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Bulletin of the National Research Centre
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Dentistry

  1. Extraction of the first premolar followed by canine retraction into the extraction space is a common treatment in orthodontics. Molar rotation occurs when they are used as anchorage units for the canine distal...

    Authors: Reem M. AlShazly, Ahmad F. Almohammad, Hend Salah ElSayed and Amr Ragab EL-Beialy

    Citation: Bulletin of the National Research Centre 2021 45:160

    Content type: Research

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  2. The choice between extraction and expansion treatment is an endless debate in orthodontics. Ethnic and secular variations showed that there was a change in  arch perimeter over the last 50 years. Accordingly,...

    Authors: Omnia A. Elhiny, Mohammed Abou Elyazied and Ghada A. Salem

    Citation: Bulletin of the National Research Centre 2021 45:141

    Content type: Research

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  3. This study aimed at assessing the effect of different kinematics as well as different instrument designs on efficiency of cutting of two heat-treated nickel–titanium systems. Forty resin canals with 30°-angle ...

    Authors: Engy M. Kataia, Mohamed Mokhtar Nagy, Mohamed M. Kataia and Hala Fayek Khalil

    Citation: Bulletin of the National Research Centre 2021 45:120

    Content type: Research

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  4. The oral lymphoepithelial cyst (LEC) is a rare, soft-tissue, developmental cyst, initially presented by Gold in 1962 as a “branchial cleft cyst”. It may occur in the pancreas, tongue, neck, and other regions o...

    Authors: Sana Iqbal, Sufyan Ahmed and Mehwash Kashif

    Citation: Bulletin of the National Research Centre 2021 45:111

    Content type: Case Report

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  6. Using remineralizing agents during and after bleaching procedures could maintain enamel surface, decreasing its erosive susceptibility. This study evaluated the efficacy of an in-office and at-home bleaching m...

    Authors: Shaymaa M. Nagi, Shahinaz H. Nabil and Mohamed H. Zaazou

    Citation: Bulletin of the National Research Centre 2021 45:68

    Content type: Research

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  7. Primary chronic osteomyelitis is a rare occurrence in the pediatric mandible though it exclusively affects the mandible with no age preference. The absence of pus, fistula and sequestration are characteristic ...

    Authors: T. Kavya Priya, Amith Hadhimane, Kirthi Kumar Rai, H. R. Shiva Kumar, Amarnath P. Upasi and Vinayak Gourish Naik

    Citation: Bulletin of the National Research Centre 2021 45:64

    Content type: Case Report

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  8. Oral lichen planus is a chronic inflammatory and immune-mediated disease that affects the oral mucosa. Recent findings have suggested that oral lichen planus is often associated with submucosal fibrotic change...

    Authors: Atsushi Shudo

    Citation: Bulletin of the National Research Centre 2021 45:56

    Content type: Case Report

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  9. To evaluate the antibacterial effect of diode laser and photodynamic therapy using methylene blue dye when used alone or in combination with Moringa oleifera extract on root canal microbes. A total of 50 single r...

    Authors: Doaa M. Sadony, Maram E. Khallaf and Jackline Samir Kamal

    Citation: Bulletin of the National Research Centre 2021 45:53

    Content type: Research

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  10. Comparing shaping ability of Azure and Fanta AF One in rotation and reciprocation. This study was conducted on 40 resin blocks, having canal curvatures 30°-angle and of 16-mm length. The blocks were assigned t...

    Authors: Engy M. Kataia, Mohamed Mokhtar Nagy, Mohamed M. Kataia and Hala Fayek Khalil

    Citation: Bulletin of the National Research Centre 2021 45:42

    Content type: Research

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  11. Coronavirus disease (COVID-19) is considered a highly contagious disease with flu-like symptoms and causing relatively high level of death. It can be transmitted from a person to another through droplets and t...

    Authors: Rasha F. Sharaf and Nihal Kabel

    Citation: Bulletin of the National Research Centre 2021 45:32

    Content type: Research

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  12. This study aimed to evaluate the remaining amount of intra canal medicament in the root canals and their effect on microhardness of radicular dentine. In this study, ninety straight single-rooted teeth were us...

