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Mineral trioxide aggregate

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https://www.readbyqxmd.com/read/28642923/the-influence-of-particle-size-and-curing-conditions-on-testing-mineral-trioxide-aggregate-cement
#1
William Nguyen Ha, Bill Kahler, Laurence James Walsh
Objectives: To assess the effects on curing conditions (dry versus submerged curing) and particle size on the compressive strength (CS) and flexural strength (FS) of set MTA cement. Materials and methods: Two different Portland cements were created, P1 and P2, with P1 < P2 in particle size. These were then used to create two experimental MTA products, M1 and M2, with M1 < M2 in particle size. Particle size analysis was performed according to ISO 13320. The particle size at the 90th percentile (i.e. the larger particles) was P1: 15...
December 2016: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28642908/methodologies-for-measuring-the-setting-times-of-mineral-trioxide-aggregate-and-portland-cement-products-used-in-dentistry
#2
William Nguyen Ha, Timothy Nicholson, Bill Kahler, Laurence James Walsh
Objective The current standard used to measure setting time for Mineral Trioxide Aggregate (MTA) involves indentation testing with arbitrary weights. This study compared indentation testing against rheological measurements and assessed the influences of particle size and the inclusion of bismuth oxide on the setting time of experimental MTA and Portland cement (PC). Material and methods Two PCs (P1 and P2) of different particle sizes were produced using the same clinker. From these two PCs, two experimental MTAs (M1 and M2) were created with the addition of bismuth oxide...
December 2016: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28638556/effects-of-different-powder-to-liquid-ratios-on-the-push-out-bond-strength-of-cem-cement-on-simulated-perforations-in-the-furcal-area
#3
Mohammad-Frough Reyhani, Negin Ghasemi, Vahid Zand, Saba Mosavizadeh
BACKGROUND: Proper bond strength to dentin is one of the properties of biomaterials used for therapeutic purposes such as repair of furcal perforations. The aim of the present study to evaluate the effects of different powder to liquid ratios of Calcium-enriched mixture (CEM) on the push-out bond strengths in simulated perforations in the furcal area and compare it with Mineral trioxide aggregate (MTA). MATERIAL AND METHODS: Furcal perforations, measuring 1.3 mm in diameter and 2 mm in height, were prepared in 120 mandibular first molars...
June 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28621272/radiopacity-of-mineral-trioxide-aggregate-with-and-without-inclusion-of-silver-nanoparticles
#4
Mariana Ss Mendes, Leonardo D Resende, Cláudia A Pinto, Denise P Raldi, Flavia Gr Cardoso, Sandra M Habitante
AIM: The aim of this study was to investigate the inclusion of silver nanoparticles (Ag NPs) in the mineral trioxide aggregate (MTA) composition to know which changes will result in the radiopacity of the material. MATERIALS AND METHODS: The experiment was performed according to the American National Standard Institute/American Dental Association specification no. 57/2000 and ISO 6876/2001. Five plates with five holes measuring 1 mm in depth and 5 mm in internal diameter were filled according to the different experimental groups as follows: white mineral trioxide aggregate (WMTA) + NP50 - W MTA with liquid Ag NP 50 ppm, WMTA + NP30 - W MTA with liquid Ag NP 30 ppm, WMTA + NP22 - W MTA with liquid Ag NP 22 ppm, WMTA + NPP - white MTA with liquid Ag NP and powder 1%, WMTA (control)...
June 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28581920/randomized-clinical-trial-to-evaluate-mta-indirect-pulp-capping-in-deep-caries-lesions-after-24-months
#5
U Koc Vural, A Kiremitci, S Gokalp
OBJECTIVE: This clinical study aimed to assess the efficacies of mineral trioxide aggregate (MTA) and calcium hydroxide [Ca(OH)2] in the treatment of deep carious lesions by the direct complete caries removal technique. METHODS AND MATERIALS: A total of 100 permanent molar/premolar teeth were capped with either Ca(OH)2 (n=49) or MTA (n=51) and restored with composite resin in 73 patients. Periapical radiographs were acquired prior to the treatment as well as at six, 12, and 24 months posttreatment...
