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Endodontics

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https://www.readbyqxmd.com/read/28922597/core-shell-silver-nanoparticles-in-endodontic-disinfection-solutions-enable-long-term-antimicrobial-effect-on-oral-biofilms
#1
Elif Ertem Bekdemir, Beatrice Gutt, Flavia Zuber, Sergio Allegri, Benjamin Le Ouay, Selma Mefti, Kitty Formentin, Francesco Stellacci, Qun Ren
To achieve effective long-term disinfection of the root canals, we synthesized core-shell silver nanoparticles (AgNPs@SiO2) and used them to develop two irrigation solutions containing sodium phytate (SP) and ethylene glycol-bis(β-aminoethyl ether)-N,N,N',N'-tetraacetic acid (EGTA), respectively. Ex vivo studies with instrumented root canals revealed that the developed irrigation solutions can effectively remove the smear layer from the dentinal surfaces. Further in vitro experiments with single and multi-species biofilms demonstrated for the first time that AgNPs@SiO2 based irrigation solutions possess excellent antimicrobial activities for at least 7 days, whereas the bare AgNPs lose the activity almost immediately and do not show any antibacterial activity after 2 days...
September 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28922064/erbium-yttrium-aluminum-garnet-laser-activated-sodium-hypochlorite-irrigation-a-promising-procedure-for-minimally-invasive-endodontics
#2
Xiaogang Cheng, Tiantian Tian, Yu Tian, Doudou Xiang, Jun Qiu, Xiaohua Liu, Qing Yu
OBJECTIVE: This study was to evaluate the potential of Erbium:Yttrium Aluminum Garnet laser-activated sodium hypochlorite irrigation (Er:YAG + NaOCl) for minimally invasive endodontics (MIE). BACKGROUND DATA: Er:YAG laser irradiation can dramatically enhance the penetration of NaOCl, which may be a promising protocol for MIE. METHODS: Extracted human teeth were contaminated with Enterococcus faecalis for 4 weeks. The infected canals were then shaped to different apical terminal working widths (ATWW, 15#/0...
September 14, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28920780/use-of-composite-materials-as-a-component-of-tusk-fracture-management-in-an-asian-elephant-elephas-maximus-and-an-african-elephant-loxodonta-africana
#3
Richard R Sim, Elizabeth Stringer, Dennis Donovan, Rachael Chappell, Pat Flora, Jon Hall, Selvum Pillay, Benjamin G Willis, Stephanie McCain
Tusk fractures in Asian (Elephas maximus) and African elephants (Loxodonta africana) can result in damage to the distal end or to longitudinal cracks, potentially progressing to pulpitis. With pulp exposure, endodontic therapy is the treatment of choice, but conservative therapy has sufficed for some elephants. This manuscript describes the use of composite materials as a component of tusk fracture management. A 7-yr-old male Asian elephant fractured the distal end of both tusks with pulp exposure in one. Capping of each tusk with a Kevlar/fiberglass composite prevented further damage, and a modification allowed care of the exposed pulp tissue...
September 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28920140/frequency-location-and-association-with-dental-pathology-of-mucous-retention-cysts-in-the-maxillary-sinus-a-radiographic-study-using-cone-beam-computed-tomography-cbct
#4
Andy Wai Kan Yeung, Ray Tanaka, Pek-Lan Khong, Thomas von Arx, Michael M Bornstein
OBJECTIVES: The purpose of the present study was to evaluate the frequency, locations, and dimensions of mucous retention cysts of the maxillary sinus and analyze potential associated dental pathology. MATERIALS AND METHODS: A total of 156 cone beam computed tomography (CBCT) scans were included in the analysis, resulting in an evaluation of 310 maxillary sinuses. The presence of mucous retention cysts (MRC) manifesting as dome-shaped radiopacities in the sinus was diagnosed...
