Abstract:
:The use of permanent magnets in orthodontic treatment has increased significantly over the past years, triggered by the introduction of rare earth magnetic alloys. Concerns about possible side effects have been expressed relating to their use in orthodontic treatment. In previous experimental studies evidence of a reduction in bone formation and epithelial turnover close to rare earth magnets has been presented. The aim of the present study was twofold: to confirm earlier results and to study whether the observed changes are reversible. One hind leg in each of 45 rats was fitted with aluminum rings with Co5Sm magnets, whereas the other hind leg was fitted with sham rings. After 8 weeks 25 rats were killed, and the rings in the remaining rats were removed. The latter group was killed after another 11 weeks. The epithelial and bone reactions were evaluated histomorphometrically. Previous results showing thinner epithelium and retarded rate of bone formation close to Co5Sm magnets were confirmed. These effects were also shown to be largely reversible. It was concluded on the basis of this and the magnitude of the effects that any local side effects from orthodontic rare earth magnets appear negligible when extrapolated to the clinical situation.
journal_name
Acta Odontol Scandjournal_title
Acta odontologica Scandinavicaauthors
Linder-Aronson A,Rygh P,Lindskog Sdoi
10.3109/00016359509005983subject
Has Abstractpub_date
1995-08-01 00:00:00pages
259-63issue
4eissn
0001-6357issn
1502-3850journal_volume
53pub_type
杂志文章abstract::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, als...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016359409029043
更新日期:1994-10-01 00:00:00
abstract::It was the purpose of the study to test the efficacy of brushing with a 1% chlorhexidine gel or a commercial solution cleanser (Steradent) in preventing formation of plaque on the fitting surface of new dentures. The study group consisted of 74 denture wearers with denture stomatitis who were assigned randomly to one ...
journal_title:Acta odontologica Scandinavica
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.3109/00016357809027570
更新日期:1978-01-01 00:00:00
abstract::Corrosion of base metal alloys was studied by placing the alloys in artificial saliva for 2 months and then determining the concentration of metal ions in the saliva. The distribution of the attack on the surface was examined. The results indicated that the amount of metal ions in the artificial saliva could be relate...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357809004659
更新日期:1978-01-01 00:00:00
abstract::The influence of different stone mixing agents, impression materials and lubrication methods on the surface hardness of a stone die material has been evaluated. For one impression material the dimensional effect of the mixing agents and lubrication on the dies was also studied. The stone die material was mixed with wa...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357509004622
更新日期:1975-01-01 00:00:00
abstract:OBJECTIVE:Considering that patients' satisfaction is one of the most important goals in conducting removable dental prosthesis (RDP) therapy and the fact that there are many factors which influence this parameter, the present study aims to evaluate the expectation before and satisfaction after therapy with RDP in patie...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357.2012.654612
更新日期:2013-01-01 00:00:00
abstract::This study aimed at determining alveolar bone height in musicians playing wind instruments and non-wind instruments. Two hundred and forty-two subjects, 208 men and 34 women, from 3 national orchestras in Stockholm were examined in an intraoral full-mouth survey. The height of alveolar bone, registered by a computeriz...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016358609026566
更新日期:1986-06-01 00:00:00
abstract::The aim of the study was to evaluate the efficacy of plaque removal of three different toothbrushes on mentally disabled children in two different age groups. A manual triple-headed brush (SuperBrush; Dento Co. AS [junior, regular]) compared with a new manual toothbrush (CrossAction; Oral-B [35 compact, 40 regular]) a...
