1Assistant Lecturer of Fixed Prosthodontics, Conservative Dentistry Department, Faculty of Dentistry, Alexandria University; Champlion St. 21131, Alexandria, Egypt.
2Professor of Fixed Prosthodontics, Conservative Dentistry Department, Faculty of Dentistry, Alexandria University; Champlion St. 21131, Alexandria, Egypt.
3Professor of Dental Biomaterials, Department of Dental Biomaterials, Faculty of Dentistry, Alexandria University; Champlion St. 21131, Alexandria, Egypt.
4Department of Surgical and Integrated Diagnostics, University of Genoa; Largo R. Benzi, 10 - 16132 Genoa, Italy
5Associate Professor, Dean of Laser Department Center, Department of Surgical and Integrated Diagnostics, University of Genoa; Largo R. Benzi, 10 - 16132 Genoa, Italy.
Abstract
Introduction: Inlay-retained fixed partial dentures (IRFPDs) have been proposed as a more conservative method for replacing missing dentition instead of the more destructive full crown preparation. Various studies have been conducted on the flexural strength of such restorations; however, there is a lack of evidence on their marginal integrity. Objectives: Evaluating the marginal integrity of three IRFPD designs fabricated using monolithic translucent zirconia. Materials and methods: Thirty IRFPDs were fabricated using a translucent monolithic zirconia (Katana STML) and divided randomly into 3 groups according to the cavity design. Group 1 received an inlay cavity preparation including a proximal box and a 2 mm deep occlusal extension, Group 2 received an inlay cavity preparation including a proximal box and a 1.5 mm deep occlusal extension, and Group 3 received only a proximal box cavity preparation without an occlusal extension. The restorations were fabricated and cemented using a dual cure resin cement (Panavia V5 system) and subjected to an equivalent of 5 years of ageing. A dye penetration test was performed on the specimens, and the values of marginal penetration were analyzed under a stereomicroscope. Results:During the whole 5-year ageing process, no specimens showed signs of cracking, fracture or loss of retention in any or the restorations. There was a significant difference between the marginal leakages values obtained in the 3 groups of the study (H=10.208, p < 0.05). Comparing the groups of the study showed significant difference in marginal leakage between Group 1 and Group 3 (p < 0.05). Conclusions: The margins of inlay-retained fixed partial dentures performed well after ageing with recommended bonding protocols for zirconia. Inlay cavity design including a proximal box and an occlusal extension exhibited better marginal stability than proximal box without any occlusal extension
1-Thompson M, Thompson K, Swain M. The all‐ceramic, inlay supported fixed partial denture. Part 1. Ceramic inlay preparation design: a literature review. Australian dental journal. 2010;55:120-7.
2-Manicone PF, Iommetti PR, Raffaelli L. An overview of zirconia ceramics: basic properties and clinical applications. J Dent. 2007;35:819-26.
3-Sundh A, Molin M, Sjögren G. Fracture resistance of yttrium oxide partially-stabilized zirconia all-ceramic bridges after veneering and mechanical fatigue testing. Dent Mater. 2005;21:476-82.
4-Tara MA, Eschbach S, Wolfart S, Kern M. Zirconia ceramic inlay-retained fixed dental prostheses–first clinical results with a new design. Journal of Dentistry. 2011;39:208-11.
5-Klimke J, Trunec M, Krell A. Transparent tetragonal yttria‐stabilized zirconia ceramics: influence of scattering caused by birefringence. Journal of the American Ceramic Society. 2011;94:1850-8.
6-Zhang Y. Making yttria-stabilized tetragonal zirconia translucent. Dent Mater. 2014;30:1195-203.
7-Chaiyabutr Y, McGowan S, Phillips KM, Kois JC, Giordano RA. The effect of hydrofluoric acid surface treatment and bond strength of a zirconia veneering ceramic. J Prosthet Dent. 2008;100:194-202.
8-Amaral R, Özcan M, Bottino MA, Valandro LF. Microtensile bond strength of a resin cement to glass infiltrated zirconia-reinforced ceramic: the effect of surface conditioning. Dent Mater. 2006;22:283-90.
