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Lorena O Mendes, Nathália E Machado, Paulo R Goldoni, Graziela G Mori
BACKGROUND: Endodontic infections require the use of root canal dressings to reduce microorganisms, and studies of new intracanal medications are common. Two experimental intracanal medications that contain antibiotics and chlorhexidine have been proposed. However, given the composition of these medications, tooth discolouration with subsequent impacts on aesthetic parameters is a concern. The objective of this study is to evaluate tooth discolouration after the use of experimental intracanal medications for up to 180 days...
May 23, 2018: Minerva Stomatologica
Cristiano Lazzari Pinto, Claudia Lopes Brilhante Bhering, Gabriel Rodrigues de Oliveira, Angélica Maroli, Vagner Flávio Reginato, Ricardo Armini Caldas, Atais Bacchi
PURPOSE: To evaluate the influence of different post systems on the biomechanical behavior of teeth with a severe loss of remaining coronal structure. MATERIALS AND METHODS: Fifty standardized bovine teeth (n = 10 per group) were restored with: cast post-and-core (CPC), prefabricated metallic post (PFM), parallel glass-fiber post (P-FP), conical glass-fiber post (C-FP), or composite core (no post, CC). The survival rate during thermomechanical challenging (TC), the fracture strength (FS), and failure patterns (FP) were evaluated...
May 14, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
Vivek Aggarwal, Mamta Singla, Sanjay Miglani, Ritu Sharma
This study evaluated the effect of 3 commercially available calcium silicate materials (CSMs) on pH changes in simulated root resorption defects. Simulated root resorption defects were prepared on the facial root surface of 40 mandibular premolars. The depth of each defect was individually calculated to standardize the remaining dentin thickness to 1 mm. Prepared canals were obturated with the 3 CSMs. Ten specimens were kept as controls, filled with unbuffered normal saline. The pH measurements were taken at 1 hour, 6 hours, 1 day, 1 week, 2 weeks, 3 weeks, 1 month, and 2 months...
May 2018: General Dentistry
Zahra Dalili Kajan, Mehran Taramsari, Negar Khosravi Fard, Farnoosh Khaksari, Forough Moghasem Hamidi
Introduction: The purpose of this study was to evaluate the efficacy of cone-beam computed tomography CBCT in the diagnosis of RF in the presence of an intracanal posts with and without applying "metal artifact reduction" (MAR) mode. Methods and Materials: This in vitro study included 60 single-canal endodontically treated premolars. Post spaces were created in all roots. RFs were simulated in 30 of the 60 teeth. Dentatus posts were cemented in 15 of 30 roots with and without RFs...
2018: Iranian Endodontic Journal
Tamara Yuanita, Nanik Zubaidah, Sri Kunarti
Introduction: The objective of this animal study was to promote East Java propolis as a potential natural intracanal medicament for periapical chronic apical periodontitis bone resorption through evaluating the expression of osteoprotegrin (OPG) and osteoclast level. Methods and Materials: Propolis extract was produced using a maceration procedure. Thirty Wistar rats were divided into three groups. In group I, the control group, the first upper right molar constituted a healthy tooth...
2018: Iranian Endodontic Journal
Radovan Žižka, Radim Čtvrtlík, Jan Tomaštík, Kamila Fačevicová, Ladislav Gregor, Jiří Šedý
Introduction: The purpose of this study was to examine the microhardness and modulus of elasticity (MOE) of White ProRoot MTA (Dentsply Tulsa Dental, Tulsa, OK) after setting in moist or dry intracanal conditions. Methods and Materials: To simulate root canal system, 14 polyethylen molds with internal diameter of 1 mm and height of 12 mm were used. These molds were filled with 9-mm thick layers of White ProRoot Mineral Trioxide Aggregate (MTA; Dentsply Tulsa Dental, Tulsa, OK)...
2018: Iranian Endodontic Journal
Bruna Cechella, Josiane de Almeida, Morgane Kuntze, Wilson Felippe
Background: It is unknown whether the bioactivity of Biodentine characterized by the precipitation of hydroxyapatite and formation of tags into the dentinal tubules improve its sealing ability as an apical plug. Aim: To evaluate the sealing ability provided by Biodentine and mineral trioxide aggregate (MTA) apical plugs, with or without phosphate-buffered saline (PBS) intracanal dressing, using a glucose leakage method. Material and Methods: The space of the canal of 100 root segments with about 12 mm long was shaped using Gates-Glidden...