    Authors: Yousra Aly, Nada Omar, Engy M. Kataia, Maram E. Khallaf and Mohamed H. Zaazou

    Citation: Bulletin of the National Research Centre 2021 45:12

    Content type: Research

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  13. This paper outlines the current status and mechanism for identifying dental implants, with emphasis on future direction and updated technology, and covers the existing factors influencing the identification of...

    Authors: Mohammad Ali Saghiri, Peter Freag, Amir Fakhrzadeh, Ali Mohammad Saghiri and Jessica Eid

    Citation: Bulletin of the National Research Centre 2021 45:7

    Content type: Review

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  14. Many factors play a role in the long-term survival of osseointegrated dental implants. Among these, the preservation of crestal bone remains to be the key principal. The aim of this comparative study was to as...

    Authors: Mahmoud Shalash and Ahmad Abdalsamad

    Citation: Bulletin of the National Research Centre 2020 44:184

    Content type: Research

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  15. The study presented here systematically examines the potential involvement of dental, oral and maxillofacial centres (ZMK) in the management of pandemia or in large-scale emergencies. It looks at available mat...

    Authors: Marcus Schiller, Marijatta Pilette, Björn Rahlf, Constantin von See and N.-C. Gellrich

    Citation: Bulletin of the National Research Centre 2020 44:174

    Content type: Research

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  16. The field of laser-based photochemical reactions receives a great promising for additional applications especially for targeting cells, pathogens, or molecules. Limited studies have investigated the impact of ...

    Authors: Mohamed M. Abo El-Dahab, Mostafa Gheith, Nadia Lashin Soliman and Riham Mohamed Aly

    Citation: Bulletin of the National Research Centre 2020 44:170

    Content type: Research

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  17. The purpose of the current study was to inspect and compare the influence of applying continuous rotation and reciprocation motions on the cyclic fatigue resistance of Protaper Next (PTN) file (X2) and WaveOne...

    Authors: Amira Galal Ismail, Manar Galal and Nehal Nabil Roshdy

    Citation: Bulletin of the National Research Centre 2020 44:164

    Content type: Research

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  18. Flexibility during bending is a critical feature that influences the performance and safety of endodontic nickel-titanium rotary instruments. Flexibility of the endodontic files could be assessed via laborator...

    Authors: Amira Galal Ismail, Manar Galal, Mohamed H. Zaazou, Tamer M. Hamdy and Rasha M. Abdelraouf

    Citation: Bulletin of the National Research Centre 2020 44:140

    Content type: Research

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  19. Geometrical designs of nickel-titanium (NiTi) rotary instruments have a considerable influence on their mechanical performance, and thereby have the tendency to fracture.

    Authors: Manar Galal and Tamer M. Hamdy

    Citation: Bulletin of the National Research Centre 2020 44:121

    Content type: Research

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  20. The aim of this study was to compare the effect of different kinematics and operational temperature on cyclic fatigue resistance of Protaper Next, WaveOne Gold, and Twisted File Adaptive files in a static model.

    Authors: Amira Galal Ismail, Manar Galal and Mohamed Mokhtar Nagy

    Citation: Bulletin of the National Research Centre 2020 44:116

    Content type: Research

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  21. Understanding the mental foramen (MF) position and prevalence and location of the anterior loop (AL) is important during clinical and surgical procedures close to the mental foramen to avoid damage to the neur...

    Authors: M. Shalash, Maram E. Khallaf and A. R. Ali

    Citation: Bulletin of the National Research Centre 2020 44:110

    Content type: Research

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  22. The lack of adequate data on the oral health status among the Egyptians is a challenging barrier for the assessment and improvement of oral health needs.

    Authors: Amani Moussa, Eman Ibrahim, Ahmed Esmat, Sherihan Eissa and Magda Ramzy

    Citation: Bulletin of the National Research Centre 2020 44:16

    Content type: Research

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  23. This study was conducted to evaluate the marginal bone height changes around dental implants in mandibular implant-retained complete acrylic overdentures using cone beam computed tomography (CBCT) with impleme...

    Authors: Eman Mostafa Ahmed Ibraheem, Hoda Gaafar Hassan Hammad and Ahmed Mostafa Esmat El-Sisy

    Citation: Bulletin of the National Research Centre 2019 43:198

    Content type: Research

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