Restoring the age-worn dentition with 21st century technology.
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Bruxism↗
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Results for “TOOTH ABRASION”
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Biomechanically-induced dental disease.
Malocclusion, as an etiological agent in dental disease, is among the most controversial subjects in dentistry. Bruxism has been blamed on stress and many other nondental factors. A biomechanical mechanism that serves as a contributing factor to stimulate tooth clenching and grinding is defined and used to identify the 12 common dental symptoms caused by tooth clenching and grinding. A method is proposed through which the practitioner can link the observable dental signs with the biomechanical factors for accurate diagnosis and appropriate treatment, preferably at an early stage before the damage becomes severe.
Adult↗
Etiology and diagnosis of tooth wear: a literature review and presentation of selected cases.
PURPOSE: This article presents an overview of etiologies associated with tooth wear. MATERIALS AND METHODS: Specific types of wear based on clinical findings and patient history are described. RESULTS: The occurrence and pattern of tooth wear are related to cultural, dietary, occupational, and geographic factors. Examples of tooth wear related to these factors with regional specificity are presented. CONCLUSION: The dental practitioner should recognize the characteristic signs of tooth wear, as they may be the first to discuss the problem with the patient. Management should be based on accurate diagnosis.
Adolescent↗
Two-year clinical performance of a polyacid-modified resin composite and a resin-modified glass-ionomer restorative material.
This study compared the clinical performance of a polyacid-modified resin composite and a resin-modified glass-ionomer restorative material over two years. Thirty-four pairs of restorations of Compoglass and Fuji II LC were placed in caries-free cervical erosion/abfraction lesions without tooth preparation. Restorations were clinically evaluated at baseline, 6, 12, 18 and 24 months using modified Ryge/USPHS criteria. A significantly higher incidence of failed restorations was found with the polyacid-modified resin composite (p < 0.05).
Adult↗
E-Z gold for repair of abraded and eroded cusp tips.
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Dental Cavity Preparation↗
Cervical dentin hypersensitivity. Part II: Associations with abfractive lesions.
OBJECTIVE: The purpose of this retrospective study was to evaluate the association between cervical dentin hypersensitivity and the presence of abfractive lesions. METHOD AND MATERIALS: Written records and study casts for 250 active-care patients, selected alphabetically, were analyzed for the clinical detection of abfractive lesions and cervical dentin hypersensitivity from 1979 until 1996. Clinical diagnosis of abfractive lesions was made according to existing literature descriptions of these hard tissue lesions. Cervical dentin hypersensitivity was diagnosed when a verified positive threshold patient response was found during tooth evaluation by the air indexing method. Patient groups I and II were formed solely on the basis of the presence or absence, respectively, of a verified positive threshold patient response of cervical dentin to air. RESULTS: A significant association was found between air-indexed cervical hypersensitivity and the presence of abfractive lesions. The primary locations for both cervical hypersensitivity and abfractive lesions were the buccal surfaces of posterior teeth. CONCLUSION: This long-term retrospective study found a positive association between cervical dentin hypersensitivity and abfractive lesions. The correlative nature of this study suggests the need for further investigation.
Adolescent↗
A literature review of the techniques to measure tooth wear and erosion.
This paper reviews methods to measure tooth wear especially those more recently introduced as a result of improvements in technology. The review searched methods to measure tooth wear and dental erosion from large epidemiological investigations, in vitro and in vivo studies. There seems to be wide variation in techniques used to measure tooth wear and erosion. In vitro techniques may have little direct clinical relevance but can lead to new and more accurate clinical methods. In vivo studies have problems with reference points and accurate validation of the techniques. There is a need for a simple, reliable technique to quantify tooth wear due to erosion.
Diagnostic Imaging↗
The correlation between occlusal characteristics and temporomandibular dysfunction in Saudi Arabian children.
