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At least 775 records · Page 43Linked to original sources

PubMed2007

Influence of fluoride dentifrice on brushing abrasion of eroded human enamel: an in situ/ex vivo study.

This in situ/ex vivo study assessed the effect of fluoride dentifrice on eroded enamel subjected to brushing abrasion. In a crossover study performed in 2 phases, 10 volunteers wore acrylic palatal appliances, each containing 3 human enamel blocks. Dentifrice was used to brush the volunteers' teeth and the specimens subjected to abrasion. In phases A and B the dentifrices used had the same formulation, except for the absence or presence of fluoride, respectively. The blocks were subjected to erosion by immersion of the appliances in a cola drink for 5 min, 4 times a day. Then the blocks were brushed, and the appliance was replaced into the mouth. Enamel alterations were determined using profilometry and percentage change in surface microhardness (%SMHC) tests. The data were tested using the paired t test. The mean wear values (+/-SD, microm) were: group A 6.84 +/- 1.72 and group B 5.38 +/- 1.21 (p = 0.04). The mean %SMHC values (+/-SD) were: group A 54.6 +/- 16.2 and group B 45.7 +/- 6.8 (p = 0.04). Fluoride dentifrice had a protective effect on eroded enamel subjected to brushing abrasion.

Adult↗

PubMed2001

The erosive effects of some mouthrinses on enamel. A study in situ.

BACKGROUND: There are both anecdotal clinical and laboratory experimental data suggesting that low pH mouthrinses cause dental erosion. This evidence is particularly relevant to acidified sodium chlorite (ASC) formulations since they have plaque inhibitory properties comparable to chlorhexidine but without the well known local side effects. AIM: Studies in situ and in vitro were planned to measure enamel erosion by low pH mouthrinses. The study in situ measured enamel erosion by ASC, essential oil and hexetidine mouthrinses over 15-day study periods. The study was a 5 treatment, single blind cross over design involving 15 healthy subjects using orange juice, as a drink, and water, as a rinse, as positive and negative controls respectively. 2 enamel specimens from unerupted human third molar teeth were placed in the palatal area of upper removable acrylic appliances which were worn from 9 a.m. to 5 p.m., Monday to Friday for 3 weeks. Rinses were used 2x daily and 250 ml volumes of orange juice were imbibed 4x daily. Enamel loss was determined by profilometry on days 5, 10 and 15. The study in vitro involved immersing specimens in the 4 test solutions together with a reduced acid ASC formulation for a period of 4 h under constant stirring; Enamel loss was measured by profilometry every hour. RESULTS: Enamel loss was in situ progressive over time with the 3 rinses and orange juice but negligible with water. ASC produced similar erosion to orange juice and significantly more than the two proprietary rinses and water. The essential oil and hexetidine rinses produced similar erosion and significantly more than water. Enamel loss in vitro was progressive over time, and the order from low to high erosion was reduced acid ASC, ASC, Essential oil, and hexetidine mouthrinses and orange juice. CONCLUSION: Based on the study in situ, it is recommended that low pH mouthrinses should not be considered for long term or continuous use and never as pre-brushing rinses. In view of the plaque inhibitory efficacy of ASC, short- to medium-term applications similar to those of chlorhexidine would be envisaged.

Adult↗

PubMed2007

An in vitro study on the effect of TiF(4) treatment against erosion by hydrochloric acid on pellicle-covered enamel.

The aim of this in vitro study was to examine the effect of fluoride treatment on pellicle-covered enamel exposed to an acidic challenge simulating gastric reflux. Sixteen bovine and 16 human teeth were sectioned into four pieces, divided into four groups: (1) control, (2) 2-hour pellicle, (3) TiF(4), and (4) 2-hour pellicle + TiF(4), and subsequently subjected to 3 ml 0.01 M HCl stepwise for 4 + 4 + 4 min. The acid was analysed for calcium by atomic absorption spectroscopy. TiF(4) reduced Ca release from enamel by 76, 57 and 56% following the 4 + 4 + 4-min acid exposures, respectively, in bovine and 44, 54 and 54% in human enamel. These results suggest that treatment of enamel with a TiF(4) solution, with or without pellicle removal, may provide protection for the enamel against acid attack.