June 5, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28578893/long-term-success-of-nonvital-immature-permanent-incisors-treated-with-a-mineral-trioxide-aggregate-plug-and-adhesive-restorations-a-case-series-from-a-private-endodontic-practice
#6
Marga H Ree, Richard S Schwartz
This case series evaluated the long-term clinical outcome of nonvital immature teeth treated with mineral trioxide aggregate (MTA) as an apical barrier and an adhesive restoration with or without a fiber post. Eighty-three teeth in 72 patients were treated by the first author with an apical MTA plug and an adhesive restoration of composite resin and in 45 of the 83 teeth 1 or more fiber posts. All of the patients had been referred to the first author's private endodontic practice with at least 1 immature tooth with signs of pulpal necrosis and subsequent apical periodontitis that had been caused by a variety of traumatic dental injuries...
June 1, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28577961/histologic-evaluation-of-regenerative-endodontic-procedures-with-the-use-of-chitosan-scaffolds-in-immature-dog-teeth-with-apical-periodontitis
#7
Paulo J Palma, João C Ramos, João B Martins, Anibal Diogenes, Maria H Figueiredo, Paula Ferreira, Carlos Viegas, João M Santos
INTRODUCTION: The aim of this study was to evaluate histologically the newly formed tissues after regenerative endodontic procedures (REPs) in dogs using either a blood clot (BC) or 2 different formulations of a chitosan hydrogel as scaffolds. METHODS: Apical periodontitis was induced by inoculating immature teeth with oral plaque in 4 beagle dogs. Teeth (n = 96) were divided into 2 control (n = 20) and 4 test groups (n = 76) according to the treatment: apexification and REPs with BC, sodium hyaluronate:chitosan (HA:CS) scaffolds, or pectin:chitosan (P:CS) scaffolds...
May 31, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28571484/sclerostin-deficiency-promotes-reparative-dentinogenesis
#8
A-M Collignon, N Amri, J Lesieur, J Sadoine, S Ribes, S Menashi, S Simon, A Berdal, G Y Rochefort, C Chaussain, C Gaucher
In humans, the SOST gene encodes sclerostin, an inhibitor of bone growth and remodeling, which also negatively regulates the bone repair process. Sclerostin has also been implicated in tooth formation, but its potential role in pulp healing remains unknown. The aim of this study was to explore the role of sclerostin in reparative dentinogenesis using Sost knockout mice ( Sost(-/-)). The pulps of the first maxillary molars were mechanically exposed in 3-mo-old Sost(-/-) and wild-type (WT) mice ( n = 14 mice per group), capped with mineral trioxide aggregate cement, and the cavities were filled with a bonded composite resin...
March 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28571272/effect-of-oral-tissue-fluids-on-compressive-strength-of-mta-and-biodentine-an-in-vitro-study
#9
Divya Subramanyam, Madhusudhan Vasantharajan
INTRODUCTION: Over the past many years various root end filling materials have been used which have been tested for their physical properties but each of them had certain limitations. In clinical practice, root end filling materials are exposed to oral tissue fluids which may compromise their longevity. AIM: The aim of this study was to investigate the effects of oral tissue fluids on compressive strength of Mineral Trioxide Aggregate (MTA) and biodentine. MATERIALS AND METHODS: MTA and biodentine cylinders measuring 6 mm × 4 mm were prepared using acrylic blocks...
April 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28566863/in-vivo-comparative-evaluation-of-mineral-trioxide-aggregate-and-formocresol-pulpotomy-in-primary-molars-a-60-month-follow-up-study
#10
Shivayogi M Hugar, Ravindranath Reddy, Shobha D Deshpande, Anand Shigli, Niraj S Gokhale, Shweta S Hugar
INTRODUCTION: Pulpotomy is a regular procedure in the management of inflamed primary teeth. Diverse materials have been reviewed for the pulpotomy, some of them being formocresol, glutaraldehyde, ferric sulfate, and mineral trioxide aggregate (MTA). AIMS: The aim was to evaluate and compare clinically and radiographically the effects of MTA as a pulp dressing after coronal pulp amputation (pulpotomy) in primary molars. SETTINGS AND DESIGN: Sixty primary molars of thirty healthy children using split mouth design aged between 4 and 6 years were treated by pulpotomy technique...
