DISSERTATION – SYNOPSIS
DR. ANGEL MARY IDICULLA POST GRADUATE STUDENT
DEPARTMENT OF CONSERVATIVE DENTISTRY AND ENDODONTICS
BATCH 2012-2015
A.J.INSTITUTE OF DENTAL SCIENCES, KUNTIKANA, MANGALORE.
RAJIV GANDHI UNIVERSITY OF HEALTH SCIENCES, KARNATAKA BANGALORE ANNEXURE II
PROFORMA FOR REGISTRATION OF SUBJECTS FOR DISSERTATION
1. Name of the Candidates DR. ANGEL MARY IDICULLA POST GRADUATE STUDENT And Address DEPARTMENT OF CONSERVATIVE (in block letters) DENTISTRY AND ENDODONTICS
A.JINSTITUTE OF DENTAL SCIENCES, NH-17 , KUNTIKANA MANGALORE-575004
2. Name of the institution A.J INSTITUTE OF DENTAL SCIENCES, KUNTIKANA MANGALORE
3. Course of study and subject MASTER OF DENTAL SURGERY, CONSERVATIVE DENTISTRY AND ENDODONTICS
4. Date of admission to course 22/05/2012
5. Title of the topic:
“SHEAR BOND STRENGTH OF ONE SINGLE NANO COMPOSITE RESIN TO HIGH COPPER AMALGAM WHEN DIFFERENT CONDITIONING METHODS WERE USED. AN IN-VITRO STUDY”. 6. Brief resume of the intended work:
6.1 Need for the study:
Dental amalgam is an excellent, widely used restorative material in dentistry. However in some clinical situations there is a necessity to join an amalgam restoration with composite resin because of extensive defects in tooth structure or to mask the unesthetic appearance of the amalgam restoration or to repair defective amalgam restorations, especially including cusp fractures. Since composite resin and dental amalgam are two dissimilar materials, therefore the question is whether any problem is likely to arise from such a combination. Hence this in-vitro study is intended to compare the Shear Bond Strength of one single Nano composite resin to high copper amalgam when different conditioning methods were used.
2. Review of literature:
1. F Hadavi, J H Hey, ER Ambrose . Shear bond strength to amalgam : an experiment invitro using diffrent bonding systems. OPERATIVE DENTISTRY. 1991;16:2- 5
F Hadavi et al evaluated the shear bond strength between amalagam and composite resin with and without the use of adhesive systems. It was found that the application of cover up II or prisma universal bond prior to placement of composite resin enhanced the shear bond strength between amalgam and composite resin more than 5 times and a shear strength of 4.34 and 4.3 Mpa was measured respectively. Acid etching of the roughened amalgam surface prior to application of prisma universal bond decreased the bond strength by nearly 45%. 2. M Ozcan, C Koolman, A Aladag, M Dundar. Effects of different conditioning methods on the bond strength of composite resin to amalgam . OPERATIVE DENTISTRY. 2011; 36(3): 318-325.
M Ozcan et al conducted this study to investigate the effects of different conditioning methods that could be used for repair of amalgam fractures. Five types of silanes, metal primers, or adhesives (Visiobond [V], Porcelain Photobond [PP], Alloy Primer [AP], Unibond sealer [Us], ESPE-Sil [ES]), and four opaquers, namely, Clearfil St Opaquer (CstO), Sinfony (S), Miris (M), and an experimental Opaquer (EO-Cavex), were used. Shear bond strengths were evaluated after 5 weeks of water storage (analysis of variance [ANOVA], Tukey honestly significant differences [HSD], α=0.05). Surface conditioning techniques affected the bond strengths of composite adhesion to amalgam. Experimental opaquer exhibited lower values. Leaving a small border of enamel around the restoration decreased the bond strength.
3. F Hadavi, J H Hey, E R Amberose, H E Elba Drawy. The influence of an adhesive system on shear bond strength of repaired high copper amalgam. OPERATIVE DENTISTRY .1991;16: 175-180
The shear bond strengths of intact high-copper spherical and admixed amalgams were compared with repaired high-copper spherical and admixed amalgam specimens with and without the use of an adhesive system (Amalgambond). In the spherical group the shear bond strength of the repaired specimens was found to be 55 and 53.2% of the intact specimens without and with the use of the adhesive system. After thermocycling those percentages were 48.5 and 43. In the admixed groups those percentages were 39, 36.5, 34.5, and 35.2 respectively. It was found that the application of Amalgambond did not significantly increase the strength of the repaired amalgam. Thermocycling only had a significantly adverse effect on the repair strength in the admixed group repaired without an adhesive system. 4. N Bichacho, R Pilo, T Brosh, M Berkovich, M Helft. Shear bond strength of composite resin to fresh amalgam. OPERATIVE DENTISTRY. 1995; 20: 68- 73
The shear bond strength between fresh amalgam and composite resin using three adhesive systems was assessed. Amalgambond (5.19 MPa), All-Bond (3.45 MPa), and Clearfil New-Bond (4.37 MPa) had comparable shear bond strengths higher than Enamel Bond (1.27 MPa) after 48 hours of water immersion. This bond was hydrolytically degraded during 100 days of immersion in water. The greatest deterioration was observed for Clearfil New-Bond (0.81 MPa). Amalgambond provided the best results, whereas All-Bond and Clearfil New-Bond had comparable bond strength to Enamel Bond at the end of the experiment.
