J Adv Prosthodont.  2017 Feb;9(1):1-13. 10.4047/jap.2017.9.1.1.

Comparison of the fit of cast gold crowns fabricated from the digital and the conventional impression techniques

Affiliations
  • 1Department of Prosthodontics, School of Dentistry, Pusan National University, Yangsan, Republic of Korea. p-venus79@hanmail.net

Abstract

PURPOSE
The purpose of this study was to compare the fit of cast gold crowns fabricated from the conventional and the digital impression technique.
MATERIALS AND METHODS
Artificial tooth in a master model and abutment teeth in ten patients were restored with cast gold crowns fabricated from the digital and the conventional impression technique. The forty silicone replicas were cut in three sections; each section was evaluated in nine points. The measurement was carried out by using a measuring microscope and I-Soultion. Data from the silicone replica were analyzed and all tests were performed with α-level of 0.05.
RESULTS
1. The average gaps of cast gold crowns fabricated from the digital impression technique were larger than those of the conventional impression technique significantly. 2. In marginal and internal axial gap of cast gold crowns, no statistical differences were found between the two impression techniques. 3. The internal occlusal gaps of cast gold crowns fabricated from the digital impression technique were larger than those of the conventional impression technique significantly.
CONCLUSION
Both prostheses presented clinically acceptable results with comparing the fit. The prostheses fabricated from the digital impression technique showed more gaps, in respect of occlusal surface.

Keyword

Fit; Crown; Digital; Conventional; Impression

MeSH Terms

Crowns*
Humans
Prostheses and Implants
Silicon
Silicones
Tooth
Tooth, Artificial
Silicon
Silicones

Figure

  • Fig. 1 Artificial tooth preparation and master model fabrication.

  • Fig. 2 Using (A) the conventional impression technique (B and C) gypsum models fabricated in a master model.

  • Fig. 3 Using (A) the conventional impression technique (B) gypsum model fabricated in a patient.

  • Fig. 4 Using (A) the digital impression technique (B and C) polyurethane models fabricated in a master model.

  • Fig. 5 Using (A) the digital impression technique (B) polyurethane model fabricated in a patient.

  • Fig. 6 Cast gold crowns fabricated from the conventional (left) and digital (right) impression techniques: (A) in a master model and (B) in a patient.

  • Fig. 7 Cut silicone replicas of the cast gold crown: (A) in the buccolingual direction and (B) in the mesiodistal direction.

  • Fig. 8 Measurement points of the thickness of the silicone replica: (A) in the buccolingual direction (capital letter: mesial, and lowercase letter: distal) and (B) in the mesiodistal direction.; absolute marginal discrepancy (A, I, a, i, 1, and 9), the distance between the restoration margin and the abutment margin: internal marginal gap (B, H, b, h, 2, and 8), the perpendicular distance between the restoration and the tooth surface in the marginal-axial plane transition area: internal axial gap (C, G, c, g, 3, and 7), the perpendicular distance between the inner wall of the restoration and the tooth in center of the axial plane: occlusal gap (D, E, F, d, e, f, 4, 5, and 6), the perpendicular distance between the inner wall of the restoration and the tooth in occlusal surface quadrisection points.

  • Fig. 9 Captured figures after sectioning in the buccolingual direction using a digital microscope camera: (A) the margin, (B) the axial surface, and (C) the occlusal surface. (Magnification: ×100)


Cited by  1 articles

Comparison of the accuracy of digital impressions and traditional impressions: Systematic review
Kyoung-Rok Kim, Kweonsoo Seo, Sunjai Kim
J Korean Acad Prosthodont. 2018;56(3):258-268.    doi: 10.4047/jkap.2018.56.3.258.


