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Controlling the depth of ceramic veneer preparations by using a color marker in the depth grooves

2015; Elsevier BV; Volume: 114; Issue: 6 Linguagem: Inglês

10.1016/j.prosdent.2015.06.010

1097-6841

Matthias Kern, M. Oliver Ahlers,

Dental Research and COVID-19

Ceramic veneers are an established conservative treatment option for the restoration of facial defects, fractures, malformation, or misalignment of teeth.1Nattress B.R. Youngson C.C. Patterson C.J. Martin D.M. Ralph J.P. An in vitro assessment of tooth preparation for porcelain veneer restorations.J Dent. 1995; 23: 165-170Abstract Full Text PDF PubMed Scopus (48) Google Scholar, 2Brunton P.A. Wilson N.H. Preparations for porcelain laminate veneers in general dental practice.Br Dent J. 1998; 184: 553-556Crossref PubMed Scopus (24) Google Scholar, 3Brunton P.A. Richmond S. Wilson N.H. Variations in the depth of preparations for porcelain laminate veneers.Eur J Prosthodont Restor Dent. 1997; 5: 89-92PubMed Google Scholar Various clinical studies have determined successful treatments, and reviews have confirmed the clinically acceptable longevity of veneers.4Beier U.S. Kapferer I. Burtscher D. Dumfahrt H. Clinical performance of porcelain laminate veneers for up to 20 years.Int J Prosthodont. 2012; 25: 79-85PubMed Google Scholar, 5Peumans M. Van Meerbeek B. Lambrechts P. Vanherle G. Porcelain veneers: a review of the literature.J Dent. 2000; 28: 163-177Abstract Full Text Full Text PDF PubMed Scopus (345) Google Scholar, 6Shetty A. Kaiwar A. Shubhashini N. Ashwini P. Naveen D. Adarsha M. et al.Survival rates of porcelain laminate restoration based on different incisal preparation designs: an analysis.J Conserv Dent. 2011; 14: 10-15Crossref PubMed Google Scholar, 7Petridis H.P. Zekeridou A. Malliari M. Tortopidis D. Koidis P. Survival of ceramic veneers made of different materials after a minimum follow-up period of five years: a systematic review and meta-analysis.Eur J Esthet Dent. 2012; 7: 138-152PubMed Google Scholar Among the factors influencing the longevity of ceramic veneers are patient traits,8Della Bona A. Kelly J.R. A variety of patient factors may influence porcelain veneer survival over a 10-year period.J Evid Based Dent Pract. 2010; 10: 35-36Abstract Full Text Full Text PDF PubMed Scopus (10) Google Scholar the restorative materials and adhesive techniques used as determined in vivo7Petridis H.P. Zekeridou A. Malliari M. Tortopidis D. Koidis P. Survival of ceramic veneers made of different materials after a minimum follow-up period of five years: a systematic review and meta-analysis.Eur J Esthet Dent. 2012; 7: 138-152PubMed Google Scholar and in vitro,9Dumfahrt H. Gobel G. Bonding porcelain laminate veneer provisional restorations: An experimental study.J Prosthet Dent. 1999; 82: 281-285Abstract Full Text Full Text PDF PubMed Scopus (6) Google Scholar, 10Lacy A.M. Wada C. Du W. Watanabe L. In vitro microleakage at the gingival margin of porcelain and resin veneers.J Prosthet Dent. 1992; 67: 7-10Abstract Full Text PDF PubMed Scopus (39) Google Scholar, 11Lin T.M. Liu P.R. Ramp L.C. Essig M.E. Givan D.A. Pan Y.H. Fracture resistance and marginal discrepancy of porcelain laminate veneers influenced by preparation design and restorative material in vitro.J Dent. 2012; 40: 202-209Abstract Full Text Full Text PDF PubMed Scopus (41) Google Scholar, 12Kedici P.S. Kalipcilar B. Bilir O.G. Effect of glass ionomer liners on bonding strength of laminate veneers.J Prosthet Dent. 1992; 68: 29-32Abstract Full Text PDF PubMed Scopus (8) Google Scholar and preparation designs.5Peumans M. Van Meerbeek B. Lambrechts P. Vanherle G. Porcelain veneers: a review of the literature.J Dent. 2000; 28: 163-177Abstract Full Text Full