Optimizing the procedure for mercury recovery from dental amalgam.

Abstract:

:Mercury, as any other heavy metal, may cause environmental damages due to its accumulation and biotransformation. Dental offices, whether private or institutional, use dental amalgam as a restorative material on a daily basis. Dental amalgam is composed of mercury (50%), silver (30%) and other metals. Approximately 30% of the amalgam prepared in dental offices (0.6 g per capsule) are wasted and inadequately discarded without any treatment. Methods for mercury recovery have been proposed previously, using high temperatures through exposure to direct flame (650 degrees C), long processing time, and hazardous reagents as potassium cyanide. The purpose of this study was to develop a method to replace the direct flame by an electrical mantle in the process of mercury recovery. Results showed an average mercury recovery of 90% from 2 kg of amalgam after 30 minutes of processing time, thus optimizing the procedure. The proposed modifications allowed a significant reduction in processing time and a mercury recovery with high purity. The modified process also provided minimization of operator exposure to physical, chemical and ergonomic hazards, representing a technological advance compared to the risks inherent to the original method. It also provided environmental health and economy of energy resources by replacing a finite energy source (fossil and organic) by a more environmentally appropriate electric source, resulting in significant improvement of the procedure for mercury recovery from dental amalgam.

journal_name

Braz Oral Res

journal_title

Brazilian oral research

authors

Iano FG,Santos Sobrinho Od,Silva TL,Pereira MA,Figueiredo PJ,Alberguini LB,Granjeiro JM

doi

10.1590/s1806-83242008000200005

subject

Has Abstract

pub_date

2008-04-01 00:00:00

pages

119-24

issue

2

eissn

1806-8324

issn

1807-3107

pii

S1806-83242008000200005

journal_volume

22

pub_type

杂志文章
  • How to improve root canal filling in teeth subjected to radiation therapy for cancer.

    abstract::The aim of this study was to evaluate the influence of radiation therapy on root canal sealer push-out bond strength (BS) to dentin and the sealer/dentin interface after different final irrigation solutions (NaOCl, EDTA, and chitosan). Sixty-four maxillary canines were distributed into two groups (n=30): non-irradiate...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/1807-3107bor-2018.vol32.0121

    authors: Paiola FG,Lopes FC,Mazzi-Chaves JF,Pereira RD,Oliveira HF,Queiroz AM,Sousa-Neto MD

    更新日期:2018-11-29 00:00:00

  • Surface roughness and wear of resin cements after toothbrush abrasion.

    abstract::Increased surface roughness and wear of resin cements may cause failure of indirect restorations. The aim of this study was to evaluate quantitatively the surface roughness change and the vertical wear of four resin cements subjected to mechanical toothbrushing abrasion. Ten rectangular specimens (15 × 5 × 4 mm) were ...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/1807-3107bor-2015.vol29.0011

    authors: Ishikiriama SK,Ordoñéz-Aguilera JF,Maenosono RM,Volú FL,Mondelli RF

    更新日期:2015-01-01 00:00:00

  • Push-out bond strength of different tricalcium silicate-based filling materials to root dentin.

    abstract::The aim of this study was to evaluate the bond strength of different triccalcium silicate cements to retrograde cavity using a push out test. Thirty maxillary central incisors were shaped using #80 hand files and sectioned transversally. Root slices were obtained from the apical 4 mm after eliminating the apical extre...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/1807-3107bor-2018.vol32.0018

    authors: Stefaneli Marques JH,Silva-Sousa YTC,Rached-Júnior FJA,Macedo LMD,Mazzi-Chaves JF,Camilleri J,Sousa-Neto MD

    更新日期:2018-03-08 00:00:00

  • Dental pain, use of dental services and oral health-related quality of life in southern Brazil.

    abstract::This study aimed at assessing the relationship between dental pain and the reason for using dental services and oral health quality of life in people aged 50 to 74 years in southern Brazil. A cross-sectional population-based study was conducted with 720 individuals aged 50 to 74 years, living in three health districts...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/1807-3107BOR-2016.vol30.0039

    authors: Cavalheiro CH,Abegg C,Fontanive VN,Davoglio RS

    更新日期:2016-08-18 00:00:00

  • Radiographic inspection of porosity in Ti-6Al-4V laser-welded joints.

    abstract::Widely used in dentistry, Ti-6Al-4V alloy is difficult to cast and solder, as it frequently exhibits pores inside the structure. This study was conducted to evaluate the effect of joint openings and diameters of laser-welded joints executed in Ti-6Al-4V structures on the presence of pores as checked by radiographic pr...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/s1806-83242011005000005

    authors: Nuñez-Pantoja JM,Takahashi JM,Nóbilo MA,Consani RL,Mesquita MF

    更新日期:2011-03-01 00:00:00

  • Administrative and clinical denials by a large dental insurance provider.