Reference

1. Miyazaki T, Hotta Y, Kunii J, Kuriyama S, Tamaki Y. A review of dental CAD/CAM: current status and future perspectives from 20 years of experience. Dent Mater J. 2009; 28:44–56.
2. Christensen GJ. The state of fixed prosthodontic impressions: room for improvement. J Am Dent Assoc. 2005; 136:343–346.
3. Christensen GJ. Impressions are changing: deciding on conventional, digital or digital plus in-office milling. J Am Dent Assoc. 2009; 140:1301–1304.
4. Mörmann WH. The evolution of the CEREC system. J Am Dent Assoc. 2006; 137:7S–13S.
5. Lowe RA. CAD/CAM dentistry and chairside digital impression making.Dental economics supplement September 2009. Available from: http://www.ineedce.com.
6. Henkel GL. A comparison of fixed prostheses generated from conventional vs digitally scanned dental impressions. Compend Contin Educ Dent. 2007; 28:422–424. 426–428. 430–431.
7. Garg AK. Cadent iTero’s digital system for dental impressions: the end of trays and putty? Dent Implantol Update. 2008; 19:1–4.
8. Schwartz IS. A review of methods and techniques to improve the fit of cast restorations. J Prosthet Dent. 1986; 56:279–283.
9. Felton DA, Kanoy BE, Bayne SC, Wirthman GP. Effect of in vivo crown margin discrepancies on periodontal health. J Prosthet Dent. 1991; 65:357–364.
10. Grasso JE, Nalbandian J, Sanford C, Bailit H. Effect of restoration quality on periodontal health. J Prosthet Dent. 1985; 53:14–19.
11. Richter WA, Ueno H. Relationship of crown margin placement to gingival inflammation. J Prosthet Dent. 1973; 30:156–161.
12. Schwartz NL, Whitsett LD, Berry TG, Stewart JL. Unserviceable crowns and fixed partial dentures: life-span and causes for loss of serviceability. J Am Dent Assoc. 1970; 81:1395–1401.
13. Karlsson S. A clinical evaluation of fixed bridges, 10 years following insertion. J Oral Rehabil. 1986; 13:423–432.
14. Council on dental materials and devices. Revised American national standards institute/American dental association specification no. 8 for zinc phosphate cement. J Am Dent Assoc. 1978; 96:121–123.
15. Sorensen SE, Larsen IB, Jörgensen KD. Gingival and alveolar bone reaction to marginal fit of subgingival crown margins. Scand J Dent Res. 1986; 94:109–114.
16. Christensen GJ. Marginal fit of gold inlay castings. J Prosthet Dent. 1966; 16:297–305.
17. Ostlund LE. Cavity design and mathematics: their effect on gaps at the margins of cast restorations. Oper Dent. 1985; 10:122–137.
18. McLean JW, von Fraunhofer JA. The estimation of cement film thickness by an in vivo technique. Br Dent J. 1971; 131:107–111.
19. McLean JW. Polycarboxylate cements. Five years' experience in general practice. Br Dent J. 1972; 132:9–15.
20. Gulker I. Margins. NY State Dent J. 1985; 51:213–215. 217
21. Kydd WL, Nicholls JI, Harrington G, Freeman M. Marginal leakage of cast gold crowns luted with zinc phosphate cement: an in vivo study. J Prosthet Dent. 1996; 75:9–13.
22. Wettstein F, Sailer I, Roos M, Hämmerle CH. Clinical study of the internal gaps of zirconia and metal frameworks for fixed partial dentures. Eur J Oral Sci. 2008; 116:272–279.
23. White SN, Kipnis V. The three-dimensional effects of adjustment and cementation on crown seating. Int J Prosthodont. 1993; 6:248–254.
24. Grajower R, Zuberi Y, Lewinstein I. Improving the fit of crowns with die spacers. J Prosthet Dent. 1989; 61:555–563.
25. Syrek A, Reich G, Ranftl D, Klein C, Cerny B, Brodesser J. Clinical evaluation of all-ceramic crowns fabricated from intraoral digital impressions based on the principle of active wavefront sampling. J Dent. 2010; 38:553–559.
26. Reich S, Wichmann M, Nkenke E, Proeschel P. Clinical fit of all-ceramic three-unit fixed partial dentures, generated with three different CAD/CAM systems. Eur J Oral Sci. 2005; 113:174–179.
27. Rekow ED. High-technology innovations-and limitations-for restorative dentistry. Dent Clin North Am. 1993; 37:513–524.
28. Tinschert J, Natt G, Mautsch W, Spiekermann H, Anusavice KJ. Marginal fit of alumina-and zirconia-based fixed partial dentures produced by a CAD/CAM system. Oper Dent. 2001; 26:367–374.
29. Carter JM, Sorensen SE, Johnson RR, Teitelbaum RL, Levine MS. Punch shear testing of extracted vital and endodontically treated teeth. J Biomech. 1983; 16:841–848.
30. Strawn SE, White JM, Marshall GW, Gee L, Goodis HE, Marshall SJ. Spectroscopic changes in human dentine exposed to various storage solutions-short term. J Dent. 1996; 24:417–423.
31. Gemalmaz D, Alkumru HN. Marginal fit changes during porcelain firing cycles. J Prosthet Dent. 1995; 73:49–54.