Text PDF PubMed Scopus (345) Google Scholar, 6Shetty A. Kaiwar A. Shubhashini N. Ashwini P. Naveen D. Adarsha M. et al.Survival rates of porcelain laminate restoration based on different incisal preparation designs: an analysis.J Conserv Dent. 2011; 14: 10-15Crossref PubMed Google Scholar Preparation designs influence longevity by affecting the fracture toughness and furthermore through the preparation's effect on marginal integrity.5Peumans M. Van Meerbeek B. Lambrechts P. Vanherle G. Porcelain veneers: a review of the literature.J Dent. 2000; 28: 163-177Abstract Full Text Full Text PDF PubMed Scopus (345) Google Scholar, 7Petridis H.P. Zekeridou A. Malliari M. Tortopidis D. Koidis P. Survival of ceramic veneers made of different materials after a minimum follow-up period of five years: a systematic review and meta-analysis.Eur J Esthet Dent. 2012; 7: 138-152PubMed Google Scholar, 10Lacy A.M. Wada C. Du W. Watanabe L. In vitro microleakage at the gingival margin of porcelain and resin veneers.J Prosthet Dent. 1992; 67: 7-10Abstract Full Text PDF PubMed Scopus (39) Google Scholar, 11Lin T.M. Liu P.R. Ramp L.C. Essig M.E. Givan D.A. Pan Y.H. Fracture resistance and marginal discrepancy of porcelain laminate veneers influenced by preparation design and restorative material in vitro.J Dent. 2012; 40: 202-209Abstract Full Text Full Text PDF PubMed Scopus (41) Google Scholar, 13Hahn P. Gustav M. Hellwig E. An in vitro assessment of the strength of porcelain veneers dependent on tooth preparation.J Oral Rehabil. 2000; 27: 1024-1029Crossref PubMed Google Scholar, 14Hekimoglu C. Anil N. Yalcin E. A microleakage study of ceramic laminate veneers by autoradiography: effect of incisal edge preparation.J Oral Rehabil. 2004; 31: 265-269Crossref PubMed Google Scholar, 15Segura A. Donly K.J. Croll T.P. The effect of polymerization shrinkage during veneer placement.Quintessence Int. 1992; 23: 629-632PubMed Google Scholar, 16Sim C. Neo J. Chua E.K. Tan B.Y. The effect of dentin bonding agents on the microleakage of porcelain veneers.Dent Mater. 1994; 10: 278-281Abstract Full Text PDF PubMed Scopus (21) Google Scholar, 17Stappert C.F. Ozden U. Att W. Gerds T. Strub J.R. Marginal accuracy of press-ceramic veneers influenced by preparation design and fatigue.Am J Dent. 2007; 20: 380-384PubMed Google Scholar, 18Wat P.Y. Cheung G.S. Kei L.H. An improved preparation for indirect porcelain veneers.Dent Update. 1993; 20: 72-76PubMed Google Scholar, 19Dumfahrt H. Schäffer H. Porcelain laminate veneers. A retrospective evaluation after 1 to 10 years of service. Part II. Clinical results.Int J Prosthodont. 2000; 13: 9-18PubMed Google Scholar Marginal integrity, in turn, is dependent on dentin exposure in the margins of veneer preparations. This may lead to increased marginal leakage at the composite resin-dentin interface.16Sim C. Neo J. Chua E.K. Tan B.Y. The effect of dentin bonding agents on the microleakage of porcelain veneers.Dent Mater. 1994; 10: 278-281Abstract Full Text PDF PubMed Scopus (21) Google Scholar, 20Zaimoglu A. Karaagaclioglu L. Uctasli. Influence of porcelain material and composite luting resin on microleakage of porcelain laminate veneers.J Oral Rehabil. 1992; 19: 319-327Crossref PubMed Scopus (14) Google Scholar, 21Ferrari M. Patroni S. Balleri P. Measurement of enamel thickness in relation to reduction for etched laminate veneers.Int J Periodontics Restorative Dent. 1992; 12: 407-413PubMed Google Scholar Consequently, veneer preparations should, apart from other considerations, be restricted to the enamel, especially at the margins of the preparation.21Ferrari M. Patroni S. Balleri P. Measurement of enamel thickness in relation to reduction for etched laminate veneers.Int J Periodontics Restorative Dent. 1992; 12: 407-413PubMed Google