Abstract:
INTRODUCTION:Dental discoloration with use of materials containing bismuth oxide has been reported. It is postulated that the discoloration is a result of chemical interaction of bismuth oxide with dentin. The aim of the study was to analyze dental color alteration and the chemical interaction of bismuth oxide with the main components present in composite (methacrylate) and in dentin (collagen). METHODS:Fifty bovine teeth were prepared and filled with white mineral trioxide aggregate (MTA) Angelus, Portland cement (PC) with 20% zirconium oxide, or PC with 20% calcium tungstate and then sealed with composite. Triple antibiotic paste and unfilled samples were the positive and negative controls, respectively. The specimens were stored in separate flasks immersed in tap water at 37°C with ambient light blocked out. The color assessment was performed with a spectrophotometer at different intervals, namely before filling and 24 hours, 15 days, and 30 days after filling. The color change and the luminosity were calculated. The statistical analysis was performed by using nonparametric Kruskal-Wallis and Dunn tests (P < .05). The interaction of the bismuth oxide, zirconium oxide, and calcium tungstate with collagen and methacrylate was assessed by placing the materials in contact, followed by color assessment. RESULTS:The analysis of color change values showed that all the materials presented color alteration after the evaluated periods. Statistically higher luminosity was verified for PC/20% zirconium oxide in comparison with white MTA Angelus (P < .05). The teeth filled with white MTA Angelus demonstrated a grayish discoloration with evident dentin staining. Bismuth oxide exhibited a color change when in contact with collagen. CONCLUSIONS:The color of white MTA Angelus was altered in contact with dental structures. Collagen, which is present in dentin matrix, reacted with bismuth oxide, resulting in a grayish discoloration. The use of an alternative radiopacifier to replace bismuth in white MTA is indicated.
journal_name
J Endodjournal_title
Journal of endodonticsauthors
Marciano MA,Costa RM,Camilleri J,Mondelli RF,Guimarães BM,Duarte MAdoi
10.1016/j.joen.2014.01.044subject
Has Abstractpub_date
2014-08-01 00:00:00pages
1235-40issue
8eissn
0099-2399issn
1878-3554pii
S0099-2399(14)00121-6journal_volume
40pub_type
杂志文章abstract::The purpose of this study was to compare ultrasonic and high-speed-bur root-end preparations. Seventy-six roots from 29 bilaterally matched pairs of human teeth in cadavers were used in this study. In group 1 ultrasonic preparations were made in 38 roots and filled with amalgam. In group 2 high-speed bur preparations ...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/s0099-2399(97)80301-9
更新日期:1997-07-01 00:00:00
abstract:INTRODUCTION:Irrigation dynamics and antibacterial activity determine the efficacy of root canal disinfection. Sonic or ultrasonic agitation of irrigants is expected to improve irrigation dynamics. This study examined the effects of microbubble emulsion (ME) combined with sonic or ultrasonic agitation on irrigation dyn...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2012.07.007
更新日期:2012-11-01 00:00:00
abstract:INTRODUCTION:Long-term predictability of restored endodontically treated teeth is important for the decision of tooth retention versus extraction and implant placement. The purpose of this study was to validate the hypothesis that preoperative factors can predict the long-term prognosis of molars requiring endodontic a...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2010.10.005
更新日期:2011-01-01 00:00:00
abstract::A technique using K files with modified tips has been developed for the penetration of constricted canals. The tip of a #10 K file was sliced diagonally to make it thinner. Because this modified K file has an especially fine tip and an appropriate stiffness, it followed constricted or sharply curved canals well and ha...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/S0099-2399(97)80190-2
更新日期:1997-06-01 00:00:00
abstract:INTRODUCTION:This in vitro study compared the performance of the XP-endo Shaper (XP; FKG, La Chaux-de-Fonds, Switzerland) in curved canals when used with a higher speed (3000 rpm) without a glide path with the manufacturer's protocol. METHODS:Twenty extracted mandibular molars with separate mesial curved canals were m...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2019.10.014
更新日期:2020-01-01 00:00:00
abstract:INTRODUCTION:Platelet-rich plasma (PRP) has been widely used in regenerative dentistry for over 2 decades. Nevertheless, previous studies have shown that its growth factor content is released over a short time period, and the application of anticoagulants limits its regenerative potential. Therefore, a second-generatio...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2019.04.002
更新日期:2019-08-01 00:00:00
abstract::The most striking disadvantage of most apex locators is that if there are electrolytes in the canal the meter shows a reading which is too short or sometimes the measurement itself becomes impossible. To overcome this drawback, a new concept for electrically measuring the root canal length has been developed. The devi...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/S0099-2399(06)80053-1
更新日期:1994-03-01 00:00:00
abstract:INTRODUCTION:The management of endodontic emergencies has been particularly challenging during the coronavirus disease 2019 (COVID-19) outbreak because of the possible generation of airborne particles and aerosols. The aim of this report was to contribute to the practice of endodontics by proposing a general protocol f...
