Abstract：
:Simultaneous records of masseter-EMG activity and position of the mandible were made on 4 Wistar rats eating four food types: standard food pellets (large pellets), 45 mg precision food pellets (small pellets), bread and pudding. Masseter activity was recorded with chronic bipolar silver EMG electrodes placed within the muscle and led subcutaneously to a pedestal on the head. The transducer indicating jaw position consisted of two tiny inductance coils, placed on the head and under the mandibular symphysis. The lower coil acted as a receiving aerial for the carrier signal supplied via the upper coil, so that distance between the coils, and thus relative jaw position, was traced on the oscilloscope screen. A silent period was found in the masseter-EMG bursts similar to that found in man, where the silent period represents tooth contact and the occlusal phase of chewing (time during which teeth are in the intercuspal position) is defined as the interval between the silent period and the termination of the EMG activity in the muscle. Applying this to the rat data, opening represented 70-75 per cent of the total cycle while the combined closing and occlusion phases comprized 25-30 per cent when either type of pellet was eaten. With bread, closing and occlusal phases represented 56 per cent of the total cycle. For all three food types, muscular force, as indicated by the jaw-closing movement registered by the transducer, continued beyond the masseter EMG. Irregular jaw movements seen when the animals lapped pudding were not correlated directly with masseter activity.
journal_name
Arch Oral Bioljournal_title
Archives of oral biologyauthors
Thomas NR,Peyton SCdoi
10.1016/0003-9969(83)90060-2subject
Has Abstractpub_date
1983-01-01 00:00:00pages
1043-6issue
11eissn
0003-9969issn
1879-1506journal_volume
28pub_type
杂志文章abstract：:An engineering model of the periodontal ligament fibres was used to calculate length changes in the fibres with: direct occlusal forces on the tooth, occlusal loads on other teeth in the arch and splinting. The fibre elongations appear to influence tooth eruption, the clinical behaviour of splinted and non-splinted te...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/0003-9969(88)90109-4
更新日期：1988-01-01 00:00:00
abstract：:The aim of this study was to test the hypothesis that hypoxia and interleukin-1 (IL-1)beta played a substantial role in gene expressions of matrix metalloproteinases (MMPs) in temporomandibular joint (TMJ) disc cells. The TMJ disc cells were isolated from rabbit TMJ, and cultured in Dulbecco's modified Eagle's medium ...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2004.06.006
更新日期：2005-01-01 00:00:00
abstract：:Eruption results in the movement of the tooth from an intraosseous to a functional position in the mouth. This physiological movement occurs through a path of least resistance and is mediated by the dental follicle. In this study the presence of a 80-kDa proteinase of the gelatinase family in the dental follicle of ma...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/0003-9969(94)00168-b
更新日期：1995-04-01 00:00:00
abstract：:The number of Strep. mutans in saliva samples was examined in 101 13-14-year-old children, 53 in a control and 48 in the test group. All in the test group with 2.5 X 10(5) Strep. mutans per ml saliva were treated with 1 per cent chlorhexidine gel, once a day, for 14 days when the number of Strep. mutans was greatly re...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/0003-9969(82)90042-5
更新日期：1982-01-01 00:00:00
abstract：OBJECTIVE:To compare the densities of CD1a + immature and CD83+ mature dendritic cells, and inflammatory infiltrate cells between smokers and non-smokers with oral leukoplakia. Parameters associated with malignant transformation were also evaluated. DESIGN:21 smokers and 23 non-smokers diagnosed with oral leukoplakia ...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2018.07.008
更新日期：2018-11-01 00:00:00
abstract：OBJECTIVES:The present study aimed firstly, to investigate whether pulpal circulatory changes elicited by innocuous tooth cooling and foot heating can be monitored with transmitted-light plethysmography (TLP), which detects pulpal blood volume changes, and secondly, to assess the effect of autonomic nervous control on ...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2020.104881
更新日期：2020-11-01 00:00:00
abstract：:Counts of cultivable Porphyromonas gingivalis, assays of microbial proteases and the concentration in gingival crevicular fluid of proteoglycan metabolites were investigated at periodontitis and gingivitis sites in 16 patients with chronic adult periodontitis before and after treatment. Two periodontitis sites and two...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/s0003-9969(96)00103-3
更新日期：1997-01-01 00:00:00