September 17, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28920112/implant-and-endodontic-treatment-selection-are-influenced-by-patients-demographic-characteristics-insurance-status-and-medical-history-a-retrospective-cohort-study
#5
Georgios S Chatzopoulos, Larry F Wolff
OBJECTIVE: The aim of this study was to examine any potential association between demographic characteristics, socioeconomic status, dental insurance, and medical and tobacco history between patients that received endodontic treatment or extraction and implant treatment in a university dental clinic. METHOD AND MATERIALS: Dental charts of patients who received root canal treatment and implant therapy were retrieved from the University of Minnesota School of Dentistry records...
2017: Quintessence International
https://www.readbyqxmd.com/read/28920110/painful-neuropathy-caused-by-compression-of-the-inferior-alveolar-nerve-by-focal-osteosclerotic-lesion-of-the-mandible-a-case-report
#6
David Debevc, Tomaž Hitij, Andrej Kansky
Osteosclerotic lesions are a common finding on dental radiographs. They are considered developmental variants of a normal bone architecture and they usually do not need any treatment. The purpose of this article is to present a rare case of osteosclerotic lesion of the mandible causing trigeminal neuropathy by compression of the alveolar nerve. The pain started with dental hypersensitivity of the mandibular right first molar. Later on, signs of irreversible molar tooth pulpitis developed. Endodontic therapy and apicoectomy did not resolve the pain, which later intensified, and painful neuropathy localized to inferior alveolar nerve developed; therefore, surgical decompression was indicated...
2017: Quintessence International
https://www.readbyqxmd.com/read/28918912/evaluation-of-the-root-and-canal-systems-of%C3%A2-maxillary-molars-in-taiwanese-patients-a%C3%A2-cone%C3%A2-beam-computed-tomography-study
#7
Yu-Hua Lin, Hsiu-Na Lin, Chien-Chih Chen, May-Show Chen
BACKGROUND: This study evaluated variations in root canal configuration in the maxillary permanent molars of Taiwanese patients by analyzing patients' cone beam computed tomography (CBCT) images. Comparisons were made among these configurations and those previously reported. This information may serve as a basis for improving the success rate of endodontic treatment. METHODS: The root canal systems of 114 Taiwanese patients with bilateral maxillary first or second molars were examined using CBCT images...
August 2017: Biomedical Journal
https://www.readbyqxmd.com/read/28918906/radiotherapy-and-the-tumor-microenvironment-the-macro-picture
#8
EDITORIAL
Emma Louise Walton
In this issue of the Biomedical Journal, we explore the inner workings of tumor-associated macrophages and seek to understand how these cells can boost or limit the efficacy of radiotherapy, depending on the context. We also highlight a study revealing that staffing patterns in the intensive care unit may affect the outcome of patients with severe sepsis. Finally, we learn how an advanced imaging technique can improve endodontic treatment planning.
August 2017: Biomedical Journal
https://www.readbyqxmd.com/read/28916389/removal-and-killing-of-multispecies-endodontic-biofilms-by-n-acetylcysteine
#9
Young-Suk Choi, Cheul Kim, Ji-Hoi Moon, Jin-Yong Lee
Removal of bacterial biofilm from the root canal system is essential for the management of endodontic disease. Here we evaluated the antibacterial effect of N-acetylcysteine (NAC), a potent antioxidant and mucolytic agent, against mature multispecies endodontic biofilms consisting of Actinomyces naeslundii, Lactobacillus salivarius, Streptococcus mutans and Enterococcus faecalis on sterile human dentin blocks. The biofilms were exposed to NAC (25, 50 and 100mg/mL), saturated calcium hydroxide or 2% chlorhexidine solution for 7 days, then examined by scanning electron microscopy...
September 2, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28916203/working-length-determination-and-instrumentation-at-the-same-time-reduces-average-pain-24-hours-after-endodontic-treatment-compared-with%C3%A2-separate-working-length-determination-and-instrumentation
#10
Romina Brignardello-Petersen
No abstract text is available yet for this article.
