Özcan Işıla, Köroğlu Aslıhanb, Kale Edizc, Özçelik Tuncer Buraka, Yilmaz Burakd
aBaşkent University Faculty of Dentistry, Department of Prosthodontics, Ankara, Turkey
bFatma Kemal Timuçin Oral and Dental Health Hospital, Adana, Turkey
cPrivate Dental Practice, Adana, Turkey
dUniversity of Bern, School of Dental Medicine, Department of Reconstructive Dentistry and Gerodontology, Bern, Switzerland + University of Bern, School of Dental Medicine, Department of Restorative, Preventive and Paediatric Dentistry, Bern, Switzerland + The Ohio State University, Division of Restorative and Prosthetic Dentistry, Ohio, USA
Summary
Background/Aim: The purpose of this study was to evaluate the quality of impressions made with vinyl polysiloxane (VPS) material in clinical conditions by using the one-step impression technique, and the quality of casts generated from these impressions. The effect of operator, number and location of abutments, and presence of bleeding were also investigated. Material and Methods: A total of 150 fixed dental prosthesis (FDP) impressions were taken and considered acceptable by 3 experienced prosthodontists in a clinic in an institutional setting. The impressions were evaluated and rated by another experienced prosthodontist and respective casts were evaluated and rated by an experienced dental technician using a digital microscope with ×200 magnification. The defects observed were noted as bubbles, voids, tears, or other defects. A scale was structured for the impressions and casts with ratings of Alpha (excellent; no defects), Bravo (acceptable; small defects), Charlie (inadequate; defects that require remaking of impression), and Delta (unacceptable; substantial defects at preparation finish lines). The data were analyzed with the Chi-square test for inter-operator, number of abutments, and location of prepared tooth variables (a=0.05). Results: The scale ratings were 85 Alpha (57%), 52 Bravo (34%), 6 Charlie (4%), and 7 Delta (5%) for the impressions, and 81 Alpha (54%), 58 Bravo (39%), 4 Charlie (3%), and 7 Delta (5%) for the respective casts. Sixty-nine percent of the impressions and respective casts were rated with the same score. The scale rating results were not influenced by inter-operator variability or number of abutments. Location of the prepared tooth was significant for anterior/posterior (p=0.04), but was not significant for maxilla/ mandible (p>0.05). Bleeding at the preparation site had a significant effect on the acceptability of the impression (p=0.003). Conclusions: The acceptability of VPS impressions using onestep technique was independent of the operator, number of abutments, or whether the prepared tooth was in maxilla or mandible. Impressions of teeth in the anterior region were more acceptable than those located in the posterior. Bleeding negatively affected the acceptability of the impressions. Clinicians may use VPS impressions for the fabrication of FDPs using onestep dual-phase technique. However, clinicians should carefully evaluate their impressions when bleeding is present when using this technique.
Keywords: Dental Impression Technique; Dental Impression Materials; Vinyl Polysiloxane; Impression Quality; Fixed Dental Prostheses
Reference
Beier, U.S., Grunert, S.I., Kulmer, S., Dumfahrt, H. (2007) Quality of Impressions Using Hydrophilic Polyvinyl Siloxane in a Clinical Study of 249 Patients. Int J Prosthodont, 20: 270-274
Blatz, M.B., Sadan, A., Burgess, J.O., Mercante, D., Hoist, S. (2005) Selected Characteristics of a New Polyvinyl Siloxane Impression Material: A Randomized Clinical Trial. Quintessence Int, 36: 97-104
Boulton, J.L., Gage, J.P., Vincent, P.F., Basford, K.E. (1996) A Laboratory Study of Dimensional Changes for Three Elastomeric Impression Materials Using Custom and Stock Trays. Aust Dent J, 41(6): 398-404
Caputi, S., Varvara, G. (2008) Dimensional Accuracy of Resultant Casts Made by a Monophase, One-Step and Two-Step, and a Novel Two-Step Putty/Light-Body Impression Technique: An In Vitro Study. J Prosthet Dent, 99(4): 274-281
Carrotte, P.V., Winstanley, R.B., Green, J.R. (1993) A Study of the Quality of Impressions for Anterior Crowns Received at a Commercial Laboratory. Br Dent J, 174: 235-240
Carrotte, P.V., Johnson, A., Winstanley, R.B. (1998) The Influence of the Impression Tray on the Accuracy of Impressions for Crown and Bridge Work: An Investigation and Review. Br Dent J, 185: 580-585
Clancy, J.M.S., Scandrett, F.R., Ettinger, R.L. (1983) Long-Term Dimensional Stability of Three Current Elastomers. J Oral Rehabil, 10(4): 325-333