February 2018: Journal of Clinical and Experimental Dentistry
Pallav Mahesh Patni, Pradeep Jain, Sumeet Jain, Hemalatha Hiremath, Rolly Agarwal, Mona Jain Patni
Treating pathological defects that are caused by resorption in teeth can be challenging. The task is complicated further if the resorption extends beyond the restrains of the root. The aim of this report is to describe a case of extensive internal tunneling resorption (ITR) associated with invasive cervical resorption (ICR) in a maxillary right lateral incisor and its nonsurgical treatment. A 22-year-old male was referred to the department of endodontics with a chief complaint of discolored maxillary right lateral incisor or tooth 12 and a history of trauma...
January 2018: Journal of Conservative Dentistry: JCD
Sherin Jose Chockattu, B S Deepak, K Mallikarjun Goud
Context: One of the important goals of root canal therapy is disinfection aided by irrigation and intracanal medicaments. Commonly used nonsteroidal anti-inflammatory agents have shown anti-bacterial activity, thus, when used as intracanal medicaments, nonantibiotic agents have the potential to provide anti-inflammatory, local analgesic, and anti-bacterial activity. Aim: The aim of this study is to evaluate and compare the anti-bacterial efficiency of anti-inflammatory nonantibiotics ibuprofen and diclofenac, and routinely used intracanal dressing calcium hydroxide (Ca[OH]2 ), against Enterococcus faecalis , in an endodontic model...
January 2018: Journal of Conservative Dentistry: JCD
S Miçooğullar Kurt, M K Çalışkan
AIM: To evaluate postoperative pain and radiographic evidence of periapical healing in teeth with apical periodontitis treated in one visit with an additional final irrigation using 2% chlorhexidine (CHX) and to compare the results with conventional two-visit root canal treatment (RCT) with an intracanal calcium hydroxide (CH) dressing as a control group. METHODOLOGY: Ninety asymptomatic maxillary anterior teeth with periapical lesions were treated by a single operator...
March 30, 2018: International Endodontic Journal
Priyatam Karade, Alexander Johnson, John Baeten, Rutuja Chopade, Upendra Hoshing
OBJECTIVE: This study evaluated intracanal smear layer removal using syringe and needle irrigation (ie, conventional irrigation [CI]) with and without adjunctive activation using EndoActivator® or EndoUltra®. MATERIALS AND METHODS: Thirty-five premolars were divided into three experimental groups (n = 10) and a control (n = 5): (1) CI, (2) CI plus sonic activation (EndoActivator), (3) CI plus ultrasonic activation (EndoUltra), or (4) CI using saline. All teeth were prepared to a size #40 K file...
April 2018: Compendium of Continuing Education in Dentistry
Vinaya Susan Varghese, Veerendra Uppin, Kishore Bhat, Madhu Pujar, Amruta B Hooli, Nirmal Kurian
Background: An efficient antimicrobial agent action is required for a predetermined time period for absolute elimination of root canal microbes. Till date, there is limited or no data on the antimicrobial effect of octenidine as an intracanal medicament with chitosan (CTS) as a carrier against Candida albicans and Enterococcus faecalis . Aim: The aim of this microbiological study was to compare the antimicrobial efficacy of octenidine hydrochloride (OHC) and calcium hydroxide (Ca[OH]2 ) as intracanal medicaments, both independently and along with CTS as a carrier molecule against the common resistant endodontic pathogens...
January 2018: Contemporary Clinical Dentistry
Kiran Rahul Halkai, Jayashree A Mudda, Vasundhara Shivanna, Vandana Rathod, Rahul Halkai
Background: The main objective of endodontic therapy is complete elimination and prevention of bacteria from the root canal system; however, it is difficult due to anatomical ramifications of root canal system and growing resistant microbes to available disinfectants. Therefore, to overcome this problem, newer antimicrobial agents have to be developed. Aims: The aim of the study was to evaluate the antibacterial efficacy of fungal-derived biosynthesized silver nanoparticles (AgNPs) against Enterococcus faecalis ...