The aim of the present study was to investigate the association between the different occlusal characteristics and signs and symptoms of temporomandibular dysfunction (TMD) in children with primary dentition in the western region of Saudi Arabia. A total of group of 502 children 4-6 years old residing in the city of Jeddah, Saudi Arabia provided the data for analysis. The result of this study showed significant correlation between signs and symptoms of TMD and some of the occlusal characteristics including posterior crossbite (P < 0.05), edge to edge (P < 0.013), anterior openbite (P < .036) and class III canine relationship and as well as asymmetrical canine relationship (P < .048 and P < .046 respectively). On the other hand, no correlation was reported between signs and symptoms of TMD and the remaining occlusal characteristics. The lack of significant correlation between TMD and some of the occlusal variants could be attributed to sampling and methodology differences. However, the present study supported the previous conclusion that temporomandibular dysfunction is multifactorial and highlights the importance of early intervention to prevent further consequences to the TMD and permanent occlusion.
Chi-Square Distribution↗
Utilization of a small-particle composite resin for anterior and posterior restorations.
The ability to acid etch enamel has resulted in the proliferation of adhesive dental techniques that enable conservation of sound tooth structure during the preparation and restorative phases. Recent research has focused on the clinical procedures that use composite resins as well as the material formulations involved in adhesive treatment. This article discusses the physical and optical properties of a composite resin with a smaller filler particle and demonstrates its utilization in anterior and posterior applications as a means of providing functional aesthetic dental care.
Acid Etching, Dental↗
Occlusal disease revisited: Part I--Function and parafunction.
This article will address the evolution of occlusal disease from childhood and the deciduous dentition forward. It will include the evolution of anterior wear with emphasis on "cross over" of the mandible. Having classified the types and extent of occlusal disease, new evidence will be shown, on the adult dentition with pathognomonic manifestations, of cross-over or bruxed-braced occlusal disease. Its potential effect on restorative dentistry and dental implants will be discussed.
Adult↗
Presentation, diagnosis and initial management of patients referred to a hospital tooth wear clinic.
Information on presenting complaints, diagnosis and initial management strategy was recorded on a proforma for 114 consecutive patients referred to a hospital tooth wear clinic over a two-year period. Over twice as many male patients were referred as females. Twenty percent of patients had no presenting complaint and the others shared the common complaints concerning appearance, sensitivity and their deteriorating dentitions. The assessment of aetiology identified attrition as the most common cause of tooth wear in the subject group studied. About half the group were prescribed preventative treatment only and the other half were deemed to require restorative dental treatment.
Adolescent↗
[Investigation on the positions and relevant factors of wedge-shaped defects in the elderly].
OBJECTIVE: To investigate the position and relevant factors of wedge-shaped defects in elderly. METHODS: 462 elderly were examined. RESULTS: The occurrence rate of wedge-shaped defects was 99.1%, all had at least labial or buccal defects, with premolars the most frequent. However, 15.2% of them had lingual defects, most frequently in molars. No significant association were found between wedge-shaped defect position and tooth brushing or erosion factors in the group. In tooth with defect, the occlusal surface wear was more severe, the denture abutment teeth were more in number, and the functional mobility was increased; in teeth with lingual defect, these phenomena were more obvious. CONCLUSION: The wedgeshaped defects, besides tooth brushing and erosion factors, occlusal force and its accumulation plays a role as well, lingual lesions are more related to traumatic occlusal force.
Aged↗
[Studies on the causative factors of cervical wedge-shaped defect of human teeth from three dimensions].
OBJECTIVE: To investigate causative factors of cervical wedge-shaped defect of human teeth and the significance of methods for measurement of the defect. METHODS: Experimental cervical defects on 9 pairs of premolars were created by cross-brushing, erosion, or fatigue of occlusion force separately or combinedly and measured in depth and area of profile as well as in volume. RESULTS: 1. Profile depth of defects caused by three factors separately showed no statistical difference, but the profile depth caused by combining factors was much more than that caused by each individual factor; 2. The hardness of enamel and dentin in defect area was lower than that in normal area of tooth samples; 3. Measurement from one-dimension (depth) and two-dimension (area) showed only low relation in profile depth, however, measured three-dimensionally (volume) there existed moderate relationship. CONCLUSION: For study of cervical defect, the profile depth is feasible provided that is a large sample group and without equipment for volume measuring; if the sample size is limited and there is sophiscated instrument for volume measuring, the 3-dimensional measurement is the most sensitive one.
Adolescent↗
Orthodontic-restorative treatment of chipped or worn incisors.