abstract：OBJECTIVE:We have applied fluorimetric method to monitor aldehyde dehydrogenase (ALDH*) activity in human saliva samples to study inactivation, reactivation and inhibition of the enzyme. DESIGN:Saliva samples were collected to buffer stock solution, containing various thiols, and assayed in the presence of the fluorog...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2007.11.004
更新日期：2008-05-01 00:00:00
abstract：OBJECTIVE:Tooth eruption is a multifactorial process in which bone tissue plays a prevailing role. In this study we evaluated the bone overlying the developing tooth germ and the degree of tooth eruption of the first mandibular molar in pups born to mothers subjected to constant light during pregnancy. DESIGN:Pregnant...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2013.08.003
更新日期：2013-11-01 00:00:00
abstract：OBJECTIVE:To compare the tissue reactions to implanted collagen scaffolds in the palate and the skin of rats. DESIGN:Crosslinked collagen scaffolds were implanted submucoperiosteally in the palate, and subcutaneously on the skull and on the back of 25 rats and evaluated after up to 16 weeks. On H&E-stained sections, t...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2007.11.003
更新日期：2008-04-01 00:00:00
abstract：:The aim was to examine the nature of enamel dissolution in aqueous suspensions with a high solid/solution ratio and in a CO2-rich atmosphere. Before experimentation, a water-saturated mixture of 95% N2-5% CO2 was passed through the acid solutions for 24 hr. Samples of 2 g of powdered enamel were suspended in 7 ml of e...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/s0003-9969(97)00043-5
更新日期：1997-09-01 00:00:00
abstract：:Using this method, without denaturing agents, over 60 protein components in 2 microliter (about 4 micrograms of protein) of unconcentrated parotid saliva could be detected. After two-dimensional separation, the spots of albumin, secretory IgA, IgG, acid phosphatase, amylase and plasma-originating protein were identifi...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/0003-9969(86)90048-8
更新日期：1986-01-01 00:00:00
abstract：:Designing a temporomandibular joint (TMJ) total prosthesis requires the assessment of joint displacements for open/close movements. Current knowledge presents disc-condyle motions as involving both translation and rotation but there may be substantial variations from human to human. The aim of this study is to discrim...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2007.11.010
更新日期：2008-05-01 00:00:00
abstract：:The bioconcentration of lipophilic organochlorines in ovine dentine in comparison to adipose tissue was examined. Sheep were given a single dose (0.2-1.4 mg/kg body wt) of individual polychlorobiphenyl (PCB) congeners (tetrachlorobiphenyls IUPAC Nos. 54 and 80, and hexachlorobiphenyls IUPAC Nos. 155 and 169) and organ...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/s0003-9969(01)00079-6
更新日期：2001-12-01 00:00:00
abstract：OBJECTIVE:The inflammatory cytokine interleukin-1 (IL-1) decreases mineralisation by immortalized mouse-derived cementoblastic cells (OC-CM cells), whilst various prostanoids, including fluprostenol (flup) increase it. Subtraction hybridisation conducted on flup minus IL-1-treated OC-CM cells revealed that one of the p...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2009.01.013
更新日期：2009-05-01 00:00:00
abstract：:The characteristics of the mucosal immune response to Streptococcus mutans cells, antigen A, antigen B, glucosyltransferases and glucan-binding proteins were examined in four pregnant chimpanzees that had been immunized perorally with Strep. mutans. Six pregnant chimpanzees served as non-immunized controls. None of th...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/s0003-9969(99)00075-8
更新日期：1999-10-01 00:00:00
abstract：:Hinokitiol, a natural iron-chelating agent, is known to have diverse biological and pharmacological activities in various cell types. However, the effect of hinokitiol on dental pulp cells has not yet been reported. In this study, hinokitiol increases hypoxia-inducible factor-1α (HIF-1α) protein levels and vascular en...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2013.10.009
更新日期：2014-02-01 00:00:00
abstract：OBJECTIVE:Some saliva substitutes have been shown to demineralize dentine in vitro. This effect is counteracted by the application of various fluorides. In contrast, remineralizing saliva substitutes might be supported by these treatments, depending on the dynamics during remineralization. The aim of this in vitro stud...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2011.01.002
更新日期：2011-08-01 00:00:00
abstract：OBJECTIVE:This study aimed to evaluate the effect of fluoridated dentifrice (FD) and mouthwash (FM) under different treatment regimens on root caries (RC) inhibition. METHODS:Dual-species biofilms formed by Streptococcus mutans and Lactobacillus casei were grown on the surface of bovine root dentine slabs which were e...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2015.07.018