Animals↗

PubMed2006

Interdisciplinary cooperation exemplified by two complex cases of enamel erosion.

OBJECTIVE: Students of the Frankfurt am Main University Hospital participate in an interdisciplinary instructional unit in which they are presented with complex interdisciplinary findings and previous diagnostic records that are discussed in the patient's presence. We have recently observed a growing number of patients presenting defects of dental hard tissue in the form of erosions, defined as a loss of dental hard tissue due to the frequent and direct effect of acids not involving micro-organisms. These patients also presented marked malocclusions. For the most part, the diagnoses involve operative dentistry, dental prosthetics, orthodontics, oral, maxillofacial and plastic surgery. The clinicians discuss causes and therapeutic alternatives, at which point the therapeutic course is determined in consultation with the patient. CASE HISTORIES: We present herein two exemplary cases complex in etiology, as well as in treatment planning and realization. The case descriptions illustrate the importance of interdisciplinary agreement and cooperation in difficult courses of therapy, illustrating that, in the interest of the patient, it makes sense to establish interdisciplinary networks.

Adolescent↗

PubMed1990

Microleakage of two new dentinal bonding systems.

Class V abrasion and erosion lesions restored with composite resin seem to be more susceptible to microleakage, because the gingival margin is usually placed in cementum and/or dentin. The purpose of this study was to evaluate the microleakage, in vitro, of two new dentinal bonding systems along with a positive and negative control. This study was accomplished using extracted human teeth and a calcium-45 radioisotope technique. The teeth were examined for microleakage at periods of 1 week, 6 months, and 1 year. The results at all time intervals indicated that the cavities restored with the new bonding agents and their respective composite resins leaked more than did the negative control, glass-ionomer cement.

Composite Resins↗

PubMed1994

Periodontal probes and probing.

Probing of the sensitive, soft periodontal tissues differs markedly from probing of the dental hard tissues and caries. Periodontal probing requires special skills as well as an understanding of the tissues being examined, the probing procedure and the use of an appropriately designed instrument. Periodontal probing seeks to complement the initial visual assessment of the status of the periodontal tissue. It has multiple roles: to assess the haemorrhagic response to physical pressure; to determine the presence of aetiological factors such as calculus, defective dental restorations and root erosion, and to determine the pocket dimensions. It is also essential that the periodontal tissues should not be traumatised during probing. These defined aims of probing can only be achieved by use of an instrument that is capable of performing these functions, is designed to be 'tissue friendly', suitable as a measuring instrument, and standardised to ensure reproducibility, particularly with respect to the recommended pressure of 20 g exerted during probing. In addition, the ideal probe should be suitable for use both in the clinical setting where precise data documentation is required on an individual patient basis, and for screening purposes, as in epidemiology. A probe designed to achieve these attributes

Dental Calculus↗

PubMed1990

The effectiveness of a dental/dietitian team in the assessment of bulimic dental health.

Individuals with bulimia nervosa have been found to experience a variety of dental complications. Because of purging behaviors and erratic food consumption, the oral manifestations of bulimia frequently include irreversible enamel erosion, xerostomia, and oral mucosal irritation. A pilot study was conducted to determine the effectiveness of the dental/dietitian team in assessing the dental health of individuals with bulimia. Control and bulimic subjects were compared. The results demonstrated a significantly different (p less than .05) intake of folacin-412 micrograms in controls compared with 207 micrograms in bulimic subjects. Control subjects were found to have significantly greater (p less than .05) amounts of calculus deposits on teeth; however, subjects with bulimia demonstrated a lower (p less than .05) saliva pH. We conclude that the collaborative effort of the dental/dietitian team was useful in the assessment of dental health. The team approach may also help to identify clients with bulimia and facilitate therapy.

Adult↗

PubMed2006

Does fluoride rinsing have an effect on teeth status? Evaluation of preventive dental health activities for the youth of Woudenberg, The Netherlands.

