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At least 199 records · Page 11Linked to original sources
PubMed1991

Clinical evaluation of a dentinal adhesive system: three-year results.

The dentinal adhesive Scotchbond 2 was evaluated with the microfilled composite resin Silux in cervical and root caries lesions for up to 3 years. Clinical criteria evaluated included retention, marginal integrity, marginal discoloration, color match, anatomic form, recurrent caries, gingival response, and postoperative sensitivity. Overall, the adhesive demonstrated improved performance over earlier dentinal adhesive systems. Retention was greatest at 3 years when available enamel margins had been etched (93%) and when root caries lesions (97%) had been restored. Other criteria were reported as generally favorable. Early findings suggest that the level of development of sclerotic dentin may influence behavior of the adhesive. The greatest difficulty was noted in lesions presenting with heavy sclerotic dentin.

Acid Etching, Dental↗
PubMed1991

Scanning electron microscopic analysis of dental wear on the heavily worn second molars of the wild Japanese monkey (Macaca fuscata).

Microscopic features on scanning electron micrographs of epoxy-replicas of the second molars of nine wild-caught adult female Japanese monkeys, Macaca fuscata, from Oita Takasakiyama, Kyushu, were measured using a digitizer. These monkeys had been fed a monkey-diet during three or four days of captivity before replicas were made. Six of these specimens showed such heavily worn second molars that narrow peripheral enamel bands surrounded large dentin exposures and the cusps of the others had been worn off. Microwear measurements from sites near facet 9 were compared with those of facet 9 of three kinds of hard-object feeding primates from the literature. The mean percentage of pits among all features (pits and scratches) in these samples was almost equal to those that have been reported previously for Pongo pygmaeus and Cebus apella, but tended to be smaller than those of Cercocebus albigena. The mean pit width of these specimens was larger than that of Pongo pygmaeus and was almost equal to those of Cercocebus albigena and Cebus apella. The mean scratch width of these samples was larger than those of Cebus apella and Pongo pygmaeus. These features and the significant differences between these samples and the nonhard-object eaters such as Colobus guereza place these Macaca samples in the category of hard-object feeders. Additional directly observed seasonal feeding behaviors that would confirm the dietary contribution to these features is now needed.

Animals↗
PubMed1990

Tooth wear and some factors influencing its severity.

Tooth wear has been studied in a dentally attending population, aged 46-85 years. The level of tooth wear was recorded for 100 persons using the tooth wear index of Smith and Knight. Aetiology was assessed using a history/questionnaire/examination. Erosion/attrition were postulated in 98 persons while abrasion was present in 82. All demonstrated some tooth wear and in 6.93% of 7,822 surfaces this was defined as pathological according to the threshold levels associated with the index. 84 persons had pathological wear on some surfaces but this was predominately cervical, only 12 persons showing pathological wear on the occlusal/incisal surfaces. Occlusal contact area was measured using imprints in soft opaque wax, transmitted light and a charge-coupled linear scanning array. The array is moved at 90 degrees to its axis by a linear translator to produce an image consisting of 1,600 lines, each of 2,048 pixels. This image is converted to hard copy using a DEC DDP 11/23 computer which will also give area measurements. Occlusal contact area ranged from 3.16 to 194.40 sq mm with a mean of 59.23 sq mm. Tooth wear is a significant clinical problem in this population. Wear on the occlusal/incisal surfaces is more common in older age groups and in males but could not be related to occlusal contact area or denture status by the methods used.

Aged↗
PubMed1990

Glass-ionomer cements--clinical usage and experience: 2.

Glass-ionomer cements have unique and varied properties: they are tough, translucent, biologically inert, resistant to degradation in the mouth, adhesive to tooth structure and they inhibit caries. In a number of ways they are probably the one substance available today that most approaches the ideal restorative material. In Part 1 of this two-part article the authors reviewed the physical and clinical properties of glass-ionomer cements, here they go on to describe their use in practical and sometimes novel restorative procedures.

Child↗
PubMed1989

[Scanning electron microscopy study of wedge-shaped defects in extracted teeth and in in-vivo conditions].

The surface of wedge shaped defects of 51 extracted teeth was examined with the scanning electron microscope. To study morphology of surfaces of 12 defects in vivo a replication technique was carried out. It was shown that there is a relation between the morphological features and the clinical symptoms. In the progression of the defects there are active and passive phases, what will be reflected on the one side in the clinical symptoms and on the other side in the morphological features.

Adult↗
PubMedDate not supplied

Eating disorders: anorexia and bulimia nervosas.

From both ethical and legal standpoints, knowledge of the symptoms of eating disorders is imperative, since early diagnosis and treatment are directly related to successful therapy. This article provides the dentists with information to aid in the recognition, diagnosis, treatment, referral, and dental support of patients with eating disorders.

Anorexia Nervosa↗