Zappi A, Papazoglou E, Anagnostou M. Is a Wiggling-Motion Modified Two-Step Impression Technique as Accurate as Conventional Techniques in Restorative Dentistry?
Dent J (Basel) 2023;
11:dj11050139. [PMID:
37232790 DOI:
10.3390/dj11050139]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 05/02/2023] [Accepted: 05/15/2023] [Indexed: 05/27/2023] Open
Abstract
BACKGROUND
The purpose of this study was to evaluate dental impression accuracy of one-step and two-step techniques compared to a modified two-step technique.
METHODS
Four impression techniques were compared: (1) a one-step double mix (DM) technique, (2) a cut-out (CO) technique, in which space relief was created using a blade and a laboratory bur, (3) a membrane (ME) technique, in which space relief was created by placing a PVC membrane on top of the putty material during the primary impression, and (4) a wiggling motion (WI) technique, in which PVC membrane was placed and additional wiggling movements were performed during the first 20 s when the primary impression was seated upon the master model (MM). Impressions were poured with type IV stone. Casts were scanned with a laboratory scanner and measurements were made for each cast using three-dimensional analysis software.
RESULTS
All groups presented differences compared to MM group, in at least one intra-abutment distance. Groups DM and ME presented the most significant differences, in three and two distances, respectively, whereas CO and WI presented one significant different distance compared to MM. There were no differences between MM and the four techniques for inter-abutment distances.
CONCLUSIONS
WI yielded similar results with CO technique. Both performed better than the other groups.
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