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:: Volume 27, Issue 2 (4-2015) ::
J Iran Dent Assoc 2015, 27(2): 64-69 Back to browse issues page
Effect of marginal design on fracture resistance of IPS e.maxall ceramic restorations: Chamfer versus shoulder finish lines
Asadollah Ahmadzadeh1 , Farnoosh Golmohammadi * 2, Najmeh Mousavi3
1- Assistant Professor, Department of Prosthodontics, School of Dentistry, Ahwaz University of Medical Sciences. Ahwaz, Iran
2- Assistant Professor, Department of Prosthodontics, School of Dentistry, Kermanshah University of Medical Sciences. Kermanshah, Iran , farnoosh.gol@gmail.com
3- Assistant Professor, Department of Prosthodontics, School of Dentistry, Ghazvin University of Medical Sciences. Ghazvin, Iran
Abstract:   (4331 Views)

Background and Aim: One of the problems of all ceramic restorations is their risk of fracture due to occlusal loads. The aim of the present study was to compare the effect of two marginal designs (shoulder and chamfer) on the fracture resistance of IPS-emax all ceramic restorations.

Materials and Methods: One extracted maxillary first premolar received chamfer 50' marginal preparation (0.8 mm). Twenty impressions were made using poly vinyl siloxane. Then, chamfer was converted to shoulder 90'(1mm). After impression, epoxy resin dies were fabricated. Impressions of each epoxy resin die were made and poured with die stone. Twenty Press crowns and twenty ZirCAD crowns were made on stone dies and ce-mented on resin dies. Then, samples underwent a fracture test in a universal testing ma-chine. Data were analyzed by one-way ANOVA.

Results: The mean fracture resistance was 1426N for the chamfer ZirCAD samples, 1361.3N for the shoulder ZirCAD samples, 1059.9N for the chamfer Press samples and 1295.8N for the shoulder Press samples. One-way ANOVA revealed no difference among groups. (p=0.095).

Conclusion: After porcelain application, marginal design does not affect fracture resis-tance of single IPS-emax posterior crowns. Fracture resistance was approximately the same in Press and ZirPress groups probably due to porcelain application, because in Zir-CAD group fractures occurred in the porcelain prior to the core
Keywords: Chamfer, Shoulder, Fracture resistance, All ceramic, IPS emax
Full-Text [PDF 1116 kb]   (2705 Downloads)    
Type of Study: Original | Subject: Prosthodontics
References
1. Jung YS, Lee JW, Choi YJ, Ahn JS, Shin SW, Huh JB. A study on the in-vitro wear of the natural tooth structure by opposing zirconia or dental porcelain.J Adv Prosthodont.2010 Sept;2(3):111-5.
2. Rosenstiel SF, Land MF, Fujimoto J. Contemporary fixed prosthodontics. Mosby Incorporated; 2006, 774-790.
3. Barath VS, Faber FJ, Westland S, Niedermeier W. Spectrophotometric analysis of all-ceramic materials and their interaction with luting agents and different backgrounds. Adv Dent Res. 2003 Dec;17:55-60.
4. Komine F, Tomic M, Gerds T, Strub JR. Influence of different adhesive resin cements on the fracture strength of aluminum oxide ce-ramic posterior crowns. J Prosthet Dent. 2004 Oct; 92 (4):359-64.
5. Webber B, McDonald A, Knowles J. An in-vitro study of the compressive load at fracture of procera All ceramic crowns with varying thick-ness of veneer porcelain. J Prosthet Dent. 2003 Feb; 89(2): 154-60.
6. Jalalian E, Aletaha N. The effect of two marginal designs (chamfer and shoulder) on the fracture resistance of all ceramic restorations, Inceram: An in vitro study. J Prosthodont Res. 2011 (April); 55(2):121-125.
7. Jalalian E, Atashkar B, Rostami R. The Effect of Preparation design on the fracture resistance of Zir - conia crown copings (Computer associated design/computer asso-ciated machine, CAD/CAM system. J Dent (Tehran). 2011; 8(3):123-129.
8. Di Iorio D, Murmura G, Orsini G, Scarano A, Caputi S. Effect of margin design on the frac-ture resistance of procera All ceramic cores: An invitro stududy. J Contemp Dent Pract. 2008; 9(2):1-8.
9. De Jager N, Pallav P, Feilzer AJ. The influence of design parameters on the FEA-determined stress distribution in CAD/CAM produced All ceramic dental crown. Dent Mater. 2005 Mar; 21(3):242-51.
10. Cho L, Choi J, Jin Yi Y, Jin Park C. Effect of finish line variants on marginal accuracy and fracture strength of ceramic optimized polymer/ fiber-reinforced composite crowns. J Prosthet Dent. 2004 Jun;91(6):554-60.
11. Potiket N, Chiche G, Finger IM. In vitro fracture strength of teeth restored with different all-ceramic crown systems. J Prosthet Dent. 2004 Nov;92(5):491-5.
12. Kassem AS, Atta O, El-Mowafy O. Fatigue resistance and microleakage of CAD/CAM ceramic and composite molar crowns. J Prosthodont. 2012; 21(1):28-32.
13. Yeo I-S, Yang J-H, Lee J-B. In vitro marginal fit of three all-ceramic crown systems. J Prosthet Dent. 2003 Nov; 90(5):459-64.
14. Rammersberg P, Eickemeyer G, Pospiech P. Fracture resistance on posterior metal free pol-ymer crowns. J Prosthet Dent. 2000 Sep; 84(3): 303-308.
15. Scherrer SS, de Rijk KG. The fracture resistance of all ceramic crowns on supporting structure with different elastic moduli. Int J Prosthodont. 1993 Sep-Oct;6(5):462-7.
16. Ayad MF. Effect of the crown preparation mar-gin and die type on the marginal accuracy of Fiber-reinforced composite crowns. J Contemp Dent Pract. 2008 Feb; 9(2):9-16.
17. Gibbs CH, Anusavice KJ, Young HM, Jones JS, Esquivel-Upshaw JF. Maximum clenching force of patients with moderate loss of posterior tooth support: A pilot study. J Prosthet Dent. 2002 Nov; 88(5):498-502.
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Ahmadzadeh A, Golmohammadi F, Mousavi N. Effect of marginal design on fracture resistance of IPS e.maxall ceramic restorations: Chamfer versus shoulder finish lines. J Iran Dent Assoc 2015; 27 (2) :64-69
URL: http://jida.ir/article-1-1739-en.html
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Volume 27, Issue 2 (4-2015) Back to browse issues page
Journal of Iranian Dental Association

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