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https://www.readbyqxmd.com/read/29703402/fe-analysis-of-conceptual-hybrid-composite-endodontic-post-designs-in-anterior-teeth
#1
Antonio Gloria, Saverio Maietta, Massimo Martorelli, Antonio Lanzotti, David C Watts, Pietro Ausiello
OBJECTIVES: To assess conceptual designs of dental posts consisting of polyetherimide (PEI) reinforced with carbon (C) and glass (G) glass fibers in endodontically treated anterior teeth. METHODS: 3D tessellated CAD and geometric models of endodontically treated anterior teeth were generated from Micro-CT scan images. Model C-G/PEI composite posts with different Young's moduli were analyzed by Finite Element (FE) methods post A (57.7GPa), post B (31.6GPa), post C (from 57...
April 24, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29676971/conservative-treatment-of-a-complicated-crown-root-fracture-using-adhesive-fragment-reattachment-and-composite-resin-restoration-two-year-follow-up
#2
A V Martins, R C Albuquerque, L D Lanza, Ê L Vilaça, Nrfa Silva, A N Moreira, R R da Silveira
Crown-root fracture is one of the most challenging fracture types in the dental traumatology literature. Traumatized anterior teeth require quick functional and esthetic repair. In the case of a complex crown fracture of the maxillary left central incisor, requiring endodontic treatment, a fiber-reinforced post was used to create a central support stump to restore the dental morphology. This report describes the clinical procedures involved in the treatment. After two years of follow-up, the clinical and radiographic findings demonstrated that the adopted clinical protocol was successful and yielded healthy periodontal tissues with no signs of periradicular pathology...
May 2018: Operative Dentistry
https://www.readbyqxmd.com/read/29663972/a-multidisciplinary-approach-to-restore-an-unconventional-crown-removal-of-traumatized-permanent-central-incisors
#3
Richard E Campbell, Heather T Morris, Kyle T Reynolds, Elizabeth S Gosnell
A 13-year-old female presented with traumatized maxillary central incisors that had been endodontically treated. Five years later, at a different dental office, she had the clinical crowns removed, leaving subgingival margins. From the patient's history and our initial assessment, it seemed as if the teeth had been fractured and luxated but not avulsed. Endodontic posts with spot-welded orthodontic brackets were temporarily cemented to enable orthodontic extrusion. Once access to restorable margins was obtained, the temporary posts were removed and conventional fiber posts with interim composite crowns were placed...
January 15, 2018: Journal of Dentistry for Children
https://www.readbyqxmd.com/read/29593161/influence-of-restorative-procedures-on-endodontically-treated-premolars-finite-element-analysis-of-a-ct-scan-based-three-dimensional-model
#4
Tatjana Maravić, Darko Vasiljević, Ivana Kantardžić, Tijana Lainović, Ognjan Lužanin, Larisa Blažić
An endodontically treated tooth with mesial-occlusal-distal (MOD) cavity is often restored with composite resin. Palatal and buccal cusp reduction (MODP, MODPB), and/or fiber-reinforced composite posts (P), are used in an attempt to improve the longevity of the restoration. The aim of this study was to determine the effects of these procedures on von Mises stress values and distribution in dental tissues and restorative materials using finite element analysis. Based on CT scans of an extracted second upper premolar, six 3D endodontically treated tooth models (MOD, MODP, MODPB, MOD+P, MODP+P, MODPB+P) were created...
March 28, 2018: Dental Materials Journal
https://www.readbyqxmd.com/read/29456401/management-of-complicated-crown-fracture-by-reattachment-using-fiber-post-minimal-intervention-approach
#5
Ambar W Raut, Vijay Mantri, Vaibhao I Shambharkar, Mitul Mishra
Anterior crown fractures are a common form of traumatic dental injuries that mainly affect the maxillary incisors, especially in children and adolescents. Complicated crown fractures although less common, pose a challenge to the clinician. The main objective while treating such cases is successful pain management and immediate restoration of function, esthetics and phonetics. Since the development of the adhesive dentistry, the patient's own fragment can be used to restore the fractured tooth. Reattachment of fractured tooth fragments offers a viable restorative alternative...
