Abstract：
AIM:To estimate the quantity of dental amalgam that Ontario dentists release into waste water. METHODS:Information from a self-administered postal survey of Ontario dentists was combined with the results of other experiments on the weight of amalgam restorations and the quantity of amalgam waste that bypasses solids separators in dental offices. Algorithms were developed to compute the quantity of amalgam waste leaving dental offices when dentists used or did not use ISO 11143 amalgam particle separators. RESULTS:A total of 878 (44.0%) of 1,994 sampled dentists responded to the survey. It was estimated that Ontario dentists removed 1,880.32 kg of amalgam (940.16 kg of mercury) during 2002, of which 1,128.19 kg of amalgam (564.10 kg of mercury) would have been released into waste water in Ontario if no dentists had been using a separator. Approximately 22% of the dentists reported using amalgam particle separators. On the basis of current use of amalgam separators, it was estimated that 861.78 kg of amalgam (430.89 kg of mercury or 170.72 mg per dentist daily) was released in 2002. The use of amalgam separators by all dentists could reduce the quantity of amalgam (and mercury) entering waste water to an estimated 12.41 kg (6.21 kg of mercury, or 2.46 mg per dentist per day). CONCLUSION:Amalgam particles separators can dramatically reduce amalgam and mercury loading in waste water released from dental offices.
journal_name
J Can Dent Assocjournal_title
Journal (Canadian Dental Association)authors
Adegbembo AO,Watson PAkeywords:
subject
Has Abstractpub_date
2004-12-01 00:00:00pages
759, 759a-759fissue
11eissn
0709-8936issn
1488-2159journal_volume
70pub_type
杂志文章abstract：:Because of the ever-increasing enthusiasm that new graduates have demonstrated for practising minor oral surgery procedures, the authors believed that it would be useful to translate the results of a research project done in 1990 by Drs. David S. Precious and Paul Mercier, who are well-known oral and maxillofacial sur...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章,评审
doi：
更新日期：1992-09-01 00:00:00
abstract：:Five scavenging systems were installed in 10 dental office and the levels of nitrous oxide were closely monitored for each. While the readings were higher than the previous non-clinical study, all appeared to be reasonably efficient. The various factors which caused increases in background levels were also recorded in...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章
doi：
更新日期：1989-07-01 00:00:00
abstract：:A study on the effectiveness of a fluoride mouthrinse program was conducted over a 20-month period among 610 children attending grade 5 in two unfluoridated communities. The results showed that the preventive agent had no significant cariostatic effect. Participation and compliance problems were investigated as possib...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章
doi：
更新日期：1990-01-01 00:00:00
abstract：:Given the infectious nature of most periodontal diseases and the limited results that are sometimes achieved with conventional mechanical therapies, the use of antibiotics is warranted in certain cases. However, systemic antibiotic therapy is associated with certain risks, notably the development of antibiotic resista...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章
doi：
更新日期：2007-10-01 00:00:00
abstract：:The World Health Organization (WHO), the International Committee for Thrombosis and Hemostasis, and the International Committee for Standardization in Hematology, have strongly suggested that INR (International Normalized Ratio) values should be used to report a patient's level of coagulation. This paper discusses the...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章
doi：
更新日期：1996-05-01 00:00:00
abstract：OBJECTIVE:Recently, there has been great interest in the use, abuse and over-prescribing of opioid analgesics for children. However, there is a paucity of evidence on patterns of prescribing of both narcotic and non-narcotic analgesics for children by dentists. METHODS:We used a population-wide prescription drug datab...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章
doi：
更新日期：2017-08-01 00:00:00
abstract：:The objective of this study was to compare unstimulated salivary flow rate and residual salivary volume (the volume of saliva retained in the mouth after swallowing) in a group of 23 control subjects and a group of 25 patients who had received radiation treatment or had undergone removal of the salivary glands (or bot...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章
doi：
更新日期：2004-06-01 00:00:00
