Abstract:
:Qualitative and quantitative features of mammalian tooth enamel structure are increasingly being used in taxonomic and phylogenetic analyses, although the variability shown by these traits has not received adequate consideration. This study evaluates the variability displayed by nine quantitative parameters in deep, intermediate, and superficial molar enamel in the closely related bovids Ovis aries and Capra hircus. These parameters are assessed in terms of the absolute and/or relative variability evinced at a given depth within a single individual, among conspecific individuals, and between species samples. The degrees of relative variability expressed at a given depth are comparable among conspecific individuals and between taxonomic samples. Nevertheless, in many instances, there are significant differences in absolute variability amongst individuals. Also, in four parameters for which individual specimen averages could be calculated, the equality of these means among conspecifics can be rejected. Variability is not equivalent at different enamel depths. The null hypothesis of equality of individual, conspecific variances can be rejected most commonly for parameters measured in deep and superficial enamel, and coefficients of variation also tend to be higher for deep and superficial enamel than for enamel of intermediate depth. The greater variability displayed by deep and especially superficial enamel may be related to the initial onset and the terminal phase of ameloblastic secretory activity. Taxonomic and phylogenetic analyses that utilize quantitative data on enamel structure are valid only if comparisons have been made at equivalent enamel depths.
journal_name
Acta Odontol Scandjournal_title
Acta odontologica Scandinavicaauthors
Grine FE,Krause DW,Fosse G,Jungers WLdoi
10.3109/00016358709094349subject
Has Abstractpub_date
1987-02-01 00:00:00pages
1-23issue
1eissn
0001-6357issn
1502-3850journal_volume
45pub_type
杂志文章abstract:OBJECTIVE:The aim of this study was to ascertain whether child-related and parent-related characteristics were associated differently with oral health-related lifestyle among boys and girls. MATERIAL AND METHODS:The study population consisted of 5th and 6th graders and their parents in Pori, Finland. There were 1691 c...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/00016350701308356
更新日期:2007-08-01 00:00:00
abstract::The masticatory efficiency of subjects with all natural teeth, with complete upper and partial lower dentures, and with complete dentures was measured. Two different methods were used. The results showed significant differences among the groups irrespective of the method used. The subjects with dentures compensated fo...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016358509064144
更新日期:1985-07-01 00:00:00
abstract:OBJECTIVE:Chronic inflammation has earlier been detected in ruptured intracranial aneurysms. A previous study detected both dental bacterial DNA and bacterial-driven inflammation in ruptured intracranial aneurysm walls. The aim of this study was to compare the presence of oral and pharyngeal bacterial DNA in ruptured a...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357.2015.1130854
更新日期:2016-01-01 00:00:00
abstract:OBJECTIVE:To incorporate a metal framework into removable partial dentures, the dimensional accuracy of thermoplastic resins requires precision equivalent to conventional acrylic resins. This study aimed to evaluate the fitting accuracy of thermoplastic resins compared to heat-cured acrylic resin. MATERIALS AND METHOD...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357.2014.946966
更新日期:2015-01-01 00:00:00
abstract::The aim of this study was to determine dental health status in two separate groups of Chilean and Polish refugees in Sweden. In Scandinavia, Sweden has the largest number of immigrants--1 million out of a population of 8.3 million. Since 1975, most immigrants have been refugees and their families. During 1978-82 Swede...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016358809004742
更新日期:1988-02-01 00:00:00
abstract::The aim of this study was to evaluate the caries-preventive effect of an oral health program for preschool children living in a multicultural, low socio-economic area. In total, 804 2-year-old children were invited and recalled every 3rd month to an outreach facility for parent education and toothbrushing instruction....