Craig, R.G. (1982) Composition Characteristics and Clinical Tissue Reactions of Impression Materials. u: Smith D.C., Williams D.F. [ur.] Biocompatibility of Dental Materials, Chicago: CRC Press, 227-298
Dogan, S., Schwedhelm, E.R., Heindl, H., Mancl, L., Raigrodski, A.J. (2015) Clinical Efficacy of Polyvinyl Siloxane Impression Materials Using the One-Step Two-Viscosity Impression Technique. J Prosthet Dent, 114: 217-222
Dugal, R., Railkar, B., Musani, S. (2013) Dimensional Accuracy When Making Impressions Is Crucial to the Quality of Fixed Prosthodontic Treatment, and the Impression Technique Is a Critical Factor Affecting This Accuracy. J Int Oral Health, 5: 85-94
Franco, E.B., da Cunha, L.F., Herrera, F.S., Benetti, A.R. (2011) Accuracy of Single-Step versus 2-Step Double-Mix Impression Technique. ISRN Dent, 2011:341546
Gordon, G.E., Johnson, G.H., Drennon, D.G. (1990) The Effect of Tray Selection on the Accuracy of Elastomeric Impression Materials. J Prosthet Dent, 63: 12-15
Hamalian, T.A., Nasr, E., Chidiac, J.J. (2011) Impression Materials in Fixed Prosthodontics: Influence of Choice on Clinical Procedure. J Prosthodont, 20(2): 153-160
Hung, S.H., Purk, J.H., Tira, D.E., Eick, J. (1992) Accuracy of One-Step Versus Two-Step Putty Wash Addition Silicone Impression Technique. J Prosthet Dent, 67(5): 583-589
Johnson, G.H., Craig, R.G. (1986) Accuracy of Addition Silicones as a Function of Technique. J Prosthet Dent, 55(2): 197-203
Johnson, G.H., Mancl, L.A., Schwedhelm, E., Verhoef, D.R., Lepe, X. (2010) Clinical Trial Investigating Success Rates for Polyether and Vinyl Polysiloxane Impressions Made with Full-Arch and Dual-Arch Plastic Trays. J Prosthet Dent, 103(1): 13-22
Lacy, A.M., Fukui, H., Bellman, T., Jendresen, M.D. (1981) Time-Dependent Accuracy of Elastomer Impression Materials: Part II: Polyether, Polysulfides, and Polyvinylsiloxane. J Prosthet Dent, 45(3): 329-333
Laufer, B.Z., Baharav, H., Ganor, Y., Cardash, H.S. (1996) The Effect of Marginal Thickness on the Distortion of Different Impression Materials. J Prosthet Dent, 76(5): 466-471
Lee, I.K., Delong, R., Pintado, M.R., Malik, R. (1995) Evaluation of Factors Affecting the Accuracy of Impressions Using Quantitative Surface Analysis. Oper Dent, 20: 246-252
Marcinak, C.F., Draughn, R.A. (1982) Linear Dimensional Changes in Addition Curing Silicone Impression Materials. J Prosthet Dent, 47(4): 411-413
Nissan, J., Gross, M., Shifman, A., Assif, D. (2002) Effect of Wash Bulk on the Accuracy of Polyvinyl Siloxane Putty-Wash Impressions. J Oral Rehabil, 29(4): 357-361
Nissan, J., Laufer, B.Z., Brosh, T., Assif, D. (2000) Accuracy of Three Polyvinyl Siloxane Putty-Wash Impression Techniques. J Prosthet Dent, 83(2): 161-165
Pande, N.A., Parkhedkar, R.D. (2013) An Evaluation of Dimensional Accuracy of One-Step and Two-Step Impression Technique Using Addition Silicone Impression Material: An In Vitro Study. J Indian Prosthodont Soc, 13: 254-259
Pant, R., Juszczyk, A.S., Clark, R.K.F., Radford, D.R. (2008) Long-Term Dimensional Stability and Reproduction of Surface Detail of Four Polyvinyl Siloxane Duplicating Materials. J Dent, 36(6): 456-461
Raigrodski, A.J., Dogan, S., Mancl, L., Heindl, H.A. (2009) A Clinical Comparison of Two Vinyl Polysiloxane Impression Materials Using the One-Step Technique. J Prosthet Dent, 102: 179-186
Rubel, B.S. (2007) Impression Materials: A Comparative Review of Impression Materials Most Commonly Used in Restorative Dentistry. Dent Clin North Am, 51(3): 629-642
Samet, N., Shohat, M., Livny, A., Weiss, E.I. (2005) A Clinical Evaluation of Fixed Partial Denture Impressions. J Prosthet Dent, 94: 112-117
Stober, T., Johnson, G.H., Schmitter, M. (2010) Accuracy of the Newly Formulated Vinyl Siloxanether Elastomeric Impression Material. J Prosthet Dent, 103: 228-239
Takahashi, H., Finger, W.J. (1994) Effects of the Setting Stage on the Accuracy of Double-Mix Impressions Made with Addition-Curing Silicone. J Prosthet Dent, 72(1): 78-84
Tjan, A.H., Heisler, W.H. (1992) Dimensional Accuracy and Bond Strength of Addition Silicones. Am J Dent, 5: 223-225
Tjan, A.H.L., Li, T., Irving, L.G., Baum, L. (1991) Marginal Accuracy of Complete Crowns Made from Alternative Casting Alloys. J Prosthet Dent, 66(2): 157-164
Wadhwani, C.P., Johnson, G.H., Lepe, X., Raigrodski, A.J. (2005) Accuracy of Newly Formulated Fast-Setting Elastomeric Impression Materials. J Prosthet Dent, 93: 530-539
Winstanley, R.B., Carrotte, P.V., Johnson, A. (1997) The Quality of Impressions for Crowns and Bridges Received at Commercial Dental Laboratories. Br Dent J, 183: 209-213
Balkan Journal of Dental Medicine, 2022, vol. 26, br. 2, str. 82-87