摘要:

Herlofson BB, Barkvoll P. Sodium lauryl sulfate and recurrent aphthous ulcers. A preliminary study. Acta Odontol Scand 1994;52:257-259. Oslo. ISSN 00016357.Sodium lauryl sulfate (SLS), a synthetic detergent commonly used in dentifrices, is an effective denaturant. The aim of the present study was to investigate the effect of SLS in patients with recurrent aphthous ulcers (RAU). Ten patients with multiple minor RAU participated in the study. The mean incidence of MU was 17.8 during a 3-month period before the study. The patients used a dentifrice containing 1.2% SLS for a test period of 3 months followed by a dentifrice without SLS for the same time period. The results showed a statistically significant decrease in the number of aphthous ulcers from 14.3 after using the SLS-containing dentifrice to 5.1 ulcers after brushing with the SLS-free dentifrice (p<0.05). It is suggested that the denaturing effect of SLS on the oral mucin layer, with exposure of the underlying epithelium, induces an increased incidence of RAU.

ISSN:0001-6357    

DOI:10.3109/00016359409029036

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor

摘要:

Carlson BR. Discrimination ability in patients with extensive fixed partial dentures on mandibular canine teeth. Acta Odontol Scand 1994;52:260–265. Oslo. ISSN ooO1-63S7.To study discrimination ability under different test situations, a psychophysiologic test was performed in a group of patients with 12-unit mandibular fixed partial dentures supported on the 2 canines. The cantilever segments were exchangeable. Analyses of discrimination ability were performed with regard to periodontal and endodontic status of the abutment teeth and to type of mucosal contact in cantilever regions. Discrimination ability was markedly reduced with a strongly reduced periodontal bone contact area. The endodontic status did not affect discrimination ability. A tendency towards better discrimination ability was seen when the cantilever sections without mucosal contacts were compared with those with mucosal contacts through pontics or saddles.

ISSN:0001-6357    

DOI:10.3109/00016359409029037

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor

摘要:

Granath Kinnby C, Widenheim J. Evaluation of information on dental health care at child health centers. Factors in canes prevention-opinions of dental personnel and their relation to parental attitudes. Acta Odontol Scand 1994;52:266–270. Oslo. ISSN 0001-6357.Our aim was to study, by means of questionnaires, some specific opinions of dental personnel, giving information on dental health care at child health centers and Public Dental Service clinics. The questions dealt with the relative importance of dietary habits, oral hygiene, and fluoride for the occurrence of caries in small children and why some children develop caries. The material consisted of dentists, dental hygienists, and dental assistants, participating in 1983 and/or 1992. The results showed that, on the whole, the different categories had similar opinions. In both 1983 and 1992 diet was ranked first, oral hygiene second, and fluoride third, but the distribution of priorities changed. In 1992 the priority values for oral hygiene were more dispersed over the priority grades and those for fluoride considerably higher than in 1983. In contrast, parents of 4-pear-old children interviewed in 1983 stated that toothbrushing is more important for dental health than diet. To the question why some children develop canes, most of the personnel responded that parents lack motivation to convert advice into practice. Besides unsatisfactory dietary habits and insufficient oral hygiene, deficiencies in the information process were other frequently quoted factors.

ISSN:0001-6357    

DOI:10.3109/00016359409029038

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor

摘要:

Nordstrom G, Eriksson S. Longitudinal changes in craniomandibular dysfunction in an elderly population in northern Sweden. Acta Odontol Scand 1994;52:271–279. Oslo. ISSN 0001-6357.Longitudinal changes and cohort differences in craniomandibular dysfunction (CMD) were studied in a 79-year-old cohort (n= 65) and in 70-year-old cohorts in 1981 (n= 62) and 1990 (n= 60) by means of interview and clinical examination. Although the frequency of reported CMD symptoms decreased, many clinical signs of CMD increased during the 9-year observation period. Women reported more symptoms and showed more signs of CMD than men, and a great many of the clinical signs registered in 1981 still persisted in 1990. The 70-year-old cohort studied in 1990 showed a lower frequency of reported symptoms of CMD and of temporomandibular joint pain on palpation and a higher frequency of muscle pain and mandibular deviation than the 70-year-olds examined in 1981.

ISSN:0001-6357    

DOI:10.3109/00016359409029039

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor

摘要:

Wang NJ. Variation in clinical time spent by dentist and dental hygienist in child dental care. Acta Odontol Scand 1994;52:280-289. Oslo. ISSN 0001-6357.In a field project in the Public Dental Service in Norway, 4000 children aged 5 to 18 years were examined and given preventive care by dental hygienists. The study describes the clinical time spent providing child dental care when hygienists examined all children and referred to dentists those children who required care hygienists were not qualified to deliver. Of all clinical time spent, 56% was dentist time and 44% was hygienist time. A high proportion of children without dental canes did not consume dentist resources at all. More than 40% of the dentist time was consumed by the 10% of the children with most new decayed teeth. In conclusion, the project showed that in a child population with low caries increment, a substantial proportion of children received all dental care from hygienists, so that dentist resources were saved for other groups. However, although hygienists were used as first-line personnel, a considerable quantity of dentist time was spent on dental care for children.

