Swedish dental journal. Supplement最新文献

{"title":"Survival of onlay bone grafts. A study in the adult rat.","authors":"M Gordh","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":76572,"journal":{"name":"Swedish dental journal. Supplement","volume":"127 ","pages":"1-52"},"PeriodicalIF":0.0,"publicationDate":"1998-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20564616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Studies on fluoridated toothpicks.","authors":"H Kashani","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The aim of this thesis was to evaluate the wooden toothpick as a vehicle for the delivery of fluoride to the approximal area. After two minutes use in vivo, the release of fluoride from the pointed section of a toothpick impregnated in 4% NaF was estimated to 0.15 mg. Toothpicks produced similar or somewhat higher fluoride concentrations in the approximal area compared with other fluoride-containing products, like dentifrice, mouthrinse solution and tablet. The mean fluoride concentration in an approximal area treated for two minutes with a toothpick impregnated in 4% NaF was around 11 mM/l. Toothpicks impregnated in 4% NaF, 8% SnF2 or 2% chlorhexidine had an effect on the proportion of mutans streptococci and on the decline of pH in dental plaque, but it was small and only of short duration. The recolonization of mutans streptococci was, however, slower after using the SnF2- and chlorhexidine-impregnated toothpicks than after using the NaF- and non-impregnated toothpicks. The effect of fluoridated toothpicks on the degree of de- and remineralization of enamel and dentine was measured using transversal microradiography in an in situ study. Four weeks' use of toothpicks, especially of NaF-impregnated toothpicks, reduced the degree of demineralization of enamel and dentine at approximal sites. Secondary ion mass spectrometry was also used to determine the fluoride content in the outer surface of dentine, which increased more than 10 times after using fluoride toothpicks compared with non-impregnated toothpicks. In a second in situ study, 4% NaF-, 2% chlorhexidine- and non-impregnated toothpicks had a similar effect on sound and demineralized enamel and on demineralized dentine. However, the NaF toothpicks were superior in terms of their effect on sound dentine. The effect on mutans streptococci and plaque-pH, on the other hand, was the same for all three types of toothpicks. The main conclusion from this thesis is that the wooden toothpick is a suitable vehicle for the delivery of fluoride to the approximal area.</p>","PeriodicalId":76572,"journal":{"name":"Swedish dental journal. Supplement","volume":"126 ","pages":"1-48"},"PeriodicalIF":0.0,"publicationDate":"1998-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20564619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Risk for periodontal disease in a Swedish adult population. Cross-sectional and longitudinal studies over two decades.","authors":"O Norderyd","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":76572,"journal":{"name":"Swedish dental journal. Supplement","volume":"132 ","pages":"1-67"},"PeriodicalIF":0.0,"publicationDate":"1998-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40728511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Growth factors and bone regeneration. Implications of barrier membranes.","authors":"G Zellin","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Insufficient or absence of bone healing is a frequent problem within all surgical fields. This often necessitates treatment by autogenous bone grafting. Recently, two new techniques to promote bone healing were introduced, the osteopromotive membrane technique, and local delivery of growth-stimulatory factors, both with a high rate of success in preclinical experiments. The aims of the present series of investigations were to further develop the membrane barrier technique, both by itself as well as in combination with local delivery of growth factors, in animal experiments. During membrane-promoted bone formation, the membrane porosity was found to be of importance for the initial rate of bone formation as well as for the performance of the material in the tissue. In contrast, the final amount of bone was not affected. In a well-known bone healing model, the 5 mm in diameter 'critical size defect' at the rat mandibular ramus, the efficacy of rhBMP-2, rhTGF-beta 1 and rhFGF-2 to promote bone regeneration alone and in combination with barrier membranes was evaluated. Under both conditions, rhBMP-2 was found to be an efficient promoter of bone healing. rhFGF-2 had some stimulatory effect both with and without barrier membranes, whereas rhTGF-beta 1 was found to have a minor stimulatory effect by itself, but in combination with barrier membranes it was inhibitory. These observations were interpreted as being the result of an effect of the growth factors at different levels of the osteoblastic lineage; rhBMP-2 being an inducer of osteoblastic cells from stem cells, whereas rhTGF-beta 1 may primarily act on already committed cells. In contrast, rhFGF-2 may have stimulatory effect at different levels of the lineage. Based on the positive results obtained by the combination of rhBMP-2 and barrier membranes in the rat mandible, this combination was then applied to (i) rabbit radius defects; and (ii) a rat calvarial osteoneogenesis model. In the long bone model, membranes by themselves were insufficient to promote bone healing, but the combination resulted in complete regeneration. In the osteoneogenesis model, the combination of barrier membranes and rhBMP-2 resulted in a 100% increase in the final amount of achievable bone. In the last study, rhFGF-2 (no barrier membranes) was shown to enhance revitalization of autoclaved autogenous bone grafts, a procedure clinically used in craniofacial reconstruction mainly after tumor surgery. The combined use of rhBMP-2 and barrier membranes has great potential to be a useful treatment for improving bone healing and might be an alternative to bone grafting.