SEARCH · PubMed Health

Results for “Tooth Wear”

Explore indexed PubMed citations for clinical trials, systematic reviews and public health research. Read source abstracts and follow each citation to its original PubMed record.

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

At least 271 records · Page 15Linked to original sources

PubMed2001

Correlation between buccolingual inclination and wear of mandibular teeth in ancient and modern Japanese.

This study compared the correlation between the buccolingual inclination and the wear score of the mandibular teeth in Jomon (one of the ancestors of modern Japanese who lived from 5000 to 300 BC) and modern Japanese. Data were obtained from 40 modern male Japanese and 39 male Jomon skulls housed in the University Museum of the University of Tokyo and National Science Museum, Tokyo. For each specimen, three computed tomograms of coronal sections of the mandibular body were available. The second premolar, first molar and second molar of Jomon stood more vertically than those of modern Japanese. There were significant correlations between tooth wear and the buccolingual inclination of mandibular molars. When ancient and modern populations were compared, tooth wear was significantly greater and buccolingual tooth inclination was more vertical in the ancient people, who probably applied stronger masticatory forces than modern people. The results suggest that the mandibular molar orientation is more buccal and there is greater tooth wear in the first and second molars of people with strong masticatory function.

Bicuspid↗

PubMed2006

Severe wear and tooth loss in wild ring-tailed lemurs (Lemur catta): a function of feeding ecology, dental structure, and individual life history.

The ring-tailed lemurs at Beza Mahafaly Special Reserve, Madagascar, exhibit a high frequency of severe wear and antemortem tooth loss. As part of a long-term study, we collected dental data on 83 living adult ring-tailed lemurs during 2003 and 2004. Among these individuals, 192 teeth were scored as absent. The most frequently missing tooth position is M1 (24%). As M1 is the first tooth to erupt, its high frequency of absence (primarily a result of wear) is not remarkable. However, the remaining pattern of tooth loss does not correlate with the sequence of eruption. We suggest that this pattern is a function of 1) feeding ecology, as hard, tough tamarind fruit is a key fallback food of ring-tailed lemurs living in gallery forests; 2) food processing, as tamarind fruit is primarily processed in the P3-M1 region of the mouth; and 3) tooth structure, as ring-tailed lemurs possess thin dental enamel. The incongruity between thin enamel and use of a hard, tough fallback food suggests that ring-tailed lemurs living in riverine gallery forests may rely on resources not used in the past. When comparing dental health in the same individuals (n=50) between 2003 and 2004, we found that individual tooth loss can show a rapid increase over the span of one year, increasing by as much as 20%. Despite this rapid loss, individuals are able to survive, sometimes benefiting from unintentional assistance from conspecifics, from which partially processed tamarind fruit is obtained. Although less frequent in this population, these longitudinal data also illustrate that ring-tailed lemurs lose teeth due to damage and disease, similar to other nonhuman primates. The relationship between tooth loss, feeding ecology, dental structure, and individual life history in this population has implications for interpreting behavior based on tooth loss in the hominid fossil record.

Age Factors↗

PubMed1991

Relationships between age and dental attrition in Australian aboriginals.

Tooth wear scores (ratios of exposed dentin to total crown area) were calculated from dental casts of Australian Aboriginal subjects of known age from three populations. Linear regression equations relating attrition scores to age were derived. The slope of the regression line reflects the rate of tooth wear, and the intercept is related to the timing of first exposure of dentin. Differences in morphology between anterior and posterior teeth are reflected in a linear relationship between attrition scores and age for anterior teeth but a logarithmic relationship for posterior teeth. Correlations between age and attrition range from less than 0.40 for third molars (where differences in the eruption and occlusion of the teeth resulted in different patterns of wear) to greater than 0.80 for the premolars and first molars. Because of the generally high correlations between age and attrition, it is possible to estimate age from the extent of tooth wear with confidence limits of the order of +/- 10 years.

Adolescent↗

PubMed2005

Oral health of southern Chinese children and adolescents with severe hypodontia.

