Abstract:
:Camphorquinone (CQ) is widely used as a photo-initiator in dental materials; however, its cytotoxicity against human pulp fibroblasts (HPF) and particularly the effects of 2-dimethylaminoethyl methacrylate (DMA), a reducing agent and visible light (VL) irradiation on it remain unknown. So we investigated the cytotoxic and reactive oxygen species (ROS)-producing effects of CQ with or without DMA, in the presence or absence of VL on HPF cells. The free-radical production activity of CQ was measured by two different methods [using diphenylpicryl hydrazyl and galvinoxyl]. The phase-transition properties of dipalmitoylphosphatidyl choline (DPPC) liposomes, as a model for biomembranes, induced by CQ were investigated by differential scanning calorimetry. These findings were compared with those of 9-fluorenone (9F), an aromatic photo-initiator with long conjugated groups. Camphorquinone with VL irradiation increased the radical production, whereas 9F with VL irradiation increased ROS production, as well as effecting changes in the DPPC phase-transition properties. The cytotoxicity of CQ towards HPF cells was smaller than that of 9F despite greater radical production. The addition of DMA to the photosensitizer enhanced the free-radical production without increasing the ROS level or the cytotoxicity. Camphorquinone/DMA is a valuable combination for the polymerization of dental resins.
journal_name
J Oral Rehabiljournal_title
Journal of oral rehabilitationauthors
Atsumi T,Ishihara M,Kadoma Y,Tonosaki K,Fujisawa Sdoi
10.1111/j.1365-2842.2004.01357.xkeywords:
subject
Has Abstractpub_date
2004-12-01 00:00:00pages
1155-64issue
12eissn
0305-182Xissn
1365-2842pii
JOR1357journal_volume
31pub_type
杂志文章abstract::Nocturnal bite force during sleep associated bruxism was measured in 10 subjects. Hard acrylic dental appliances were fabricated for the upper and lower dentitions of each subject. Miniature strain-gauge transducers were mounted to the upper dental appliance at the right and left first molar regions. In addition, thin...
journal_title:Journal of oral rehabilitation
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abstract::The aims were to determine whether individuals with a past history of pain exhibit (i) altered jaw movement (e.g. reduced amplitude, increased jaw movement variability) in comparison with matched asymptomatic controls, and (ii) correlations between psychological measures (e.g. catastrophising) and altered jaw movement...
journal_title:Journal of oral rehabilitation
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abstract::It is considered that the information of chewed food, such as size and texture, is important for smooth mastication. In this study, we analysed aspects of the control of occlusal force, by experimentally reproducing situations in which the hardness of food changed unpredictably during mastication, using a device that ...
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journal_title:Journal of oral rehabilitation
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更新日期:2015-09-01 00:00:00
abstract::The short-term effect (3-6 weeks) of the use of a stabilization splint was investigated in a group of 35 myogenous craniomandibular disorder patients. The patients were clinically examined and surface EMG recordings of the temporal and masseter muscles were made during clenching in the intercuspal position (ICP), imme...
journal_title:Journal of oral rehabilitation
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abstract::This in vitro study compared marginal gap formation in class II resin composite restorations. Forty caries-free extracted molars were prepared in a standardized manner for class II restoration by one of four methods: bulk- or incrementally-placed light-activated resin composite (Amelogen), and bulk- or incrementally-p...
journal_title:Journal of oral rehabilitation
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doi:10.1046/j.1365-2842.2003.01082.x
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abstract::Previous studies support the view that the oral medium is a dynamic system composed of several elements, among which are restorations in teeth. The author believes that the evolution in time of a restoration can be non-lineal and that it has an irregular and chaotic behaviour. To investigate the theory, the author stu...