journal_title:Acta odontologica Scandinavica
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1080/00016350410010054
更新日期:2004-12-01 00:00:00
abstract::Epidemiological data, particularly concordance rates in twin pairs and in multiply affected families, provide strong evidence that both genetic and environmental influences are important in the development of the chronic intestinal inflammation characteristic of Crohn disease and ulcerative colitis. Furthermore, suppl...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章,评审
doi:10.1080/000163501750266800
更新日期:2001-06-01 00:00:00
abstract::The purpose of the present investigation was to study prevalence of periodontal disease among 30 to 39-years-old from Oporto in the north of Portugal. In addition, an attempt was made to elucidate possible periodontal disease determinants in this population. A random sample consisting of a total of 322 individuals was...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/000163500750051746
更新日期:2000-10-01 00:00:00
abstract:OBJECTIVES:(i) To validate caries risk profiles assessed with a computer program against actual caries development in preschool children, (ii) to study the possible impact of a preventive program on the risk profiles, and (iii) to compare the individual risk profiles longitudinally. MATERIAL AND METHODS:Caries risk wa...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/00016350802714734
更新日期:2009-01-01 00:00:00
abstract::According to several studies on human populations, the mandible deviates on opening significantly more often to the left than to the right. An association between the asymmetry of opening and handedness has been suggested. The present study of 143 left-handed Finnish conscripts showed no significant difference from th...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章,评审
doi:10.3109/00016358909167309
更新日期:1989-04-01 00:00:00
abstract::Patients with chronic orofacial pain often undergo endodontic therapy or surgery in an attempt to eliminate or relieve their symptoms. This study examined the relationship among invasive dental treatment, pain reports, and disease conviction in a group of patients referred for pain management. Forty-eight patients ref...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016359509005943
更新日期:1995-02-01 00:00:00
abstract:OBJECTIVE:To estimate the prevalence of dental erosive wear among five-year-olds in Bergen, Norway, and to investigate associations between background factors and the condition. METHODS:A total of 387 children received a dental examination in five Public Dental Service clinics in Bergen, Norway. The parents responded ...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/00016357.2020.1791357
更新日期:2020-07-21 00:00:00
abstract:INTRODUCTION:The aim of this study is to compare the root canal transportation with the PathFile-ProTaper recommended protocol, PathFile-ProTaper modified protocol and stainless steel K-flexofiles. METHODS:Forty-five ISO 15, 0.02 taper S-shaped Endo Training Blocks were divided randomly into three groups of 15 each an...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357.2013.805430
更新日期:2014-01-01 00:00:00
abstract::Ceramic inlays offer a good alternative to posterior composites, which still show a high polymerization shrinkage. The thin cement layer will reduce the total amount of shrinkage and probably result in a better marginal adaptation and decreased marginal leakage. Fired feldspathic ceramic inlays cemented with either a ...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016359409027588
更新日期:1994-06-01 00:00:00
abstract:OBJECTIVE:This study evaluated the fracture resistance of different zirconia three-unit posterior all-ceramic fixed partial dentures before and after fatigue loading. MATERIAL AND METHODS:Forty-eight zirconia three-unit posterior all-ceramic fixed partial dentures were fabricated using different manufacturing systems ...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/00016350600856232
更新日期:2007-02-01 00:00:00
abstract:OBJECTIVE:The clinical features of the early stages of bisphosphonate-related osteonecrosis of the jaw (BRONJ) in patients with breast cancer remain unclear. A retrospective cohort study was conducted of patients with breast cancer who received intravenous bisphosphonate (BP) treatment in a single center in order to cl...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357.2014.887772
更新日期:2014-11-01 00:00:00
abstract::In this methodological study we investigated the usefulness and reliability of a questionnaire designed to capture 4 aspects of parental dental attitudes: dental knowledge, child oral health behavior, perceived importance of dental related aims, and parental responsibility. The study was undertaken in a group of 140 p...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/000163501300035706
更新日期:2001-02-01 00:00:00