Surveys among primary school children of group 8 (mainly 12-year olds) in 1988/1989 and 1995/1996 revealed that the dental status in Woudenberg was worse than in other municipalities in the Eemland region. Therefore, several dental preventive activities were started in Woudenberg for children aged 0-12 years. This included fluoride rinsing and teeth brushing lessons at primary schools. So as to evaluate the effect of these school activities, a new survey was carried out in Woudenberg in 2004. The teeth status (DMF-S value, percentage sound teeth, percentage erosion) was investigated by examination. Information regarding dental hygiene behaviour and participation in teeth brushing lessons was obtained by questionnaire. Teeth status (measured by DMF-S value as well as percentage sound teeth) at rinsing schools in 2004 was significantly better than at the same schools in 1995/1996. Multivariate analyses revealed that fluoride rinsing for at least 3 years (besides educational level of parents) is the most determining factor for teeth status independent of other variables. Pupils who never rinsed with fluoride were almost four times more likely to have caries lesions than pupils who rinsed for at least 3 years. This study strongly indicates that long-term rinsing with fluoride has a positive effect on teeth status.

Adolescent↗

PubMed2000

Eighteenth and nineteenth century dental restoration, treatment and consequences in a British nobleman.

This paper examines unusual eighteenth and nineteenth century dental treatment and its consequences, in a nobleman excavated from beneath St. Nicholas' Church, Sevenoaks, Kent, UK in the early 1990s. This rare archaeological case exhibits erosion of dental enamel on the labial surface of all the anterior dentition. A programme of historical research suggests that this might be attributed to the application of an acid-based dental tincture or the use of an abrasive substance to whiten the teeth. Palliative treatment for the consequence of this application was prescribed by Dr Robert Blake of Dublin. Further, it bears witness to three dental restorations, two of gold and one tin. The two gold (foil) fillings are an occlusal in the upper-right second molar and a cervical on the labial surface of the upper left canine. The tin filling is an occlusal in the upper left second molar. Excavation of the carious tissue appears to have been undertaken using a spoon shaped implement.

Dental Caries↗

PubMed1992

Interfacial morphology of resin composite and shiny erosion lesions.

Ten shiny erosion lesions were divided horizontally, in vivo such that the gingival half was prepared and the incisal half remained unprepared. Both were etched simultaneously with 32% H3PO4 for 20 seconds, rinsed and restored using the All Bond wet technique and P50 composite. The teeth, which were extracted as part of a treatment plan, were sectioned vertically midway through the restorations. Polyvinyl siloxane impressions of the tooth/resin interface were taken and examined by SEM for the presence of gaps. The teeth were then demineralized and the fitting surfaces of the restorations were examined for resin penetration into the dentin. Results showed that there were no gaps present in any of the interfaces. The most proliferative and deep resin penetration occurred in the prepared/etched halves.

Bisphenol A-Glycidyl Methacrylate↗

PubMed2002

Sites of dental erosion are saliva-dependent.

Acid demineralization of teeth causes occlusal erosion and attrition and associated non-carious cervical lesions at sites relatively unprotected by saliva. Associations of occlusal pathology and cervical lesions were looked for in 450 patients with toothwear, and 174 subjects with cervical lesions were identified. Associations of occlusal attrition, or erosion, or no wear, with cervical lesions at 72 buccal and lingual sites were recorded from epoxy resin replicas of the subjects' dentitions (3241 teeth). Criteria used to discriminate occlusal erosion from attrition; and shallow from grooved and wedge-shaped cervical lesions were delineated by scanning electron microscopy (SEM). In the absence of occlusal pathology, cervical lesions were very rare (<1%). In the presence of occlusal pathology, cervical lesions were present in 27.71% of buccal sites as opposed to 2.61% of lingual sites. The commonest site of cervical lesions was the facial of maxillary incisors (36% of sites). The least common site was the lingual aspect of mandibular molars (1.7% of sites). These differences may reflect the normal protective role of serous saliva and salivary pellicle in a site-specific manner, on the lingual surfaces of mandibular teeth particularly, and do not support abfraction as the prime aetiology of cervical lesions.

Adult↗

PubMed1999

Enamel erosion by some soft drinks and orange juices relative to their pH, buffering effect and contents of calcium phosphate.