ISSN:0001-6357    

DOI:10.3109/00016359409029040

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor

摘要:

Karlsson S, Molin M, Myrvold T. Flexural strength of two electro-plated dental ceramics. Acta Odontol Scand 1994;52:290–293. Oslo. ISSN 0001-6357.This study aimed to investigate the influence on flexural strength of electro-plating two dental porcelains, Vita Omega and Vita Omega 800. The porcelains were treated in accordance with the manufacturer's instructions, and the specimens were produced following the ISO 6872 standard for rectangular bars. Specimens were divided into three groups, of which none, one, or three of the surfaces were plated with a thin layer of gold. Flexural strength was tested with a three-point bending test. Ten specimens were tested for each combination of porcelain and plating, for a total of 60 test pieces. For both porcelains, a significantly higher flexural strength was found for the specimens furnished with a gold layer. The number of covered surfaces did not significantly influence the tested strength. This increase in strength is most likely due to decreased crack initiation and fracture propagation after the covering of random defects in the porcelain. A better stress distribution might also be anticipated and partly explain the results.

ISSN:0001-6357    

DOI:10.3109/00016359409029041

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor

摘要:

Bevenius J, Linder L, Hultenby K. Site-related streptococcal attachment to buccocervical tooth surfaces. A correlative micromorphologx and microbiologic study. Acta Odontol Scand 1994;52:294-302. Oslo. ISSN 0001-6357.Scanning electron (SEM) microscopy of epoxy replicas made from dental impressions has shown that in buccal gingival recession the root surfaces are devoid of cementum, leaving the dentin exposed. In this study replication techniques were applied to correlate the micro-morphology of the buccocervical region with early streptococcal attachment. The subjects were 27 healthy young adults. The buccocervical surfaces of all the premolars were meticulously cleaned. The subjects fasted for 2 h before impression-taking. Replicas were made from impressions in hydrophilic A-silicone, and streptococcal attachment was visualized by light microscopy of mitis-salivarius agar replicas incubated anaerobically for 48 h. The surface micromorphology was documented by SEM of corresponding epoxy replicas. Colonization only 2 h after cleaning was very sparse. Sites with healthy or inflamed gingivae had markedly different colonization patterns in the sulcular region. In 4 subjects with a total of 12 sites where gingival recession, undetected clinically, was disclosed by SEM, representative colonies were retrieved and identified microbiologically to species level. Two healthy sites per subject were also sampled.Streptococcus mutansandS. sobrinuswere identified from eight sites with exposed root dentin.S. oralispredominated on the enamel surfaces. The method offers a valuable complement to in situ and in vitro microbiologic studies of exposed dentin and a novel technique for sampling clinical isolates of streptococci.

ISSN:0001-6357    

DOI:10.3109/00016359409029042

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor

摘要:

MidtbøM, Hake A. Root length, crown height, and root morphology in Turner syndrome. Acta Odontol Scand 1994;52:303–314. Oslo. ISSN 0001-6357.Root length, crown height, and root morphology were studied on intraoral and panoramic radiographs in 33 Turner syndrome patients aged 7.0–16.7 years, subdivided on the basis of karyotype. Thirty-three normal girls aged 10.2–16.4 years served as controls. In the 45X patients and, with the exception of a few teeth, also in the isochromosome and mosaic karyotypes, root length and crown height of incisors, canines, and premolars were significantly reduced. Some teeth showed altered crown-root proportions. Maxillary first premolars showed a significantly increased number of two-rooted and three-rooted variants. Mandibular premolars and molars had a complex root morphology, and a classification system was established including four premolar and six molar root types. Premolars had a significantly increased number of root components. Some of the variants, such as a molar-like second premolar, are apparently specific for these patients. On several first molars a radix entomolaris was identified. Two separate mesial and one or two separate distal roots were also frequently seen. Our investigation demonstrates that X-chromosome deficiency influences root formation.

ISSN:0001-6357    

DOI:10.3109/00016359409029043

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor

摘要:

Kildal KK, Ruyter IE. How different curing methods affect the degree of conversion of resin-based inlay/onlay materials. Acta Odontol Scand 1994;52:315-322. Oslo. ISSN 0001-6357.The purpose of this investigation was to measure the conversion of five inlay materials with different curing methods. In particular, the influence of secondary curing in light ovens—that is, additional curing with light and heat simultaneously—was evaluated. The conversion was determined by infrared multiple internal reflection spectroscopy. The inlays were cured with three curing methods (A, B, and C). The conversion was recorded immediately after ended curing and after an additional storage period (postcuring). The mean conversion with method A, using a handheld curing unit, was 42.1% and increased significantly to a mean of 55.4% during the storage period at (37±1)°C. Both curing methods B and C, including the use of light ovens, gave a mean conversion of 65%, which did not increase significantly during the storage period. This investigation demonstrated that the degree of conversion depends on the curing method used.

ISSN:0001-6357    

DOI:10.3109/00016359409029044

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor