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https://www.readbyqxmd.com/read/28808640/light-emitting-diode-assessment-of-dentinal-defects-the-role-of-presumed-extraction-forces
#1
Marcelo Santos Coelho, Steven J Card, Peter Z Tawil
OBJECTIVES: The evaluation of iatrogenic dentinal defects in extracted teeth may be influenced by extraction forces and prolonged dry times. The purpose of this study was to compare the presence of dentinal defects in freshly extracted, periodontally compromised teeth with those in a group of teeth with uncontrolled extraction forces and storage time. MATERIALS AND METHODS: The experimental group consisted of eighteen roots obtained from teeth extracted due to periodontal reasons with class II or III mobility...
August 2017: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/28808636/in-vivo-assessment-of-accuracy-of-propex-ii-root-zx-ii-and-radiographic-measurements-for-location-of-the-major-foramen
#2
Fernanda Garcia Tampelini, Marcelo Santos Coelho, Marcos de Azevêdo Rios, Carlos Eduardo Fontana, Daniel Guimarães Pedro Rocha, Sergio Luiz Pinheiro, Carlos Eduardo da Silveira Bueno
OBJECTIVES: The aim of this in vivo study was to assess the accuracy of 2 third-generation electronic apex locators (EALs), Propex II (Dentsply Maillefer) and Root ZX II (J. Morita), and radiographic technique for locating the major foramen (MF). MATERIALS AND METHODS: Thirty-two premolars with single canals that required extraction were included. Following anesthesia, access, and initial canal preparation with size 10 and 15 K-flex files and SX and S1 rotary ProTaper files, the canals were irrigated with 2...
August 2017: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/28808472/successful-ultra-conservative-management-of-a-mandibular-premolar-with-dens-invaginatus
#3
Ramin Abazarpour, Masoud Parirokh, Aida Farhadi, Zahra Jalali, Nasir Kheirabadi
Dens invaginatus is one of the most common anomalies of tooth structure. It is caused by the invagination of the crown surface during odontogenesis that enters the pulp chamber of the affected tooth. Depending on the complexity of invagination, the tooth might present with pulp necrosis, open apex and a complicated root canal system. This case report presents an Oehlers' type 2 dens-invaginatus in a mandibular premolar with chronic apical abscess. In most cases, dens invaginatus is removed during treatment...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28808470/non-surgical-retreatment-of-maxillary-lateral-incisor-with-unusual-anatomy-a-case-report-and-mini-review
#4
Ashraf Shubbar, Behnam Bolhari, Nooshin Fakhari, Parvin Alemi, Ali Nosrat
Knowledge about internal anatomy plays a crucial role in the success of the root canal treatment. Many studies on internal anatomy have repeatedly reported that maxillary lateral incisors have only one canal. The primary aim of this article was to describe successful non-surgical retreatment of a permanent maxillary lateral incisor with two root canals and open apices. The treatment was carried out using dental operating microscope and the canals were obturated with mineral trioxide aggregate (MTA) as an apical plug...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28808468/treatment-of-a-maxillary-second-molar-with-one-buccal-and-two-palatal-roots-confirmed-with-cone-beam-computed-tomography
#5
Masoud Parirokh, Mahsa Razifar, Hamed Manochehrifar, Paul V Abbott, Nima Hatami, Nargessaddat Kashi, Aida Farhadi
Root canal configuration is an important subject in endodontic practice and dentists should be familiar with all possible types of root canal configuration. A forty-three year old male was referred for root canal treatment of his maxillary left second molar tooth with symptomatic irreversible pulpitis. Pre-operative radiographs showed a three rooted molar. However, after access cavity preparation two palatal and one buccal orifices were detected. The patient was informed of the unusual root canal anatomy and cone-beam computed tomography (CBCT) was ordered for precise evaluation of the anatomy...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28808466/apical-microleakage-in-root-canals-containing-broken-rotary-instruments
#6
Mostafa Godiny, Reza Hatam, Atefeh Khavid, Shahryar Khanlari
INTRODUCTION: Broken instruments in root canals complicate routine endodontic treatment. This study aimed to compare apical microleakage in root canals containing broken rotary instruments filled with mineral trioxide aggregate (MTA), calcium-enriched mixture (CEM) cement, laterally compacted gutta-percha and injected gutta-percha. METHODS AND MATERIALS: In this in vitro, experimental study, 80 extracted human premolars were decoronated and then the roots were randomly divided into four groups (n=20)...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28808463/micro-push-out-bond-strength-and-bioactivity-analysis-of-a-bioceramic-root-canal-sealer
#7
Ceci Nunes Carvalho, Renata Grazziotin-Soares, George Táccio de Miranda Candeiro, Luis Gallego Martinez, Juliana Pereira de Souza, Patrícia Santos Oliveira, José Bauer, Giulio Gavini
INTRODUCTION: Bioactive endodontic sealers have been developed to improve the quality of root canal obturation. EndoSequence Bioceramic (BC) Sealer is amongst calcium silicate-based materials recently developed for permanent root canal filling. The objective of this study was to evaluate the bioactivity of BC Sealer and its micro push-out bond strength to dentin compared to AH-Plus (AH) sealer. METHODS AND MATERIALS: To perform the micro push-out test, 24 root canals of mandibular premolars were instrumented and divided into two groups (n=12)...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28808461/the-effect-of-calcium-chloride-on-push-out-bond-strength-of-calcium-enriched-mixture-cement-and-mineral-trioxide-aggregate
#8
Mohammad Mehdi Shokouhi, Abbas Abbaszadegan, Amin Ameri, Seyed Masih Sharifian, Mohammadreza Nabavizadeh
INTRODUCTION: This in vitro study investigated the effect of adding 10% calcium chloride (CaCl2) on push out bond strength of calcium-enriched mixture (CEM) cement and mineral trioxide aggregate (MTA) to root canal dentin. METHODS AND MATERIALS: A total of 120 root dentin slices with 2 mm thickness were prepared from sixty single-rooted human teeth. Dentinal discs were enlarged to achieve 1.3 mm diameter. The specimens were randomly allocated into eight groups (n=15)...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28808459/evaluation-of-apically-extruded-debris-during-root-canal-retreatment-using-protaper-next-and-reciproc-in-severely-curved-canals
#9
Giselle Nevares, Kaline Romeiro, Diana Albuquerque, Felipe Xavier, Howard Fogel, Laila Freire, Rodrigo Cunha
INTRODUCTION: To compare the apical extrusion of debris produced during root obturating material removal from severely curved root canals using either Reciproc (REC) or ProTaper Next (PTN) systems. METHODS AND MATERIALS: Twenty-six mesial canals of lower molars were instrumented, filled and allocated into two groups (n=13). Micro-computed tomographic images were performed to determine the root canal configuration (Vertucci's type IV) and initial volume of obturation...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28808458/effect-of-propylene-glycol-on-the-sealing-ability-of-mineral-trioxide-aggregate-and-calcium-enriched-mixture-cement-apical-barriers
#10
Alireza Adl, Fereshte Sobhnamayan, Nooshin Sadat Shojaee, Fateme Tahmasebi Azad, Mohsen Bahmani
INTRODUCTION: Propylene glycol (PG) improves the handling, physical, and chemical properties of mineral trioxide aggregate (MTA). This study aimed to evaluate the effect of PG on the sealing ability of MTA and calcium-enriched mixture (CEM) apical barriers. METHODS AND MATERIALS: A total of 70 extracted human maxillary single-rooted teeth were prepared using ProTaper rotary system. The apical 3 mm of the root tips were resected and the root canals were enlarged with Peeso reamers up to #4, to create open apex teeth...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28808456/an-in-vitro-comparison-of-apically-extruded-debris-using-reciproc-protaper-universal-neolix-and-hyflex-in-curved-canals