January 2017: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/28566860/comparative-evaluation-of-fresh-aloe-barbadensis-plant-extract-and-mineral-trioxide-aggregate-as-pulpotomy-agents-in-primary-molars-a-12-month-follow-up-study
#11
Mehak Kalra, Nishita Garg, Mandeep Rallan, Lumbini Pathivada, Ramakrishna Yeluri
BACKGROUND: The purpose of this study was to compare the clinical and radiographic outcomes of fresh Aloe vera barbadensis plant extract and mineral trioxide aggregate (MTA) as pulpotomy agents in primary molar teeth. MATERIALS AND METHODS: Pulpotomy procedure was performed in sixty primary molar teeth which were randomly allocated to two groups, i.e., Aloe vera pulpotomy (Group A) and MTA pulpotomy (Group B). All the pulpotomized teeth were evaluated clinically and radiographically at 1, 3, 6, 9, and 12 months of time interval using predetermined criteria...
January 2017: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/28528141/portland-cement-induces-human-periodontal-ligament-cells-to-differentiate-by-upregulating-mir-146a
#12
Min-Ching Wang, Li-Yin Yeh, Wen-Yu Shih, Wan-Chun Li, Kuo-Wei Chang, Shu-Chun Lin
BACKGROUND/PURPOSE: Bioaggregates such as Portland cement (PC) can be an economical alternative for mineral trioxide aggregate (MTA) with additional benefit of less discoloration. MTA has been known to induce differentiations of several dental cells. MicroRNAs are important regulators of biological processes, including differentiation, physiologic homeostasis, and disease progression. This study is to explore how PC enhances the differentiation of periodontal ligament (PDL) cells in microRNAs level...
May 18, 2017: Journal of the Formosan Medical Association, Taiwan Yi Zhi
https://www.readbyqxmd.com/read/28527851/intentional-replantation-of-an-avulsed-immature-permanent-incisor-a-case-report
#13
Claudio Maniglia-Ferreira, Fabio de Almeida Gomes, Marcelo de Morais Vitoriano
This case report discusses the successful endodontic treatment of an open apex maxillary right permanent central incisor that had been avulsed and incorrectly replanted in a 7-year-old patient. The tooth was carefully re-extracted followed by cleaning of the alveolar socket and immediate replantation. However, pulp necrosis was diagnosed, and regenerative endodontic treatment was performed. The root canal system was disinfected by passive ultrasonic irrigation with 2.5% sodium hypochlorite. At the first visit, the tooth was repositioned and immobilized with an appropriate semirigid splint...
May 17, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28527848/combined-therapy-for-a-rare-case-of-type-iii-dens-invaginatus-in-a-mandibular-central-incisor-with-a-periapical-lesion-a-case-report
#14
Ping Zhang, Xin Wei
Type III dens invaginatus has a complex root canal structure that poses a greater challenge when endodontic treatment is necessary. Type III dens invaginatus rarely affects mandibular central incisors. In this case, we reported a combined therapy of type III dens invaginatus in a mandibular central incisor with a periapical lesion. Cone-beam computed tomographic (CBCT) imaging was used in the diagnosis and management of the unusual anatomy of dens invaginatus. First, the hard tissue of the dens invaginatus was removed using a dental operating microscope...
May 17, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28527846/characterization-of-dental-pulp-myofibroblasts-in-rat-molars-after-pulpotomy
#15
Naoki Edanami, Nagako Yoshiba, Naoto Ohkura, Ryosuke Takeuchi, Aiko Tohma, Yuichiro Noiri, Kunihiko Yoshiba
INTRODUCTION: Myofibroblasts express alpha smooth muscle actin (α-SMA) and play a critical role in wound healing. Myofibroblast differentiation is controlled by the joint actions of transforming growth factor beta 1 (TGF-β1) and the extradomain A fibronectin splice variant (EDA-FN). Currently, the contribution of myofibroblasts to dental pulp healing is unknown. Therefore, we analyzed expressional characteristics of α-SMA-positive cells and investigated TGF-β1, EDA-FN, and α-SMA expression levels after pulpotomy to better understand dental pulp healing...