Scholar Also, the depth of the preparation should allow for a thickness of ceramic of 0.6 mm in the maxilla22Kunzelmann K.H. Kern M. Pospiech P. Raigrodski A.J. Strassler H.E. Mehl A. et al.All-ceramics at a glance.in: Introduction to indication, material selection, preparation and instertion of all-ceramic restorations. First English ed. Society for Dental Ceramics, Ettlingen, Germany2007Google Scholar and a thickness of between 0.3 and 0.4 mm ("thin veneers") in the mandible if state-of-the-art ceramic materials are being used.22Kunzelmann K.H. Kern M. Pospiech P. Raigrodski A.J. Strassler H.E. Mehl A. et al.All-ceramics at a glance.in: Introduction to indication, material selection, preparation and instertion of all-ceramic restorations. First English ed. Society for Dental Ceramics, Ettlingen, Germany2007Google Scholar, 23Ge C. Green C.C. Sederstrom D. McLaren E.A. White S.N. Effect of porcelain and enamel thickness on porcelain veneer failure loads in vitro.J Prosthet Dent. 2014; 111: 380-387Abstract Full Text Full Text PDF PubMed Scopus (18) Google Scholar, 24Schmitter M. Seydler B.B. Minimally invasive lithium disilicate ceramic veneers fabricated using chairside CAD/CAM: a clinical report.J Prosthet Dent. 2012; 107: 71-74Abstract Full Text Full Text PDF PubMed Scopus (18) Google Scholar The question remains as to how these requirements can be met. Existing studies have determined that even experienced operators, when using a freehand technique, tend to remove more cervical enamel and less incisal enamel than appropriate.1Nattress B.R. Youngson C.C. Patterson C.J. Martin D.M. Ralph J.P. An in vitro assessment of tooth preparation for porcelain veneer restorations.J Dent. 1995; 23: 165-170Abstract Full Text PDF PubMed Scopus (48) Google Scholar Grooves cut as depth guides proved to be inferior, whereas dimples cut with the side of a round instrument as depth guides were superior to the freehand technique.25Cherukara G.P. Seymour K.G. Zou L. Samarawickrama D.Y. Geographic distribution of porcelain veneer preparation depth with various clinical techniques.J Prosthet Dent. 2003; 89: 544-550Abstract Full Text Full Text PDF PubMed Scopus (16) Google Scholar Other authors have investigated the use of special depth gauge instruments for controlling the depth of veneer preparations and concluded that the use of these depth gauge instruments should be considered.26Brunton P.A. Aminian A. Wilson N.H. Tooth preparation techniques for porcelain laminate veneers.Br Dent J. 2000; 189: 260-262PubMed Google Scholar In this article, a procedure is described that controls the depth of the grooves with color marking. 1.Make a trial restoration of the planned veneers by using a silicone index and composite resin.2.Use a depth gauge rotary instrument (No. 834, cutting depth 0.3 to 0.5 mm; Komet Dental) to cut 3 shallow orientation grooves through the trial restorations and/or enamel on the labial tooth surfaces (Fig. 1A).3.Remove the trial restoration and mark the depth of the orientation grooves with a water-resistant red felt-tip pen (Multimark 1513 permanent F; Faber-Castell) (Fig. 1B).4.Use chamfered diamond rotary instruments (Nos. 868B, 868, 8868; Komet Dental) for definitive contouring and finishing of the preparation (Fig. 2A).Figure 2A, Definitive contouring and finishing with chamfered diamond instruments. B, During finishing, do not remove red color marking completely.View Large Image Figure ViewerDownload Hi-res image Download (PPT)5.During the finishing of the preparation, do not remove the red color marking completely (Fig. 2A), to ensure no more than the desired amount of enamel is removed in the contouring and finishing process.6.Remove the red color marking with a cotton pellet soaked in 70% isopropanol and make the impression.