Abstract:
:The objective of the present study was to assess the effectiveness of reciprocating instrumentation in disinfecting oval-shaped root canals infected with Enterococcus faecalis. Forty-five human lower premolars were infected with a culture of E. faecalis (ATCC 29212) for 28 days. Five other teeth that were neither contaminated nor instrumented were used as controls. The 45 specimens were divided into three experimental groups (n = 15) based on the root canal preparation technique used: manual (K-type, Dentsply Maillefer, Ballaigues, Switzerland); rotary (MTwo, VDW GmbH, Munich, Germany); and reciprocating (Reciproc R50, VDW GmbH, Munich, Germany) instruments. During chemomechanical preparation, 21 mL of 2.5% NaOCl was used as the irrigating solution. Microbiological sampling was performed before (S1) and immediately after (S2) the chemomechanical preparation using sterilized paper points. Specimens were then cleaved, and 0.02 g of dentine chips was collected from the root thirds to verify the presence of microorganisms in dentinal tubules. All three preparation techniques reduced the number of microorganisms in the root canal lumen and dentine chips from the root thirds, but no significant differences were observed between the three groups (p > 0.05). Reciprocating instrumentation with Reciproc R50 was effective in reducing the number of microorganisms within the root canal system. Although this technique involves the use of only one file to perform the root canal therapy, it is as effective as conventional rotary instrumentation in reducing the E. faecalis biofilm from the root canal system. However, further clinical investigations are warranted in order to ratify these results.
journal_name
Braz Oral Resjournal_title
Brazilian oral researchauthors
Nakamura VC,Candeiro GT,Cai S,Gavini Gdoi
10.1590/1807-3107BOR-2015.vol29.0027subject
Has Abstractpub_date
2015-01-01 00:00:00eissn
1806-8324issn
1807-3107pii
S1806-83242015000100224journal_volume
29pub_type
杂志文章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
更新日期:2018-11-29 00:00:00
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
更新日期:2016-12-22 00:00:00
abstract::The aim of this study was to use the fluorescence in situ hybridization (FISH) technique to test the hypothesis of qualitative and quantitative differences of 8 periodontopathogens between pregnant and non-pregnant women. This cross-sectional study included 20 pregnant women in their second trimester of pregnancy and ...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242012000500011
更新日期:2012-09-01 00:00:00
abstract::This study evaluated the effects of the photoactivation source and restorative material on the development of caries-like lesions on human enamel after an in vitro pH challenge. Enamel cavities were prepared in 36 blocks, which were assigned to two groups according to the restorative material: resin-modified glass ion...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/S1806-83242013005000015
更新日期:2013-05-01 00:00:00
abstract::The aim of this study was to evaluate the preparation time and the amounts of apically extruded debris and irrigant using different nickel-titanium instrumentation systems. Forty-five extracted single-rooted mandibular premolar teeth were selected and divided into three groups. The root canals were instrumented accord...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107bor-2015.vol29.0002
更新日期:2015-01-01 00:00:00
abstract::The aim of this study was to determine the cutting ability of chemical vapor deposition (CVD) diamond burs coupled to an ultrasonic dental unit handpiece for minimally invasive cavity preparation. One standard cavity was prepared on the mesial and distal surfaces of 40 extracted human third molars either with cylindri...
journal_title:Brazilian oral research
pub_type: 杂志文章,随机对照试验
doi:10.1590/s1806-83242006000200012
更新日期:2006-04-01 00:00:00
abstract::Properly performed daily mechanical biofilm control is the most important prevention strategy for periodontal diseases. However, proper mechanical biofilm control is not performed effectively by the majority of the population, mainly due to lack of motivation and of manual dexterity. Local biofilm retention factors ma...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107bor-2014.vol28.0021
更新日期:2014-07-11 00:00:00
abstract::The purpose of this study was to analyze luxation injuries in children between the ages of 0 and 5 years treated at an emergency service department. A total of 1,703 records, corresponding to a period of 10 years at the Emergency Center of the Baby Clinic at Londrina State University, Brazil, were analyzed. The age, g...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242011000200009
更新日期:2011-03-01 00:00:00
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
更新日期:2016-01-01 00:00:00
abstract::Osteoporosis, a disease characterized by progressive bone loss, has been the target of several studies in the past few years. It results in a much higher risk for fractures and might cause slower bone lesion healing. The aim of this work was to study the effects of Risedronate (allopathic medicine) and Calcarea phosph...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242006000300003
更新日期:2006-07-01 00:00:00
abstract::Poor oral hygiene seems to be the norm in children and teenagers with Down Syndrome (DS). Advances in design and types of toothbrushes may improve biofilm control. This randomized, single-blind, crossover clinical trial evaluated the effectiveness of electric toothbrushes regarding mechanical control of biofilm in chi...