更新日期：2015-10-01 00:00:00
abstract：OBJECTIVES:Radiographic dental age estimation methods are viable in the living and deceased. One such method [Kvaal et al. Forensic Sci Int 1995;74:175-85] quantified secondary dentinal deposition indirectly through measurements of tooth and pulp lengths and widths. The method is untested on non-European populations an...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2011.08.020
更新日期：2012-03-01 00:00:00
abstract：:Enamel and cementum pellicles form by different adsorption of salivary and serum components to the tooth surface. The authors compared the constituents of surface pellicle formed on human enamel and cementum under three conditions: (1) natural pellicle, present on extracted teeth, which was formed by prolonged exposur...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/s0003-9969(87)80013-4
更新日期：1987-01-01 00:00:00
abstract：AIM:This study was planned to investigate whether smoker patients with inflammatory periodontal disease exhibit different salivary concentrations of C-telopeptide pyridinoline cross-links of type I collagen (ICTP) and osteocalcin (OC) compared to the non-smoker and/or ex-smoker counterparts. METHODS:Whole saliva sampl...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2009.09.009
更新日期：2009-12-01 00:00:00
abstract：:This enzyme activity was examined in bone cells cultured for 8-10 days; the calcium concentration was 1.87 +/- 0.05 (n = 10) mM in the control medium and 0.34 +/- 0.02 (n = 10) mM in the low-calcium medium. The activity was significantly lower in the low-calcium group than in the control (p less than 0.01). The cytoso...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/0003-9969(92)90074-i
更新日期：1992-09-01 00:00:00
abstract：OBJECTIVE:To determine whether chewing side preference is related to handedness and lateral asymmetry of occlusal characteristics, muscular force and temporomandibular disorders (TMD) in a dentate population. DESIGN:One hundred and seventeen dentate adults participated in this cross-sectional study. Static and dynamic...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2008.09.006
更新日期：2009-02-01 00:00:00
abstract：OBJECTIVE:This study evaluated changes in protein profile of the acquired enamel pellicle (AEP) formed in vivo, after application of gels containing chlorhexidine or EGCG and further challenge with citric acid. DESIGN:AEP was formed in 9 volunteers for 2h and then treated with one of the following gels: placebo, 400μM...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2017.05.024
更新日期：2017-10-01 00:00:00
abstract：:Physiological evidence is presented for the existence of commissural fibres that cross the midsagittal plane in the medulla of the rat at the level of the trigeminal motor nucleus (Mo5). These fibres, which have their origin in the Mo5, terminated in the contralateral Mo5. Small inhibitory postsynaptic potentials were...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/0003-9969(93)90170-q
更新日期：1993-12-01 00:00:00
abstract：:A genomic library of Bacteroides gingivalis W83 chromosomal DNA was constructed in the Escherichia coli lambda (lambda) vector EMBL 4. Three recombinant lambda phages expressing a cloned protease were identified in the library. All three lambda phages contained cloned overlapping DNA fragments from the same region of ...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/0003-9969(90)90137-y
更新日期：1990-01-01 00:00:00
abstract：OBJECTIVE:The RNA-binding proteins Lin28 and Lin28b are expressed in many developing tissues and are involved in the biosynthesis of the microRNA let-7 family and embryogenesis processes. However, their roles in mammalian tooth development remain ill-defined. DESIGN:The spatiotemporal expressions of Lin28 and Lin28b d...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2017.06.023
更新日期：2017-10-01 00:00:00
abstract：OBJECTIVE:To assess a panel of risk factors associated to oral candidosis (OC) onset and its chronic maintenance by means of fuzzy logic (FL) approach and statistical traditional methodology (STM); to investigate their casual relationship within a multifactorial framework. DESIGN:Case-control study. SETTING:One hospi...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/j.archoralbio.2007.11.009
更新日期：2008-04-01 00:00:00
abstract：:The development of fatigue was investigated by electrical stimulation in 15 domestic pigs (1 yr old, 70-90 kg body weight) and seven adult dogs (3 yr old, 45 kg body weight). After anaesthesia, silver electrodes were implanted in the anterior and posterior parts of the right masseter muscles. The contralateral muscle ...
journal_title：Archives of oral biology
pub_type： 杂志文章
doi：10.1016/0003-9969(92)90031-3
更新日期：1992-12-01 00:00:00