January 2018: Contemporary Clinical Dentistry
Qingan Xu, Zhou Li
Regenerative endodontic treatment was performed on a mature maxillary premolar diagnosed as chronic pulpitis. The root canals were chemomechanically prepared and placed intracanal medicaments at the first appointment. Then 2 weeks later, a blood clot was created in the canals, over which mineral trioxide aggregate was placed. At 6-month follow-up, cementum-like tissue seemed to be formed in the root canal along with nearly recovered pulp vitality. At 12-month recall, the radiographic results revealed evidence of root wall thickening...
2018: Case Reports in Dentistry
Thais M Duque, Maira Prado, Daniel R Herrera, Brenda P F A Gomes
OBJECTIVE: The aim of the present study was to investigate the effects of a calcium hydroxide-based intracanal medication (ICM) on periodontal and endodontic infectious/inflammatory contents and on periodontal clinical parameters in teeth with primary periodontal lesion and secondary endodontic involvement. MATERIALS AND METHODS: Ten patients with abnormal pulp test results and deep probing depth derived from primary periodontal disease with secondary endodontic involvement were included...
March 23, 2018: Clinical Oral Investigations
Chang Zeng, Mohamed M Meghil, Marcus Miller, Yaping Gou, Christopher W Cutler, Brian E Bergeron, Lina Niu, Jingzhi Ma, Franklin R Tay
OBJECTIVES: The effect of irrigation time on the antimicrobial efficacy of an apical negative pressure irrigation system was examined in vitro, followed by validation of the antimicrobial effect in vivo using the identified optimal irrigation time. METHODS: For the in vitro experiment, 44 extracted premolars were decoronated, instrumented, autoclaved and inoculated with Enterococcus faecalis (ATCC 29212) for 21 days. Four teeth were used as positive control, without irrigation...
March 20, 2018: Journal of Dentistry
Sônia T de O Lara-Mendes, Camila de Freitas M Barbosa, Caroline C Santa-Rosa, Vinícius C Machado
The aim of this study was to describe a guided endodontic technique that facilitates access to root canals of molars presenting with pulp calcifications. A 61-year-old woman presented to our service with pain in the upper left molar region. The second and third left molars showed signs of apical periodontitis confirmed by the cone-beam computed tomographic (CBCT) scans brought to us by the patient at the initial appointment. Conventional endodontic treatment was discontinued given the difficulty in locating the root canals...
May 2018: Journal of Endodontics
Ju-Hyoung Lee
Due to the increased esthetic demands, custom zirconia post-and-cores have recently become popular. A post-and-core pattern with acrylic resin or wax is scanned using a laboratory scanner for the design of a definitive post-and-core restoration. This procedure requires additional time and material handling experience. If a scan post is used for an intracanal digital impression, substantial initial investments for hardware and software are required. This article introduces an alternative technique for fabricating a custom zirconia post-and-core with a conventional impression...
March 8, 2018: Journal of Prosthetic Dentistry
M R Karamooz-Ravari, R Dehghani
Nowadays, NiTi rotary endodontic files are of great importance due to their flexibility which enables the device to cover all the portions of curved canal of tooth. Although this class of files are flexible, intracanal separation might happen during canal preparation due to bending or torsional loadings of the file. Since fabrication and characterization of such devices is challenging, time-consuming, and expensive, it is preferable to predict this failure before fabrication using numerical models. It is demonstrated that NiTi shape memory alloy shows asymmetric material response in tension and compression which can significantly affect the lifetime of the files fabricated from...
May 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
J Bi, Y Liu, X M Liu, L M Jiang, X Chen
AIM: To investigate the antibacterial activity of a novel intracanal medicament, iRoot FM, against Porphyromonas endodontalis and its effects on the proliferation and osteo-/odontogenic differentiation of stem cells from apical papilla (SCAP). METHODOLOGY: The agar diffusion test was used to compare the antimicrobial efficacy of iRoot FM with two traditional intracanal medicaments, calcium hydroxide [Ca(OH)2 ] and triple antibiotic paste (TAP). The CCK-8 assay was used to assess the proliferation rate of SCAP when exposed to the three intracanal medicaments...
March 7, 2018: International Endodontic Journal
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