#11
Hossein Labbaf, Kiumars Nazari Moghadam, Shahriar Shahab, Mahshid Mohammadi Bassir, Mohammad Amin Fahimi
INTRODUCTION: As a consequence of root canal preparation, dentinal chips, irrigants and pulp remnants are extruded into preradicular space. This phenomenon may lead to post endodontic flare-ups. The purpose of this study was to compare the amount of extruded debris with four endodontic NiTi engine-driven systems. METHODS AND MATERIALS: Sixty mesiobuccal roots of maxillary molars with 15-30˚ curvature were divided randomly into four groups (n=15). Each group was instrumented up to apical size of 25 using Reciproc, ProTaper Universal, Neolix and Hyflex...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28808455/effect-of-nickel-chromium-and-non-precious-gold-color-alloy-cast-posts-on-fracture-resistance-of-endodontically-treated-teeth
#12
Fatemeh Gholami, Parisa Kohani, Shima Aalaei
INTRODUCTION: Root canal-treated teeth are weaker than vital teeth and are more susceptible to fractures. Therefore, special precautions should be adhered to, such as the use of various types of cast or prefabricated posts. Regarding the effect of post material on fracture resistance of teeth, the aim of this in vitro study was to evaluate the effect of non-precious gold color alloy (NPG) and nickel-chrome (Ni-Cr) cast posts on resistance of endodontically treated teeth. METHODS AND MATERIALS: In this study, 30 freshly extracted single-rooted premolar teeth were randomly divided into two groups...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28808454/concurrent-effects-of-bleaching-materials-and-the-size-of-root-canal-preparation-on-cervical-dentin-microhardness
#13
Maryam Kazemipoor, Shaghayegh Azad, Farnaz Farahat
INTRODUCTION: The aim of the present study was to evaluate the concurrent effect of root canal preparation size and intra coronal bleaching on dentin microhardness. METHODS AND MATERIALS: Seventy-two intact anterior teeth were root canal treated and randomly divided into two groups (n=36) according to the size of coronal root canal preparation. The coronal portions of the canals were then enlarged with #2 and 4 Peeso reamers, respectively. Following root canal obturation, teeth were assigned into three groups (n=12) to be treated with bleaching agents containing 35% hydrogen peroxide (HP), sodium perborate (SP) and distilled water as control group...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28808452/root-morphology-and-canal-configuration-of-first-and-second-maxillary-molars-in-a-selected-iranian-population-a-cone-beam-computed-tomography-evaluation
#14
Abbasali Khademi, Asieh Zamani Naser, Zahra Bahreinian, Mojdeh Mehdizadeh, Mojtaba Najarian, Saber Khazaei
INTRODUCTION: The aim of this investigation was to evaluate root canal morphology of maxillary first and second molars and also to assess the prevalence and morphology of the second mesiobuccal canal (MB2) in these teeth, using cone-beam computed tomography (CBCT). METHODS AND MATERIALS: In this cross-sectional study, the total of 470 CBCT images from the archive of Radiology Department of Isfahan University of Medical Sciences (IUMS), Iran, was evaluated and 295 images were selected...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28804934/complicated-untreated-apical-periodontitis-causing-paraesthesia-a-case-report
#15
Domenico Ricucci, Simona Loghin, José F Siqueira
The purpose of this article was to report a case of untreated apical periodontitis resulting in severe late complications. A patient with an asymptomatic crowned root canal-treated mandibular molar revealing a radiographic substandard endodontic treatment and a slight periapical radiolucency was made aware of the treatment options and opted for no treatment. The lesion slightly increased in size after 6 years, but the tooth remained asymptomatic and endodontic retreatment was again refused. After 4 more years, the patient presented with an abscess and severe pain, complicated by paraesthesia of the left chin and lip...