</p>","PeriodicalId":76572,"journal":{"name":"Swedish dental journal. Supplement","volume":"129 ","pages":"7-65"},"PeriodicalIF":0.0,"publicationDate":"1998-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20589816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Teratological studies on craniofacial malformations.","authors":"C Jacobsson","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Craniofacial malformations cause great human suffering. The purpose of the experimental studies was to investigate teratogenically induced craniofacial malformations in the rat, and to study if vitamin B6 could prevent the teratogenically induced malformations in the rat. The aim of the clinical investigation was to compare mandibulofacial dysostosis (MFD) with hemifacial microsomia (HFM) and thalidomide-induced malformations restricted to the first and second branchial arches. In the experimental studies we used two different teratogenic agents, etretinate and BAPN (beta-aminoproprionitrile). Vitamin B6 was administered one day prior to and simultaneously with the teratogenic agent. The induced malformations were observed by direct microscopy, histology, differential staining, microdissection and enzyme histochemistry. Knowledge of isoenzymic differentiation was obtained by isoelectric focusing and polyacrylamide gel electrophoresis. The clinical features of 29 patients with MFD, 26 with HFM and seven with thalidomide-induced malformations were investigated. The patients underwent clinical investigations, radiography, tomography, computed tomography, surgical exploration and audiograms. The etretinate-induced syndrome in the rat shows similarities to first and second branchial arch syndromes in man. Defective formation of Meckel's cartilage and the cartilaginous skull base, the zygoma and the middle ear ossicles were prominent features of the observed malformations. The induced malformations were accompanied by increased staining for alkaline phosphatase (APase) in the skull and skull base cartilages and Meckel's cartilage. BAPN induced cleft palate in 95% of the cases and the teratogenically induced cleft palate was accompanied by a pathological differentiation pattern that could be traced by determination of isoenzymes in the palatal shelves as well as in amniotic fluid. Vitamin B6 could prevent the teratogenic malformations induced by etretinate and BAPN in the rat. Comparing MFD, HFM and thalidomide-induced malformations, all syndromes included patients with external, middle and inner ear malformations. Cranial nerve palsy/paresis was only seen in HFM and thalidomide-induced malformations. A relationship between disturbed neural crest cell migration and defects of the first and second branchial arches seems possible.</p>","PeriodicalId":76572,"journal":{"name":"Swedish dental journal. Supplement","volume":"121 ","pages":"3-84"},"PeriodicalIF":0.0,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20146076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pulp survival and hard tissue formation subsequent to dental trauma. A clinical and histological study of uncomplicated crown fractures and luxation injuries.","authors":"A Robertson","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Traumatic injuries in children and adolescents are a common problem, and the prevalence of such injuries has increased over the last 10-20 years. The purpose of the present investigation was to evaluate long-term results following uncomplicated crown fractures and luxations involving subsequent pulp canal obliteration. A total of 198 patients with 488 injured permanent teeth were available for clinical examination (15 year follow-up), of which 102 also answered a questionnaire and were interviewed before oral examination. Further, 82 permanent incisors presenting with pulp canal obliteration (PCO) were followed for a period of 7 to 22 yr. (mean 16 yr.). The histological evaluation of luxation injuries was performed on 123 primary teeth from 98 patients. In the experimental study (crown fractures), 64 monkey permanent maxillary and mandibular central incisors and canines were subjected to different treatment alternatives at the time of fracture. The findings in the follow-up study showed very little pulpal response to crown fracture and subsequent restorative procedures as long as there was no concomitant periodontal injury. Approximately every fourth resin composite restoration was rated unacceptable at the clinical examination. The interview showed that half of the individuals were dissatisfied with the color and/or anatomic form of the composite restoration. PCO was found in all luxation categories, and according to the survival curve, the 20-year pulp survival rate diagnosed with X-ray was 84%. Although the risk for pulp necrosis (PN) increased with time, routine endodontic intervention of teeth with ongoing PCO of the root canal did not seem justified. The histological study showed that changes in dentin were represented by occlusion of the dentinal tubules and deposition of tertiary dentin. The tertiary dentin were classified as either dentin-like, bone-like or fibrotic. In the experimental study, few changes were observed in the pulp 3 months after crown fractures, irrespective of treatment alternative.</p>","PeriodicalId":76572,"journal":{"name":"Swedish dental journal. Supplement","volume":"125 ","pages":"1-65"},"PeriodicalIF":0.0,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20402988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On surgical intervention in the temporomandibular joint.","authors":"G Widmark","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The aim of this thesis was to evaluate the indications for and the results of temporomandibular joint (TMJ) surgery in patients with long-standing severe orofacial pain and dysfunction as well as in patients with fractures of the condylar neck. The patients with long-standing pain and dysfunction had had symptoms for a mean time of 4 years, had been treated conservatively for a mean time of 2.5 years, and had undergone numerous conservative treatment methods without improvement except for a minor increase in mouth opening capacity. The indications for surgery were strict; only 1% or less of all the patients referred to the departments with a diagnosis of temporomandibular disorder (TMD) were prescribed surgery, which was considered to be the only remaining option. The TMJ surgery reduced pain, sleeping problems, and analgesic consumption and improved mouth opening capacity. The procedure showed low morbidity except for a facial nerve disturbance in three patients. Postoperatively, the bite force was observed to be normalised, and the radiographic examination showed moderate to