journal_title:Journal of endodontics
pub_type: 杂志文章,评审
doi:10.1016/j.joen.2020.09.018
更新日期:2021-01-01 00:00:00
abstract::EDTA-T and 10% citric acid used as root canal irrigants lead to more visible dentinal tubules than 5% sodium hypochlorite associated with 3% hydrogen peroxide. However, these cleansing agents must be compatible with apical periodontal tissue. We analyzed the cytotoxicity of 10% citric acid and EDTA-T in cultured fibro...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1097/00004770-200112000-00007
更新日期:2001-12-01 00:00:00
abstract:INTRODUCTION:The aim of this study was to investigate the release of growth factors into root canal space after the irrigation procedure of regenerative endodontic procedure. METHODS:Sixty standardized root segments were prepared from extracted single-root teeth. Nail varnish was applied to all surfaces except the roo...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2016.04.029
更新日期:2016-12-01 00:00:00
abstract::The choice of one-visit versus two-visit root canal therapy for necrotic teeth with apical periodontitis is a source of current debate. The primary objective of this randomized controlled clinical trial was to compare radiographic evidence of periapical healing after root canal therapy completed in one visit or two vi...
journal_title:Journal of endodontics
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.joen.2007.12.015
更新日期:2008-03-01 00:00:00
abstract:INTRODUCTION:Prilocaine plain has a high pH and concentration (4%), which could decrease the pain of injection and increase success. The purpose of this study was to compare pain associated with anesthetic solution deposition and the degree of pulpal anesthesia obtained with the combination of prilocaine and lidocaine ...
journal_title:Journal of endodontics
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.joen.2018.01.004
更新日期:2018-05-01 00:00:00
abstract::This study highlighted the characteristics and distribution of cracked tooth syndrome (CTS) and the associated factors in adult attendees in the University of Nigeria Teaching Hospital. Three hundred seventy patients aged 18 years to 77 years with CTS-like conditions were included and studied over 12 months. The follo...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2008.12.011
更新日期:2009-03-01 00:00:00
abstract:INTRODUCTION:Growth and differentiation factor-5 (GDF-5) is a multifunctional protein that regulates the development and repair in many tissues. The purpose of this study was to investigate whether GDF-5 may influence the proliferation, differentiation, and collagen turnover of human dental pulp cells. METHODS:Human d...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2013.06.003
更新日期:2013-10-01 00:00:00
abstract:INTRODUCTION:Outcome studies of endodontic treatment of necrotic immature permanent teeth rely on radiographic measures as surrogates of whether the treatment achieved regeneration/revascularization/revitalization. An increase in radiographic root length and/or width is thought to result in a better long-term prognosis...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2013.09.025
更新日期:2014-01-01 00:00:00
abstract:INTRODUCTION:Recent evidence finds mineral trioxide aggregate (MTA) more effective than calcium hydroxide (CH) for direct pulp capping (DPC). The present study assessed the cost-effectiveness of MTA versus CH for DPC using a model-based simulation approach. METHODS:A mixed public/private payer perspective in the conte...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2015.08.019
更新日期:2015-12-01 00:00:00
abstract::A nested polymerase chain reaction (PCR)-based method was used to directly survey samples taken from primary endodontic infections for the occurrence of Pseudoramibacter alactolyticus. Identification by nested PCR was performed in root-canal samples from teeth associated with asymptomatic periradicular lesions or acut...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1097/00004770-200311000-00012
更新日期:2003-11-01 00:00:00
abstract:INTRODUCTION:Calcium silicate-based materials (CSMs) are used in various endodontic procedures. The present study examined whether prolonged contact of mineralized dentin with recently commercialized versions of these materials adversely affects dentin collagen matrix integrity. METHODS:Dentin slabs prepared from extr...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2012.01.004
更新日期:2012-06-01 00:00:00
abstract::The purpose of the present study was to investigate the effect of laser irradiation on calcified nodule formation in human dental pulp (HDP) cells. HDP cells were irradiated once with a Ga-Al-As laser for 5 and 10 min, and calcified nodule formation was determined by von Kossa staining. The laser irradiation increased...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/S0099-2399(99)80395-1
更新日期:1999-01-01 00:00:00
abstract:INTRODUCTION:This review aimed to find the most effective oral premedication in reducing pain in adults after nonsurgical root canal therapy (NSRCT) using network meta-analysis. METHODS:The review protocol was registered in the PROSPERO database (CRD42017071899). A literature search was performed in the MEDLINE and EB...