The capability of a soft drink or a juice to erode dental enamel depends not only on the pH of the drink, but also on its buffering effect. As the latter is the ability of the drink to resist a change of pH it may add to the effects of the actual pH. The aim of the present study was to compare the pH and the buffering effect of various soft drinks with their erosive effects and the solubility of apatite. In 18 soft drinks, mineral waters and juices available on the Danish market, pH and the concentrations of calcium, phosphate and fluoride were determined. The buffering effect was determined by titration with NaOH. Human teeth (n = 54) covered with nail varnish except for 3x4-mm windows were exposed to 1.5 liters of the drink for either 7 days or 24 h under constant agitation. The depth of the erosions was assessed in longitudinal sections. The depth was found to vary greatly from 3 mm eroded by the most acidic drinks and fresh orange juice to only slightly affected surfaces by most of the mineral waters. The dissolution of enamel increased logarithmically inversely with the pH of the drink and parallel with the solubility of enamel apatite. Orange juice, pH 4.0, supplemented with 40 mmol/l calcium and 30 mmol/l phosphate did not erode the enamel as the calcium and phosphate saturated the drink with respect to apatite. Generally, the lower the pH the more NaOH was necessary to bring the pH to neutrality. In particular the buffering effect of the juice was high. For all drinks, no effect of their low fluoride concentrations was observed.

Apatites↗

PubMed1984

Dependence of rate of physical erosion on orientation and density in mineralised tissues.

Bone, dentine and enamel samples were treated with a gas-propelled jet of an abrasive, NaHCO3, which is physically much softer than any of these tissues in their fully mineralised condition. It was nevertheless found that they are all eroded by this treatment, which can therefore be used as a new kind of qualitative test of physical properties relating to wear resistance. General correlations were found between both degree of mineralisation and between structure orientation and erosion rate, surface-parallel-feature zones being worn more rapidly. Bone domains with surface-parallel collagen were eroded faster than those with perpendicular lamellae even if they were more densely mineralised. Rates of dentine wear depended on both density and tubule orientation, with peritubular zones and better mineralised incremental layers being more resistant. Enamel tufts wear more rapidly than the surrounding well mineralised regions. Enamel diazones wear less than parazones (areas with surface parallel prisms). At the prism scale, enamel is removed more rapidly near prism boundary discontinuities and in tubular enamel, at tubule walls. As regards the common orientation dependent effects seen in these three tissues, a cohesive explanation would be that structure discontinuities can be better exploited in a wear process if they allow cleavage from the surface; which tendency will increase with parallelism to the surface.

Animals↗

PubMedDate not supplied

Influence of toothbrushing on enamel softening and abrasive wear of eroded bovine enamel: an in situ study.

This study assessed the surface softening and abrasive wear of eroded bovine enamel with or without the influence of toothbrushing. Five volunteers took part in this in situ study of 5 days. They wore acrylic palatal appliances containing 6 bovine enamel blocks divided in two rows with 3 blocks, which corresponded to the studied groups: erosion without toothbrushing (GI) and erosion with toothbrushing (GII). The blocks were subjected to erosion by immersion of the appliances in a cola drink for 10 minutes, 4 times a day. After that, no treatment was performed in one row (GI), whereas the other row was brushed (GII). The appliance was then replaced into the mouth. Enamel alterations were determined using profilometry and microhardness tests. Data were tested using paired Students t test (p < 0.05). The mean wear values (microm) and percentage of superficial microhardness change (%SMHC) were respectively: GI--2.77 +/- 1.21/91.61 +/- 3.68 and GII--3.80 +/- 0.91/58.77 +/- 11.47. There was a significant difference in wear (p = 0.001) and %SMHC (p = 0.001) between the groups. It was concluded that the wear was more pronounced when associated to toothbrushing abrasion. However, toothbrushing promoted less %SMHC due to the removal of the altered superficial enamel layer.

Adult↗

PubMed2000

Structured review of enamel erosion literature (1980-1998): a critical appraisal of experimental, clinical and review publications.

