Abstract:
OBJECTIVE:The aim of the study was to investigate the ultrastructural features of Malassez epithelium (ME) containing protein gene product 9.5 (PGP9.5)-immunoreactive (IR) cells in the cat periodontal ligament (PDL). MATERIAL AND METHODS:Specimens from the teeth and tooth-supporting tissues of four mature cats of both sexes, 18 to 24 months of age, were used. The fixed jaws were decalcified in EDTA. Frozen sagittal sections 20 µm thick were immunostained for PGP9.5, and the ME, containing IR cells in the PDL, were evaluated under a transmission electron microscope. RESULTS:Several epithelial cells and PGP9.5 IR cells formed clusters and were enveloped by a basal lamina and separated from the surrounding connective tissue. A large nucleus and scanty cytoplasm were observed in most of the ME cells, which contained abundant keratin filaments and mitochondria. Caveolae-like structures and vesicles were found in the periphery of the ME. The small cytoplasmic processes of some of the epithelial cells extended toward the surrounding connective tissues. The cytoplasmic matrix of one type of cell comprising the ME showed immunoreactivity for anti-PGP9.5 antibody. The IR cell in the cell clusters was connected to adjacent epithelial cells and extended cytoplasmic processes toward the adjacent epithelial cells. The IR cell contained keratin filaments and abundant densely cored vesicles approximately 100-250 nm in diameter. CONCLUSIONS:The findings of the study suggest endocytotic capabilities of the epithelial cells and neuroendocrine functions of the IR cells. It is possible that the two different cell types react to extrinsic stimuli and interact with cells comprising the clusters and cords in the PDL. These ultrastructural evidences may imply functional heterogeneity of the ME in the PDL.
journal_name
Acta Odontol Scandjournal_title
Acta odontologica Scandinavicaauthors
Tadokoro Odoi
10.1080/00016350903150002subject
Has Abstractpub_date
2009-01-01 00:00:00pages
388-92issue
6eissn
0001-6357issn
1502-3850pii
914173600journal_volume
67pub_type
杂志文章abstract:OBJECTIVE:To investigate the effect of a chewing gum containing probiotic bacteria on gingival inflammation and the levels of selected inflammatory mediators in gingival crevicular fluid (GCF). MATERIAL AND METHODS:Forty-two healthy adults with moderate levels of gingival inflammation entered a double-blind placebo-co...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章,随机对照试验
doi:10.1080/00016350802516170
更新日期:2009-01-01 00:00:00
abstract::The aim was to construct and illustrate the use of diagnostic standards for recording of DFS incidence. Separate standards are presented for ranking of subjects; the mean "intermediate" DFS score per subject, which represented the majority decision of three dentists; and a certainty scale for individual tooth surfaces...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357709055996
更新日期:1977-05-01 00:00:00
abstract:OBJECTIVE:To investigate the associations between oral sugar clearance and the prevalence of dental decay. MATERIAL AND METHODS:A total of 92 (44 F, 48 M) 71-year-old subjects in Goteborg, Sweden were consecutively chosen from a representative cohort study. The subjects were examined for: 1) caries-related status, 2) ...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/00016350802378647
更新日期:2008-01-01 00:00:00
abstract::Little information is available on the effect of miswak use on gingival microbiota. We assessed levels of 28 oral bacteria in subgingival plaque of adult Sudanese miswak (n = 38) and toothbrush users (n = 36) age range 20-53 years (mean 34.6 years) to study associations between these bacteria, oral hygiene method, and...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/00016350310002784
更新日期:2003-04-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to evaluate the effect of three different irrigating solutions (17% EDTA, 10% citric acid and 2.5% NaOCl) and KTP laser irradiation on apical leakage using an electrochemical method. MATERIALS AND METHODS:Sixty extracted single-rooted human teeth with mature apices were instrume...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章,随机对照试验
doi:10.3109/00016357.2011.615338
更新日期:2012-09-01 00:00:00
abstract::The aim of this study was to compare the effectiveness of Carisolv with that of two other alkaline substances: NaOCl and Ca(OH)2. Sixty extracted teeth were randomly divided into three groups and split down the center of a carious lesion. In group I, one half of the cavity was excavated with NaOCl (0.5%, pH 11.7), the...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/00016350510019810
更新日期:2005-04-01 00:00:00
abstract::The aim was to study how three cues (patient's age and angular position and degree of impaction of the molar) were distributed among removed mandibular third molars associated with pathologic conditions and to compare these results with dentists' treatment decisions in another group of molars consisting of asymptomati...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016359709059202
更新日期:1997-12-01 00:00:00
abstract::The efficacy of oral fluconazole versus nystatin was evaluated as a treatment modality for oral candidosis. Of the included patients (n = 60), two-thirds presented with an erythematous candidosis, and the others showed clinical signs compatible with a pseudomembranous candidosis. Predisposing factors were xerostomia (...