journal_title:Journal of endodontics
pub_type: 杂志文章,meta分析
doi:10.1016/j.joen.2018.10.016
更新日期:2019-04-01 00:00:00
abstract:INTRODUCTION:The aim was to present a novel surgical technique using virtually preplanned 3-dimensional (3D)-printed templates for guided osteotomies. These were to ensure atraumatic uncovering of a severely impacted donor tooth including guided drilling of the recipient alveolus followed by a secure autotransplantatio...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2020.07.024
更新日期:2020-07-29 00:00:00
abstract:INTRODUCTION:The aim of this study was to examine whether Enterococcus faecalis isolates from endodontic patients (from saliva and from a root canal) are able to prevail against salivary bacteria when grown in coculture in a biofilm reactor. METHODS:Saliva that was tested to be free of E. faecalis was used as the inoc...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2009.04.013
更新日期:2009-07-01 00:00:00
abstract::Primary intraosseous salivary gland tumors are rare, with mucopidermoid carcinoma being the most frequent histotype. The authors present a case of adenoid cystic carcinoma, located in the mandibular incisor region, associated with pain. Endodontic treatment resulted in increased pain and progressive mandibular expansi...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1097/00004770-200012000-00026
更新日期:2000-12-01 00:00:00
abstract:INTRODUCTION:It is important to develop an antimicrobial agent without any damage on dental pulp. In the present study, we examined whether pretreatment of bacterial lipopolysaccharides (LPS) with ozonated water (O(3)aq) improves LPS-induced responses of rat odontoblastic cell line, KN-3. METHODS:After the pretreatmen...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2009.01.016
更新日期:2009-05-01 00:00:00
abstract:INTRODUCTION:Elucidating the microbial ecology of endodontic infections (EIs) is a necessary step in developing effective intracanal antimicrobials. The aim of the present study was to investigate the bacterial composition of symptomatic and asymptomatic primary and persistent infections in a Greek population using hig...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2015.03.010
更新日期:2015-08-01 00:00:00
abstract:INTRODUCTION:Cell migration is an important step in pulpal wound healing. Although components in the resin-based dental materials are known to have adverse effects on pulp wound healing including proliferation and mineralization, their effects on cell migration have been scarcely examined. Here, we investigated the eff...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2013.06.004
更新日期:2013-09-01 00:00:00
abstract::The purpose of this study was to compare the wicking propensity of multifilament sutures. Dexon II, Vicryl, and black silk suture (BSS) were dipped in saline or soaked for 48 h, then suspended on a microscope slide. Fluorescein isothiocyanate-dextran (FITC-D) was placed at the suture mid points, and its movement was o...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1097/01.don.0000121617.67923.05
更新日期:2004-09-01 00:00:00
abstract:INTRODUCTION:The aim of this study was to compare the efficacy of passive ultrasonic irrigation (PUI) and the EndoVac (EV) System (Discus Dental, Culver City, CA) in hard tissue debris removal and its influence on the quality of the root canal filling with the aid of micro-computed tomographic scanner. METHODS:Twenty-...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2015.05.001
更新日期:2015-10-01 00:00:00
abstract::No information could be found in the dental literature on the hardness or strength of the materials in root canal instruments. Hardness testing is a convenient method for examining these products, and strength properties can be deduced from available strength-hardness data. The Vickers hardness of cross-sections of st...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/S0099-2399(96)80274-3
更新日期:1996-02-01 00:00:00
abstract::Studies of endodontic outcomes suggest that fracture of the tooth after endodontic therapy may be a greater problem than endodontic reinfection. Immediate full coverage with or without a post and core is the best way to prevent fracture. Unfortunately, in many population areas, due predominantly to cost, this restorat...
journal_title:Journal of endodontics
pub_type: 杂志文章,评审
doi:10.1016/j.joen.2019.12.012
更新日期:2020-04-01 00:00:00