogenic abrasion of either the tooth surface or the composite restorative material is unknown. Assuming that damage occurs, which technique is least damaging is unknown. PURPOSE: This in vitro study quantified the loss of surface enamel and dentin surrounding Class V preparations during composite shaping and finishing procedures. The susceptibility of 2 types of composites to tooth abrasion was also examined. MATERIALS AND METHODS: Standardized Class V cavities were prepared at the amelodentinal junction of 36 human molar teeth. The teeth were randomly assigned to 6 groups of 6 teeth each. They were restored with either a low- or high-viscosity composite (Revolution or Prodigy Condensable, respectively) and finished with aluminum oxide disks, tungsten carbide burs, or ultrafine finishing diamond burs. The preparations were profiled before and after restoration. After each finishing procedure, morphological measurements of surface changes in the dentin and enamel were made and reported as volume (in cubic millimeters); maximum depth, mean maximum depth, and mean depth (in micrometers); and surface area (in square millimeters). The results were subjected to a 2-way analysis of variance for restorative material and finishing technique (P<.05). RESULTS: Aluminum oxide disks removed significantly less enamel than tungsten carbide burs or ultrafine finishing diamond burs, as measured by volume, maximum depth, mean maximum depth, mean depth, and surface area (P<.05). Conversely, aluminum oxide disks removed significantly greater dentin than either tungsten carbide burs or ultrafine finishing burs as measured by loss of volume, mean depth, and surface area (P<.05). There was no significant difference in the loss of surrounding tooth substance based on resin type (low or high viscosity). CONCLUSION: Within the limitations of this study, the 3 finishing systems tested resulted in varying degrees of iatrogenic abrasion of enamel and dentin. The composite material used had no significant effect on abrasion of the surrounding enamel or dentin.

Aluminum Oxide↗
PubMed1995

Occupational tooth abrasion in a dental technician: loss of tooth surface resulting from exposure to porcelain powder--a case report.

A dental technician suffered abrasion of his anterior teeth because of his technique of handling porcelain powder during the construction of restorations. To keep the brush moist, he habitually licked it as he applied porcelain powder to restorations. The porcelain powder, which is extremely abrasive, acted as a grinding powder between his maxillary and mandibular anterior teeth. Adjunctive orthodontics and a combination of adhesive, minimal-intervention restorations were used to create an esthetic and functional solution.

Adult↗
PubMed2003

[Clinical study on the relationship between tooth abrasion and the habits of chewing betel nut].

OBJECTIVE: To investigate the relationship between tooth abrasion and long-term chewing betel nut. METHODS: The time, frequency, clinical features of occlusal abrasion, and results of pantomography were studied in 64 patients with the habits of chewing betel nut. RESULTS: The occlusal surfaces of all patients had abrasion from mild to severe. The longer the chewing time, the more severe the occlusal abrasion (P < 0.01). The occlusal abrasion became more severe with the increase in chewing frequency (P < 0.01). The severe abrasion was accompanied with periapical periodontitis and the resorption of alveolar bone. CONCLUSION: Long-term chewing betel nut can result in the abrasion of occlusal surface.

Adult↗
PubMedDate not supplied

[Elevated tooth abrasion in people of older age groups].

Specific features of tooth abrasion were studied in 105 patients aged 46-65 with the use of special questionnaires and Smith and Knight's abrasion index. Mandibular teeth were characterized by a higher abrasion level, the first and second right molars wearing down the first. Of the maxillary teeth the frontal ones were worse worn down. Potable water enrichment with fluorine (up to 2 mg/l) did not reduce the level of teeth abrasion.

Age Factors↗
PubMed2002

Tooth abrasion in unilateral posterior crossbite in the deciduous dentition.

The aim of this study was to evaluate the degree of abrasion in posterior teeth of subjects with unilateral posterior crossbite in the deciduous dentition. A group of 54 untreated subjects in deciduous dentition (test group, TG) was selected from a parent sample of 1500 patients from the files of the Department of Orthodontics of the University of Florence. A sample of 20 subjects with normal occlusion in the deciduous dentition was selected as the control group (CG). As experimental units in TG, 54 crossbite sides (CB, consisting of 33 right and 21 left crossbite sides) and 54 noncrossbite sides (NCB) were used. In CG, one randomly chosen single side for each subject (NCBC) was used for comparisons. The findings of the present study indicated that subjects with unilateral crossbite in the deciduous dentition showed a significantly smaller degree of dental abrasion in the crossbite side when compared with both the opposite side and control group sides. The lack of abrasion in crossbite sides was primarily due to a significantly lesser degree of abrasion of the upper deciduous canines.

Case-Control Studies↗