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The Effect of Finish Line Design on the Fracture Strength of Zirconia Copings | ||
| Journal of Dentistry | ||
| مقاله 7، دوره 20، شماره 4 - شماره پیاپی 65، اسفند 2019، صفحه 271-275 اصل مقاله (382.74 K) | ||
| نوع مقاله: Original Article | ||
| شناسه دیجیتال (DOI): 10.30476/dentjods.2019.77720. | ||
| نویسندگان | ||
| Zahra Hashemi Ardakani1؛ Sahar Khorsandipour2؛ Mina Mohghegh* 1؛ Seyed Ahmad Ghoreishian1؛ Amir Ali Reza Khaledi1 | ||
| 1Dept. of Prosthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran. | ||
| 2Undergraduate Student of Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran. | ||
| چکیده | ||
| Statement of the Problem: One of the major concerns about all ceramic crowns is their fracture resistance. Purpose: The purpose of this in vitro study was to evaluate the effect of two marginal designs (shoulder 90°, shoulder 135°) on the fracture resistance of zirconia copings. Materials and Method: In this in vitro study, 20 brass dies were prepared using milling machine: 10 with 1mm width shoulder 90° marginal design and the other 10 with 1mm width shoulder 135° finish line design. Zirconia cores with 0.5mm thickness and 30μm cement space were fabricated on brass dies. The copings were cemented on the dies and fracture test was done using a universal testing machine. Data were analyzed using Mann-Whitney test. Results: The mean value of fracture resistance for shoulder 90° finish line design were 368.3±109.4 N and for shoulder 135° finish line design were 518.4±115.5 N. Data analysis revealed a statistically significant difference between groups (p < 0.05). Conclusion: The results of this study showed that the finish line design of zirconia copings influences their fracture resistance. A 135° shoulder finish line design can improve the fracture resistance of zirconia crowns. | ||
| کلیدواژه‌ها | ||
| Zirconia ● Preparation ● Fracture Strength ● CAD/CAM | ||
| مراجع | ||
|
1. Ferracane JL. Using posterior composites appropriately. J Am Dent Assoc. 1992; 123: 53–58. [PubMed] [Google Scholar]
2. Etemadi S, Smales RJ. Survival of resin-bonded porcelain veneer crowns placed with and with-out metal reinforcement. J Dent. 2006; 34: 139–145. [PubMed] [Google Scholar]
3. McLaren EA, White SN. Survival of In-Ceram crowns in a private practice: a prospective clinical trial. J Prosthet Dent. 2000; 83: 216–222. [PubMed] [Google Scholar]
4. Webber B, McDonald A, Knowles J. An in vitro study of the compressive load at fracture of Procera AllCeram crowns with varying thickness of veneer porcelain. J Prosthet Dent. 2003; 89: 154–160. [PubMed] [Google Scholar]
5. Jalalian E, Atashkar B, Rostami R. The effect of preparation design on the fracture resistance of zirconiacrown copings (computer associated design/ computer associated machine, CAD/CAM system) J Dent (Tehran) 2011; 8: 123–129. [PMC free article] [PubMed] [Google Scholar]
6. Jalalian E, Aletaha NS. 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; 55: 121–125. [PubMed] [Google Scholar]
7. Ahmadzade A, Golmohammadi F. Comparison of fracture resistance in two marginal design in IPS Emax restorations. J Mash Dent Sch. 2015; 39: 109–116. [Google Scholar]
8. Cho L, Choi J, Yi YJ, Park CJ. Effect of finish line variants on marginal accuracy and fracture strength of ceramic optimized polymer/fiber-reinforced composite crowns. J Prosthet Dent. 2004; 91: 554–560. [PubMed] [Google Scholar]
9. Di*Iorio D, Murmura G, Orsini G, Scarano A, Caputi S. Effect of margin design on the fracture resistance of Procera all ceram cores: an in vitro study. J Contemp Dent Pract. 2008; 9: 1–8. [PubMed] [Google Scholar]
10. Sadan A, Blutz MB, Lang B. Clinical consideration for densly sintered alumina and zirconia restorations. Part1. International Journal of Periodontics and Restorative Dentistry. 2005; 25: 213–219. [PubMed] [Google Scholar]
11. Beuer F, Aggstaller H, Edelhoff D, Gernet W. Effect of preparation design on the fracture resistance of zirconiacrown copings. Dent Mater J. 2008; 27: 362–367. [PubMed] [Google Scholar]
12. Shinya A, Lassila LV, Vallittu PK. The effect of preparation design on the marginal stress of resin-bonded metal-free crowns: a finite element study. Int J Prosthodont. 2008; 21: 445–447. [PubMed] [Google Scholar]
13. Reich S, Petschelt A, Lohbauer U. The effect of finish line preparation and layer thickness on the failure loadand fractography of ZrO2 copings. J Prosthet Dent. 2008; 99: 369–376. [PubMed] [Google Scholar]
14. Jalali H, Sadighpour L, Miri A, Shamshiri AR. Comparison of Marginal Fit and Fracture Strength of a CAD/CAM Zirconia Crown with Two Preparation Designs. J Dent (Tehran) 2015; 12: 874–881. [PMC free article] [PubMed] [Google Scholar]
15. Monaco C, Rosentritt M, Llukacej A, Baldissara P, Scotti R. Margin-al Adaptation, Gap Width, and facture strength of teeth Restored with different all-ceramic Vs Metal Ceramic Crown Systems: An in Vitro Study. Eur J Prosthodont Restor Dent. 2016; 24: 130–137. [PubMed] [Google Scholar]
16. Shillinburg HT. Fundamentals of fixed prosthodontics. 4th ed. Quintessence: USA; 2012. p. 142. [Google Scholar]
17. Vojdani M, Safari A, Mohaghegh M, Pardis S, Mahdavi F. The effect of porcelain firing and type of finish line on the marginal fit of zirconia copings. J Dent (Shiraz) 2015; 16: 113–120. [PMC free article] [PubMed] [Google Scholar]
18. Fujimoto J, Land MF, Rosensteil SF. Contemporary fixed prosthodontics. 4th ed. Mosby Elsevier: USA; 2006. p. 324. [Google Scholar] | ||
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