abstract：OBJECTIVE:To gain a better understanding of the extent to which rectangular collimation is being used in private practice and the barriers to adoption by practitioners. METHODS:Licensed dentists in private practice were asked to answer a survey composed of 17 multiple-choice questions and 1 open-ended question regardi...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章
doi：
更新日期：2020-10-01 00:00:00
abstract：PURPOSE:In this 10-year longitudinal study we evaluated the amount of mandibular residual ridge resorption for 2 groups of subjects with complete dentures, one group with porcelain artificial teeth and the other with acrylic resin teeth. METHODS:One hundred and nine patients who had undergone ridge extension procedure...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章
doi：
更新日期：2002-06-01 00:00:00
abstract：:The resistance of bacteria, fungi and viruses to antimicrobials is increasing rapidly, with deleterious consequences. Dentistry's role in this development is unclear, because the necessary information has not yet been collected. Nevertheless, dentists should recognize that it is essential to use antimicrobials in an a...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章,评审
doi：
更新日期：1998-07-01 00:00:00
abstract：:The panoramic and intraoral radiographs of 154 elderly dental patients aged 65 years and older were assessed at the College of Dentistry, University of Saskatchewan, Saskatoon. Thirty-seven per cent of the patients were completely edentulous, and 61% were partially edentulous. In the dentate group, 87% had evidence of...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章
doi：
更新日期：1991-05-01 00:00:00
abstract：:The caries rates of six-year-old Manitoba children from a non-fluoridated Northern community were compared with those of a representative group of southern Manitoba children from non-fluoridated areas. All of the surveyed children became eligible for dental treatment coverage under Manitoba Health's Children's Dental ...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章
doi：
更新日期：1993-06-01 00:00:00
abstract：:Over the past 4 years, numerous cases of osteonecrosis of the jaw in patients treated with bisphosphonates have been reported. Since 1998, children and adolescents with osteogenesis imperfecta have received bisphosphonates to increase their bone density and reduce the incidence of bone fractures. The results have been...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章
doi：
更新日期：2008-07-01 00:00:00
abstract：OBJECTIVE:To perform a systematic literature review and meta-analysis on the effectiveness of interventions used in the emergency management of acute apical periodontitis in the permanent dentition. METHODS:Electronic databases were searched from their inception to 2001. These searches, combined with manual searching,...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章,meta分析,评审
doi：
更新日期：2003-03-01 00:00:00
abstract：:Xerostomia (dry mouth) is an unpleasant condition that is common after radiotherapy to the head and neck, although it may have other causes. A review of the management of xerostomia, as well as the prevention and management of the oral soft tissue and dental complications resulting from xerostomia, is provided. ...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章,评审
doi：
更新日期：1992-02-01 00:00:00
abstract：:Most supernumerary teeth are located in the anterior maxillary region. They are classified according to their form and location. Their presence may give rise to a variety of clinical problems. Detection of supernumerary teeth is best achieved by thorough clinical and radiographic examination. Their management should f...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章,评审
doi：
更新日期：1999-12-01 00:00:00
abstract：:Dentistry and society have long recognized the benefits of using silver-based amalgams to restore and maintain the dental health of patients. However, recent studies by health and environment experts have shown that mercury is of great concern when it enters the biosphere as a contaminant. A rational approach to pollu...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章
doi：
更新日期：2001-05-01 00:00:00
abstract：:The microflora associated with odontogenic infections are typically mixed and of indigenous origin. Streptococcus, peptostreptococcus, peptococcus, fusobacterium, bacteroides, and actinomyces species are the principle microflora isolated from these infections. Penicillin V (phenoxymethyl penicillin) remains the antimi...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章,评审
doi：
更新日期：1993-03-01 00:00:00
abstract：:This study will introduce a new method for measuring the working time of elastomeric impression materials, taking into account the perceived shortcomings of existing systems for evaluating these times. The working times of various commercially available polysulfide, addition reaction silicones and polyethers were dete...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章
