Abstract：
:EMG recordings of the left and right masseter and lateral pterygoid muscles were repeated three times in 15 young adults to test the reproducibility of the signals. Two tests were made on the same day (morning and afternoon) and one test three days later (morning). Needle and hook electrodes were used for the masseter muscle and needle electrodes for the lateral pterygoid muscle. The superficial areas of recording were tattooed on the skin. An intra-oral approach was selected for the lateral pterygoid muscle. The subjects were asked to perform three definite tasks for the masseter muscle (intercuspid occlusion, maximum protrusion, and centric relation with a bite opening of 3mm) and two for the pterygoid muscle (maximum opening and maximum protrusion). The EMG signals were directly integrated, and root mean squares of the AC components were computed. The selection of the signals to discard possible artefacts was performed by displaying EMG and RMS outputs on a six-channel UV oscillograph. The selected RMS values were submitted to different analyses of variance to define additive and non-additive models of effects. The results may be summarized as follows: The between-day sessions showed more variation than the within-day sessions. The variations related to the method accounted for a very high percentage of the total variance (48.9%). The recordings with needle electrodes displayed a large percentage of the individual variation (masseter, 31.2%; lateral pterygoid muscle, 65.9%) and significantly lower values for the variations related to the session or the side of recording. The one-side recordings were more suitable for distinguishing the biological variations than were the bilateral ones.(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
J Dent Resjournal_title
Journal of dental researchauthors
Dahan J,Boitte Cdoi
10.1177/00220345860650031401subject
Has Abstractpub_date
1986-03-01 00:00:00pages
441-7issue
3eissn
0022-0345issn
1544-0591journal_volume
65pub_type
杂志文章abstract：:A silver-plating technique was developed in an effort to produce good mechanical bonding characteristics between stainless steel pins and amalgam. Metallographic microscope and scanning electron microscope (SEM) studies were made to assess the presence, or otherwise, of such a bond between (a) the silver layer plating...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345800590020301
更新日期：1980-02-01 00:00:00
abstract：:Previous studies showed that residual compressive stresses induced by thermal tempering retarded the growth of surface cracks in bilayered porcelain disks. The objectives of the present study were: (1) to determine whether thermal tempering by air blasting reduces the length of cracks induced by microhardness indentat...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345960750020301
更新日期：1996-02-01 00:00:00
abstract：:Mesenchymal stem cells isolated from different dental tissues have been described to have osteogenic/odontogenic-like differentiation capacity, but little attention has been paid to the biochemical composition of the material that each produces. Here, we used Raman spectroscopy to analyze the mineralized materials pro...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034515599765
更新日期：2015-11-01 00:00:00
abstract：:Fibroblast growth factor (FGF) signaling has been implicated in the regulation of osteogenesis in both intramembranous and endochondral ossifications. In the developing palate, the anterior bony palate forms by direct differentiation of cranial neural crest (CNC)-derived mesenchymal cells, but the signals that regulat...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034517750141
更新日期：2018-05-01 00:00:00
abstract：:Previous studies have indicated that tooth-bleaching agents contain potentially hazardous chemicals. The present study evaluates the acute toxicity of a commercially available tooth-bleaching agent and carbamide peroxide, which is the active bleaching ingredient. Rats were dosed by stomach gavage, i.e., via a stomach ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345950740021401
更新日期：1995-02-01 00:00:00
abstract：:Lingual amylase and lingual lipase, two digestive enzymes that are secreted from lingual serous glands (von Ebner's), were simultaneously purified from rat lingual serous glands with hydrophobic chromatography used as the final step. This method, previously developed for the purification of lingual lipase, includes ho...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345890680020801
更新日期：1989-02-01 00:00:00
abstract：:Purinergic signaling is involved in pain generation and modulation in the nociceptive sensory nervous system. Adenosine triphosphate (ATP) induces pain via activation of ionotropic P2X receptors while adenosine mediates analgesia via activation of metabotropic P1 receptors. These purinergic signaling are determined by...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034517692953
更新日期：2017-06-01 00:00:00
abstract：:The importance of assessing the impact of treatments for chronic conditions on an individual's quality of life has been well-established. In this randomized clinical trial, oral-health-related quality of life, measured with the Oral Health Impact Profile (OHIP), was compared between two groups of edentulous patients. ...