abstract:OBJECTIVE:This study investigated the influence of preparation design on the marginal and internal gap and ceramic thickness of partial ceramic crowns (PCCs) fabricated with the CEREC 3 system. MATERIALS AND METHODS:Sixteen extracted human mandibular molars were prepared according to two different preparation designs ...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357.2014.956145
更新日期:2015-02-01 00:00:00
abstract::The aim of the study was to assess the oral health of a group of children, and to compare the findings with the results from an investigation performed 4 years earlier in children of the same age and living in the same area. The material consisted of 149 randomly selected 8-year-old children. The study included examin...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357509026354
更新日期:1975-01-01 00:00:00
abstract::Occlusar carious lesions from human molars, preserved in continuous humidity after extraction, were removed using conventional clinical techniques. Bacteriological samples were taken after rinsing the cavity with water only, after experimentally infecting the cavity and after treating uninfected cavities either with a...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357709064125
更新日期:1977-01-01 00:00:00
abstract:OBJECTIVE:To evaluate the relative abrasivity of different toothpastes and polishing pastes both qualitatively and quantitatively. MATERIALS AND METHODS:Acrylic plates were exposed to brushing in a brushing machine with a toothpaste/water slurry for 1 and 6 h. Twelve different toothpastes were used and also four diffe...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357.2012.696693
更新日期:2013-05-01 00:00:00
abstract::The aim of this study was to compare the effects on the level of serotonin (5-HT) in the masseter muscle by intramuscular glucocorticoid (GC) administration in patients with fibromyalgia (FM) and localized myalgia (LM), as well as to determine associated changes in pain, tenderness, and microcirculation. The study com...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/000163598422857
更新日期:1998-06-01 00:00:00
abstract::The purpose of this study was to assess the antimicrobial effect of TiF4 as compared with equimolar solutions of NaF, APF, and SnF2 and to evaluate the effect, if any, on bacterial growth on topically treated tooth surfaces. In an in vitro study, paper discs impregnated with 20 microliters of equimolar solutions of Sn...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016359009005872
更新日期:1990-06-01 00:00:00
abstract::Fluorescent microspheres (FM) were used to visualize and semi-quantify blood flow in the temporomandibular joint (TMJ) during experimental unilateral traumatic occlusion of the maxillary and mandibular molar teeth in 30 young rats. At different postoperative observation periods varying from 1 to 30 days FM were inject...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016359309040580
更新日期:1993-10-01 00:00:00
abstract::The purpose of this study was to record the caries status in children attending public primary schools in Nairobi. The sample comprised 513 children, 262 aged 6-8 years and 251 aged 13-15 years. The children were drawn from six randomly selected schools in the city. Clinical examination was carried out in a room with ...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016359209012772
更新日期:1992-10-01 00:00:00
abstract:OBJECTIVE:The Psychosocial Impact of Dental Aesthetics Questionnaire (PIDAQ) is an instrument developed for assessment of orthodontic aspects of oral health-related quality of life (OHRQoL). This study aimed to translate and validate the Swedish version of PIDAQ for use in Swedish adolescents 12-19 years of age. MATER...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/00016357.2020.1823014
更新日期:2020-10-07 00:00:00
abstract::Symptoms of mandibular dysfunction were followed up longitudinally from the age of 17 to 19 years in 285 adolescents. Totally, 27 subjects dropped out, leaving 258 for the longitudinal intraindividual comparisons. Reports of TMJ sounds increased significantly with age from 14% to 23% for girls, and at 19 years of age ...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016358609094342
更新日期:1986-12-01 00:00:00
abstract:OBJECTIVE:The objective of the study was to evaluate orofacial dysfunction in individuals with Prader-Willi syndrome (PWS) and compare it with a healthy reference group. METHODS AND MATERIALS:The Nordic Orofacial Test-Screening (NOT-S) protocol was used for evaluation of orofacial function in 45 (23 Male, 22 Female) i...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357.2011.568961
更新日期:2011-09-01 00:00:00
abstract::Plaque formed during a 5-day xylitol or sucrose chewing gum diet was used as an irritating agent in bone and macrophage culture. The release of hydrolytic enzymes was monitored. The contents of protein, DNA, and ATP were analyzed, to characterize plaque formed during different dietary periods. The release of glycosida...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016358309162320
更新日期:1983-06-01 00:00:00