push-out bond strength of calcium enriched mixture exposed to alkaline environment

نویسندگان

f. sobhnamayan department of endodontics, school of dentistry, shiraz university of medical sciences, shiraz, iran

a. adl department of endodontics and biomaterials research centre, school of dentistry, shiraz university of medical sciences, shiraz, iran

m. sarbaz student research committee, school of dentistry, shiraz university of medical sciences, shiraz, iran

n. sadat shojaee department of endodontics, school of dentistry, shiraz university of medical sciences, shiraz, iran

چکیده

statement of problem: calcium hydroxide which is commonly used as an intracanal medicament, changes the ph of dentin and periradicular tissues to an alkaline ph. in some clinical situations, endodontic reparative cements like calcium enriched mixture cement are used after calcium hydroxide therapy. however, the alkaline ph may affect the physical properties of this cement. objectives: this study was designed to evaluate the effect of alkaline ph on the push-out bond strength of calcium enriched mixture. materials and methods : 80 root slices were prepared from single-rooted human teeth and their lumens were instrumented to achieve a diameter of 1.3mm. calcium enriched mixture (cem) was mixed according to the manufacturer’s instruction and introduced into the lumens of root slices. the specimens were then randomly divided into 4 groups (n = 20) and wrapped in pieces of gauze soaked in synthetic tissue fluid (stf) buffered in potassium hydroxide at ph values of 7.4, 8.4, 9.4, or 10.4. the samples were incubated for 4 days at 37°c. the push-out bond strengths were then measured using a universal testing machine. failure modes were examined under a light microscope at ×20 magnification. the data were analyzed using one-way analysis of variance and tukey’s post hoc tests. results: the greatest (1.41 ± 0.193 mpa) and lowest (0.8 ± 0.06 mpa) mean push-out bond strengths were observed after exposure to ph values of 7.4 and 8.4, respectively. there were significant differences between the neutral group and the groups with ph of 8.4 ( p = 0.008) and 10.4 ( p = 0.022). the bond failure was predominantly of cohesive type for all experimental groups. conclusions: under the condition of this study, alkaline ph adversely affected the push-out bond strength of cem cement.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

effect of acidic environment on the push-out bond strength of calcium-enriched mixture cement

introduction: this laboratory study was performed to evaluate the effect of different acidic ph values on the push-out bond strength of calcium-enriched mixture (cem) cement. methods and materials: forty-eight root dentin slices were obtained from freshly extracted single rooted human teeth and their lumen were instrumented to achieve a diameter of 1.3 mm. then, cem cement was mixed according t...

متن کامل

Effect of Acidic Environment on the Push-Out Bond Strength of Calcium-Enriched Mixture Cement

INTRODUCTION This laboratory study was performed to evaluate the effect of different acidic pH values on the push-out bond strength of calcium-enriched mixture (CEM) cement. METHODS AND MATERIALS Forty-eight root dentin slices were obtained from freshly extracted single rooted human teeth and their lumen were instrumented to achieve a diameter of 1.3 mm. Then, CEM cement was mixed according t...

متن کامل

the effect of chlorhexidine on the push-out bond strength of calcium-enriched mixture cement

introduction: the aim of this in vitro study was to evaluate the effect of 2% chlorhexidine (chx) on the push-out bond strength (bs) of calcium-enriched mixture (cem) cement. methods and materials: root-dentin slices from 60 single-rooted human teeth with the lumen diameter of 1.3 mm were used. the samples were randomly divided into 4 groups ( n =15), and their lumens were filled with cem cemen...

متن کامل

The Effect of Chlorhexidine on the Push-Out Bond Strength of Calcium-Enriched Mixture Cement

INTRODUCTION The aim of this in vitro study was to evaluate the effect of 2% chlorhexidine (CHX) on the push-out bond strength (BS) of calcium-enriched mixture (CEM) cement. METHODS AND MATERIALS Root-dentin slices from 60 single-rooted human teeth with the lumen diameter of 1.3 mm were used. The samples were randomly divided into 4 groups (n=15), and their lumens were filled with CEM cement ...

متن کامل

The Effect of Various Mixing Techniques on the Push-Out Bond Strength of Calcium Enriched Mixture

STATEMENT OF THE PROBLEM Correct proportioning and mixing are essential to ensure cements attain their optimum physical properties. PURPOSE The aim of this experimental study was to evaluate the influence of various mixing techniques including manual, mechanical mixing, and ultrasonic vibration on push-out bond strength of calcium enriched mixture (CEM). MATERIALS AND METHOD Ninety 2-mm-thi...

متن کامل

The Effect of Calcium Chloride on Push-Out Bond Strength of Calcium-Enriched Mixture Cement and Mineral Trioxide Aggregate

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 m...

متن کامل

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید


عنوان ژورنال:
journal of dental biomaterials

جلد ۲، شماره ۳، صفحات ۹۲-۰

کلمات کلیدی

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023