Reham Hassan

• PhD of Endodontics, Cairo University
• Professor (Full) at Egyptian Russian University

Objectives The push-out bond strength to the intraradicular dentin was evaluated in this in vitro study using an epoxy-based endodontic sealer loaded with silver-gold nanoparticles. Additionally, the benefits of using the nanoparticles as a canal pretreatment before applying the sealer were evaluated in comparison to using the sealer alone. Method...

Background Disinfection of the root canal system is a challenge to all clinicians, calcium hydroxide Ca(OH)2, one of the most popular intracanal medications used for this purpose, has some unwanted effects on dentine. This study aimed to investigate the antibiofilm effect of Nanochitosan (CSNPs) and Calcium hydroxide Ca(OH)2 intra canal medications...

The present study evaluated the incidence of apical cracks after root canal obturation using lateral and vertical compaction techniques. A total of 20 human mandibular single rooted premolars were used and instrumentation was done using EdgeEndo files up to 40 taper 4%. Samples were randomly divided into two groups (n = 10) according to the obturat...

Background Enhancing the antibacterial capabilities of dental materials by adding nanoparticles has been the subject of some research. However, the potential toxic effect of this material on the vital tissues should be investigated to avoid additional damage to the tissue. Objective This study aimed to validate the long-term cytotoxic and antibact...

Vaccines, like the Corona Virus Disease-2019 (COVID-19) vaccines, can control diseases, but vaccine hesitancy reduces their use. It is important to assess the intention to use COVID-19 vaccines boosters and the determinants of this intention to help in developing programs to promote the uptake of boosters. An online survey collected data from adult...

The purpose of this study was to analyse the social media activity related to endodontic research over the last 10-years. All research articles published in endodontic journals listed in Scopus (Sc) published in 2012 and 2018 were included in our study. The Altmetric Attention Score (AAS), Twitter, and Facebook mentions were obtained for each artic...

The purpose of this study was to analyse the social media activity related to endodontic research over the last 10‐years. All research articles published in endodontic journals listed in Scopus (Sc) published in 2012 and 2018 were included in our study. The Altmetric Attention Score (AAS), Twitter, and Facebook mentions were obtained for each artic...

Objective This study evaluated the effect of the XP-Endo Finisher (XPF), passive ultrasonic irrigation (PUI) and conventional irrigation using side-vented needle (SVN) on the amount of apically extruded debris and canal cleanliness following the removal of double antibiotic paste (DAP) from immature root canal models. Material and methods Forty-ei...

Background The maternal diet is essential to offspring development, but the specific effects on tooth morphology are still unknown. The aim of this study was to evaluate the effects of altering maternal calcium (Ca) and phosphorus (P) supplementation during gestation and lactation on offspring dentition. Methods Pregnant mice were fed an experimen...

Background This study aimed to evaluate the effect of various irrigation protocols on the penetration depth of a calcium silicate–based sealer into dentinal tubules using confocal laser scanning microscopy (CLSM). Methods Twenty single-rooted mandibular premolars were endodontically prepared and divided into the following two groups according to t...

Objective: To evaluate the financial impact of the COVID-19 pandemic on endodontic clinics in Egypt. Methods: Two hundred Egyptian endodontists holding a minimum of a master's degree were invited to participate in an online survey in March 2021. Participants accessed the survey link shared on the social media group of the Egyptian Society of Endodo...

BSTRACT Objective: The aim of the study was to compare the cleaning efficiency of XP Finisher (FKG Dentaire, La Chaux-de-Fonds, Switzerland), XP Finisher R (FKG Dentaire), and passive ultrasonic irrigation after root canal retreatment. Methods: A total of 75 single-rooted human teeth were decoronated, instrumented using HyFlex EDM rotary files (Col...

Objective This study compared the quantity of extruded debris after instrumentation with TRUShape 3D Conforming files, TruNatomy files, and the WaveOne Gold reciprocating system. Materials and methods Fifty-one mesiobuccal canals with severe curvatures (25–40°) were assigned to three equal groups according to the rotary system used for preparation...

Abstract Objectives: This study was aimed to evaluate the cause‐effect relationship between canal preparation with ProTaper Next (PTN) and ProTaper Gold (PTG) using optimum torque reverse (OTR) motion or continuous rotation and dentinal crack formation. Materials and Methods: Fifty distobuccal roots of human maxillary first molars were divided into...

Aim This preliminary randomised, prospective, controlled trial aimed to compare the clinical and radiographic outcomes of two regenerative endodontic procedures (REPs), revitalisation and a platelet-rich fibrin (PRF)-based technique, in the treatment of mature permanent teeth with necrotic pulps. Methodology The trial has been reported according t...