PURPOSE: To evaluate the shear bond strength of esthetic adhesive restorations for worn or fractured incisal edges. MATERIALS AND METHODS: On 30 human extracted incisors the edge was reduced and a bevel was prepared in the thickness of enamel. Then, the incisal edges were restored, using a different adhesive system in each of the three groups to which the sample teeth had been randomly assigned. Group A: Scotchbond Multi-Purpose Plus, in combination with phosphoric acid, and Z100 as a restorative material. Group B: Scotchbond 1 after etching with phosphoric acid, plus Z100. Group C: F2000, a compomer, in combination with its Primer/Adhesive. The differences in the bond strength values among the three groups were tested for statistical significance. Also, the resistance to load of the restored teeth was compared with that of 10 intact incisors (Group D) (controls). A statistical analysis was performed to test the significance of the differences. RESULTS: No statistically significant difference in shear bond strength was found between Scotchbond Multi-Purpose Plus (17.6 MPa) and Scotchbond 1 (14.8 MPa), whereas F2000 gave significantly lower bond strength values (10.1 MPa). As compared with intact incisors, the teeth restored with either Scotchbond Multi-Purpose Plus or Scotchbond 1 did not perform significantly differently under load. On the other hand, the incisors restored with F2000 gave, as compared with the controls, a resistance to loads significantly lower and of a questionable reliability from a clinical standpoint. SEM observations performed on some of the samples revealed that when phosphoric acid was used to condition the substrate, a deep and uniform demineralization of the enamel was effected, and a mechanically retentive interlocking was created at the interface between resin and enamel. The Adhesive/Primer of F2000 was unable to produce an equally retentive morphology.
Acid Etching, Dental↗
Restoration of cervical lesions: an update.
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Aged↗
Severity, distribution, and correlates of occlusal tooth wear in a sample of Mexican-American and European-American adults.
PURPOSE: The objective of this study was to determine the severity, distribution, and correlates of tooth wear in a sample of Mexican-American and European-American adults drawn from a community-based longitudinal aging study on oral health. MATERIALS AND METHODS: The maxillary teeth of 71 subjects enrolled in a longitudinal aging study were assessed using a previously introduced five-point (0 to 4) ordinal scoring system in which each tooth is given a score describing the severity of wear. The tooth wear scores were compared with data concerning demographic factors, functional/parafunctional habits, soft drink consumption, and bite force measurements to determine specific correlates of tooth wear. RESULTS: The mean wear score for all teeth was 1.50 on the five-point scale. There was a significant difference between the mean wear score of anterior teeth (1.85) and posterior teeth (1.17). Bivariate analyses detected a moderate degree of correlation between maxillary tooth wear and age and bite force. Maxillary tooth wear was significantly greater in males and in subjects with reported teeth clenching/grinding. Multivariate analyses revealed that age, gender, bite force, self-reported teeth clenching/grinding, and number of daily meals/snacks had significant correlations with maxillary tooth wear. CONCLUSION: The overall severity of maxillary tooth wear in this sample of Mexican-American and European-American adults was low, with anterior teeth having a greater degree of wear than posterior teeth. Age, gender, bite force, teeth clenching/grinding, and number of daily meals/snacks are potential factors that may have contributed to tooth wear in the study sample.
Adult↗
[Evaluation clinical long-term curative effect and analysis of its influence factors after restoration of teeth with wedge-shaped defects].
OBJECTIVE: To evaluate the long-term curative effect clinically and analysis of its influence factors after restoration of teeth with wedge-shaped defects. METHODS: Seventy five cases of 509 teeth with various degrees of dental wedge-shaped defects were randomly divided into two groups--the group restored by Dyract Cement and the group restored by 3M-Vitremer. Evaluation was made with the modified USPHS evaluation criterion after restoration for 1,2,4 years respectively. RESULTS: The successful rate dropped down from 2 year successful rate 85.5% to 4-year 27.7%. The new wedge-shaped defects were presented at the cervical margin of the original restoration in 1.8% (2 years later) and 6.6% (4 years later). There were a lot of influence factors on long-term curative effect. The failure rate in the group with occlusal interference was significantly higher than that without occlusal interference. CONCLUSIONS: The clinical successful rates are affected by the value of occlusal force on the restored teeth and the physical properties of the restorative materials. It is suggested that the process of restoration of dental wedge-shaped defect should include obviating occlusal factors as well as to improve the properties of restorative materials.
Adult↗