journal_title：Journal of dental research
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1177/00220345000790090401
更新日期：2000-09-01 00:00:00
abstract：:The accelerating activity of N,N-substituted aminoethyl methacrylates on the curing of methyl methacrylate and composite resins with benzoyl peroxide is somewhat smaller than that of dimethyl-p-toluidine. Tesins cured with aminoethyl methacrylates containing a p-tolyl and 3,5-xylyl substituent on the nitrogen atom tur...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345750540041301
更新日期：1975-07-01 00:00:00
abstract：:Bone and dentin share similar biochemical compositions and physiological properties. Dentin, a major tooth component, is formed by odontoblasts; in contrast, bone is produced by osteoblasts. Osterix (Osx), a zinc finger-containing transcription factor, has been identified as an essential regulator of osteoblast differ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034514565647
更新日期：2015-03-01 00:00:00
abstract：:Dental implants have become an increasingly popular treatment choice for replacing missing teeth. Yet, little is known about the prevalence and sociodemographic distribution of dental implant use in the United States. To address this knowledge gap, we analyzed data from 7 National Health and Nutrition Examination Surv...
journal_title：Journal of dental research
pub_type： 历史文章,杂志文章
doi：10.1177/0022034518792567
更新日期：2018-12-01 00:00:00
abstract：:Adhesion of restorative and protective materials to dentin is an important requirement for operative and preventive dentistry. Wettability and roughness are dentin substrate conditions that are critical to establishing good adhesion. This study examined superficial and deep dentin for variations in water contact angle...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345990780091001
更新日期：1999-09-01 00:00:00
abstract：:A number of studies have been made investigating the properties of dental prosthodontic soft polymer materials. In such materials, which are used as short-term denture soft liners, the polymer component is complexed with one or more plasticizers. This lowers the glass transition temperature, Tg, of the polymer by allo...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345910700050201
更新日期：1991-05-01 00:00:00
abstract：:Focusing public insurance programs on interceptive orthodontics (IO) may increase access for low-income children. This report presents outcomes from a randomized clinical trial (RCT) comparing IO with comprehensive orthodontics (CO) in Medicaid patients. One hundred seventy pre-adolescents with Medicaid-eligible maloc...
journal_title：Journal of dental research
pub_type： 杂志文章,随机对照试验
doi：10.1177/0022034512448663
更新日期：2012-07-01 00:00:00
abstract：:Overgrowth of oral yeast is a common problem among the elderly. Probiotic bacteria are known to inhibit the growth of pathogenic microbes. We tested the hypothesis that cheese containing probiotic bacteria can reduce the prevalence of oral Candida. During this 16-week, randomized, double-blind, placebo-controlled stud...
journal_title：Journal of dental research
pub_type： 杂志文章,随机对照试验
doi：10.1177/154405910708600204
更新日期：2007-02-01 00:00:00
abstract：:Local administrations of prostaglandins E1 or E2 combined with orthodontic tooth movement can approximately double the rate of tooth movement in monkeys compared to that of the control. Macroscopically, no side-effect was observed in the gingiva and associated structures. ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345820610121401
更新日期：1982-12-01 00:00:00
abstract：:The relationship between occlusal stimuli and a hypofunctional periodontal ligament (PDL) structure has been reported, though changes in occlusal recovery conditions were still unclear. Nitric oxide (NO) produced by NO synthase (NOS) is considered a factor for vascular and immune system control, and it increases accor...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910408300413
更新日期：2004-04-01 00:00:00
abstract：:The effects of various additives on the setting of the glass-ionomer cement system was studied by means of cone and plate viscometry. The action of (+)-tartaric acid, the most important additive, on the setting reaction depended on its concentration. Low concentrations accelerated the development of viscosity of the c...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345880670120101
更新日期：1988-12-01 00:00:00
abstract：UNLABELLED:The aim of this cross-over, randomized, single-blinded trial was to examine whether intra-esophageal acidification induces sleep bruxism (SB). Polysomnography with electromyogram (EMG) of masseter muscle, audio-video recording, and esophageal pH monitoring were performed in a sleep laboratory. Twelve healthy...