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/00016350510019900
更新日期:2005-06-01 00:00:00
abstract::In the present investigation the microstructure and bonding between the wrought and cast elements of the post and core specimens were evaluated with respect to the preheating temperature of the investment. Clinically sized specimens were produced from one type III gold casting alloy in combination with two different w...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016358209019819
更新日期:1982-01-01 00:00:00
abstract::A series of rapid and simple chromatographic purification procedures for peroxidase-like enzymes occurring in the human oral cavity is presented. Samples of whole saliva, parotid saliva, gingival exudate and various bacterial preparations contain peroxidases which were purified using molecular exclusion and ion exchan...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357609002561
更新日期:1976-01-01 00:00:00
abstract::A representative sample, 55%, of the patients treated endodontically by undergraduate students in a teaching clinic during the years 1963 to 1969 were reexamined 10-17 years later. Gutta-percha/Kloroperka-NO root fillings (282), classified as having surplus material at the time of treatment, were evaluated in follow-u...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016358709098856
更新日期:1987-06-01 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::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:This study was undertaken to determine the potential of dental adhesive products to induce mucosal irritation based on their ability to damage the blood vessels of the chorioallantoic membrane (CAM) in fertilized hen's egg. MATERIAL AND METHODS:Twenty-seven dental adhesive products (total 36 solutions) cover...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/00016350701589286
更新日期:2007-10-01 00:00:00
abstract::The craniofacial morphology of 48 consecutive adult males with isolated cleft palate was studied by means of lateral cephalograms at the mean age of 18.8 years. Twelve of the patients had received pharyngeal flap surgery between 4 and 12 years of age (mean age 6 years) to improve speech. No significant differences wer...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/00016350310003846
更新日期:2003-06-01 00:00:00
abstract::We assessed the effects of oral self-care on periodontal health indicators among adults with diabetes. The sample consisted of 120 dentate individuals, all of whom were regular patients at the Salo Regional Hospital Diabetes Clinic in southwest Finland. Clinical periodontal examination included identification of visib...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/000163501317153257
更新日期:2001-12-01 00:00:00
abstract:OBJECTIVE:To evaluate the degree of conversion (DC) of two light-cured composites with different protocols of light curing. MATERIALS AND METHODS:One hundred and ninety two specimens (n = 8) were prepared (5 mm × 2 mm) according to experimental groups: two composite resins (Filtek Supreme and four seasons); three ligh...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357.2014.920108
更新日期:2014-11-01 00:00:00
abstract::Bone meal (containing 500 ppm F) was added to the diet of growing rats in an amount corresponding to that recommended ingested by children. Addition of bone meal did not influence body weight increment, or growth and ash content of bone and teeth. Fluoride in bone and teeth increased as compared to control animals, bu...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016358109162295
更新日期:1981-01-01 00:00:00
abstract::Twenty-seven gold crowns, removed from patients with problems such as diffuse pain and metallic taste, have been examined. The gold crowns were made of an ordinary casting gold alloy, type III. The crowns were built on amalgam cores or big amalgam fillings. Eight of these crowns had cracks beginning at the cervical ma...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016358509064134
更新日期:1985-03-01 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: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::The purpose of this study, comprising two parts, was to investigate the congruence between answers given by general dentists in questionnaires concerning prosthodontic services and the recorded information on the services actually performed by each dentist. In Part I it is investigated whether questionnaire reports of...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/000163599429048
更新日期:1999-02-01 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::Errors in questionnaire surveys are usually of one of two sources: non-responses or incorrect answers. The aim was to investigate the validity of a questionnaire survey and to estimate the respective bias of these answers. Of 9,283 subjects selected to receive a questionnaire by post, 3,949 (43%) responded, and, of th...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/000163599428643
更新日期:1999-10-01 00:00:00
abstract::When grown on agar, most Actinobacillus actinomycetemcomitans form circular and convex colonies with an internal star-shaped morphology. Such colonies adhere firmly to the agar, and when removed, a star-shaped imprint similar to that of the intact colony remains. This study was undertaken to determine the nature of th...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016359009033622
更新日期:1990-10-01 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 plaque and gingival condition in 232 Swedish schoolchildren aged 13-14 years has been related to the following predictors; plaque, toothbrushing frequency and technique, bristle stiffness of the toothbrush, smoking habits, use of snuff, social class and sex. Multiple regression analyses have been performed in orde...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016358209024074
更新日期:1982-01-01 00:00:00
abstract:OBJECTIVE:To investigate the expression of Wnt3a, Wnt10b, β-catenin and DKK1 in the periodontal ligament (PDL) during orthodontic tooth movement (OTM) in rats. MATERIALS AND METHODS:Nickel-titanium closed-coil springs were used to deliver an initial 50 g mesial force to the left maxillary first molars in 30 rats. The ...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016357.2015.1090011
更新日期:2016-01-01 00:00:00
abstract::Sucking habits and their connection with family background was investigated in 3-year-old Finnish children. The association between sucking habits and malocclusion was also studied. The study was based on a survey with stratified randomized cluster sampling, confidential questionnaires, and clinical dental examination...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016359309041144
更新日期:1993-02-01 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::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:BACKGROUND AND OBJECTIVE:radioiodine treatment (I131) used to treat thyroid carcinomas produces side effects (sialadenitis, xerostomia, dysphagia and caries susceptibility) reflecting in a poor patient quality of life. This study aimed to evaluate the effect of I131 on salivary function and possible oral impairment. M...
journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.1080/00016357.2017.1399214
更新日期:2018-03-01 00:00:00