Cho, Seok-Hwan

Nagy, William W.

English

epublications@Marquette

Marquette Universitye-Publications@MarquetteSchool of Dentistry Faculty Research andPublications Dentistry, School of6-1-2015Morphologic Custom Shade Guide Fabricatedwith Feldspathic CeramicSeok-Hwan ChoMarquette University, seokhwan.cho@marquette.eduWilliam W. NagyTexas A&M Health Science CenterAccepted version. The Journal of Prosthetic Dentistry, Vol. 113, No. 6 ( June 2015): 660-661. DOI. ©2015 Editorial Council for the Journal of Prosthetic Dentistry. Used with permission.NOTICE: this is the author’s version of a work that was accepted for publication in The Journal ofProsthetic Dentistry. Changes resulting from the publishing process, such as peer review, editing,corrections, structural formatting, and other quality control mechanisms may not be reflected in thisdocument. Changes may have been made to this work since it was submitted for publication. Adefinitive version was subsequently published in The Journal of Prosthetic Dentistry, Vol. 113, No. 6( June 2015): 660-661. DOI.NOT THE PUBLISHED VERSION; this is the author’s final, peer-reviewed manuscript. The published version may be accessed by following the link in the citation at the bottom of the page. The Journal of Prosthetic Dentistry, Vol 113, No. 6 (June 2015): pg. 660-661. DOI. This article is © Elsevier and permission has been granted for this version to appear in e-Publications@Marquette. Elsevier does not grant permission for this article to be further copied/distributed or hosted elsewhere without the express permission from Elsevier. 1    Morphologic Custom Shade Guide Fabricated with Feldspathic Ceramic Presented as A Table Clinic at The 39th Annual Session of the American College of Prosthodontists, San Diego, Calif, November 2009.   Seok-Hwan Cho School of Dentistry, Marquette University Milwaukee, WI William W. Nagy Department of Restorative Sciences, Baylor College of Dentistry, Texas A&M Health Science Center, Dallas, Texas    Clinicians have successfully used commercial shade guides for many years. However, many studies have demonstrated the inadequacies of the existing shade guides: shade variations exist between different batches of porcelain from the same manufacturer, and the thickness of the shade guide tooth is different from the real tooth or may not have the correct core or backing.1, 2 and 3 In addition, the actual porcelains may not match the shade guides’ tabs.4 NOT THE PUBLISHED VERSION; this is the author’s final, peer-reviewed manuscript. The published version may be accessed by following the link in the citation at the bottom of the page. The Journal of Prosthetic Dentistry, Vol 113, No. 6 (June 2015): pg. 660-661. DOI. This article is © Elsevier and permission has been granted for this version to appear in e-Publications@Marquette. Elsevier does not grant permission for this article to be further copied/distributed or hosted elsewhere without the express permission from Elsevier. 2  One answer to these problems is to fabricate a customized shade guide from the actual ceramic materials.5, 6, 7, 8, 9 and 10 However, most customized tabs do not resemble the tooth morphology. Reed11 indicated the significance of the geometric design of a tab for shade matching. Thus, the purpose of this article was to demonstrate how to fabricate a morphologically correct custom shade guide. Procedure 1. Make an irreversible hydrocolloid impression (Jeltrate Plus; Dentsply Caulk) of an ivorine maxillary right central incisor tooth (dental study model; Nissin Dental Products Inc) for duplication. Then, inject polyvinyl siloxane (PVS) impression material (Aquasil Ultra Smart Wetting XLV; Dentsply Intl) into the irreversible hydrocolloid impression to duplicate the PVS tooth. 2. Make small, phosphate-bonded refractory die material (12×12×6-mm G-Cera Orbit Vest; GC America) trays that have indentations inside for retention (Fig. 1A).   Figure 1. A, Stone tray with phosphate-bonded refractory die. B, Duplicated PVS tooth placed on refractory stone tray over auxiliary firing pastes. C, After removing PVS tooth out of refractory stone tray. PVS, polyvinyl siloxane.  3. Squeeze auxiliary firing pastes (IPS Object Fix putty; Ivoclar Vivadent) on the refractory tray. Then press the duplicated PVS tooth onto the firing pastes to form the intaglio of the tooth (Fig. 1B). Remove the silicone tooth gently (Fig. 1C). 4. Place the refractory tray in a microwave (model RMW733, 0.7 cu ft; RCA Co) for 30 seconds to harden the firing paste. 5. Apply feldspathic porcelain to the intaglio area of the firing paste on the refractory tray and fire it in a porcelain oven (Pro 100; NOT THE PUBLISHED VERSION; this is the author’s final, peer-reviewed manuscript. The published version may be accessed by following the link in the citation at the bottom of the page. The Journal of Prosthetic Dentistry, Vol 113, No. 6 (June 2015): pg. 660-661. DOI. This article is © Elsevier and permission has been granted for this version to appear in e-Publications@Marquette. Elsevier does not grant permission for this article to be further copied/distributed or hosted elsewhere without the express permission from Elsevier. 3  Whip Mix Corp). After glazing, finishing, and polishing, holders can be made (Fig. 2).   Figure 2. Morphologic custom shade guide of Vita Omega 900. References 1 J.D. Preston. Current status of shade selection and color matching. Quintessence Int, 16 (1985), pp. 47–58 2 K.A. King, W.G. deRijk. Variation of L*a*b* value among Vitapan Classical shade guides. J Prosthodont, 16 (2007), pp. 352–356 3 W.J. O’Brien, K.M. Boenke, C.L. Groh. Coverage errors of two shade guides. Int J Prosthodont, 4 (1991), pp. 45–50 4 C.L. Groh, W.J. O'Brien, K.M. Boenke. Differences in color between fired porcelain and shade guides. Int J Prosthodont, 5 (1992), pp. 510–514 5 S. Wieder. Custom shade guide system for composite resins. J Esthet Dent, 2 (1990), pp. 10–12 6 L. Seluk, T. Lalonde. Esthetics and communication with a custom shade guide. Dent Clin North Am, 29 (1985), pp. 741–751 7 R. Schwartz. Evaluation of a custom porcelain-fused-to-metal shade guide. Quintessence Int, 17 (1986), pp. 181–184 NOT THE PUBLISHED VERSION; this is the author’s final, peer-reviewed manuscript. The published version may be accessed by following the link in the citation at the bottom of the page. The Journal of Prosthetic Dentistry, Vol 113, No. 6 (June 2015): pg. 660-661. DOI. This article is © Elsevier and permission has been granted for this version to appear in e-Publications@Marquette. Elsevier does not grant permission for this article to be further copied/distributed or hosted elsewhere without the express permission from Elsevier. 4  8 S. Askins, D. Kaiser. Technique for making a customized shade guide. J Prosthet Dent, 42 (1979), pp. 234–235 9 O. Ware. Customized shade guide. J Prosthet Dent, 52 (1984), pp. 449–450 10 P. Millstein. Customized shade guide for denture construction. J Prosthet Dent, 52 (1984), p. 901 11 T.L. Reed. Techniques for porcelain shade consistency. Quintessence Dent Technol, 9 (1985), pp. 27–28  Corresponding author: Dr Seok-Hwan Cho, Marquette University School of Dentistry, PO Box 1881, Milwaukee, WI 53201-1881  

Morphologic Custom Shade Guide Fabricated with Feldspathic Ceramic

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Morphologic Custom Shade Guide Fabricated with Feldspathic Ceramic

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