摘要:

Pirttiniemi P, Kantomaa T, Ronning 0. Relation of the glenoid fossa to craniofacial morphology, studied on dry human skulls. Acta Odontol Scand 1990;48:359-364. Oslo. ISSN 0001-6357.The purpose of this work was to compare glenoid fossa dimensions and craniofacial morphology on the basis of standard lateral roentgenograms. To overcome the difficulties encountered in making exact measurements on living subjects, 59 dry skulls were used. Eight angular measurements were taken to describe the form of the skull base, mandible, and articulating surface of the glenoid fossa, four linear measurements to describe the position of the fossa, and one to describe the size of the whole skull. A close relationship was observed between the morphology of the articulating surface of the glenoid fossa and the mandibular morphology. The skull base angulation was associated with the position of glenoid fossa in two ways. Basically, the position of the fossa is related to skull base characteristics, but the location of the articular eminence in relation to the clival plane suggests that the mandibular condyle may cause a remodeling of the eminence anteriorly when the glenoid fossa otherwise is translocated posteriorly in association with the flat skull base.

ISSN:0001-6357    

DOI:10.3109/00016359009029066

出版商:Taylor&Francis    

年代:1990

数据来源: Taylor

摘要:

Neverlien PO. Assessment of a single-item dental anxiety question. Acta Odontol Scand 1990;48:365-369. Oslo. ISSN 0001-6357This paper discusses issues related to the validity and usefulness of a single-item measure of dental anxiety: The Dental Anxiety Question (DAQ) 'Are you afraid of going to the dentist?'. A nationwide random sample of 1351 people aged 15–79 years answered the DAQ and Corah's Dental Anxiety Scale (CDAS). In addition, the respondents were categorized with regard to gender, age, geographic areas, and residential districts. The internal consistency reliability coefficient for CDAS was high (α= 0.91), and DAQ correlated highly with all of the four items on the CDAS (mean,r= 0.71). The correlations between the DAQ and the CDAS were high for men, women, and between age groups (r= 0.74–0.86). Women had significantly higher mean values on the DAQ than men in all age groups, and for both genders the mean DAQ values decreased with increasing age. The DAQ mean values were insignificantly different across geographic areas and residential districts. The conclusion is drawn that the DAQ shows promising qualities as a reliable and valid measure of the overall dental anxiety in the Norwegian adult population.

ISSN:0001-6357    

DOI:10.3109/00016359009029067

出版商:Taylor&Francis    

年代:1990

数据来源: Taylor

摘要:

Berge M, Gustavsen F. Dental practitioners' evaluation of the metal-resin and metal-ceramic technique in the treatment with fixed prosthetic restorations. Acta Odontol Scand 1990;48:371-377. Oslo. ISSN 0001-6357.To collect information on the use of the metal-resin and the metal-ceramic technique, a questionnaire survey among general practitioners was carried out in Bergen, Norway. Of the 20 dentists (16% sample) randomly selected among the private general practitioners, 17 (85%) responded. The results indicated that 45% metal-resin and 55% metal-ceramic constructions were inserted. Metal-ceramic crowns were selected for their favorable esthetics, whereas metal-resin appliances were preferred because of their repair possibilities and good marginal adaptation. Most dentists (70%) claimed that metal-resin restorations have a better marginal adaptation than metal-ceramic constructions. Location in the mouth, the general periodontal condition, and evidence of wear in the remaining dentition also appeared to influence the selection of the type of tooth-colored veneered crown.

ISSN:0001-6357    

DOI:10.3109/00016359009029068

出版商:Taylor&Francis    

年代:1990

数据来源: Taylor

摘要:

Jokstad A, Mjor IA. Clinical variables affecting the marginal degradation of arnalgam restorations. Acta Odontol Scand 1990;48:37%387. Oslo. ISSN 0001-6357The influence of different clinical variables on the marginal degradation of amalgam restorations was studied in a clinical trial of class-II amalgam restorations. Seven Scandinavian dentists using 5 different alloys placed 468 restorations in 210 patients. The marginal degradation was scored on impressions of the restored teeth by using a six-point ordinal rating scale and was transformed to ridit values. After 5 years 126 patients with 296 restorations remained in the trial. Ridit analysis and paired comparison tests utilizing the Bonferroni correction factor at each yearly interval indicated that the extent of degradation of the restoration margins was influenced by the location in the mouth, the position on the tooth, the type of alloy, and the operator. The results demonstrate that features of the cavity preparation and the handling of the material by the operator are more important for the degradation of the restoration margins than other clinical variables.

ISSN:0001-6357    

DOI:10.3109/00016359009029069

出版商:Taylor&Francis    

年代:1990

数据来源: Taylor

摘要:

Jokstad A, Mjor IA. Cavity design and marginal degradation of the occlusal part of class-I1 amalgam restorations. Acta Odontol Scand 1990:48:389-397. Oslo. ISSN 0001-6357.The effect of variations in the design of class-II cavity preparations on the marginal degradation of amalgam restorations was included as a study aim in a clinical trial. Four hundred and sixty-eight restorations were placed in 210 patients by 7 Scandinavian dentists using 5 different alloys. The marginal degradation was scored on impressions of the restored teeth by means of a six-point ordinal rating scale. The scores were then compared with defined characteristics of the occlusal parts of the initial cavity preparations. Characteristics of the cavity that could be related to the marginal degradation were diverging occlusal cavity walls. occlusal cavity depth, fissures perpendicular to the cavosurface angle, and rough or variable occlusal cavosurface angles. Cavity preparation features not influencing the rate of degradation were the occlusal width, the location of the cavosurface angle on the cusp slope, occlusal cavosurface angles with sectors smaller than 90 degrees, and less than 1 mm enamel remaining between the cavity preparation and another restoration. The association between the different cavity design features and the marginal degradation varied with the different alloys. Superior marginal performance is probably the result of optimal condensation or surface treatment, rather than features of the cavity preparation.