September 9, 2017: Journal of the American Dental Association
https://www.readbyqxmd.com/read/28914253/mineral-trioxide-aggregate-induced-apical-closure-in-nonvital-immature-permanent-maxillary-incisor
#11
Meenu Bhola, Virinder Goyal, Parimala Tyagi, Tarun Kumar
Treatment of nonvital immature permanent teeth with calcium hydroxide is associated with few difficulties such as weakened tooth root, root canal reinfection, and long treatment time. Mineral trioxide aggregate (MTA) apical plug method is an alternative treatment method for open apices and has gained popularity in the recent times. This case report describes the management of a late-referral case of periapically involved, traumatized immature permanent incisor by endodontic treatment and the use of MTA apical plug...
October 2017: Journal of the Indian Society of Pedodontics and Preventive Dentistry
https://www.readbyqxmd.com/read/28906503/release-of-irretrievable-abutment-healing-caps-using-cooling-proof-of-concept-and-clinical-recommendations
#12
Kifah Blal, Ori Rimon, Nardy Casap
PURPOSE: To study the relation between irretrievable abutment healing caps (AHCs), temperature, and the torque required to remove the AHCs from implants. MATERIALS AND METHODS: Twenty implants, 13 mm long and 4.2 mm in diameter, were inserted into four acrylic boxes and covered with acrylic resin. An AHC was screwed into each implant, using a 30 N/cm torque. The acrylic blocks were placed in a 37°C water bath, and subsequently, a block was removed from the bath, the AHCs were cooled, and the torque needed to release each AHC from the implant was measured using a torque wrench...
September 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28905412/long-term-treatment-costs-for-aggressive-periodontitis-in-a-german-population
#13
Falk Schwendicke, Anne Sophie Biffar, Christian Graetz
AIM: This study assessed the long-term annual costs for treating aggressive periodontitis (AgP) patients. METHODS: A cohort of compliant AgP patients was retrospectively evaluated. Costs for active periodontal therapy (APT, including scaling and root planning, open flap debridement, root resections, but not pocket-elimination or regenerative surgery) and supportive periodontal therapy (SPT, including also costs for restorative, endodontic, prosthetic and surgical treatments) were estimated from a mixed payer-perspective in Germany...
September 14, 2017: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/28904947/sodium-hypochlorite-irrigation-and-its-effect-on-bond-strength-to-dentin
#14
REVIEW
Tariq S Abuhaimed, Ensanya A Abou Neel
Effective shaping and cleaning of root canals are essential for the success of endodontic treatment. Due to the complex anatomy of root canal spaces, the use of various instrumentation techniques alone is not effective in producing bacteria-free root canal spaces. Irrigation, disinfectants, rinses, and intervisit medications are used in conjunction with the mechanical instrumentation to ensure the success of endodontic treatment. Sodium hypochlorite (NaOCl), a halogenated compound, is routinely used to irrigate the root canal during endodontic treatments...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28902236/should-my-composite-restorations-last-forever-why-are-they-failing
#15
Flávio Fernando Demarco, Kauê Collares, Marcos Britto Correa, Maximiliano Sergio Cenci, Rafael Ratto de Moraes, Niek Johannes Opdam
Composites resins have become the first choice for direct anterior and posterior restorations. The great popularity is related to their esthetic appearance and reduced need of sound tissue removal as compared with former treatments. Several studies have demonstrated that composite restorations may last long in clinical service. In this review we discuss the factors playing a role on the long-term longevity. Composite restorations have demonstrated a good clinical performance with annual failure rates varying from 1% to 3% in posterior teeth and 1% to 5% in anterior teeth...