journal_title:Acta odontologica Scandinavica
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1080/00016359850142790
更新日期:1998-08-01 00:00:00
abstract:IMPORTANCE AND OBJECTIVE:Reactive Oxygen Species (ROS) are oxygen-derived molecules that are unstable and highly reactive. They are important signaling mediators of biological processes. In contrast, excessive ROS generation, defective oxidant scavenging or both have been implicated in the pathogenesis of several condi...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章,评审
doi:10.3109/00016357.2014.954267
更新日期:2015-02-01 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:OBJECTIVES:Successful endodontic treatment depends on effective measures to eliminate and prevent infection of root canals. Initially treatment should start with isolation and disinfection of the operating field. This review makes an inventory of the available knowledge regarding its establishment and maintenance. MAT...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章,评审
doi:10.1080/00016357.2016.1195508
更新日期:2016-08-01 00:00:00
abstract:OBJECTIVE:It should be expected that type 1 diabetes mellitus may disturb innate and acquired immunity. There are no data on type 1 diabetes mellitus-related changes in the salivary flow and the protein output responsible for the innate immunity of saliva depending on the quality of dentition reflecting the age of chil...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357.2013.773071
更新日期:2013-11-01 00:00:00
abstract::This randomized clinical trial was initiated to study the effect of two restorative procedures on the clinical quality and longevity of class-III resin restorations. The material consisted of 52 pairs of class-III restorations in the microfilled resin Silar completed with two modifications of the conventional acid-etc...
journal_title:Acta odontologica Scandinavica
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.3109/00016359309040575
更新日期:1993-08-01 00:00:00
abstract::This in vitro study evaluated curing depths of a universal hybrid resin composite with two viscosities (Tetric Ceram and Tetric Flow) after curing with 6 different quartz tungsten halogen and light-emitting diode curing units. Irradiance (light intensity) of the curing units varied between 200 and 700 mW/cm2. The curi...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/00016350410006905
更新日期:2004-04-01 00:00:00
abstract:OBJECTIVE:To evaluate the performance of conventional radiography and photostimulable phosphor (PSP) plate in the detection of simulated internal root resorption (IRR) lesions in early stages. MATERIALS AND METHODS:Twenty single-rooted teeth were X-rayed before and after having a simulated IRR early lesion. Three imag...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/00016357.2017.1359331
更新日期:2017-11-01 00:00:00
abstract:OBJECTIVE:This study investigated the association between dental fear and alcohol use disorder and smoking controlling for age, gender and attained level of education as well as anxiety and depressive disorders. MATERIALS AND METHODS:Nationally representative data on Finnish adults, 30 + years old (n = 5953), were gat...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357.2012.680902
更新日期:2013-03-01 00:00:00
abstract::Six linear strain gauges and one rosette strain gauge were used on three different types of models prepared from one partially dentate subject, to study loading deformation in a six-unit fixed mandibular bridge. The bridge was mounted on each of the models on an adjustable articulator and loaded in a universal testing...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016358408993877
更新日期:1984-08-01 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::Over the past 2 decades, it has been suggested that with the generalized availability of fluoridated dentifrices, and coupled with a possible increased likelihood of fluorosis, the benefits of community-based fluoridation have receded. However, while this may be so for dentally motivated populations, there are convinc...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章,评审
doi:10.1080/000163599428616
更新日期:1999-12-01 00:00:00