ISSN:0001-6357    

DOI:10.3109/00016359009029070

出版商:Taylor&Francis    

年代:1990

数据来源: Taylor

摘要:

Saxén L, Tenovuo J, Vilja P. Salivary defense mechanisms in juvenile periodontitis. Acta Odontol Scand 1990;48:399-407. Oslo. ISSN 00014357The local, saliva-associated defense mechanisms of 28 juvenile periodontitis (JP) patients and their age and sex-matched controls were studied. Lysozyme, lactoferrin, salivary peroxidase, myeloperoxidase, and thiocyanate concentrations were determined from both whole saliva and parotid saliva. The total concentrations of salivary IgA, IgG, and IgM were assayed. The periodontal condition and the salivary flow rates were registered. Among the JP patients, a significantly elevated concentration of IgG was found in parotid saliva but not in whole saliva. Salivary peroxidase activities were significantly low both in the whole and in the parotid saliva samples of the JP patients, and leukocyte-derived myeloperoxidase was present in significantly low amounts in whole saliva of these patients. Because both glandular (salivary peroxidase) and polymorphonuclear-cell-derived (myeloperoxidase) enzyme activities were low among the JP patients, suppressed peroxidase-mediated host defense mechanisms could be characteristic of JP.

ISSN:0001-6357    

DOI:10.3109/00016359009029071

出版商:Taylor&Francis    

年代:1990

数据来源: Taylor

摘要:

Eide R, Tveit AB. Finishing and polishing glass-ionomer cements. Acta Odontol Scand 1990;48:409-413. Oslo. ISSN 00014357.Four different methods for finishing and polishing the surfaces of two different glass-ionomer cements were studied by measuring the roughness of specimens at different stages of the procedures. Method 1 consisted of the four 3M Sof-Lex XT discs. Method 2 included a round, fine-grit diamond and the Vivadent polisher. In method 3 a round Arkansas stone and the Vivadent polisher were used. Method 4 comprised medium and fine sand and fine cuttle paper discs. Petroleum jelly was always used, to prevent heating and desiccation of the specimens. The cements used were KetacFil and KetacSilver. The smoothest surface was found after removal of the strip. The Sof-Lex medium disc gave the least rough surface for KetacFil, whereas the fine cuttle disc gave the smoothest finish for KetacSilver. Discs in sequence are to be preferred to diamonds and stones.

ISSN:0001-6357    

DOI:10.3109/00016359009029072

出版商:Taylor&Francis    

年代:1990

数据来源: Taylor

摘要:

Albandar JM, Olsen I, Gjermo P. Associations between six DNA probe-detected periodontal bacteria and alveolar bone loss and other clinical signs of periodontitis. Acta Odontol Sand 1990;48:415-423. Oslo. ISSN 0001-6357.The purpose of the present study was to assess the associations between the presence and amounts ofActinobacillus actinomycetemcomitans, Bacteroides gingivalis, B. intermedius, Eikenella corrodens, Wolinella recta, and Fusobacterium nucleatum in the periodontal pocket and the degree of alveolar bone loss and other clinical signs of periodontitis, such as probing pocket depth, attachment level, and presence of bleeding on probing at the same site. The study material comprised 16 subjects with or without approximal sites showing longitudinal alveolar bone loss who were selected from a group of 142 subjects monitored radiographically over the past 4 years. In this group 105 sites were examined, of which 58 showed recent alveolar bone loss⩾1 mm. Subgingival plaque was collected with absorbent paper points and hybridized with32P-Iabeled DNA probes specific for the above-mentioned bacteria. The amount of each bacterial species was correlated with the degree of bone loss over time and the three clinical measurements by means of Spearman rank correlation.A. actinomycetemcomitansshowed poor correlations with all three clinical signs of periodontal inflammation, whereasB. gingivalisandW. rectademonstrated significant positive correlations with the three clinical measurements and with attachment level and pocket depth, respectively. In addition, the amount ofA. actinomycetemcomitans, B. gingivalis and W. rectashowed significant positive correlation with the extent of alveolar bone loss at the site. In contrast, the amounts ofB. intermedius, E. corrodens, andF. nucleatumshowed negative correlations with all four measurements.B. gingivalis and W. rectademonstrated stronger associations when their amounts in the pocket were combined and when proportions relative to the amount ofB. intermedius, E. corrodens, andF. nucleatumat the site were assessed. Thus, the results support the concept that specific combinations and relations of organisms rather than single organisms may play an important role in the pathogenesis of periodontitis.

ISSN:0001-6357    

DOI:10.3109/00016359009029073

出版商:Taylor&Francis    

年代:1990

数据来源: Taylor