January 2018: Journal of Natural Science, Biology, and Medicine
https://www.readbyqxmd.com/read/29358537/radiographic-evaluation-of-post-core-restorations-fabricated-by-dental-students-at-jazan-university
#6
Abdullah A Meshni, Mohammed M Al Moaleem, Khurshid A Mattoo, Esam Halboub, Saleh Mh Alharisi, Ali E Shatifi, Saeed A Al Amriee, Nabiel Al Ghazali
AIM: Post and core procedures are important clinical methods in routine dental practice. The present research aimed to radiographically assess the quality of post seating performed by undergraduate students at the College of Dentistry, Jazan University. MATERIALS AND METHODS: A total of 343 periapical X-rays of cemented posts (170 from males and 173 from females) were assessed. The assessment covered tooth type, arch, gender, type of post, length of post in relation to the crown and root lengths, the presence of any abnormality in post space, status of the remaining gutta-percha (GP), and the presence or absence of spaces between the end of post and GP...
January 1, 2018: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28960769/clinical-performance-and-epidemiologic-aspects-of-fractured-anterior-teeth-restored-with-a-composite-resin-a-two-year-clinical-study
#7
Uzay Koc Vural, Arlin Kiremitçi, Saadet Gökalp
PURPOSE: To investigate the etiologic factors, effect of age and gender on dental trauma, and to evaluate the performance of composite resin on the fractured crown of permanent anterior teeth. MATERIALS AND METHODS: Over a 2-year period, 73 permanent teeth from 51 patients with dental trauma were treated with direct composite resin restoration. Informed consent and standardized trauma forms were completed by the patient; teeth were restored with a submicron hybrid composite resin (Spectrum TPH) and respective adhesive system (Prime&Bond NT)...
September 27, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28955597/treatment-approaches-for-traumatized-anterior-teeth-with-excessive-tissue-loss-three-case-reports
#8
Zuhal Yildirim, Omer Yavuz Gomec
Use of direct composite and indirect laminate veneers has been an alternative to metal- and all-ceramic crowns for anterior teeth restorations. Dental traumas are the most common reasons for excessive tissue loss. Treatment options depend on the amount of remaining tissue, the extent of the damage to dental pulp and periapical tissues and the time elapsed before dental treatment. The aim of this case report was to evaluate the direct and indirect techniques used in the treatments of traumatically fractured anterior teeth...
2017: Journal of Istanbul University Faculty of Dentistry
https://www.readbyqxmd.com/read/28936037/comparison-of-resistance-to-fracture-between-three-types-of-permanent-restorations-subjected-to-shear-force-an-in-vitro-study
#9
Ramin Atash, Maiyas Arab, Hadrien Duterme, Sibel Cetik
INTRODUCTION: Our study's objective was to compare resistance to fracture between endocrown and conventional post and core restorations when subjected to shear force. MATERIALS AND METHODS: Thirty human mandibular premolars were extracted for orthodontic reasons, endodontically treated, and restored using three different methods: endocrown, glass fiber post and composite resin core, and metal post. All the crowns were made from IPS e.max ceramic. Shear forces were applied to these restorations using a test machine until breakage...
July 2017: Journal of Indian Prosthodontic Society
https://www.readbyqxmd.com/read/28934683/histological-transformations-of-the-dental-pulp-as-possible-indicator-of-post-mortem-interval-a-pilot-study
#10
Patricio A Carrasco, Claudia I Brizuela, Ismael A Rodriguez, Samuel Muñoz, Marianela E Godoy, Carolina Inostroza
BACKGROUND: The correct estimation of the post mortem interval (PMI) can be crucial on the success of a forensic investigation. Diverse methods have been used to estimate PMI, considering physical changes that occur after death, such as mortis algor, livor mortis, among others. Degradation after death of dental pulp is a complex process that has not yet been studied thoroughly. It has been described that pulp RNA degradation could be an indicator of PMI, however this study is limited to 6 days...