journal_title:Brazilian oral research
pub_type: 杂志文章,随机对照试验
doi:10.1590/1807-3107bor-2020.vol34.0057
更新日期:2020-06-19 00:00:00
abstract::The aim of this study was to establish two new formulas for objectively evaluating skeletal maturation of cervical vertebrae in female and male Brazilian subjects using lateral cephalometric radiographs. The sample included 128 girls and 110 boys, aged 7.0 to 15.9 years, from the files of the Oral Radiology Clinic, Pi...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242007000400009
更新日期:2007-10-01 00:00:00
abstract::The objective of this study was to compare the completion rates and performance of the Brazilian version of the Oral Health Impact Profile (OHIP14) when applied as an interview or in its original self-reported form. A convenience sample of 74 adult patients was selected in a Dental Clinic (University of Araras, Brazil...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242009000400002
更新日期:2009-10-01 00:00:00
abstract::The sense of coherence (SOC) is a measure of global orientation regarding the ability of individuals to cope with stressful situations. The aim of the present study was to evaluate the association between SOC and quality of life (QoL) and clinical and sociodemographic characteristics among survivors of oral, oropharyn...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107bor-2020.vol34.0009
更新日期:2020-02-07 00:00:00
abstract::There are many limitations to image acquisition, using conventional radiography, of the temporomandibular joint (TMJ) region. The Computed Tomography (CT) scan is a better option, due to its higher accuracy, for purposes of diagnosis, surgical planning and treatment of bone injuries. The aim of the present study was t...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242010000400016
更新日期:2010-10-01 00:00:00
abstract::The objective of this study was to evaluate children's respiratory patterns in the mixed dentition, by means of acoustic rhinometry, and its relation to the upper arch width development. Fifty patients were examined, 25 females and 25 males with mean age of eight years and seven months. All of them were submitted to a...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242009000400012
更新日期:2009-10-01 00:00:00
abstract::Coronavirus disease 2019 (COVID-19) has spread exponentially across the world. The typical manifestations of COVID-19 include fever, dry cough, headache and fatigue. However, atypical presentations of COVID-19 are being increasingly reported. Recently, a number of studies have recognized various mucocutaneous manifest...
journal_title:Brazilian oral research
pub_type: 杂志文章,评审
doi:10.1590/1807-3107bor-2020.vol34.0124
更新日期:2020-10-30 00:00:00
abstract::The aim of this study was to verify the prevalence of dental fluorosis in schoolchildren aged 6 to 15 and its possible association with the impacts on their daily activities. This study is observational, cross-sectional and analytical. A total of 513 schoolchildren from the city of Pinheiro Preto, SC, took part in thi...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242005000200014
更新日期:2005-04-01 00:00:00
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
更新日期:2004-01-01 00:00:00
abstract::Sickle cell anemia (SCA) is the most prevalent genetic disease worldwide. Recurrent vaso-occlusive infarcts predispose SCA patients to infections, which are the primary causes of morbidly and mortality. This study aimed to evaluate the relationship between SCA and endodontic diseases. Personal information, medical dat...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107BOR-2016.vol30.0060
更新日期:2016-05-20 00:00:00
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
更新日期:2016-01-01 00:00:00
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
更新日期:2018-08-06 00:00:00
abstract::Based on aroeira's (Myracrodruon urundeuva) antimicrobial activity and a future trend to compose intracanal medication, the aim of this study was to assess in vivo inflamatory tissue response to the extracts by edemogenic and histological analysis containing inactivated facultative and anaerobic microorganisms. For ed...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107bor-2018.vol32.0042
更新日期:2018-05-24 00:00:00
abstract::The cyclic resistance of ProTaper Universal (size 25/08) and ProTaper Next (size 25/06) instruments was compared in artificial canals with different curvatures in this study. A total of 30 ProTaper Universal and 30 ProTaper Next instruments were divided into 6 groups (n = 10) and were operated into artificial canals w...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107BOR-2015.vol29.0122
更新日期:2015-01-01 00:00:00
abstract::Candida infection is an important cause of morbidity and mortality in immunocompromised patients. The increase in its incidence has been associated with resistance to antimicrobial therapy and biofilm formation. The aim of this study was to evaluate the efficacy of tea tree oil (TTO) and its main component - terpinen-...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107bor-2020.vol34.0050
更新日期:2020-06-05 00:00:00
abstract::The objective of this split-mouth, double-blind, randomized controlled trial was to compare the clinical effect of treatment of 2- or 3-wall intrabony defects with open flap debridement (OFD) combined or not with enamel matrix proteins (EMP). Thirteen volunteers were selected with one pair of or more intrabony defects...
journal_title:Brazilian oral research
pub_type: 杂志文章,随机对照试验
doi:10.1590/s1806-83242007000300009
更新日期:2007-07-01 00:00:00
abstract::To estimate the prevalence and related aspects of periodontitis in a rural area of the State of Bahia, Brazil, this cross-sectional study was carried out in the village of Matinha dos Pretos, Feira de Santana County, Bahia, among 172 subjects ranging from 20 to 60 years of age. During household visits, a full-mouth pe...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242006000300014
更新日期:2006-07-01 00:00:00
abstract::The purpose of this study was to measure mass loss and surface roughness changes of different brands of flowable resin composites after a simulated toothbrushing test. The null hypotheses were that there would be no differences in mass loss and no significant changes in surface roughness after this test and that there...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242004000200012
更新日期:2004-04-01 00:00:00
abstract::The purpose of the present study was to evaluate the relationship between psychological variables and the clinical diagnosis of temporomandbular disorders (TMD) in 12-year-old adolescents. TMD pain was assessed by RDC/TMD examination (Research Diagnostic Criteria for Temporomandibular Disorders) (Axis I and II). Five-...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242009000200011
更新日期:2009-04-01 00:00:00
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
更新日期:2005-07-01 00:00:00