severe osteoarthrotic changes. These changes, though extensive, were considered to be the normal outcome of diskectomy and without clinical significance, even though they resembled degenerative joint disease. In study V, surgery was performed on patients with a clear diagnosis of anterior disk displacement (ADD) with or without reduction. The preoperative pain and mouth opening capacity were markedly improved as well as other subjective symptoms. Although surgical morbidity was low, some radiographic changes were clearly detectable. In agreement with earlier reports, patients with a distinct diagnosis of ADD with or without reduction were clearly helped by diskectomy. In cases of ADD with or without reduction, it can be concluded that unsuccessful conservative treatment should not exceed 3-6 months but be discontinued in favour of the documented advantages of surgery in these cases. Patients with ankylosis should be treated surgically without delay. Unclear diagnoses such as arthralgia and osteoarthrosis with symptoms should be excluded from surgery unless overlapping muscular hyperactivity has been excluded as a major cause of the patients problem. Diskectomy is a useful surgical procedure for patients with severe long-standing TMD. It was shown in study VI that patients with dislocated fractures of the condylar neck can be successfully treated with open surgical reduction when the dislocation is large and associated with symptoms and limited function. When cognitive-behavioural profiles were measured psychometrically in study VII, a dysfunctional profile was more common in patients with myofascial pain and pain with an obscure origin than in other patients diagnosed with TMD. The dysfunctional profile was also common in patients in whom treatment of a conservative or surgical nature had failed. Among TMD patients with disk displacement, adaptive copers were most com","PeriodicalId":76572,"journal":{"name":"Swedish dental journal. Supplement","volume":"123 ","pages":"1-87"},"PeriodicalIF":0.0,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20284123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Studies of occlusal adjustment therapy in patients with craniomandibular disorders.","authors":"D Vallon","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":76572,"journal":{"name":"Swedish dental journal. Supplement","volume":"124 ","pages":"1-65"},"PeriodicalIF":0.0,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20284124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Degenerative changes of the human temporomandibular joint. A radiological, microscopical, histomorphometrical and biochemical study.","authors":"L Flygare","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":76572,"journal":{"name":"Swedish dental journal. Supplement","volume":"120 ","pages":"3-67"},"PeriodicalIF":0.0,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20021993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Children's dental health in Europe. An epidemiological investigation of 5- and 12-year-old children from eight EU countries.","authors":"A K Bolin","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>This thesis is based on a cross-sectional comparative study of dental health, treatment needs and attitudes to dental care in groups of 5- and 12-year-old children from the following eight cities in respective EU countries: Athens-Greece, Berlin-Germany, Cork-Ireland, Dundee-Scotland, Gent-Belgium, Sassari-Italy, Stockholm-Sweden and Valencia-Spain. A total of 3,200 children, 200 in each age group, were clinically examined by well-calibrated dentists, the parents completing a questionnaire on dental habits, parental and children's attitudes to dental care, smoking habits and parental occupations. The results disclosed pronounced differences in dental health and treatment need among the children from the different countries. The Scottish, Italian and German 5-year-olds exhibited the highest values for decayed, missing and filled teeth (dmft). The m component dominated for the Scottish sample, the d component in the Italian and d and f in the German sample. The highest values for DMFT in the 12-year-olds were found in the German, Greek and Italian samples followed by the Swedish sample. The F component dominated in the German and Swedish samples, while D dominated in the Greek and Italian samples. Analyses of the influence of socio-demographic and behavioural factors on the dental health, expressed as dmft/DMFT, showed that the most important factors explaining differences in caries experience were toothache, social class of the family and dental fear in the children. The frequency of similar attitudes (dental fear) in subjects and parents was 50% or higher in all the samples, and the frequency of similar dental attendance patterns in child and parent was 42% or higher in all the samples. For both age groups the proportion of subjects with regular dental attendance habits was highest in the Swedish, Belgian, German and Scottish samples. These findings, together with the high frequency of regular attenders without treatment need in the Swedish 5-year-olds indicate that organization of dental care must be closely adapted to the population it is set to serve. Separate strategies are necessary to manage the dental needs of healthy respectively diseased children. Reliable epidemiological data are necessary for planning, so that resources can be directed to the individuals with the greatest needs. However, to reach the children before onset of disease, parents, teachers, general health workers, sports coaches etc. must work jointly together with the dental profession. Among the eight countries, there is greater similarity in the organization of dental care for schoolchildren than for pre-school children. Only the Swedish system offers both preventive and restorative treatment irrespective of initiatives from the parents. In the other countries parents are mainly responsible for arranging for restorative treatment, above all for pre-school children. Different policies to promote dental health in the child population can be seen. Fluoridation of dome","PeriodicalId":76572,"journal":{"name":"Swedish dental journal. Supplement","volume":"122 ","pages":"1-88"},"PeriodicalIF":0.0,"publicationDate":"1997-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20146078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}