Objectives: To evaluate the perceptions of clinical dental students on the role of online education in providing dental education during the COVID-19 crisis. Materials and Methods: A cross-sectional online survey was sent to four Egyptian dental schools from the 20th of January 2021 to the 3rd of February 2021. Survey questions included the demogra...

AIM: The aim of the study was to evaluate and compare the effect of different access cavity designs, using cone-beam computed tomography (CBCT), on root canal transportation, and centralization performed on two rooted maxillary premolars. METHODS: Twenty maxillary premolars were randomly divided into two groups. In Group 1, traditional endodontic c...

Background The interaction between the root canal system and the oral cavity caused by iatrogenic perforations significantly affects the treatment outcome and tooth survival. Objectives This study was directed to compare the biocompatibility of an experimental tricalcium phosphate cement versus biodentine and mineral Trioxide aggregate used for fu...

AIM: This study aimed to compare the effect of XP-endo Finisher file (XPF), passive ultrasonic irrigation (PUI) and conventional irrigation technique using side-vented needle (SVN) on the amount of apically extruded debris after the removal of calcium hydroxide Ca(OH) 2 and double antibiotic paste (DAP). MATERIALS AND METHODS: Sixty extracted human...

Preserving the original canal anatomy is an important parameter when testing any file system, the aim of this study was to investigate the shaping ability of three single file rotary systems using cone beam computed tomography (CBCT). Mesio-buccal canals from sixty human permanent mandibular first molars were scanned using CBCT to detect the canal...

BACKGROUND: Recently, new calcium silicate bioceramic sealers were introduced to the market. The selection of root canal sealers should not only be based on the different physical parameters but also on local biocompatibility and tissue tolerance. AIM: This study aimed to evaluate and compare the in-vivo biocompatibility of a BioRoot RCS in paralle...

The aim of the present study was to investigate the shaping abilities of XP Shaper and compare it with other single file rotary NiTi systems utilizing full rotation and reciprocation motion, by cone beam computed tomography. Mesiobuccal canals of forty-five mandibular first molars, were allocated into three equal groups (n=15) according to the rota...

Aim: The aim of this study was to investigate the effect of a silver nanoparticle intracanal medicament on root canal dentine microhardness compared with calcium hydroxide. Materials and methods: Silver nanoparticles were prepared and characterised using an optical spectrophotometer and a transmission electron microscope. A total of 60 teeth were...

Comparison of the effect of different orifice openers on the cervical dentine thickness of mesiobuccal root canals of mandibular molars: a cone beam computed tomography (CBCT) study Key words cervical flaring, cone-beam computed tomography (CBCT), dentine thickness, orifice opener, root canal instruments Objective: The aim of this study was to comp...

Regenerative endodontics is a promising alternative therapy for teeth with open apices and necrotic pulps. The present study was performed to evaluate radiographically revascularization-induced maturogenesis of non-vital immature teeth using platelets rich plasma (PRP) compared to blood clot as a scaffold. Methods: Immature necrotic permanent maxil...

Comparison of the effect of different orifice openers on the cervical dentine thickness of mesiobuccal root canals of mandibular molars: a cone beam computed tomography (CBCT) study Key words cervical flaring, cone-beam computed tomography (CBCT), dentine thickness, orifice opener, root canal instruments Objective: The aim of this study was to comp...

The aim of the present study was to prepare and characterize silver nanoparticles AgNPs paste as intra canal medication and compare its antimicrobial activity against calcium hydroxide Ca(OH)2 paste. Twenty patients with necrotic pulp tissues were divided into 2 groups according to the type of medicament used. Two microbiological samples were taken...

Abstract: Objective: The aim of this study was to compare the effect of four instruments used as orifice openers on the cervical dentine thickness of human mandibular first molars, using cone beam computed tomography (CBCT). Materials and methods: Forty human permanent mandibular first molars were decoronated and sectioned using a water-cooled safe...

Abstract: Aim: To compare push-out bond strength of gutta percha and three root canal sealers AH-Plus, MTA Fillapex, Gutta flow 2. Materials & Methods: Sixty human freshly extracted lower premolars were prepared using nickel titanium Revo-S files till AS 40 finishing file and divided into three equal groups n=20, Group I: Gutta percha/AH-Plus seal...

This study was carried out to evaluate the effect of an alternative adhesive strategy; double layering dentin bonding procedure in root canal obturation on the durability of root canal sealing using Resilon/Epiphany dual cure resin composite sealer system.

To evaluate the antibacterial potential of dental cements on the growth of the colonies of Streptococcus mutans.