摘要:

Abstract –In 79 of 124 children with bilaterally located widened follicles around non‐erupted canines one of the maxillary canines was chosen by lot for surgical exposure of the tooth crown. In seven cases both maxillary canines were exposed. The remaining 38 children were radiographically controlled at certain time intervals as were the 86 cases where surgery was perfomed. The follicles removed from 52 cases were tooth. The histologic examination showed that the histologic appearance of the extirpated follicle did not correspond to the radiolographically verified width of the pericoronal space. The specimens were composed of a losely arranged fibrous connective tissue with an epithelial lining occurring in 77% of the cases. The epithelial lining consisted of reduced enamel epithelium and showed in none of the cases squamous metaplasia or keratinization. Nor was there any clinical or histologic sign of a neoplastic or cystic change of the folli

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1982.tb01517.x

出版商:Blackwell Publishing Ltd    

年代:1982

数据来源: WILEY

摘要:

Abstract –Experiments in a standardized rabbit model indicate that the yello‐golden stain formed on tooth surfaces during the use of SnF2may consist of stannic sulfide. The nature of the stain, the presence of sulfur in the samples and the effect of an oxidizing agent on the stain support this view. It is suggested that the low pH of SnF2caused denaturation of pellicle protein with exposure of sulfhydryl groups, which later form stannic sulfides through reactions with the stannous ions present in the preparati

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1982.tb01518.x

出版商:Blackwell Publishing Ltd    

年代:1982

数据来源: WILEY

摘要:

Abstract –The distribution of204TI uptake in young rats after intraperitoneal injection was studies. Densitometry showed that the highest accumulationof isotope was recorded in dentin and epithelial structures whereas the CNS has a comparatively low labeling. The uptake of different organs correlated well to the clinical symptoms recorded at acute thallium poisonin

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1982.tb01519.x

出版商:Blackwell Publishing Ltd    

年代:1982

数据来源: WILEY

摘要:

Abstract –Four patients with herediatry hyperplasia of the gingiva were studies. Bipsy samples of gingival tissue contained subepithelial loose connective tissue with thick rounded fibroblasts or dense collagen‐rich connective tissue with thin fibroblasts, which appeared to be inactive These two types of fibroblasts differed in electron microscopy. alcian blue‐staining of intercellular material in various. MgCL2concentrations was similar in hyperplastic and control samples. Collagen from the hyperplatic gngiva appeared to be more mature than normal, based onthe presence of stable, nonreducible cross lines. an investigation of growth harmone secretion and treatment trial suggested that the growth retardation observed in earlier studies was due to normal variation in growth rates (in one patient) to hypopituitarism associated with birth in breeth present

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1982.tb01520.x

出版商:Blackwell Publishing Ltd    

年代:1982

数据来源: WILEY

摘要:

Abstract –Bacteria belonging to the species B. melaninogenicus ss. melaninogenicus (two stains), B. melaninogenicus ss. intermedius (five strains), B. asaccharolyticus (seven strains), and Actinobacillus actinomycctemcomitans (four strains) were tested under anaerobic conditions for their sensitivity to the bactericidal effect of pooled human serum. The A. actinomycetemcomitans strains were not killed to any extent by the serum. Both B. melaninogenicus ss. melaninogenicus strains were killed by serum. The sensitivity to serum among the strains of B. asccharolyticus and B. melaninogenicus ss. intermedius was diverse. There was no correlation between the sensitivity to serum among the strains and the levels of specific antibodies in the serum. The bactericidal activity of serum was only effective if the complement system was present in serum. All strains initiated activation of complement and binding of a C3 component to the cell surface both in normal and MgEGTA chelated serum. The possible role of serum bactericidal activity in the pathogencsis of oral infections is unclea

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1982.tb01521.x

出版商:Blackwell Publishing Ltd    

年代:1982

数据来源: WILEY

摘要:

Abstract –In a longitudinal study we compared clinical data on pain and tenderness and electromyographic recordings of postural and maximal activity from 37 patients before and after treatment of functional disorders of the masticatory system. Forty‐three dental students served as controls. Treatment was followed by a concomitant decrease of pain, tenderness and postural activity. Muscle strength in terms of the activity during maximal bite in the intercuspal position was not altered by treatment, but activiation of the night and left anterior temporal muscle became more uniform. The relative postural loading of the elevators was assessed as their activity in percent of full effort. Following treatment, loading in patients decreased significantly and became more symmetrical in the anterior temporal muscles. Loading also tended to decrease in the posterior temporal and masseter muscles. However, it still significally exceeded postural activity in percent of full effort in the controls. Since treatment involved correction of the occlusion we conclude that the intermaxillary conditions of tooth contact during function play a role in the etiology of functional disorders and that the reduction of the relative postural loading of the elevators of the patients due to this treatment contributed to thier relief. The relatively high percentage of full effort displayed as postural activity by the patients even after treatment may explain flucturation of symptoms and signs of functional disorders of the masticatory system. It also emphasizes the need for improved of treatment to reduce the probality of recurre

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1982.tb01522.x

出版商:Blackwell Publishing Ltd    

年代:1982

数据来源: WILEY

摘要:

Abstract –Mandibular autopsy specimens of 100 Danish subjects without known systemic diseases were obtained. Microradiograms of 100‐μ‐thick undermineralized vertical bucconlingual ground cross‐sections and these sections, stained with basic fuchsin, were used. Microradiographic and histologic readings of bone turnover foci on Haversian canal and endosteal‐trabecular surfaces were compared and combined. The analyses show the following. 1) number/area Haversian canals with bone formation and resorption foci and total of Haversian canals are reproducible and representative measures of bone turnover, while estimation of % bone turnover surfaces on periosteal adn endosteal‐trabecular surfaces in biopsies of mandibles has no diagnostic value. 2) Percentage of bone mass and mean cortical width in standard locality indicate the level in group of mandibles. 3) The cortical variables of bone turnover are sex independentl number/area Haversian canals with resorption foci is age independentl number/area Haversian canals with bone formation foci, totalof Haversian canals and percentage of subendosteal (Haversian canals+marrow spaces) are increa

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1982.tb01523.x

出版商:Blackwell Publishing Ltd    

年代:1982

数据来源: WILEY

摘要:

Abstract –The favourable spontaneous course of TMA indicates a conservative approach to treatment. One‐half of the present 119 patients were either not treated by physiatric measures only. One‐third of the patients were treated by pivotation, whereby TMJ pain was relieved within an average of 2 months. Pivotation seemed to prolong the spontaneous course of TMA. Steriods were injected intraarticularly in one‐fifth of the patients, whereby TMJ pain was relieved within an average of 5 d. There were, however, symptoms other than pain that tended to persist after steroid injection. The various treatments did not result in any lasting differences in mandibular mobility. Pivotation and steroid injection seemed to result in a higher frequency of irregularity of the mandibular condyle as seen in transpharyngeal radi

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1982.tb01524.x

出版商:Blackwell Publishing Ltd    

年代:1982

数据来源: WILEY

摘要:

Abstract –An intraoral radiographic survey was reduced to four films examining only the regions of the premolars and the maxillary canines. It was applicable to children aged 9–10 years without clinical orthodontic symptoms. Energy imparted was 0.9 mj. By orthopantomography energy imparted was 1.6 mj and the thyroid dose was 0.13

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1982.tb01525.x

出版商:Blackwell Publishing Ltd    

年代:1982

数据来源: WILEY

摘要:

Abstract –The fatigue properties of resinous materials may be interesting from several points of view. A good resistance to fatigue failure is desirable in a denture base material. The possible relationship between fatigue strength and wear constitutes another aspect of interest. The purpose of the present work was to investigate the fatigue strength of various types of resinous materials used in dentistry. It was found that heat‐cured denture base materials do not necessarily have higher fatigue strength than cold‐cured materials. At low levels of stress a tendency was demonstrated for microfilled resins to show higher fatigue strength than other types of resinous materials. On this basis a connection between wear and fatigue properties may be sur

ISSN:0909-8836    

DOI:10.1111/j.1600-0722.1982.tb01526.x

出版商:Blackwell Publishing Ltd    

年代:1982

数据来源: WILEY