OBJECTIVE: The aim of this study was to assess the oral health condition of southern Chinese children and adolescents with severe hypodontia. METHODS: This was a cross-sectional clinical study in the dental teaching hospital in Hong Kong. Twenty-five children and adolescents with severe hypodontia, and a comparison group of 25 age- and gender-matched controls took part. Verified clinical examination techniques were used to assess the pattern of missing teeth, tooth spacing, dental caries, periodontal condition, enamel defects, and tooth wear. Statistical comparisons were made between groups using independent Student t-tests and chi-square tests. RESULTS: The mean number of congenitally missing permanent teeth in the severe hypodontia group was 9.1 (SD = 5.0), with the maxillary lateral incisor being the most common missing tooth (14.5%). There were significant space discrepancies in both jaws between groups (P < 0.001). Caries prevalence was low with no difference between groups. There was no difference in periodontal condition between groups, with about half of the participants having no gingival inflammation. The severe hypodontia group had more enamel defects (P = 0.043), enamel hypoplasia (P = 0.044) and tooth wear (P = 0.005) than the comparison group. Three of the severe hypodontia group had ectodermal dysplasia. CONCLUSIONS: The oral health condition of southern Chinese children and adolescents with severe hypodontia was good in terms of caries experience and periodontal health. However, the increased prevalence of developmental defects of enamel and tooth wear complicates already complex interim and definitive prosthodontic management, and may increase psychosocial impact.

Adolescent↗

PubMedDate not supplied

Signs and symptoms associated with TMD in adults with shortened dental arches.

PURPOSE: This study investigated the prevalence of signs and symptoms associated with temporomandibular disorders (TMD) in adults with shortened dental arches in Tanzania. MATERIALS AND METHODS: The shortened dental arch group comprised 725 subjects with an intact anterior region and zero to eight occluding pairs of teeth posteriorly. They were categorized into five groups according to length and symmetry of the dental arches. A control group of 125 subjects with complete dental arches was included. The subjects were interviewed with questions related to pain and sounds within the temporomandibular joints and restricted mobility of the mandible. Clinical examination consisted of registration of clicking or crepitation of the joints, measuring maximum mouth opening, and assessing occlusal tooth wear. RESULTS: Joint sounds were reported significantly more frequently by subjects with posterior support only unilaterally (17%) and by subjects with no posterior support (10%) compared to other categories of dental arches (3% to 5%). No significant differences were found between categories of dental arches with respect to pain (2% to 9%), restricted mobility of the mandible (0% to 1%), maximum mouth opening < 40 mm (0% to 3%), or clicking or crepitation of the joints (12% to 23%). For the younger age group (> or = 20 and < 40 years), tooth wear occurred significantly more often in subjects with no posterior support. For the older age group (> or = 40 years), tooth wear increased significantly with decrease of posterior support. CONCLUSION: No evidence was found that shortened dental arches provoke signs and symptoms associated with TMD. However, when all posterior support is unilaterally or bilaterally absent, the risk for pain and joint sounds seems to increase.

Adult↗

PubMed1999

Dental cervical lesions associated with occlusal erosion and attrition.

Acid demineralization of teeth causes occlusal erosion and attrition, and shallow and wedge-shaped cervical lesions putatively involving abfraction. From 250 patients with tooth wear, 122 with cervical lesions were identified. From epoxy resin replicas of their dentitions, associations of occlusal attrition or erosion or no wear with cervical lesions were recorded at 24 tooth sites (total 2928 sites). Criteria used to discriminate occlusal attrition from erosion, and shallow from grooved, wedge-shaped or restored cervical lesions were delineated by scanning electron microscopy. A 96 per cent association was found between occlusal and cervical pathology. Shallow cervical lesions were more commonly found in association with occlusal erosion. Wedge-shaped lesions were found equally commonly in association with occlusal erosion, as with attrition. Grooved and restored cervical lesions were uncommon. Differences were appreciated in the associations within incisor, canine, premolar and molar tooth sites which related more to the site-specificity of dental erosion than to attrition from occlusal forces. Non-carious lesions on teeth then have multifactorial aetiology and pathogenesis in which erosion and salivary protection play central roles. Dentists should primarily consider erosion in the diagnosis, prevention and treatment of tooth wear.

