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Article
The effect of different types of mouth washes on the modulus elasticity of elastic ligature

Author: Wael Abdul Razzak Al waelly
Journal: Muthanna Medical Journal مجلة المثنى الطبية ISSN: 2226146x Year: 2017 Volume: 4 Issue: 1 Pages: 1-7
Publisher: Al-Muthanna University جامعة المثنى

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Abstract

The mouth washes are widely used for maintain oral hygiene for patient wearing fixed orthodontic appliances but had effect on the elastic ligature so it’s important to measure the modulus elasticity of elastic ligature. This study was carried out to evaluate the effect of different type of mouthwashes on modulus elasticity of the elastic ligature. A 40 elastic ligatures were selected from commercially available clear elastic ligature, the elastics were adjusted on S.S brackets which were bonded to maxillary right first premolar by chemical composite, the elastic ligatures were divided into four main groups and each group had 10 elastics as follows: group A. 10 elastic ligatures were immersed in a pool distilled water at 37c instead of saliva. Group B. 10 elastic ligatures were immersed in bio fresh. Group C. 10 elastic ligatures were immersed in corsodyl. Group D, 10 elastic ligatures were immersed in parodontax. All samples were then tested to determine the modulus elasticity by instron machine. The Paradontax mouthwash group provided a higher value of mean of the modulus elasticity of the elastic ligature followed by distilled water and Corosydel groups. The biofresh had the least value of mean of the modulus elasticity. There were highly significant differences between control and Corosydel; and control and biofresh groups (P≤0.01). No significant differences, however, between control and paradontax groups (P≥0.05). In conclusion, the Paradontax mouthwash group had a great effect on the modulus elasticity of the elastic ligature. The biofresh had the least effect on the modulus elasticity.


Article
Shear bond strength of orthodontic brackets using different types of bonding materials

Author: Dr. Wael Abdul Razzak Al Waelly د. وائل عبد الرزاق
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2018 Volume: 15 Issue: 1 Pages: 25-32
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

Aim: the shear bond strength testing has been accomplished to lead orthodontists inselection of adhesives and brackets. The current research was conducted to assessthe effect of using different types of bonding material on the shear bond strengthof plastic brackets.Materials and methods: Thirty upper first premolar teeth were utilized. There were 3groups: - chemical composite, no mix chemical composite and light curecomposite. Samples were then subjected to shear bond test using Instron testingmachine. Samples data were then analyzed and compared using ANOVA andLSD tests.Results: The results indicated that the chemical composite presented the greatestvalue of mean shear bond strength. On the other hand, the light cure gave the leastmean shear bond strength. Highly significant differences between two groups(P≤0.01) ;and among all groups(P≤0.01)were obtained.Conclusion: Chemical composites provided a greater shear bond strength than othertypes of composite (no mix and light cure).

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