May 17, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28525679/retrospective-evaluation-of-healing-of-periapical-lesions-after-unintentional-extrusion-of-mineral-trioxide-aggregate
#16
Levent Demiriz, Ebru Hazar Bodrumlu
BACKGROUND: During the apexification procedure for teeth with open apices, mineral trioxide aggregate (MTA) may be unintentionally extruded. The aim of the present study was the retrospective evaluation of the healing of periapical lesions in permanent incisor teeth with open apices after the unintentional extrusion of MTA. METHODS: The clinical and radiographic records of 55 maxillary permanent central teeth treated by MTA apexification were evaluated. Filled teeth with unintentionally extruded MTA were selected as group 1 (n = 21), whereas the teeth with no MTA extrusion were selected as group 2 (n = 34)...
May 19, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28513520/clinical-assessment-of-mineral-trioxide-aggregate-in-the-treatment-of-deep-carious-lesions
#17
U K Vural, A Kiremitçi, S Gökalp
OBJECTIVE: This clinical study aimed to assess the effectiveness of mineral trioxide aggregate (MTA) and calcium hydroxide (Ca[OH]2) in the treatment of deep carious lesions using the direct complete caries excavation technique. SUBJECTS AND METHODS: Hundred permanent molars/premolars were capped either with Ca (OH)2 (n = 49) or MTA (n = 51) and restored with composite resin in 73 patients. Periapical radiographs were taken prior to the treatment, at 6 months and 12 months...
May 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/28512536/effect-of-smear-clear-and-some-other-commonly-used-irrigants-on-dislodgement-resistance-of-mineral-trioxide-aggregate-to-root-dentin
#18
Mona Sadegh, Hasti Sohrabi, Mohamadjavad Kharazifard, Farzaneh Afkhami
BACKGROUND: This study aimed to assess the push-out bond strength of mineral trioxide aggregate (MTA) to root canal dentin after irrigation with Smear Clear in comparison with 2.5% sodium hypochlorite (NaOCl), 2% chlorhexidine (CHX) and saline as commonly used root canal irrigants. MATERIAL AND METHODS: The coronal and mid-root areas of maxillary anterior teeth were horizontally sectioned into one-millimeter thick slices. The root canal lumen of dentinal slices was dilated using a diamond bur with 1...
May 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28512497/management-of-perforating-idiopathic-internal-root-resorption
#19
Dalia Abdullah, Farah Eziana Hussein, Huwaina Abd Ghani
This case report describes the endodontic treatment of an idiopathic perforated internal root resorption. A 24-year-old male Malay patient presented with internal root resorption of two of his anterior teeth. The medical history was non-contributory and he had no history of traumatic injury or orthodontic treatment. Cone-beam computed tomography (CBCT) determined the nature, location and severity of the resorptive lesion. Non-surgical root canal treatment of tooth #22 and combined non-surgical and surgical approach for tooth #11 were carried out using mineral trioxide aggregate (MTA) as the filling material...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28512495/endodontic-management-of-open-apex-teeth-using-lyophilized-collagen-sponge-and-mta-cement-report-of-two-cases
#20
Miriam Graziele Magro, Milton Carlos Kuga, Weber Adad Ricci, Kátia Cristina Keine, Mateus Rodrigues Tonetto, Suellen Linares Lima, Alvaro Henrique Borges, Lauriê Garcia Belizário, Matheus Coêlho Bandeca
Teeth with open apices, such as in immature teeth or those with apical root resorption are clinical cases with difficult immediate resolution. With the use of mineral trioxide aggregate (MTA) in dentistry, it was possible to optimize the treatment time of these cases by immediate placement of apical plug and the root canal filling. However, some negative effects can occur if MTA is extruded beyond the apex. To avoid this accident, it has been recommended to use of an apical matrix prior to placement of MTA...
2017: Iranian Endodontic Journal
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