Adolescent↗

PubMedDate not supplied

Childhood asthma and dental erosion.

The aim of this investigation was first to assess the prevalence of asthma in a random sample of fourteen-year-old children in Birmingham UK. Secondly to assess the levels of dental erosion in these children, and thirdly to see whether there was any correlation between children with asthma and the levels of dental erosion. A random sample of 418 children from twelve secondary schools was examined, 209 were male and 209 female. The level of tooth wear was recorded using a modification of the Tooth Wear Index of Smith and Knight. The prevalence of asthma in this group was 15.8 percent (66 children out of 418); the levels of dental erosion in children with asthma were higher.

Adolescent↗

PubMed2002

Is there a relationship between asthma and dental erosion? A case control study.

OBJECTIVES: The aims of this study were firstly to assess and compare the prevalence of dental erosion and dietary intake between three groups of children; children with asthma, those with significant tooth erosion but with no history of asthma, and children with no history of asthma or other medical problems. Secondly, to discover whether there was a relationship between medical history and dietary practises of these children and the levels of dental erosion. Thirdly, to measure and compare their salivary flow rates, pH and buffering capacity. METHODS: The study consisted of 3 groups of children aged 11-18 years attending Birmingham Dental Hospital: 20 children with asthma requiring long-term medication, 20 children referred with dental erosion, and 20 children in the age and sex matched control group. Tooth wear was recorded using a modification of the tooth wear index (TWI) of Smith and Knight. Data on the medical and dietary history were obtained from a self-reported questionnaire supplemented by a structured interview. The salivary samples were collected under standard methods for measurements. RESULTS: Fifty percent of the children in the control group had low erosion and 50% moderate erosion. However, high levels were recorded in 35% of children in the asthma group and 65% in the erosion group. There appeared to be no overall differences in diet between the groups. There was an association between dental erosion and the consumption of soft drinks, carbonated beverages and fresh fruits in all the three groups. More variables related to erosion were found in the erosion and asthma groups. A comparison between the three groups showed no significant differences in unstimulated and stimulated salivary flow rates, or pH and buffering capacity. CONCLUSION: There were significant differences in the prevalence of erosion between the three groups, children with asthma having a higher prevalence than the control group. Although there was a relationship between the levels of erosion and some medical history and acidic dietary components, these did not explain the higher levels in asthmatic children. Further investigation is required into the factors affecting the increased prevalence of erosion in children with asthma.

Adolescent↗

PubMed1989

The orodental status of anorexics and bulimics.

This study aims to assess the dental status of anorexics and bulimics by comparison to age-matched controls. One hundred and eight individuals participated, of which 58 had an eating disorder. This group were further subdivided into bulimics who induced vomiting (33), bulimics who did not vomit (7), and anorexics (18). The caries experience (DMFS), plaque levels, gingival inflammation and buffering capacity of saliva were assessed and total vomiting episodes estimated from the product of vomiting frequency and duration. Statistical analysis (one way ANOVA) revealed no significant differences with most of the dental variables between the eating disorder groups and the controls. A linear association (Pearson correlation coefficient) between vomiting frequency, duration or total vomiting episodes and tooth wear was not found, although the frequency of pathological tooth wear is significantly high in the vomiting bulimic group, especially if the total number of vomiting episodes is greater than 1100.

Adolescent↗

PubMed1984

Oral findings in osteogenesis imperfecta.

The dentitions of twenty-eight patients, each of whom had either an autosomal dominant or a sporadic osteogenesis imperfecta (OI) syndrome, were evaluated. The diagnosis of dentinogenesis imperfecta (DI) could be established in all seven patients with dominantly inherited OI in three families, while all eight persons with dominant OI in three other families had normal teeth. Of the thirteen remaining patients with OI, twelve had no family history of the disorder; four had DI and eight had normal teeth. One person had a family history of OI and DI. All patients with abnormal tooth wear and spontaneous tooth fractures had DI. The DMF ratio increased with age in all patients with OI type I and was higher among the patients with OI type III and DI. Class III malocclusions were found in 66% of the patients. A statistically significant high incidence of impacted first and second molars was noted.

