摘要:

FlóSystrand, F., AmbjóSrnsen, E., Valderhaug, J.&Norheim, P.W. Oral status and acceptance of dental services among some elderly persons in Oslo.Acta Odontol. Scand. 1982, 40, 1–8Oral conditions were studied clinically and radiographically in a group of people aged 67 -94 years. the group comprised 70 persons living in an institution for elderly people and 111 persons living in their homes in the surrounding area. the participants were classified according to sex, age and former occupation. the examination was carried out in a dental office established at the institution. 63% of the participants were dentulous with a mean number of 13 teeth. Almost 50% of the teeth were previously restored and 13% of the teeth were decayed at the examination. 45% had complete maxillary dentures and 39% had complete mandibular dentures. the need for dental treatment according to defined criteria was registered, and treatment-offers were given. Comparisons were made between the treatment suggested and the treatment actually given. of the total group, 129 persons needed dental treatment. of these, 65 persons accepted all or part of the treatment suggested. In general, sex was not a good predictor of the need for an acceptance of dental services. However, age was found to be useful as a predictor. Social background was an unreliable predictor of the need for and acceptance of dental services.

ISSN:0001-6357    

DOI:10.3109/00016358209019803

出版商:Taylor&Francis    

年代:1982

数据来源: Taylor

摘要:

Leitao, J. Surface roughness and porosity of dental amalgam.Acta Odontol. Scand. 1982. 40, 9–16The surface roughness of seven different products of dental amalgam was determined and the contribution of their porosity content and alloy particle size to that surface property was assessed. A significant correlation between roughness and porosity was found. In all amalgams the small voids were the most frequent. It was also found that the amalgam products which exhibited the highest frequency of big voids presented significantly higher surface roughness values. No significant correlation was found between roughness and alloy particle size.

ISSN:0001-6357    

DOI:10.3109/00016358209019804

出版商:Taylor&Francis    

年代:1982

数据来源: Taylor

摘要:

Dahl, B.L.&Krogstad, O. the effect of a partial bite raising splint on the occlusal face height. An x-ray cephalomelric study in human adults.Acta Odontol. Scand. 1982, 40, 17–2420 patients (18–50 years) with pathological attrition of upper and/or lower anterior teeth were treated, as a temporary measure, by means of a partial chrome-cobalt splint covering the palatal surfaces of the six upper front teeth. Tantalum implants to provide reference points were placed in the basal portion of upper and lower jaw bones. Lateral cephalometric radiographs were takenwithandwithoutthe splint at the beginning of treatment and thereafter every two months till the difference between measurements was as small as possible. Changes in the occlusal face height were evaluated. Measurement reliability proved to be very high. Continuous use of the splint caused intrusion of the front teeth and eruption of the others in all patients. the intrusion was on an average 1.05 mm and the eruption 1.47 mm after 6–14 months, indicating a possible potential for tooth eruption in human adults. More eruption than intrusion appeared to take place in the youngest age groups. Sexual differences could not be established. Use of the splint did not cause the common symptoms of mandibular dysfunction. Lisping was the most serious complaint.

ISSN:0001-6357    

DOI:10.3109/00016358209019805

出版商:Taylor&Francis    

年代:1982

数据来源: Taylor

摘要:

Messelt, E. B. Ultrastructural studies on the bleb formation in seal and rat submandibular gland striated ducts.Acta Odontol. Stand. 1982. 40, 25–33For the present study Seal (Phoca vitulina) and rat submandibular gland striated ducts were investigated by electron microscopy. Both normal and stimulated animals (starved for 24 h and then fed 2 h before the tissues were removed) were examined. Basal inyaginations of the cell membrane with areas heavily loaded with mitochondria were typical features of both animals. Secretory granules were especially numerous in the apical part of stimulated duct cells. the granules were separated from the luminal membrane of the cells by a condensed area called the spearating zone. Apical protrusions or blebs, which were frequently occurring in striated ducts of both animals, are interpreted as manifestations of apocrine secretion. It was concluded that this way of apocrine secretion is a fundamental function, since seals, which have salivary glands of a rather simple composition with acini which are functionally reduced, have retained the ability to form blebs.