    abstract::The objective of this study was to assess the prevalence and the type of claim denials (administrative, clinical or both) made by a large dental insurance plan. This was a cross-sectional, observational study, which retrospectively collected data from the claims and denial reports of a dental insurance company. The sa...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/1807-3107BOR-2015.vol29.0041

    authors: Miranda GE,Siqueira MC,Ferreira RL,Delwing F,Daruge Júnior E

    更新日期:2015-01-01 00:00:00

  • Influence of crosshead speed on failure load and failure mode of restored maxillary premolars.

    abstract::We analyzed the effect of the crosshead speed of an applied load on failure load and failure mode of restored human premolars. Fifty intact, noncarious human premolars were selected. Class II mesio-occlusodistal preparations were made with a water-cooled high-speed preparation machine, and the teeth were restored with...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/1807-3107BOR-2016.vol30.0003

    authors: Naves LZ,Silva GR,Correr-Sobrinho L,Costa AR,Valdivia AD,Soares CJ

    更新日期:2016-01-01 00:00:00

  • Malocclusion and dental appearance in underprivileged Brazilian adolescents.

    abstract::Satisfaction with dental aesthetics is a subjective indicator used in epidemiological studies and is related to health behaviours. Little is known about the factors that influence this indicator, particularly among adolescents who live in a situation of social vulnerability. The aim of this study was to investigate th...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/1807-3107bor-2019.vol33.0014

    authors: Kaieda AK,Bulgareli JV,Cunha IPD,Vedovello SAS,Guerra LM,Ambrosano GMB,Pereira AC,Paranhos LR,Cortellazzi KL

    更新日期:2019-03-18 00:00:00

  • Flexural strength and modulus of elasticity of different types of resin-based composites.

    abstract::The aim of the study was to test whether the filler composition of resin composites influences their flexural strength and modulus of elasticity. Flexural strength and modulus of elasticity were obtained through a three-point bending test. Twelve bar shaped specimens of 5 commercially available composites--Supreme (3M...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/s1806-83242007000100003

    authors: Rodrigues Junior SA,Zanchi CH,Carvalho RV,Demarco FF

    更新日期:2007-01-01 00:00:00

  • HPV in oral squamous cell carcinomas of a Brazilian population: amplification by PCR.

    abstract::Human Papilomaviruses (HPV) are a group of viruses associated with benign and malignant lesions of cutaneous and mucosal epithelia. Some "high risk" HPV types, especially HPV 16 and 18, are strongly correlated with cervical and anogenital cancers and are also related to the genesis of oral squamous cell carcinomas (OS...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/s1806-83242006000100005

    authors: Rivero ER,Nunes FD

    更新日期:2006-01-01 00:00:00

  • Predicting intraoperative pain in emergency endodontic patients: clinical study.

    abstract::This prospective observational study sought to investigate the incidence of intraoperative pain (IOP) among emergency endodontic patients and to construct an IOP prediction model that includes preoperative pain level (PPL). All patients who underwent emergency endodontic treatment at Gazi University, Ankara, Turkey, d...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/1807-3107bor-2018.vol32.0038

    authors: Yücel O,Ekici MA,Ilk O,Ilhan MN,Kayaoglu G

    更新日期:2018-08-06 00:00:00

  • Evaluation of alternative methods for the disinfection of toothbrushes.

    abstract::The aim of this study was to evaluate alternative methods for the disinfection of toothbrushes considering that most of the previously proposed methods are expensive and cannot be easily implemented. Two-hundred toothbrushes with standardized dimensions and bristles were included in the study. The toothbrushes were di...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/s1806-83242010000100005

    authors: Komiyama EY,Back-Brito GN,Balducci I,Koga-Ito CY

    更新日期:2010-01-01 00:00:00

  • Effects of temporal muscle detachment and coronoidotomy on facial growth in young rats.

    abstract::This study analyzed the effects of unilateral detachment of the temporal muscle and coronoidotomy on facial growth in young rats. Thirty one-month-old Wistar rats were distributed into three groups: detachment, coronoidotomy and sham-operated. Under general anesthesia, unilateral detachment of the temporal muscle was ...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/s1806-83242012000400011

    authors: Gomes FE,Moraes RB,Luz JG

    更新日期:2012-07-01 00:00:00

  • Effect of CPP-ACP on remineralization of artificial caries-like lesion: an in situ study.

    abstract::The purpose of this double-blind, randomized, crossover in situ study is to compare remineralization of preformed enamel lesions by casein phosphopeptide-stabilized amorphous calcium phosphate (CPP-ACP) and fluoride dentifrice products. During each of four 10-day experimental legs, 10 participants wore intraoral remov...