abstract::Individual differences in tooth discoloration have been observed after using chlorhexidine mouth rinses. To study the correlation between retention of chlorhexidine and the discoloration tendency, two groups, 'stainers' and 'non-stainers', were selected. The following parameters were tested: initial retention of chlor...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016358309162323
更新日期:1983-08-01 00:00:00
abstract:OBJECTIVE:To determine chitosan-based chewing gum role on reducing salivary S. mutans counts and salivary pH. MATERIALS AND METHODS:The present double-blind randomised clinical trial with the trial registration number of IRCT20190724044319N1 was conducted on 36 dental students. The volunteers were, randomly, divided i...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/00016357.2020.1836392
更新日期:2020-11-03 00:00:00
abstract:OBJECTIVE:The aim of this study was to evaluate the influence of coffee and red wine staining on tooth color during and after bleaching. MATERIALS AND METHODS:Blocks obtained from human molars were divided into 11 groups (n = 5) in accordance with the bleaching treatment-peroxide carbamide 10%, 15% or 20%-and in accor...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357.2013.771404
更新日期:2013-11-01 00:00:00
abstract:OBJECTIVE:To evaluate the smear layer removal and wettability of AH Plus sealer on root canal dentin treated with MA (maleic acid), MA + CTR (cetrimide) and MA + CTR + CHX (chlorhexidine) as final irrigating regimens. MATERIAL AND METHODS:For smear layer removal, 40 teeth were instrumented to size F4 and divided into ...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/00016357.2017.1402208
更新日期:2018-04-01 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::Causes of traumatic dental injuries were studied in a sample of 321 Finnish children with injured permanent incisors. In girls the most common cause was falls (36.7%), and with boys sports (33.6%). Among the sports accidents, gymnastics dominated for girls and ice hockey for boys. Bicycling was also a markedly frequen...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016358009004714
更新日期:1980-01-01 00:00:00
abstract::Three rosette strain gauges were attached to a fixed bilateral cantilevered crossarch maxillary bridge and one linear strain gauge to an attachment-retained removable partial denture (RPD), to study the functional deformation pattern in this combined reconstruction. The deformation under clinical conditions at maximum...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016359309040584
更新日期:1993-12-01 00:00:00
abstract:OBJECTIVE:To evaluate the surface roughness of IPS Empress 2 ceramic when treated with different finishing/polishing protocols. MATERIALS AND METHODS:Sixteen specimens of IPS Empress 2 ceramic were made from wax patterns obtained using a stainless steel split mold. The specimens were glazed (Stage 0-S0, control) and d...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357.2012.690570
更新日期:2013-05-01 00:00:00
abstract::The abrasion responses were tested on four acrylic veneer materials, K + B Plus, K + B 75, Isosit, and Ivocron. The studies were performed in two independent research laboratories. Two different brushing machines were used with an abrasive slurry. The results were used for comparing the degree of abrasion for the resi...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016358409033617
更新日期:1984-12-01 00:00:00
abstract:OBJECTIVE:Composite restorative materials represent one of the most important groups of materials in contemporary dental practice. However, their incomplete polymerization may lead to monomer-induced genotoxicity. The objective of this study was to evaluate the genotoxicity of three flowable (Filtek Supreme XT Flow, Te...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357.2012.734419
更新日期:2013-05-01 00:00:00
abstract:OBJECTIVE:Gingival fibroblasts (GFs) produce pro-inflammatory cytokines in response to stimulation with lipopolysaccharide (LPS) of Porphyromonas gingivalis, which is thought to be mediated by activation of toll-like receptors (TLR)2 and TLR4. The present study investigated the expression of interleukin (IL)-6, TLR2, a...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357.2013.834535
更新日期:2014-07-01 00:00:00