Behrad Tanbakuchi

Tehran University of Medical Sciences

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Sara Valizadeh

Tehran University of Medical Sciences

Sarvin Sarmadi

Tehran University of Medical Sciences

Javad Chalipa

Tehran University of Medical Sciences

Atefe Saffar Shahroudi

Tehran University of Medical Sciences

Maryam Javaheri Mahd

Tehran University of Medical Sciences

Maryam Nasiri

Tehran University of Medical Sciences

Arian Hesam Arefi

Kerman University of Medical Sciences

Hooman Shafaee

Mashhad University of Medical Sciences

Sepideh Arab

Tehran University of Medical Sciences

Farzin Heravi

Mashhad University of Medical Sciences

Cooperative Institutions

Tehran University of Medical Sciences

Mashhad University of Medical Sciences

University of Tehran

Shahid Beheshti University of Medical Sciences

Islamic Azad University Dental Branch of Tehran

Mazandaran University of Medical Sciences

Islamic Azad University, Tehran

Shahid Beheshti University

University of Dental Medicine

Baqiyatallah University of Medical Sciences

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Influence of Root Canal Tapering on Smear Layer Removal.

PubMed (2016)

Mina Zarei Maryam Javidi Farzaneh Afkhami Behrad Tanbakuchi Mohsen Movahed Zadeh

The purpose of the study presented here was to compare the influence of root canal taper on the efficacy of irrigants and chelating agents in smear layer removal. Eighty mesial roots of molar teeth were selected and prepared with rotary instruments. In group A, file 30/0.02 and in group B, file 30/0.4 were placed at working length and the smear layer was removed. In groups C and D, root canal preparation was the same as in groups A and B, respectively, except that the smear layer was not removed. The amount of the smear layer was quantified using a scanning electron microscope. Greater smear layer was detected in the apical portion of each group, whereas no significant difference was detected between groups in other portions. No statistical difference was found between canals with different tapers.

Smear layer

Tapering

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Comparative Assessment of the Shear Bond Strength of Ceramic Brackets Bonded to the Enamel Surface with a Self-adhesive System

Frontiers in Dentistry (2024)

Jalal Janfaza Sara Valizadeh Behrad Tanbakuchi

This study aimed to evaluate the shear bond strength of ceramic brackets bonded to the enamel surface using Vertise Flow, with or without the application of phosphoric acid.

Shear Strength

10.18502/fid.v21i18.15551

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Efficacy of Application of Periodontal Ligament Stem Cells in Bone Regeneration: A Systematic Review of Animal Studies

Dental Hypotheses (2022)

Pardis Aghandeh Farnaz Kouhestani Fatemeh Isamorad Solmaz Akbari Behrad Tanbakuchi

Introduction: We aimed to systematically review the animal studies that have investigated the efficacy of periodontal ligament stem cells (PDLSCs) in bone regeneration. Methods: Web of science, Scopus, PubMed, Embase, Cochrane Library, and ProQuest were searched to September 2022 for animal studies investigating bone regeneration using PDLSCs. Results: Twenty studies were included. Calvaria and alveolar defects were treated with stem cells. The cells were mainly carried with hydrogel, hydroxyapatite, and collagen scaffolds. PDLSCs promoted osteogenesis compared with cell-free scaffolds, except in one study where biphasic calcium phosphate block scaffolds alone or with Bone morphogenic protein 2 had superior outcomes in calvaria defects. Controversial results were reported when comparing the osteogenic potential of PDLSCs and bone marrow stem cells. Two studies reported higher potential in BMSCs, and two others reported higher bone formation and more bone quality in PDLSCs. Conclusion: With the limitations of this study, PDLSCs might have promising potential to accelerate bone regeneration in artificial defects; however, due to high heterogeneity in the outcomes of the present studies, before moving forward to human experiments, further preclinical in vivo studies are needed.

Calvaria

Periodontal fiber

10.4103/denthyp.denthyp_136_22

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Optimal Gingival Show on Smiling Based on Different Lip Forms from the Perspective of Laypeople, Orthodontists, and Oral and Maxillofacial Surgeons

Atefe Saffar Shahroudi Fatemeh Elhami Hadi Hamidi Shishvan Behrad Tanbakuchi

10.2139/ssrn.4860178

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Comparative assessment of the orthodontic wire’s friction coated with zinc oxide nanoparticles by two methods of chemical precipitation and hydrothermal process

Folia Medica (2022)

Behrad Tanbakuchi Sharmin Kharrazi Matin Nikfarjam Mohammad Sadegh Ahmad Akhoundi Atefe Saffar Shahroudi

In orthodontic treatment with sliding technique, reduction of frictional forces could result in a more effective treatment. Recently, wire coating with nanoparticles were proposed to reduce frictional forces.