32. Hamaguchi H, Cacciatore A, Tueller VM. Marginal distortion of the porcelain- bonded-to-metal complete crown: an SEM study. J Prosthet Dent. 1982; 47:146–153.
33. Wang CJ, Millstein PL, Nathanson D. Effects of cement, cement space, marginal design, seating aid materials, and seating force on crown cementation. J Prosthet Dent. 1992; 67:786–790.
34. Seong JY, Jeon YC, Jeong CM, Lim JS. The fit of a zirconia core fabricated with the CAD/CAM system. J Korean Acad Prosthodont. 2004; 42:489–500.
35. Gardner FM. Margins of complete crowns-literature review. J Prosthet Dent. 1982; 48:396–400.
36. Fusayama T, Ide K, Hosoda H. Relief of resistance of cement of full cast crowns. J Prosthet Dent. 1964; 14:95–106.
37. Eames WB, O'Neal SJ, Monteiro J, Miller C, Roan JD Jr, Cohen KS. Techniques to improve the seating of castings. J Am Dent Assoc. 1978; 96:432–437.
38. Weaver JD, Johnson GH, Bales DJ. Marginal adaptation of castable ceramic crowns. J Prosthet Dent. 1991; 66:747–753.
39. White SN, Yu Z, Kipnis V. Effect of seating force on film thickness of new adhesive luting agents. J Prosthet Dent. 1992; 68:476–481.
40. Brukl CE, Nicholson JW, Norling BK. Crown retention and seating on natural teeth with a resin cement. J Prosthet Dent. 1985; 53:618–622.
41. Syu JZ, Byrne G, Laub LW, Land MF. Influence of finish-line geometry on the fit of crowns. Int J Prosthodont. 1993; 6:25–30.
42. Pera P, Gilodi S, Bassi F, Carossa S. In vitro marginal adaptation of alumina porcelain ceramic crowns. J Prosthet Dent. 1994; 72:585–590.
43. Sorensen JA. A standardized method for determination of crown margin fidelity. J Prosthet Dent. 1990; 64:18–24.
44. Moon BH, Yang JH, Lee SH, Chung HY. A study on the marginal fit of all-ceramic crown using CCD camera. J Korean Acad Prosthodont. 1998; 36:273–292.
45. Leong D, Chai J, Lautenschlager E, Gilbert J. Marginal fit of machine-milled titanium and cast titanium single crowns. Int J Prosthodont. 1994; 7:440–447.
46. Molin M, Karlsson S. The fit of gold inlays and three ceramic inlay systems. A clinical and in vitro study. Acta Odontol Scand. 1993; 51:201–206.
47. Laurent M, Scheer P, Dejou J, Laborde G. Clinical evaluation of the marginal fit of cast crowns-validation of the silicone replica method. J Oral Rehabil. 2008; 35:116–122.
48. Rahme HY, Tehini GE, Adib SM, Ardo AS, Rifai KT. In vitro evaluation of the “replica technique” in the measurement of the fit of Procera crowns. J Contemp Dent Pract. 2008; 9:25–32.
49. Gassino G, Barone Monfrin S, Scanu M, Spina G, Preti G. Marginal adaptation of fixed prosthodontics: a new in vitro 360-degree external examination procedure. Int J Prosthodont. 2004; 17:218–223.
50. Groten M, Axmann D, Pröbster L, Weber H. Determination of the minimum number of marginal gap measurements required for practical in-vitro testing. J Prosthet Dent. 2000; 83:40–49.
51. Yoon JW, Yang JH, Han JS, Lee JB. A study on the marginal fit of collarless metal ceramic fixed partial dentures. J Korean Acad Prosthodont. 2005; 43:707–716.
52. Vigolo P, Fonzi F. An in vitro evaluation of fit of zirconium-oxide-based ceramic four-unit fixed partial dentures, generated with three different CAD/CAM systems, before and after porcelain firing cycles and after glaze cycles. J Prosthodont. 2008; 17:621–626.
53. Gonzalo E, Suárez MJ, Serrano B, Lozano JF. Comparative analysis of two measurement methods for marginal fit in metal-ceramic and zirconia posterior FPDs. Int J Prosthodont. 2009; 22:374–377.
54. Holmes JR, Bayne SC, Holland GA, Sulik WD. Considerations in measurement of marginal fit. J Prosthet Dent. 1989; 62:405–408.
55. Jørgensen KD, Esbensen AL. The relationship between the film thickness of zinc phosphate cement and the retention of veneer crowns. Acta Odontol Scand. 1968; 26:169–175.
56. Passon C, Lambert RH, Lambert RL, Newman S. The effect of multiple layers of die-spacer on crown retention. Oper Dent. 1992; 17:42–49.
57. Eames WB, Sieweke JC, Wallace SW, Rogers LB. Elastomeric impression materials: effect of bulk on accuracy. J Prosthet Dent. 1979; 41:304–307.
58. Kunii J, Hotta Y, Tamaki Y, Ozawa A, Kobayashi Y, Fujishima A, Miyazaki T, Fujiwara T. Effect of sintering on the marginal and internal fit of CAD/CAM-fabricated zirconia frameworks. Dent Mater J. 2007; 26:820–826.
Full Text Links
  • JAP
Actions
Cited
CITED
export Copy
Close
Share
  • Twitter
  • Facebook
Similar articles
Copyright © 2024 by Korean Association of Medical Journal Editors. All rights reserved.     E-mail: koreamed@kamje.or.kr