August 14, 2017: Australian Endodontic Journal: the Journal of the Australian Society of Endodontology Inc
https://www.readbyqxmd.com/read/28804693/the-ability-of-reciproc-instruments-to-reach-full-working-length-without-glide-path-preparation-a-clinical-retrospective-study
#16
Andreas Bartols, Bernt-Peter Robra, Winfried Walther
BACKGROUND: Reciproc instruments are the only contemporary root canal instruments where glide path preparation is no longer strictly demanded by the manufacturer. As the complete preparation of root canals is associated with success in endodontic treatment we wanted to assess the ability and find predictors for Reciproc instruments to reach full working length (RFWL) in root canals of maxillary molars in primary root canal treatment (1°RCTx) and retreatment (2°RCTx) cases. METHODS: This retrospective study evaluated 255 endodontic treatment cases of maxillary molars...
2017: PeerJ
https://www.readbyqxmd.com/read/28803674/healing-of-apical-periodontitis-after-nonsurgical-treatment-in-patients-with-type-2-diabetes
#17
Suman Arya, Jigyasa Duhan, Sanjay Tewari, Pankaj Sangwan, Veena Ghalaut, Sameer Aggarwal
INTRODUCTION: The purpose of this prospective study was to compare the success of primary root canal treatment between type 2 diabetic and nondiabetic patients and to investigate the effect of periapical healing on glycated hemoglobin (HbA1c) in type 2 diabetic patients with apical periodontitis. METHODS: Sixty mandibular molars with necrotic pulps and apical radiolucency (size ≥ 2 mm × 2 mm) were included in the study. Based on the HbA1c levels, patients were divided into 2 groups: type 2 diabetic (HbA1c ≥6...
August 10, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28801267/primum-non-nocere-the-effects-of-sodium-hypochlorite-on-dentin-as-used-in-endodontics
#18
Li-Sha Gu, Xue-Qing Huang, Brandon Griffin, Brian R Bergeron, David H Pashley, Li-Na Niu, Franklin R Tay
The medical literature is replete with the maxim 'primum non nocere', cautioning health care providers to avoid doing any harm to human subjects in their delivery of medical care. Sodium hypochlorite (NaOCl) is a well-established irrigant for root canal treatment because of its antimicrobial and organic tissue remnant dissolution capability. However, little is known about the deleterious effect of this strong oxidizing agent on the integrity of human mineralized dentin. Iatrogenically-induced loss of dentin integrity may precipitate post-treatment root fracture and has potential medico-legal complications...
August 8, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28800075/biofilms-in-endodontics-current-status-and-future-directions
#19
REVIEW
Prasanna Neelakantan, Monica Romero, Jorge Vera, Umer Daood, Asad U Khan, Aixin Yan, Gary Shun Pan Cheung
Microbiota are found in highly organized and complex entities, known as biofilms, the characteristics of which are fundamentally different from microbes in planktonic suspensions. Root canal infections are biofilm mediated. The complexity and variability of the root canal system, together with the multi-species nature of biofilms, make disinfection of this system extremely challenging. Microbial persistence appears to be the most important factor for failure of root canal treatment and this could further have an impact on pain and quality of life...
August 11, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28796346/fracture-of-nickel-titanium-rotary-instrument-during-root-canal-treatment-and-re-treatment-a-5-year-retrospective-study
#20
K Alfouzan, A Jamleh
AIM: To evaluate retrospectively the incidence of K3 nickel titanium rotary instrument fracture in referred cases during root canal treatment and re-treatment. METHODOLOGY: Clinical and radiographic reports of 12867 endodontic cases treated at the King Abdulaziz medical city between January 2010 and November 2015 were reviewed to obtain information on intra-canal fractured instruments with respect to the treatment performed, tooth type, and the size and at what level the instrument fractured (coronal, middle or apical)...
August 10, 2017: International Endodontic Journal
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