Mohammad Yazdizadeh

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The purpose of endodontic therapy is to preserve the patient's natural teeth without compromising the patient's local or systemic health. Calcium hydroxide has been included in several materials and antimicrobial formulations that are used in several treatment modalities in endodontics, such as inter-appointment intracanal medicaments. The purpose of this(More)
The purpose of this study was to determine the minimum instrumentation size required for the effective penetration of irrigants and elimination of debris and smear layer from the apical third of the root canals. The mesiobuccal canals of 40 freshly extracted human mandibular first molar teeth were instrumented using the crown-down technique. The teeth were(More)
The aim of this study was to evaluate and compare the antifungal effect of white-coloured mineral trioxide aggregate (WMTA) and grey mineral trioxide aggregate (GMTA) using a tube-dilution test. MTA preparations were freshly mixed and tested after 24 h on Candida albicans. The experiment was carried out in 24-well culture plates. Fifty wells were used and(More)
OBJECTIVE The purpose of this study was to compare the antimicrobial effect of AH-26, RealSeal (RS), and GuttaFlow after 24 hours and after one week. METHODOLOGY All sealers were prepared according to the manufacturers' directions immediately before testing. The microorganisms used in this assay included Staphylococcus aureus and Streptococcus mutans,(More)
Aim. To compare microleakage of apexification using MTA in one or two sessions. Materials and Methods. 88 single rooted teeth were prepared and divided into two groups then received MTA apical plug. In the first group, the teeth were immersed in normal saline for 24 hours and then backfilled with guttapercha and AH26 sealer. In the second group, the teeth(More)
Internal resorption is rare in permanent teeth. Treatment is usually performed through warm gutta-percha technique. If the resorptive process perforates the root, treatment may be more difficult and is usually performed via surgical approach. Non-surgical repair of a perforating internal root resorption with MTA was conducted in this case. Before repairing(More)
The purpose of this report was to present the treatment of an immature necrotic permanent mandibular second molar using mineral trioxide aggregate (MTA) as an orthograde root filling. In such cases, the canal remains large, with thin and fragile walls, and the apex architecture remains divergent. This case demonstrates the efficacy of MTA in this particular(More)
INTRODUCTION The aim of this study was to compare the formation of dentinal crack and craze lines in the root dentin during root canal preparation with three different NiTi endodontic systems, naming Reciproc (RCP), ProTaper Universal (PTU) and Mtwo. METHODS AND MATERIALS One hundred extracted mandibular premolars with single canals were selected and(More)
INTRODUCTION Cyclic fatigue is the common reason for breakage of rotary instruments. This study was conducted to evaluate the effect of cryogenic treatment (CT) in improving the resistance to cyclic fatigue of endodontic rotary instruments. METHODS AND MATERIALS In this in vitro study, 20 RaCe and 20 Mtwo files were randomly divided into two groups of(More)
Calcium hydroxide was originally introduced to the field of endodontics by Herman in 1920 as a pulp-capping agent. Sealers play an important role in sealing the root canal system with the entombment of remaining microorganisms and filling inaccessible areas of prepared canals. This article reviews sealing ability, biocompatibility, antibacterial activity,(More)
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