OBJECTIVE: To attain an objective account of the methods to measure enamel erosion used in 1980-1998 publications, a structured review of the literature was undertaken. METHODS: Inclusion and exclusion criteria were applied to 731 clinical/experimental research and review reports. Eighty-five included papers were subsequently rated according to 'hierarchy of evidence' guidelines to assess the strength of the report's design and the relevance of the evidence to replicating enamel erosion in vivo in humans. Scores were assigned to rate each aspect in the guidelines. RESULTS: A total of 16 clinical, 13 review and 56 experimental papers were assessed; 36.4% were published during 1996-1998. Excluding reviews, 16 papers were qualitative and 56 quantitative; 51 used human enamel. Our classification yielded nine groups of methods (five scoring systems and 26 measurement techniques). CTFPHE (Can Med Assoc J 1992; 147: 443) grading of research reports indicated that 2.8% provided evidence grade I; 20.8%, grade IIa; 63.9%, grade III; and 12.5%, grade IV. CONCLUSIONS: There has been a consistent increase in the body of knowledge. The overall quality of publications has not substantially changed over time. Experimental studies were more often quantitative, and quantitative studies had better research designs. No single group of research methods had obviously superior research designs.

Analysis of Variance↗

PubMed2005

Supra-oesophageal manifestations of gastro-oesophageal reflux disease.

The extra-oesophageal signs that are most commonly related to gastro-oesophageal reflux include chest pain, asthma, chronic cough, posterior laryngitis and dental erosions. It is characteristic to find in such patients a poor presence of symptoms and endoscopic and pH-metric findings that are common in typical reflux. The therapeutic response to antisecretory drugs has become the most cost-effective tool for the diagnosis and treatment of this condition. Both the evidence available and expert agreement in consensus conferences support the use of proton pump inhibitors with doubled standard doses for at least 12 weeks in most cases. While an acceptable response is achieved with this significant acid inhibition, there are still questions to be answered in these and other aspects, such as the true prevalence, path physiology and diagnosis of this condition. It is therefore necessary and increasingly useful to create multidisciplinary teams with the aim to improve and promote understanding and the care of patients suffering from these supra-oesophageal symptoms caused by gastro-oesophageal reflux.

Anti-Ulcer Agents↗

PubMedDate not supplied

A randomized, controlled trial evaluating the three-year clinical effectiveness of two etch & rinse adhesives in cervical lesions.

A three-year randomized, controlled prospective study evaluated the clinical performance of two three-step etch & rinse adhesives (OptiBond FL, Kerr: O-FL; PermaQuick, Ultradent: PMQ) in Class V cervical erosion-abrasion lesions. The latter adhesive was also tested with two restorative composites with contrasting stiffness in order to evaluate the effect composite stiffness might have on the clinical longevity of cervical restorations. A total of 150 lesions were randomly restored in pairs of the three adhesive/composite combinations (PMQ combined with Amelogen Hybrid: PMQ/A-Hy, Ultradent; PMQ combined with Amelogen Microfill: PMQ/A-Mi, Ultradent; O-FL combined with Prodigy: O-FLJPro, Kerr) per patient and evaluated at baseline, after six months, one year, two years and three years of clinical service. After three years, the retention rate was 100% for O-FL/Pro and 98% for both PMQ/A-Hy and PMQ/A-Mi, thereby, satisfying the "full acceptance" guidelines specified by the American Dental Association. A pairwise comparison showed no significant difference in adhesive performance between restorations made using the microfilled and hybrid composite for any evaluation criteria (p>0.05).

Chi-Square Distribution↗

PubMed1997

Perimylolysis of the permanent dentition in an adolescent.

During a routine dental appointment at a dental school clinic, a fifteen-year-old black male patient was diagnosed with severe erosion of the dentition together with several carious lesions and a crowded dentition. During treatment of the carious lesions, severe erosion (perimylolysis) of the maxillary and mandibular teeth were observed, which at first alerted the attending clinician to a preliminary diagnosis of anorexia and/or bulimia. Because of the age, gender and social and medical history of the patient, these preliminary diagnoses were discounted, with a hypothesis of gastrointestinal disorder presented to the patient and his parents after consultation with oral medicine and oral pathology faculty. Saliva pH analysis, along with further research concluded that gastrointestinal reflux disease (GERD), surreptitious rumination, or a combination of both were possible diagnoses. Referral to a gastroenterologist for further examination was recommended, while a night-guard was fabricated for the patient to wear at night with fluoride gel. Root canal therapy together with prosthodontic care are often treatment options for patients suffering from gastrointestinal problems. This paper demonstrates how important routine dental examinations are, especially since dentists can often recognize systemic disorders whose symptoms first appear in the oral cavity.

Adolescent↗