ISSN:0001-6357    

DOI:10.3109/00016358209019806

出版商:Taylor&Francis    

年代:1982

数据来源: Taylor

摘要:

Tveit, A.B.&Halse. A, the effect of a NaF solution and a fluoride varnish on the acid resistance of root dentin.Acta Odontol. Scand. 1982, 40, 35–43Sectioned root dentin surfaces were treated with either a NaF solution for 10 min or a fluoride varnish for 48 h and then exposed to 1 M acetate buffer pH 5.8 for 20 h. Microradiographs of non-fluoride treated specimens (controls) regularly showed a partially demineral-ized zone extending from the surface. the NaF-treated specimens exhibited a lesion with alternating radiopaque and radiolucent zones, which had a mean total depth equal to that of the controls. the varnish-treated specimens showed a demineralized zone which was significantly less deep than those observed in the two other groups. Elemental analyses performed by an electron microprobe showed a positive correlation between the amount of F incorporated and the acid resistance of the tissue.

ISSN:0001-6357    

DOI:10.3109/00016358209019807

出版商:Taylor&Francis    

年代:1982

数据来源: Taylor

摘要:

NordbóS, H.&Skogedal, O. the rate of cervical abrasion of premolars in dental students.Acta Odontol. Scand. 1982, 40, 45–47Abrasion of the cervical region of teeth has been attributed to mechanical cleaning procedures using dentisfrices containing abrasives of various kinds. In the present study the loss of substance during a 26 month period in the cervical region of the upper left premolars of dental students was measured directly by means of a micrometer. the average rate of abrasion was found to be 0.2μper day. No difference was observed between the group using a≌non-abrasive≌dentifrice and that employing a conventional paste. the risk associated with pulp exposure under the conditions observed is briefly discussed.

ISSN:0001-6357    

DOI:10.3109/00016358209019808

出版商:Taylor&Francis    

年代:1982

数据来源: Taylor

摘要:

óSrstayik, J.,óSrstavik, D.&Kommisar, J. Preferential affinity of oral bacteria for homologous salivary films on dental materials.Acta Odon-tol. Scand. 1982, 40, 49–56Freshly isolated strains ofStreptococcus mutansfrom saliva of two test subjects were tested for adhesion to various dental gold alloys and one brand of luting cement. the materials were covered with pellicle derived from one or the other of the two subjects. In←crossover→experiments it was consistently found thatS. mutansadhered in greater numbers to pellicles of homologous origin. This preference for the homologous pellicle appeared to vary among the materials tested as substrates; also, the total number of organisms adhering varied among the materials. Moreover, different isolates varied in their affinity for the materials and showed a varying degree of dependence on homologous pellicle for adherence.In vitroplaque formation of mixed oral flora on pellicle-coated dental casting gold alloy were also more abundant on homologous pellicles as compared with heterologous ones. the results support the view that biologically specific mechanisms contribute to the adhesion of bacteria to dental restorative materials, and to the build-up of a bacterial plaque on these materials.

ISSN:0001-6357    

DOI:10.3109/00016358209019809

出版商:Taylor&Francis    

年代:1982

数据来源: Taylor

摘要:

óSrstavik, J.&óSrstavik, D. Influence ofin vitropropagation on the adhesive qualities ofStreptococcus mutansisolated from saliva.Acta Odontol. Scand. 1982, 40, 57–63Streptococcus mutansfrom saliva of one test person were isolated on mitis/salivarius agar containing bacitracin and extra sucrose, and sub-culturedin vitroon trypticase soy broth with numerous transfers. Freshly isolated organisms and bacteria from selected subcultures were studied in adhesion tests using glass or dental zinc phosphate cement as substrate. Different bacterial isolates were used in separate experiments. Three different techniques were used; two based on radioactivity assays of adhering3H-thymidine-labelled bacteria, and one based on visual counting. With all three techniques freshly isolatedS. mutansadhered in significant numbers. It was consistently found that their, ability to adhere decreased with the number ofin vitrotransfers. the results support the view that growth condition is an important factor governing the adhesive properties of oral bacteria.

ISSN:0001-6357    

DOI:10.3109/00016358209019810

出版商:Taylor&Francis    

年代:1982

数据来源: Taylor