Dimensional Accuracy of Impression Using Conventional Putty- wash Compared to Modified Putty-wash Technique

Abdulrahman J. Alhaddad; Samar H. Abuzinadah; Lujain A. Alzahrani; Zainab A. Almutairi; Othman S. Alsulimani; Osamah A. Alsulimani; Reema S. Aldaqal; Nojoud A. Albeladi; Alaa A. Kensara; Ahmed Ali Alwahbi; Doha Alhomoud; Mosa Altassan; Osama A. Qutub; Thamer Y. Marghalani

doi:10.47310/jpms2025140521

Background: Impression material accuracy is crucial for the fabrication of indirect restorations because distortion during the impression process can affect the final dental prosthesis. However, the impression technique is essential for ensuring a proper fit for the prosthesis. Among various impression materials, this impression creates a dimensionally stable "negative" mold, which serves as the basis for developing a cast for the dental structure. Purpose: To evaluate and compare the dimensional accuracy of conventional and modified putty-wash techniques on measurements of the finish line on a scanned model using superimposition. The study aimed to evaluate if the impression made using the modified putty-wash technique can produce a more accurate cast than that made using the conventional putty-wash technique. Methods: This study used a master model fabricated from the original typodont containing two crown abutment preparations (molar and premolar). 95 impressions were made using upper plastic trays and divided into three groups. Group 1 consisted of 25 impressions using the two-step conventional putty-wash technique. Group 2 also had 25 impressions and was made using the modified putty-wash technique with baseplate pink wax, utility wax and light body. Group 3 included 45 impressions using the modified putty-wash technique. Results: The dimensional accuracy of the resulting casts was affected owing to a statistically significant difference between the modified and conventional putty-wash techniques. Conclusion: This study aimed to develop a more precise technique utilizing utility wax and hard pink baseplate wax as an alternative to the conventional putty-wash method. This approach enhances ease of handling for clinicians while offering cost-effectiveness and repeatability, as utility wax can be softened and reused. In contrast, putty material cannot be reused due to its susceptibility to deformation.

Rosenstiel ,Stephen F ,Australia . .Loading book or book chapter title format. 6th Edn, 20 : 944.

Sakaguchi and John M.,Powers and John M.,Australia and John M. . .Loading book or book chapter title format. 14th Edn, 340 : 10.

Gupta Melina,Brizuela Melina .2023 .. Dental impression materials, : .

Lawson ,Nathaniel C .2020 .Clinical acceptance of single-unit crowns and its association with impression and tissue displacement techniques: Findings from the National Dental Practice-Based Research Network. The Journal of Prosthetic Dentistry, 123(5) : 701-709.

Jamshidy ,November .2016 .Accuracy of the one‐stage and twostage impression techniques: A comparative analysis. International Journal of Dentistry, 1 : .

Din Shahab,Ud Shahab . .Improved water absorption behaviour of experimental hydrophilic vinyl polysiloxane (VPS) impression materials incorporating a crosslinking agent and a novel surfactant. ” Dental Materials, 37(6) : 1054-1065.

Pandey . .properties_of_a_new_vinyl_polyether.5. ” Contemporary Clinical Dentistry, 10(2) : 203-207.

Mohamed Kasim,K. Kasim .2021 .GC-MS and surface characteristics of polyvinyl siloxane-an in vitro analysis. ” Journal of Chromatographic Science, 50(2) : 111-116.

Zarrintaj .2019 .Impression materials for dental prosthesis. ” Advanced Dental Biomaterials, : 197-215.

Andreas .2020 .Accuracy of a new fast-setting polyether impression material. The International Journal of Prosthodontics, 33 : 410-417.

Singer . .Tear strength and elastic recovery of new generation hybrid elastomeric impression material: A comparative study. ” BMC Research Notes, 15(1) : .

Ho ,April 2018 . .Viscosity effects of polyvinyl siloxane impression materials on the accuracy of the stone die produced. ” Journal of Clinical and Translational Research, 4(1) : 70-74.

Singer ,April 2023 . .Evaluation of the properties of a new super quick-setting (2 min) polyether impression material. ” Clinical Oral Investigations, 27(7) : 3673-3682.