journal_title:Journal of oral rehabilitation
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doi:10.1046/j.1365-2842.1997.00457.x
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journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1046/j.1365-2842.1998.00327.x
更新日期:1998-11-01 00:00:00
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journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1046/j.1365-2842.1999.00407.x
更新日期:1999-06-01 00:00:00
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journal_title:Journal of oral rehabilitation
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journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/j.1365-2842.1976.tb00955.x
更新日期:1976-07-01 00:00:00
abstract::The aim of this study was to examine whether sectioning of the lateral branches of the hypoglossal nerves (l-XII) in young male rats affects regulation of body weight, food intake and water intake in their period of growth by using a linear fixed effects model or not. Three groups of the rats were prepared according t...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/j.1365-2842.2009.01986.x
更新日期:2009-09-01 00:00:00
abstract::The bases of occlusal rims and trial dentures should fit both the cast and the mouth accurately. The retention of shape and dimension of strips and sheets of grey and pink shellac, filled cold cure acrylic resin and wax were tested following moulding over stylised upper edentulous casts. The thermoplastic materials we...
journal_title:Journal of oral rehabilitation
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journal_title:Journal of oral rehabilitation
pub_type: 杂志文章,评审
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更新日期:2017-12-01 00:00:00
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journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
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更新日期:1986-11-01 00:00:00
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journal_title:Journal of oral rehabilitation
pub_type: 临床试验,杂志文章
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更新日期:1994-07-01 00:00:00
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journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/joor.13122
更新日期:2020-10-31 00:00:00
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journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/joor.12711
更新日期:2018-12-01 00:00:00
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journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/j.1365-2842.1991.tb00069.x
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abstract::Ion exchange has been shown to increase the fracture strength of not only industrial glasses but also dental porcelains. Tuf-Coat, an ion exchange material, has been introduced as a simple method to strengthen dental porcelain restorations. Our experimental investigation aims to evaluate the effect of the ion exchange...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/j.1365-2842.2004.01367.x
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journal_title:Journal of oral rehabilitation
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journal_title:Journal of oral rehabilitation
pub_type: 杂志文章,评审
doi:10.1111/j.1365-2842.1995.tb00216.x
更新日期:1995-10-01 00:00:00
abstract::Implant treatment in individuals with periodontitis-associated tooth loss is frequently debated. The objective of the present systematic review was to assess the principles and outcome of implant treatment in periodontitis-susceptible patients. Studies considered for inclusion were searched in MEDLINE (PubMed) and rel...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章,meta分析,评审
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更新日期:2008-01-01 00:00:00
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journal_title:Journal of oral rehabilitation
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更新日期:2011-06-01 00:00:00
abstract::The purpose of this study was to evaluate the surface micromorphology of resin modified glass-ionomer cements and flowable compomers. In the study two resin modified glass-ionomers and two flowable compomers were used to prepare standardized 20 cylinderic samples. Samples were divided into four groups. Surface treatme...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/j.1365-2842.2005.01484.x
更新日期:2005-09-01 00:00:00
abstract::This study investigated the subjective symptoms of craniomandibular disorder and the restriction in maximal mandibular opening of 891 elderly Singaporean citizens. A distribution of 22% of subjects (20% of the women and 26% of the men) reported subjective symptoms of craniomandibular disorders. The most common single ...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/j.1365-2842.1995.tb00794.x
更新日期:1995-06-01 00:00:00
abstract::The aim of the present study was to evaluate two different methods for the assessment of the positional stability of occlusion. The time taken from first contact on closure to full intercuspation was measured by the T-scan(R), and the length of the slide between centric relation (CR) and maximum intercuspation was cli...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1046/j.1365-2842.1999.00483.x
更新日期:1999-10-01 00:00:00
abstract::A total of 30 denture-wearing patients with burning mouth syndrome (BMS) referred to a Pain Clinic Unit and 26 age- and sex-matched control subjects were examined and compared with respect to general health factors and denture function. The study demonstrated a significantly higher frequency of multiple chronic diseas...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/j.1365-2842.1995.tb00237.x
更新日期:1995-12-01 00:00:00
abstract::The occurrence of symptoms of dysfunction of the masticatory system was studied in 253 Swedish men from the region of Stockholm with an average age of 19 years. Besides inquiry by questionnaire regarding subjective symptoms a clinical functional examination of the masticatory apparatus was performed. Fourteen per cent...
journal_title:Journal of oral rehabilitation
pub_type: 杂志文章
doi:10.1111/j.1365-2842.1976.tb00925.x
更新日期:1976-01-01 00:00:00