Adolescent↗

PubMed1994

A scanning electron-microscopic study of in vitro abrasion of mammalian tooth enamel under compressive loads.

Microscopic tooth-wear (microwear) patterns can be an important tool for assessing modes and rates of abrasive tooth wear, but their analysis and interpretation is complicated by the fact that microwear is influenced by many factors. Three of these factors were here tested under conditions of compressive loading: (1) species differences in enamel structure, (2) abrasive particle size and (3) magnitude of force. Teeth of four species (Homo sapiens, Lemur fulvus, Ovis aries and Crocodylus rhombifer) were abraded in vitro using three sizes of abrasive silicon-carbide grit (average diameters 73, 23 and 14 microns), at two loads (50 and 100 kg). Microwear features were assessed by scanning electron microscopy of lightly etched enamel surfaces and epoxy replicas. Microwear pits (length:width < 4:1) were the predominant feature type. Factorial analysis of variance of rank-transformed, feature-area measurements demonstrated that, under conditions of compressive loading, the size of abrasive particles was the primary determinant of microwear size. These results contrast with previous experimental tests of abrasion by predominantly shearing loads, where feature size was influenced by interaction among experimental factors, including the microscopic orientation of enamel crystallites. Although magnitude of compressive force was not a factor in microwear size variation, it may be a critical factor in explaining the presence or absence of microwear on tooth surfaces. The relatively small compressive bite force generated during typical chewing may not consistently produce abrasive pitting. These experiments demonstrate that, as the same abrasive regime can produce both large and small pits, the mechanism by which wear features are formed (i.e. compression or adhesion) cannot be determined from the size of features alone. Nevertheless, the dependence of pit size on abrasive particle size demonstrates that metrical variation in wear features can elucidate important attributes of an animal's diet.

Alligators and Crocodiles↗

PubMed1997

Wear in the upper and lower incisors in relation to incisal and condylar guidance.

The incisors of 85 patients were examined for tooth wear with the aim to evaluate possible association between the degree of wear and anterior guidance. Apart from clinical functional analysis electronic axiography using the system CADIAX was carried out. Anterior guidance in protrusive movement was marked on individually mounted plaster casts and scanned using a pantograph. The cephalometric analysis program CADIAS was used for the metric determination of the anterior guidance angle to the axis-orbital plane, and in order to relate the anterior guidance to the horizontal condylar inclination. The interincisal angle was included in the evaluation as a further functional angle and according to overjet and overbite there were classified typical incisor relations. Where both anterior guidance and incisor inclination and relation were in the normal range, there was an increase in incisal tooth wear in the group investigated. With reduced functional space, frequently found together with anterior deep bite, incisor wear was less extensive. While the occurrence of parafunction was shown not to be related to anterior guidance and incisor inclination and relation parafunctions were the decisive factor in the occurrence of severe incisor wear. Where anterior guidance and incisor inclination and relation are normal, the area of enamel under load is smaller and the space for bruxism larger. Parafunctional forces thus appear to result in a higher degree of wear than is found with the reduced functional space of a steep incisor position. Anterior guidance could not be evaluated as a parafunctonal inducing factor, but only as determining the wear pattern in the individual.

Adult↗

PubMed1993

A survey of patients seen in consultant clinics in conservative dentistry at Edinburgh Dental Hospital in 1990.

A baseline study of referrals by letter to a department of conservative dentistry staffed purely by honorary consultants was conducted for one year. Distinct differences were found between the majority of patients referred from general practice and those referred from other sources. Principal reasons for referral were problems of tooth replacement, appearance, endodontics and tooth wear. A predominance of female patients was seen in all groups except those complaining of tooth wear. 'Endodontic' patients featured the highest proportion of requests for hospital treatment. Complex restorative treatment was provided for the majority (70%) of referred patients, and about 10% received treatment from dental students. The rates of referral showed evidence of dependence on travelling distance to the referral centre but not on the availability of local GDPs. This emphasises the importance of maintaining existing specialist dental referral services in major population centres and the development of new services where appropriate.

