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Article
Bond Strength of Resin Composite to Laser Treated Dentin Using Different Adhesive Systems (An in vitro study)

Authors: Zena A. Ahmed --- Makdad N. Chakmakchi
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2015 Volume: 15 Issue: 2 Pages: 405-411
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: To evaluate the effect of three different adhesive systems on shear bond strength of composite resin to Er,Cr:YSGG lased dentin. Materials and methods: Twenty one sound third molars were used. Occlusal third of crowns was cut using minitom machine to expose flat dentin surface. Laser irradiation was performed on a circular test area demarcated on each dentin surface. Samples randomly assigned to three groups (n=7) according to the adhesive systems that used which were: total etch adhesive (Adper single bond, 3M ESPE), two step self etch adhesive (Clearfil SE bond, Kurary), and all in one adhesive (Adper easy one, 3M ESPE). Adhesives were applied to the lased dentin surface according to manufacture instruction. Composite rod was applied over the bonded area and cured. Samples were stored in distilled water at 370for 24 hours. The evaluation of shear bond strength was employed by the use of universal testing machine. Results: Statistical analysis of data by analysis of variance (ANOVA) test and Duncanes multiple range test revealed no significant difference in the shear bond strength between the adhesive systems (P≤ 0.05). Conclusions: The results show that all the tested adhesive systems have relatively the same effect on the shear bond strength of composite resin to lased dentin surface.

Keywords

Dentin --- Er --- Cr:YSGG laser --- adhesive system.


Article
An In vitro Comparative Study to Evaluate The Apical Seal of Root Canals Prepared by Rotary Versus Reciprocating Wave-One Nickel Titanium System

Authors: Rasha M. Al-Shamaa --- Makdad N. Chakmakchi --- Karam A. Thiab
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2014 Volume: 14 Issue: 2 Pages: 288-293
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: The aim of present study is to assess the apical seal of root canals prepare by two different preparation techniques (Rotary and reciprocating technique) . Materials and Methods: Forty extracted human, single-rooted lower premolar teeth were decoronated at the cement-enamel junction (CEJ). The working length was determined for each tooth. The samples were divided into 2 experimental groups, each one consisted of 20 prepared teeth: group 1, rotary conventional preparation by using Wave-One file. group2, reciprocate instrumentation with Wave-One file. After instrumentation was completed then the teeth obturated with Single-cone technique related to this systems. Zinc oxide euginol (ZOE) sealer was used as a root canal sealer in this study. A dye penetration method was used to evaluate the apical seal and the teeth were cleared then apical leakage was measured using a stereomicroscope at (x10 magnification). The statistical analysis performed by Independent t-test. Results: Wave-One file instrumented by Reciprocation instrumentation technique was significantly differ from Rotary instrumentation technique for root canal preparation . The Reciprocation group registered better apical seal than Rotary group. Conclusions: Apical seal with the Wave-One Reciprocation technique and conventional Wave-One rotary approach were significantly difference. The Wave-One Reciprocation technique was markedly registered better apical seal than Wave-One rotary technique.


Article
Antibacterial Effect of Local Propolis Extracts and Pastes Against Enterococcus Faecalis

Authors: Jumana A. AL-Jawadi --- Ghada Y. Abdul Rahman --- Makdad N.Chakmakchi
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2014 Volume: 14 Issue: 2 Pages: 189-195
Publisher: Mosul University جامعة الموصل

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Abstract

AIMS:The aim of this study was to determine the antibacterial effect of ethanolic and aqueous extracts and pastes of propolis against Enterococcus faecalis and compare it with that of calcium hydroxide (intracanal medicament) (in vivo and ex vivo). MATERIALS AND METHODS:The antibacterial effect of the 30%,40% ethanolic and aqueous extract of propolis as well as of calcium hydroxide were detected by the turbidity method. The turbidity of the bacterial cultures was measured by light absorption in spectrophotometer and the antibacterial effect of propolis pastes prepared from ethanolic extract as well as that prepared from aqueous extract was examined on teeth and compared with that of calcium hydroxide by colony counting method. The result were analyzed by ANOVA test and Post Hoc tests.


Article
Sealing Ability of Biodentine as a Retrograde Filling Materials (A Comparative in vitro study)

Authors: Makdad N. Chakmakchi --- Maha M. Yahya --- Wiaam M.O. AL-Ashou
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2015 Volume: 15 Issue: 1 Pages: 357-361
Publisher: Mosul University جامعة الموصل

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Abstract

Aim: Inadequate apical seal is the major cause of endodontic failure, the root end filling material used should prevent ingress of potential contaminants from periapical tissue. Aims: The purpose of this in vitro study was to evaluate the sealing ability of Biodentine (Septodent) when used as a root-end filling material and to compared the result with that of White Mineral Trioxide Aggregate ( MTA) and Glass Ionomer Cement (GIC). Materials and Methods: The root canals of (34) extracted human teeth were instrumented and obturated with gatta percha. Apexes were resected and cavities were prepared to 3mm depth. Teeth were divided randomly into three groups(n=10): first group was retrofilled with Biodentine, second with MTA, third group with GIC, and positive (n=2) and negative (n=2) control groups. Nail varnish was applied to all root surfaces except the tip of the root. Following immersion in basic fuchsine 1% , the roots were sectioned longitudinally and depth of dye penetration was evaluated by stereomicro-scope at 40X magnification. Data were analyzed using one way ANOVA and Duncan›s multiple range test at P< 0.05. Results: In this study, biodentine was determined to be superior than MTA and GIC prevention apical microleakage when used as root-end filling. No statistical significant difference was observed between MTA and GIC. Conclusions: under the conditions of this in vitro study, despite some variation, Biodentine provides a better seal than MTA and GIC when used as retro filling, but along term in vivo study is required to prove it

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