October 2017: Forensic Science International
https://www.readbyqxmd.com/read/28866179/fabrication-and-in-vivo-evaluation-of-hydroxyapatite-carbon-nanotube-electrospun-fibers-for-biomedical-dental-application
#11
A S Khan, A N Hussain, L Sidra, Z Sarfraz, H Khalid, M Khan, F Manzoor, L Shahzadi, M Yar, I U Rehman
The aim was to synthesize bioactive electrospun fibers for biomedical and dental application with improved biocompatibility. In situ precipitation of nano-hydroxyapatite (nHA) was performed with various concentrations (0.5%, 1%, 2%, 3%, and 5% wt/wt) of functionalized multi-walled-carbon nanotubes (MWCNTs) by using microwave irradiation technique. The obtained composites were characterized by Fourier Transform Infrared (FTIR), X-ray Diffraction (XRD), Thermogravimetric Analysis/Differential Scanning Calorimetry (TGA/DSC), and the cylindrical discs were made for mechanical testing...
November 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28862733/load-bearing-capacity-and-fracture-behavior-of-glass-fiber-reinforced-composite-cranioplasty-implants
#12
Jaakko M Piitulainen, Riina Mattila, Niko Moritz, Pekka K Vallittu
BACKGROUND: Glass fiber-reinforced composites (FRCs) have been adapted for routine clinical use in various dental restorations and are presently also used in cranial implants. The aim of this study was to measure the load-bearing capacity and failure type of glass FRC implants during static loading with and without interconnective bars and with different fixation modes. METHODS: Load-bearing capacities of 2 types of FRC implants with 4 different fixation modes were experimentally tested...
November 10, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28861729/a-preliminary-randomized-clinical-trial-comparing-diode-laser-and-scalpel-periosteal-incision-during-implant-surgery-impact-on-postoperative-morbidity-and-implant-survival
#13
RANDOMIZED CONTROLLED TRIAL
Aysan Shahnaz, Raika Jamali, Farnush Mohammadi, Afshin Khorsand, Neda Moslemi, Reza Fekrazad
The aim of this preliminary randomized clinical trial was to compare: (1) post-operative morbidity after application of laser or scalpel incision for flap advancement during implant surgery and bone grafting and (2) implant survival rate following flap advancement with laser or scalpel incision after 6 months of loading. Eighteen patients who were scheduled for dental implant placement and simultaneous bone grafting were randomly assigned to test or control groups. Diode laser (810 nm, 2 W, pulse interval 200 μs; pulse length 100 μs, 400-μm initiated fiber tip), or scalpel (control) was used to sever the periosteum to create a tension-free flap...
January 2018: Lasers in Medical Science
https://www.readbyqxmd.com/read/28771388/post-retained-single-crowns-versus-fixed-dental-prostheses-a-7-year-prospective-clinical-study
#14
M Ferrari, R Sorrentino, J Juloski, S Grandini, M Carrabba, N Discepoli, E Ferrari Cagidiaco
Biomechanical integrity of endodontically treated teeth (ETT) is often compromised. Degree of hard tissue loss and type of final prosthetic restoration should be carefully considered when making a treatment plan. The objective of this prospective clinical trial was to assess the influence of the type of prosthetic restoration as well as the degree of hard tissue loss on 7-y clinical performance of ETT restored with fiber posts. Two groups ( n = 60) were defined depending on the type of prosthetic restoration needed: 1) single unit porcelain-fused-to-metal (PFM) crowns (SCs) and 2) 3- to 4-unit PFM fixed dental prostheses (FDPs), with 1 healthy and 1 endodontically treated and fiber post-restored abutment...