August 28, 2017: Brazilian Oral Research
https://www.readbyqxmd.com/read/28894386/oxidative-stress-in-patients-with-endodontic-pathologies
#16
Veiko Vengerfeldt, Reet Mändar, Mare Saag, Anneli Piir, Tiiu Kullisaar
BACKGROUND: Apical periodontitis (AP) is an inflammatory disease affecting periradicular tissues. It is a widespread condition but its etiopathogenetic mechanisms have not been completely elucidated and the current treatment options are not always successful. PURPOSE: To compare oxidative stress (OxS) levels in the saliva and the endodontium (root canal [RC] contents) in patients with different endodontic pathologies and in endodontically healthy subjects. PATIENTS AND METHODS: The study group of this comparison study included 22 subjects with primary chronic apical periodontitis (pCAP), 26 with posttreatment or secondary chronic apical periodontitis (sCAP), eight with acute periapical abscess, 13 with irreversible pulpitis, and 17 healthy controls...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28893717/secondary-surgical-decompression-of-the-inferior-alveolar-nerve-after-overfilling-of-endodontic-sealer-into-the-mandibular-canal-case-report-and-literature-review
#17
Anne-Victoire Bastien, Jérôme Adnot, Hervé Moizan, Émile Calenda, Olivier Trost
The authors report the case of a 43 year-old woman who underwent endodontic treatment of the right second mandibular molar with substantial extrusion of endodontic material into the mandibular canal. The patient presented at the Department of Oral and Maxillofacial Surgery with a persistent total anaesthesia of the lower lip and chin after two months. 2D panoramic view and 3D CT-scan examination highlighted the overfilling into the mandibular canal with a more than 50% stenosis of the canal and a consequently significant compression of the dental pedicle...
September 8, 2017: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28893051/permanent-maxillary-central-incisor-with-dilacerated-crown-and-root-and-c-shaped-root-canal
#18
Vikas Allwani, Mansing Pawar, Ajinkya Pawar, Sayed Abrar, Sangeeta Ambhore
Dilaceration is a rare disturbance in traumatised permanent teeth, which constitutes about 3% of the injuries to developing teeth. It usually occurs as a result of trauma to the deciduous predecessors and results in non axial displacement of the already formed hard tissue portion of the developing crown. Endodontic treatment of such teeth presents a challenge to clinicians, and careful management is required to successfully address the root canal anatomy and other possible variations. The C-shaped canal configuration is most frequently seen in mandibular second molars, but this variation may also occur in mandibular first molars, mandibular third molars, maxillary molars, mandibular first premolars, and even in maxillary lateral incisors, with rare reports of such variations occurring in the maxillary central incisors...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28891547/classification-of-alveolar-bone-destruction-patterns-on-maxillary-molars-by-using-cone-beam-computed-tomography
#19
G Ozcan, A E Sekerci
OBJECTIVE: The defective diagnosis of alveolar structures is one of most serious handicaps when assessing available periodontal treatment options for the prevention of tooth loss. The aim of this research was to classify alveolar bone defects in the maxillary molar region which is a challenging area for dental implant applications. To our knowledge, this is the first study of periodontal bone defect prevalence by using cone-beam computed tomography (CBCT). MATERIALS AND METHODS: In this study, the remaining alveolar bone patterns of 669 maxillary molars of 243 patients with periodontal bone loss were investigated on four aspects and the furcation areas of teeth, and then they were classified into six main groups...
August 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/28891221/comparative-analysis-of-the-biological-effects-of-the-endodontic-bioactive-cements-mta-angelus-mta-repair-hp-and-neomta-plus-on-human-dental-pulp-stem-cells
#20
C J Tomás-Catalá, M Collado-González, D García-Bernal, R E Oñate-Sánchez, L Forner, C Llena, A Lozano, P Castelo-Baz, J M Moraleda, F J Rodríguez-Lozano
AIM: To evaluate the biological effects in vitro of MTA Angelus (MTA-Ang; Angelus, Londrina, PR, Brazil), MTA Repair HP (MTA-HP; Angelus,) and NeoMTA Plus (NeoMTA-P; Avalon Biomed Inc, Bradenton, FL, USA) on human dental pulp stem cells (hDPSCs). METHODOLOGY: Cell viability and cell migration assays were performed using eluates of each material. To evaluate cell morphology and cell attachment to the different materials, hDPSCs were directly seeded onto the material surfaces and analyzed by immunocytofluorescence and scanning electron microscopy, respectively...
September 11, 2017: International Endodontic Journal
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