    journal_title:Brazilian oral research

    pub_type: 杂志文章,随机对照试验

    doi:10.1590/1807-3107bor-2020.vol34.0061

    authors: Oliveira PRA,Barboza CM,Barreto LSDC,Tostes MA

    更新日期:2020-06-24 00:00:00

  • Evaluation of the risk of a stripping perforation with Gates-Glidden drills: serial versus crown-down sequences.

    abstract::The aim of this study was to evaluate the remaining dentine/cementum thickness using Gates-Glidden burs in serial and crown-down sequences and to observe which of the two sequences is the safest for preparing mesial roots of molars. Thirty-six left and right human mandibular first molars were selected. Standard access...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/s1806-83242008000100004

    authors: Coutinho-Filho T,De-Deus G,Gurgel-Filho ED,Rocha-Lima AC,Dias KR,Barbosa CA

    更新日期:2008-01-01 00:00:00

  • Clinical and biochemical evaluation of the saliva of patients with xerostomia induced by radiotherapy.

    abstract::Clinical aspects and biochemical properties in the saliva of 21 patients prior to and following radiotherapy for head and neck cancer were evaluated (experimental group) and compared with the same properties in a control group of 21 subjects free of cancer. Salivary flow was evaluated by measuring the time necessary, ...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/s1806-83242004000100013

    authors: de Barros Pontes C,Polizello AC,Spadaro AC

    更新日期:2004-01-01 00:00:00

  • Immunohistochemical analysis of FoxP3+ regulatory T cells in lower lip squamous cell carcinomas.

    abstract::The aim of this study was to determine the number of FoxP3+ regulatory T (Treg) cells in the microenvironment of lower lip squamous cell carcinomas (LLSCCs) and to correlate the findings with clinicopathological parameters (tumor size/extent, regional lymph node metastasis, clinical stage, and histopathological grade ...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/1807-3107BOR-2016.vol30.0130

    authors: da Cunha FA Filho,Aguiar MC,Souza LB,Pinto LP,Godoy GP,Alves PM,Nonaka CF

    更新日期:2016-12-22 00:00:00

  • Effect of cleanser solutions on the color of acrylic resins associated with titanium and nickel-chromium alloys.

    abstract::This study evaluated the effect of cleanser solutions on the color of heat-polymerized acrylic resin (HPAR) and on the brightness of dental alloys with 180 immersion trials. Disk-shaped specimens were made with I) commercially pure titanium, II) nickel-chromium-molybdenum-titanium, III) nickel-chromium molybdenum, and...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/1807-3107bor-2014.vol28.0017

    authors: Freitas Oliveira Paranhos Hd,Bezzon OL,Davi LR,Felipucci DN,Silva CH,Pagnano VO

    更新日期:2014-01-01 00:00:00

  • Tensile bond strength of self-etching versus total-etching adhesive systems under different dentinal substrate conditions.

    abstract::The use of acid etchants to produce surface demineralization and collagen network exposure, allowing adhesive monomers interdiffusion and consequently the formation of a hybrid layer, has been considered the most efficient mechanism of dentin bonding. The aim of this study was to compare the tensile bond strength to d...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/s1806-83242007000100014

    authors: Susin AH,Vasconcellos WA,Saad JR,Oliveira Junior OB

    更新日期:2007-01-01 00:00:00

  • Experimental furcal perforation treated with mineral trioxide aggregate plus selenium: immune response.

    abstract::The aim of this study is to evaluate the expression of cytokines in response to mineral trioxide aggregate (MTA) plus selenium in germ-free mice with experimental furcal perforation. The first left maxillary molar was opened, and the furcal area was perforated and treated with post-MTA-Se (experimental group). The sam...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/1807-3107bor-2018.vol32.0103

    authors: Espaladori MC,Maciel KF,Brito LCN,Kawai T,Vieira LQ,Ribeiro Sobrinho AP

    更新日期:2018-10-11 00:00:00

  • Low-intensity laser phototherapy enhances the proliferation of dental pulp stem cells under nutritional deficiency.

    abstract::Dental trauma in immature permanent teeth can damage pulp vascularization, which leads to necrosis and cessation of apexogenesis. Studies on tissue engineering using stem cells from human exfoliated deciduous teeth (SHEDs) have yielded promising results. Laser phototherapy (LPT) is able to influence the proliferation ...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/1807-3107BOR-2016.vol30.0080

    authors: Moura-Netto C,Ferreira LS,Maranduba CM,Mello-Moura ACV,Marques MM

    更新日期:2016-05-31 00:00:00

  • Erratum: Health-related quality of life of patients with squamous cell carcinoma: a comparison according to tumor location. Braz Oral Res. 2017;31:e105.

    abstract::[This corrects the article doi: 10.1590/1807-3107BOR-2017.vol31.0105]. ...

    journal_title:Brazilian oral research

    pub_type: 杂志文章,已发布勘误

    doi:10.1590/1807-3107BOR-2017.vol31.0105erratum

    authors:

    更新日期:2018-02-01 00:00:00

  • Effect of root canal filling techniques on the bond strength of epoxy resin-based sealers.

    abstract::The aim of this study was to evaluate the effects of different root canal filling techniques on the bond strength of epoxy resin-based sealers. Sixty single-rooted canines were prepared using ProTaper (F5) and divided into the following groups based on the root filling technique: Lateral Compaction (LC), Single Cone (...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/1807-3107BOR-2016.vol30.0024

    authors: Rached-Júnior FJ,Souza AM,Macedo LM,Raucci-Neto W,Baratto-Filho F,Silva BM,Silva-Sousa YT

    更新日期:2016-01-01 00:00:00

  • Occlusal caries diagnosis in permanent teeth: an in vitro study.

    abstract::The reduction in caries prevalence has not occurred uniformly for all dental surfaces. As the occlusal surfaces are still the most likely sites for the development of lesions, new methods of diagnosis are still being evaluated. This study compared a laser fluorescence (LF) system (DIAGNOdent) with the Ekstrands visual...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/s1806-83242005000400002

    authors: Angnes G,Angnes V,Grande RH,Battistella M,Loguercio AD,Reis A

    更新日期:2005-10-01 00:00:00

  • Effect of grape seed extract (GSE) on functional activity and mineralization of OD-21 and MDPC-23 cell lines.

    abstract::Recent studies on functional tissue regeneration have focused on substances that favor cell proliferation and differentiation, including the bioactive phenolic compounds present in grape seed extract (GSE). The aim of this investigation was to evaluate the stimulatory potential of GSE in the functional activity of und...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/1807-3107bor-2019.vol33.0013

    authors: Coelho MC,Sanchez PKV,Fernandes RR,Souza FPP,Siéssere S,Bombonato-Prado KF

    更新日期:2019-02-11 00:00:00

  • Analysis of 153 cases of odontogenic cysts in a South Indian sample population: a retrospective study over a decade.

    abstract::The purpose of this study was to determine the prevalence of odontogenic cysts and to identify their clinico-pathological features among patients by studying biopsy specimens obtained from the archives of the Department of Oral and Maxillofacial Pathology, College of Dental Sciences, Davangere, Karnataka, India, durin...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/s1806-83242012005000007

    authors: Selvamani M,Donoghue M,Basandi PS

    更新日期:2012-07-01 00:00:00

  • Morphology of the dentin on primary molars after the application of phosphoric acid under different conditions.

    abstract::The aim of this study was to evaluate changes in the superficial dentin pattern of primary teeth after applying different phosphoric acid concentrations and conditioning times. Twenty-four dentin surfaces were divided in 4 groups with 10 teeth each: GI -no treatment; GII to GIV -phosphoric acid at 37%, 32%, and 10% re...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/s1806-83242010000300011

    authors: Pimenta RA,Penido CV,Cruz Rde A,Alves JB

    更新日期:2010-07-01 00:00:00

  • Comparison among dental, skeletal and chronological development in HIV-positive children: a radiographic study.

    abstract::The goal of this study was to evaluate skeletal, dental and chronological development in an HIV-positive group of children, as compared with a control group, during a four-year period. Panoramic radiographs and hand and wrist radiographs of 60 children were taken. The children, of both sexes, aged 5 years and 2 months...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/s1806-83242005000300010

    authors: Holderbaum RM,Veeck EB,Oliveira HW,Silva CL,Fernandes A

    更新日期:2005-07-01 00:00:00

  • Micro-CT evaluation of the radioprotective effect of resveratrol on the mandibular incisors of irradiated rats.

    abstract::The purpose of this study was to perform a microcomputed tomographic evaluation of the radioprotective effect of resveratrol on the volume of mandibular incisors of irradiated rats. A second aim was to make a quantitative assessment of the effect of x-ray exposure on these dental tissues. Twenty adult male rats were d...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/1807-3107BOR-2016.vol30.0168

    authors: Barbosa GL,Pimenta LA,Almeida SM

    更新日期:2016-01-01 00:00:00

  • Analysis of enamel and material wear by digital microscope: an in-vitro study.

    abstract::The objective of the study was to analyze the surface area (SA) of the wear caused by simulated chewing on human enamel and opposing restorative material, namely: composite resin (CR), porcelain fused to metal (PFM), lithium disilicate (LD), or monolithic zirconia (MZr). Forty-eight premolars were selected as enamel s...

    journal_title:Brazilian oral research

    pub_type: 杂志文章

    doi:10.1590/1807-3107bor-2019.vol33.0121

    authors: Habib SR,Ansari AS,Alqahtani M,Alshiddi IF,Alqahtani AS,Hassan SH

    更新日期:2020-01-10 00:00:00