10.3897/folmed.64.e67842

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Evaluation of the cell viability and antimicrobial effects of orthodontic bands coated with silver or zinc oxide nanoparticles: An in vitro study

The Korean Journal of Orthodontics (2023)

Rashin Bahrami Maryam Pourhajibagher Alireza Badiei Reza Masaeli Behrad Tanbakuchi

We aimed to evaluate the cell viability and antimicrobial effects of orthodontic bands coated with silver or zinc oxide nanoparticles (nano-Ag and nano-ZnO, respectively).In this experimental study, 30 orthodontic bands were divided into three groups (n = 10 each): control (uncoated band), Ag (silver-coated band), and ZnO (zinc oxide-coated band). The electrostatic spray-assisted vapor deposition method was used to coat orthodontic bands with nano-Ag or nano-ZnO. The biofilm inhibition test was used to assess the antimicrobial effectiveness of nano-Ag and nano-ZnO against Streptococcus mutans, Lactobacillus acidophilus, and Candida albicans. Biocompatibility tests were conducted using the 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide assay. The groups were compared using oneway analysis of variance with a post-hoc test.The Ag group showed a significantly higher reduction in the number of L. acidophilus, C. albicans, and S. mutans colonies than the ZnO group (p = 0.015, 0.003, and 0.005, respectively). Compared with the control group, the Ag group showed a 2-log10 reduction in all the microorganisms' replication ability, but only S. mutants showed a 2-log10 reduction in replication ability in the ZnO group. The lowest mean cell viability was observed in the Ag group, but the difference between the groups was insignificant (p > 0.05).Coating orthodontic bands with nano-ZnO or nano-Ag induced antimicrobial effects against oral pathogens. Among the nanoparticles, nano-Ag showed the best antimicrobial activity and nano-ZnO showed the highest biocompatibility.

Biocompatibility

Viability assay

10.4041/kjod22.091

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The Effect of Photobiomodulation on Distraction Osteogenesis

Journal of lasers in medical sciences (2019)

Sarvin Sarmadi Behrad Tanbakuchi Arian Hesam Arefi Nasim Chiniforush

Distraction osteogenesis (DO) is a surgical procedure to increase bone height in different body parts. DO includes a surgical incision, wherein the bone is cut and a device is installed for further separation of the two ends by gradual unscrewing of the device screw. New bone gradually forms and fills the gap, and the bone height increases as such. Photobiomodulation (PBM) or low-level laser therapy (LLLT) enhances the formation of soft and hard tissue such as bone and can, therefore, accelerate the process of DO and shorten the duration of different surgical phases of DO such as latency, activation, and consolidation. Different laser types with variable exposure settings and protocols have been used for this purpose. The gallium-aluminum-arsenide (GaAlAs) diode laser is the most commonly used laser type for LLLT. This study reviews 18 published articles on the effects of LLLT on DO and summarizes their findings to further elucidate this topic.

Bone Formation

10.15171/jlms.2019.53

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Molar Uprighting Using Mini-Screws after Distalization by the Pendulum Appliance: A Case Report

DOAJ (DOAJ: Directory of Open Access Journals) (2013)

Amir Moradi Behrad Tanbakuchi Hooman Shafaee

A 16-year-old Class II female patient was treated without tooth extraction. The upper first molars were distalized by the Pendulum appliance. After six months, the molars tipped significantly to the distal. To correct this side effect, we decided to upright the molars using skeletal anchorage. On each side, a mini-screw was inserted between first and second premolars in the buccal cortical plate. An auxiliary spring was placed between the mini-screw head and the molar buccal tube. The resultant moment made the first molar upright. In addition, the side effects of this mechanic, i.e. molar intrusion and molar buccal tipping, counteract the extrusion and medial movement caused by the Pendulum Appliance. The aim of this case report was to present an innovative method for molar uprighting using skeletal anchorage.

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Effects of crown-root angle on stress distribution in the maxillary central incisors’ PDL during application of intrusive and retraction forces: a three-dimensional finite element analysis

Progress in Orthodontics (2013)

Farzin Heravi Soheil Salari Behrad Tanbakuchi Shaghayegh Loh Motahare Amiri

Abstract Background Different crown-root angulations of maxillary central incisors can be assumed as a potential reason for many underscored outcomes of orthodontic treatments. The aim of this study was to determine the effects of the different crown-root angles on stress distributions in the maxillary central incisor’s periodontal ligament (PDL) during application of intrusive and retraction forces using a 3D finite element method. Methods Two models of a maxillary central incisor were constructed using ANSYS software: the first one with an angle of 166.7° (as a sample of the maxillary central incisor in a class II, division 2 patient) and the other one with an angle of 173.4° (normal angulation). Each of the samples was loaded twice by an intrusive force (0.25 N) and a retraction force (0.5 N) through the ideal position of brackets. Results FEM results showed little difference between stress distributions in the two models during intrusion (ten thousandth) compared to retraction (thousandth). In the application of retraction force, the stress concentration on the curved tooth was less than the other. Conclusion To produce similar patterns of stress in the PDL, orthodontists can apply 1.18 times heavier retraction forces on the maxillary central incisors in class II, division 2 patients compared to class I patients.

Periodontal fiber

Maxillary incisor

10.1186/2196-1042-14-26

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Two-Dimensional Analysis of the Size of Nasopharynx and Adenoids in Non-Syndromic Unilateral Cleft Lip and Palate Patients Using Lateral Cephalograms

DOAJ (DOAJ: Directory of Open Access Journals) (2018)

Sarvin Sarmadi Javad Chalipa Behrad Tanbakuchi Maryam Javaheri Mahd Maryam Nasiri

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