Adult↗

PubMed2003

[Restoration of occlusal structure by direct tooth coating materials].

For the restoration of occlusal anatomy partial gold restorations are preferred. Adhesive techniques in combination with plastic materials can also be used and are less invasive than indirect restorations. Occlusal tooth wear is becoming a major problem all over the world. This paper describes minimal invasive techniques to restore tooth wear.

Composite Resins↗

PubMed2005

The worn dentition--pathognomonic patterns of abrasion and erosion.

Historically, the dental literature has revealed various causes of tooth wear, yet it has failed to provide a conclusive method of differentiation and diagnosis of the condition. The categories of tooth wear encountered most commonly in dental practice are abrasion and erosion. The major causes of wear from abrasion are bruxism and toothpaste abuse, and the major causes of wear from erosion are regurgitation, coke-swishing and fruit-mulling. Through in-depth clinical study of these causes, this paper provides a diagnostic system that will enable dental professionals to determine and differentiate the exact aetiology of the worn dentition simply by the recognition of the pathognomonic wear patterns on diagnostic casts, which are based upon the position and quantity of the non-carious loss of tooth structure.

Bruxism↗

PubMed2001

Effects of stone chewing by outdoor sows on their teeth and stomachs.

Stone chewing is a common behaviour in outdoor sows, but its effects on their teeth and stomachs have not been investigated. Tooth wear and damage was assessed by examining the heads of 58 sows culled from outdoor units and 23 culled from indoor units. Tooth damage was found in 28 per cent of outdoor and 30 per cent of the indoor sows, and tooth wear affected 88 per cent of the outdoor and 91 per cent of the indoor sows. The outdoor sows were more prone to wear on the lower molars and premolars, a pattern of wear associated with stone chewing. The stomachs of 152 outdoor sows and 47 indoor sows were examined. Stones were found in 59 of the outdoor sows but in none of those kept indoors. There was no evidence that the presence of stones damaged the stomach, or that stone chewing affected the health of the sows. The teeth of the outdoor sows were worn, but probably not sufficiently to affect their ability to eat during their relatively short productive lives.

Animals↗

PubMed1977

Bruxism and its effect on the teeth.

This study presents the progress of tooth wear and the change in structural morphology on individual teeth of bruxist subjects, compared with non-bruxers. From the results of this investigation it can be concluded that the tooth wear progressed faster in bruxers than in non-bruxers. Scanning electron microscope investigations revealed in 10 teeth the same pattern of deep grooves and striations on the wear-facets of active bruxers.

Adult↗

PubMed1999

Oral status of 81 subjects with eating disorders.

The aim was to explore possible correlations between the oral status of patients undergoing treatment at a special outpatient psychiatric clinic for eating disorders and such variables as psychiatric diagnosis and duration of illness, oral hygiene habits, salivary function, and dietary habits. Healthy volunteers of a similar age were recruited for comparison. The material comprised 100 consecutive referrals, of whom 79 were women and 2 were men (age range 17 to 47, median 25 yr) participated. The eating disorders were diagnosed according to the American Psychiatric Association's DSM III-R criteria. The clinical and radiographic examinations were supplemented by standardized intraoral photographs, study models and salivary analysis. The decayed, missing, filled surfaces (DMFS) index was 15.3+/-10.9, a significantly higher caries frequency than for the reference group. More than half the subjects had erosive tooth wear involving the dentine, and about one-third had very low unstimulated salivary flow rates and very high counts of mutans streptococci and lactobacilli. Erosive tooth wear was significantly correlated to the number of years of binge-eating. Compared to age-matched individuals, subjects with diagnosed eating disorders are more susceptible to both dental caries and erosion. They should be encouraged to adopt appropriately tailored preventive programmes and to have regular dental check-ups.

Adolescent↗