journal_title：Journal of dental research
pub_type： 杂志文章,随机对照试验
doi：10.1177/0022034510393516
更新日期：2011-05-01 00:00:00
abstract：:The eventual outcome of dental caries is determined by the dynamic balance between pathological factors that lead to demineralization and protective factors that lead to remineralization. Pathological factors include acidogenic bacteria, inhibition of salivary function, and frequency of ingestion of fermentable carboh...
journal_title：Journal of dental research
pub_type： 杂志文章,评审
doi：10.1177/154405910408301s08
更新日期：2004-01-01 00:00:00
abstract：:Inorganic polyphosphate [Poly(P)] is especially prevalent in osteoblasts. We tested the hypothesis that Poly(P) stimulates osteoblastic differentiation and polyphosphate metabolism for bone formation. The osteoblast-like cell line, MC 3T3-E1, was cultured with Poly(P), and gene expression was evaluated by real-time re...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034510363096
更新日期：2010-05-01 00:00:00
abstract：:The effect of different doses of polyadenylic and polyuridylic acids (poly A:U) was studied in control rats and in rats exposed to hypoxia. In the control rats, administration of different doses of poly A:U did not change the thickness of the epiphyseal plate or increase the incorporation of 3H-phenylalanine as judged...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345760550041701
更新日期：1976-07-01 00:00:00
abstract：:One-step incomplete excavation seals caries-affected dentin under a restoration and appears to be advantageous in the treatment of deep lesions. However, it is impossible to discriminate radiographically between intentionally left, arrested lesions and overlooked or active lesions. This diagnostic uncertainty decrease...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034514531291
更新日期：2014-06-01 00:00:00
abstract：:Previous studies have shown that therapeutic pulsed ultrasound (pulsed) has superior stimulatory effect on bone fracture healing compared with continuous ultrasound (continuous). Our predictive hypothesis was that pulsed ultrasound can produce better bone formation during mandibular osteodistraction than continuous ul...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910808701018
更新日期：2008-10-01 00:00:00
abstract：:In this study, we analyzed the influence of prosthetic abutment height on marginal bone loss (MBL) around implants in the posterior maxilla. In this retrospective cohort study, the radiographically determined MBL was related to the height of the abutments of internal conical connection implants at 6 and 18 months post...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034513519800
更新日期：2014-07-01 00:00:00
abstract：:The purpose of this study was to investigate the mechanism of surface layer formation in artificial white spots. Two nondestructive nuclear micro-analysis techniques were employed to analyze windows of human dental enamel at progressive stages of an artificial lesion. Fluoride concentrations were measured to a depth o...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345830620091001
更新日期：1983-09-01 00:00:00
abstract：:This paper discusses loosely bound fluoride and its role in dental caries and prevention. Loosely bound fluoride (abbr. by Fa) is fluoride adsorbed onto enamel mineral crystallites. Several recent studies indicate that a high total level of fluoride in enamel does not guarantee protection against caries. This leads to...
journal_title：Journal of dental research
pub_type： 杂志文章,评审
doi：10.1177/00220345900690S118
更新日期：1990-02-01 00:00:00
abstract：:1) A new adhesive opaque resin containing a reactive monomer, 4-methacryloxy-ethyl trimellitate anhydride (4-META), was prepared, and its application to thermosetting acrylic resin veneer crowns was studied. 2) The 4-META opaque resin was applied to a variety of nickel-chromium dental alloy specimens which had undergo...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345810600091101
更新日期：1981-09-01 00:00:00
abstract：:Priming with tumor antigens is one of the most important strategies in cancer immunotherapy. To enhance tumor antigenicity, OK-432, a streptococcal preparation, was coupled to squamous cell carcinoma (KLN-205) by means of a 0.2% glutaraldehyde method. The purpose of this study was to investigate whether OK-432-conjuga...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910308200813
更新日期：2003-08-01 00:00:00
abstract：:Limited cure depth is a drawback of light-activated composites. We hypothesize that curing light transmission and cure depth are influenced by monomer reactivity and filler/resin refractive index mismatch. Light transmission throughout cure was recorded for composites based on strontium (refractive index 1.51) or bari...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910808700115
更新日期：2008-01-01 00:00:00