doi：
更新日期：1994-01-01 00:00:00
abstract：:This is the third in a series of 5 articles providing a contemporary overview and introduction to unconventional dentistry (UD) and its correlation to unconventional medicine (UM). UD presents issues of dental quackery, fraud and malpractice, and it also engenders professional concerns about public protection and prof...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章
doi：
更新日期：2000-10-01 00:00:00
abstract：:Various definitions, classifications and theories been ascribed to bruxism. Knowledge gained through expanding research initiatives have transformed some of the concepts that were once held as truths. Sleep bruxism is no longer considered a parasomnia nor is its etiology believed to be based on purely mechanical facto...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章,评审
doi：
更新日期：2015-01-01 00:00:00
abstract：OBJECTIVE:This study was undertaken to characterize 9 currently available proprietary flowable composites with respect to key properties of flow, flexural strength, stiffness (modulus of elasticity) and radiopacity. METHODS:Seven proprietary flowable composites (Aelite Flo, Filtek Flow, Heliomolar Flow, PermaFlo, Revo...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章
doi：
更新日期：2003-09-01 00:00:00
abstract：:While teaching and clinical care may be somewhat intuitive, research is much less so, and a lack of research experience or opportunity to do research can be frustrating to the faculty member who is trying to become well-rounded. In an effort to ease the transition from clinical teacher to clinical researcher, the facu...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章
doi：
更新日期：2007-04-01 00:00:00
abstract：:Ankylosis is a known complication of replanted or severely intruded permanent incisors and can be diagnosed by the characteristic sound emitted when the tooth is tapped. The ankylosed incisor demonstrates a lack of physiologic mobility and, later, radiographic evidence of replacement resorption. If the patient is pre-...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章
doi：
更新日期：2005-11-01 00:00:00
abstract：:N-butyl cyanoacrylate is an effective tissue adhesive which is hemostatic and bacteriostatic. It can be considered an alternative to conventional sutures in soft-tissue surgery. The author presents two cases demonstrating the use of the material. Case One shows its use in free gingival graft surgery. Case Two shows it...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章
doi：
更新日期：1998-10-01 00:00:00
abstract：:Despite the progress made in the field of pulp biology, the technique and philosophy of direct vital pulp capping remains a controversial subject. Clinicians are well aware of the immediate and long-term success rates after root canal therapy, but are less certain of the success of vital pulp capping. Researchers have...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章,评审
doi：
更新日期：1999-06-01 00:00:00
abstract：BACKGROUND AND AIM:Finite element analysis (FEA) was used to generate 3-dimensional models of a human mandible with impacted third molars. The aim was to analyze the effects of removing various amounts of bone around an impacted mandibular third molar and to predict the possibility of iatrogenic fracture. MATERIALS AN...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章
doi：
更新日期：2010-01-01 00:00:00
abstract：:Management of tooth avulsion in the permanent dentition often presents a challenge. Definitive treatment planning and consultation with specialists is seldom possible at the time of emergency treatment. Replantation of the avulsed tooth can restore esthetic appearance and occlusal function shortly after the injury. Th...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章
doi：
更新日期：2002-05-01 00:00:00
abstract：:Some of the reasons for my belief that CVT has been marketed prematurely have been described. They include the belief that the only really important outcome from the patients' and dentists' perspectives is proven reductions in dental caries. Associated with this is the need to recognize that, using such a criterion, t...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章
doi：
更新日期：1994-08-01 00:00:00
abstract：:Because of the dental profession's increased utilization of light-cured restorative materials, there has been a corresponding increase in research into the light sources used to initiate polymerization. The argon laser is one promising source, as the wavelength of light emitted by this laser is optimal for the initiat...
journal_title：Journal (Canadian Dental Association)
pub_type： 杂志文章,评审
doi：
更新日期：1999-09-01 00:00:00