5. N D Ruse, R T Sekimoto, D Feduik. The effect of amalgam surface preparation on shear bond strength between composite and amalgam. OPERATIVE DENTISTRY .1995;20:180-185
The aim of this study was to investigate the effect of amalgam surface preparation on the short-and long-term in vitro shear bond strength between a dental amalgam (Valiant) and two dental composites (Herculite, Z100) mediated by three universal bonding agents (All-Bond 2, Amalgambond, and Scotchbond Multi-Purpose). The results have shown that: Sandblasting resulted in higher shear bond strength than grinding, except for 1-day All-Bond 2, where no differences were identified
There was no difference in the shear bond strength between samples with parallel or perpendicular ground surfaces for a given bonding system and storage time.
For All-Bond 2, the 7-day shear bond strength of parallel and perpendicular ground samples dropped to half of the 1-day values, while the sandblasted samples showed a constant, high shear bond strength over 30 days.
For Amalgam bond, the shear bond strength of parallel, perpendicular, and sand blasted samples was constant over 30 days; and 5) for Scotchbond Multi-Purpose, a sharp drop in the 7-day shear bond strength was recorded for all the samples, irrespective of amalgam surface preparation.
6.3 Objectives of the study:
The objective of this in-vitro study is to compare the Shear Bond Strength of one single composite resin to high copper amalgam when different conditioning methods were used. 7 Materials and method:
7.1 Source of data:
Thirty round acrylic cylinders were fabricated and a round undercut cavity was prepared in the centre of acrylic surface. Ten freshly extracted non carious human central incisors were collected not less than one month from the start of the experiment, from the Department of Oral & Maxillofacial Surgery, A. J. Institute Of Dental Sciences & from private dental clinics in & around mangalore and were surfaced adhering to CDC infection control protocols global.
7.2 Methods of collection of data(including sampling procedure, if any)
Selection of Teeth:
Samples were assigned at random to three experimental groups each consisting of ten acrylic samples and one control group of ten central incisors.
Methodology:
Thirty round acrylic cylinders were fabricated with consistent dimensions to fit into the device. A round undercut cavity was prepared in the centre of acrylic surface and the cavity was restored using high copper amalgam. The amalgam alloy was triturated according to manufacturer’s recommendations and condensed using a hand condenser following acceptable operative procedures. The cavity was overfilled and with a sharp hand instrument and the mercury- rich was removed. Then the amalgam surface was roughened with a diamond bur. Samples were assigned at random to three experimental groups each consisting of ten acrylic samples and one control group of ten central incisors.
GROUPS:
8 List of references:
1. F Hadavi, J H Hey, ER Ambrose . Shear bond strength to amalgam : an experiment invitro using diffrent bonding systems. OPERATIVE DENTISTRY. 1991;16:2- 5.
2. M Ozcan, C Koolman, A Aladag, M Dundar. Effects of different conditioning methods on the bond strength of composite resin to amalgam . OPERATIVE DENTISTRY. 2011; 36(3): 318-325.
3. F Hadavi, J H Hey, E R Amberose, H E Elba Drawy. The influence of an adhesive system on shear bond strength of repaired high copper amalgam. OPERATIVE DENTISTRY. 1991; 16: 175-180.
4. N Bichacho, R Pilo, T Brosh, M Berkovich, M Helft. Shear bond strength of composite resin to fresh amalgam. OPERATIVE DENTISTRY. 1995; 20: 68- 73.
5. N D Ruse, R T Sekimoto, D Feduik. The effect of amalgam surface preparation on shear bond strength between composite and amalgam. OPERATIVE 9. Signature of candidate:
10. Remarks of the guide:
11. Name & Designation of DR. RAJARAM NAIK
(in block letters): HEAD OF THE DEPARTMENT 11.1 Guide: CONSERVATIVE DENTISTRY AND ENDODONTICS A.J. INSTITUTE OD DENTAL SCIENCES, MANGALORE.
11.2 Signature:
11.3 Co-Guide (if any)
11.4 Signature:
11.5Headof Department DR. RAJARAM NAIK PROFESSOR CONSERVATIVE DENTISTRY AND ENDODONTICS A.J. INSTITUTE OD DENTAL SCIENCES, MANGALORE.
11.6 Signature:
12. 12.1 Remarks of the Chairman & DR. DEEPAK NAYAK Principal: 12.2 Signature :