9-Blatz MB, Chiche G, Holst S, Sadan A. Influence of surface treatment and simulated aging on bond strengths of luting agents to zirconia. Quintessence Int. 2007;38:745- 53.
10-Yoshida K, Tsuo Y, Atsuta M. Bonding of dual-cured resin cement to zirconia ceramic using phosphate acid ester monomer and zirconate coupler. Journal of Biomedical Materials Research Part B: Applied Biomaterials. 2006;77B:28-33.
11-Kern M. Bonding to oxide ceramics—laboratory testing versus clinical outcome. Dent Mater. 2015;3:8-14.
12-Harder S, Wolfart S, Eschbach S, Kern M. Eight-year outcome of posterior inlay-retained all-ceramic fixed dental prostheses. Journal of Dentistry. 2010;38:875-81.
13-Magne P, Perakis N, Belser UC, Krejci I. Stress distribution of inlay-anchored adhesive fixed partial dentures: a finite element analysis of the influence of restorative materials and abutment preparation design. J Prosthet Dent. 2002;87:516-28.
14-Iglesia-Puig MA, Arellano-Cabornero A. Inlay fixed partial denture as a conservative approach for restoring posterior missing teeth: a clinical report. J Prosthet Dent. 2003;89(5):443-5.
15-Wolfart S, Ludwig K, Uphaus A, Kern M. Fracture strength of all-ceramic posterior inlay-retained fixed partial dentures. Dent Mater. 2007;23:1513-20.
16-Ohlmann B, Gabbert O, Schmitter M, Gilde H, Rammelsberg P. Fracture resistance of the veneering on inlay-retained zirconia ceramic fixed partial dentures. Acta Odontol Scand. 2005;63:335-42.
17-Chen J, Cai H, Suo L, Xue Y, Wang J, Wan Q. A systematic review of the survival and complication rates of inlay-retained fixed dental prostheses. Journal of dentistry. 2017;59:2-10.
18-Kılıçarslan MA, Kedici PS, Küçükeşmen HC, Uludağ BC. In vitro fracture resistance of posterior metal-ceramic and all-ceramic inlay-retained resin-bonded fixed partial dentures. J Prosthet Dent. 2004;92:365-70.
19-Puschmann D, Wolfart S, Ludwig K, Kern M. Load‐ bearing capacity of all‐ceramic posterior inlay‐retained fixed dental prostheses. European journal of oral sciences. 2009;117:312-8.
20-El-Mowafy O, Rubo MH. Retention of a posterior resinbonded fixed partial denture with a modified design: an in vitro study. Int J Prosthodont. 2000;13:425-31.
21-Brito-Junior M, Braga NMA, Rodrigues DC, Camilo CC, Faria-e-Silva AL. Effect of the simulated periodontal ligament on cast post-and-core removal using an ultrasonic device. J Appl Oral Sci. 2010;18:528-32.
22-Monaco C, Krejci I, Bortolotto Ibarra T, Perakis N, Ferrari M, Scotti R. Marginal adaptation of 1 fiber-reinforced composite and 2 all-ceramic inlay fixed partial denture systems. Int J Prosthodont. 2006;19:373-82.
23-Tjan AH, Dunn JR, Grant BE. Marginal leakage of cast gold crowns luted with an adhesive resin cement. J Prosthet Dent. 1992;67:11-5.
24-Duquia R, Osinaga P, Demarco F, Habekost L, Conceição E. Cervical microleakage in MOD restorations: in vitro comparison of indirect and direct composite. Operative dentistry. 2006;31:682-7.
25-Thompson M, Field C, Swain M. The all‐ceramic, inlay supported fixed partial denture. Part 2. Fixed partial denture design: a finite element analysis. Australian dental journal. 2011;56:302-11.
26-Hahn P, Attin T, Gröfke M, Hellwig E. Influence of resin cement viscosity on microleakage of ceramic inlays. Dent Mater. 2001;17:191-6.