December 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28678974/clinical-performance-and-failure-modes-of-pulpless-teeth-restored-with-posts-a-systematic-review
#15
REVIEW
Ana Maria Estivalete Marchionatti, Vinícius Felipe Wandscher, Marília Pivetta Rippe, Osvaldo Bazzan Kaizer, Luiz Felipe Valandro
The aim of this systematic review was to compare the clinical performance and failure modes of teeth restored with intra-radicular retainers. A search was performed on PubMed/Medline, Central and ClinicalTrials databases for randomized clinical trials comparing clinical behavior and failures of at least two types of retainers. From 341 detected papers, 16 were selected for full-text analysis, of which 9 met the eligibility criteria. A manual search added 2 more studies, totalizing 11 studies that were included in this review...
July 3, 2017: Brazilian Oral Research
https://www.readbyqxmd.com/read/28621273/choice-of-endodontic-fiber-posts-and-its-influence-on-dental-malpractice-an-in-vitro-evaluation
#16
Fouad Ayoub, Houssam Jassar, Hassan El Husseini, Ziad Salameh
AIMS AND OBJECTIVES: The fiber post type used in restoring endodontically treated teeth may affect the dental expert decision in the case of dental malpractice. The aim of this study was to evaluate the low-cost commercial fiber post in comparison with a higher cost or well-known documented fiber post system. MATERIALS AND METHODS: A total of 20 premolars were selected for the study; following endodontic treatment, specimens were randomly divided into two groups of 10 specimens each according to the type of fiber post used: (1) Low-cost commercial fiber post (OYAPost, Taper Lucent, OYARICOM) and (2) higher cost well-known fiber post (Rely X Fiber post, 3M ESPE)...
June 1, 2017: Journal of Contemporary Dental Practice
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
#17
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...
August 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28566672/effects-of-various-etching-protocols-on-the-flexural-properties-and-surface-topography-of-fiber-reinforced-composite-dental-posts
#18
Juthatip Aksornmuang, Chanya Chuenarrom, Natjira Chittithaworn
The purpose of this study was to evaluate the flexural properties and surface topography of fiber posts surface-treated with various etching protocols. Seventy each of three types of fiber posts: RelyX Fiber Post, Tenax Fiber Trans, and D.T. Light-Post Illusion X-Ro, were randomly divided into 7 groups: no surface treatment, surface treated with hydrofluoric acid (HF) 4.5% for 60 s, HF 4.5% for 120 s, HF 9.6% for 15 s, HF 9.6% for 60 s, HF 9.6% for 120 s, and treated with H2 O2 24% for 10 min. The specimens were then subjected to a three-point bending test...
September 26, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28503478/the-effects-of-non-thermal-plasma-and-conventional-treatments-on-the-bond-strength-of-fiber-posts-to-resin-cement
#19
Maíra do Prado, Eduardo Moreira da Silva, Juliana das Neves Marques, Caroline Brum Gonzalez, Renata Antoun Simão
OBJECTIVES: This study compared the effect of hexamethyldisiloxane (HMDSO) and ammonia (NH3) plasmas on the bond strength of resin cement to fiber posts with conventional treatments. MATERIALS AND METHODS: Sixty-five fiber posts were divided into 5 groups: Control (no surface treatment); H2O2 (24% hydrogen peroxide for 1 min); Blasting (blasting with aluminum oxide for 30 sec); NH3 (NH3 plasma treatment for 3 min); HMDSO (HMDSO plasma treatment for 15 min). After the treatments, the Ambar adhesive (FGM Dental Products) was applied to the post surface (n = 10)...
May 2017: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/28434685/influence-of-inhomogeneous-dental-posts-on-stress-distribution-in-tooth-root-and-interfaces-three-dimensional-finite-element-analysis
#20
Mojtaba Mahmoudi, Ali Reza Saidi, Parviz Amini, Maryam Alsadat Hashemipour
STATEMENT OF PROBLEM: In post-and-core crown restorations, the use of flexible posts concentrates stresses at the dentin and the use of stiff posts concentrates stresses at the interfaces. A class of inhomogeneous materials (called functionally graded materials) has been proposed for posts to resolve the weaknesses of both flexible and rigid posts. PURPOSE: The purpose of this in vitro study was to design an inhomogeneous post and investigate its influence on the stress distribution of post-and-core crown restorations...
December 2017: Journal of Prosthetic Dentistry
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