Effects of Impression Material and Implant Angulation on the Impression Accuracy of External Connection Implants : An In Vitro Study = Effets du Matériau d'Empreinte et de l'Angulation de l'Implant sur la Précision de l’Empreinte des Implants à Connexion Externe : Une Étude in Vitro

2020 ◽  
Vol 11 (1) ◽  
pp. 11-18
Author(s):  
Irani , Dany ◽  
El Ahmadié , Mayssaê
Keyword(s):  
In Vitro Study ◽  
Vitro Study ◽  
Impression Material ◽  
Impression Accuracy ◽  
External Connection

An in vitro study to evaluate the accuracy of dies obtained from dual-arch impression trays using addition silicone impression material and tray combinations

2015 ◽  
Vol 5 (3) ◽  
pp. 119
Author(s):  
ShobhaJ Rodrigues ◽  
S George ◽  
VidyaK Shenoy ◽  
Thilak Shetty ◽  
Sharon Saldanha
Keyword(s):  
In Vitro Study ◽  
Vitro Study ◽  
Impression Material

An in vitro study on the dimensional stability of a vinyl polyether silicone impression material over a prolonged storage period

2013 ◽  
Vol 109 (3) ◽  
pp. 172-178 ◽  
Author(s):  
Usama Nassar ◽  
Andrea Oko ◽  
Samer Adeeb ◽  
Marwan El-Rich ◽  
Carlos Flores-Mir
Keyword(s):  
Dimensional Stability ◽  
Storage Period ◽  
In Vitro Study ◽  
Vitro Study ◽  
Prolonged Storage ◽  
Impression Material

Evaluation of Accuracy of Casts of Multiple Internal Connection Implant Prosthesis Obtained From Different Impression Materials and Techniques: An In Vitro Study

2014 ◽  
Vol 40 (2) ◽  
pp. 137-145 ◽  
Author(s):  
Malesh Pujari ◽  
Pooja Garg ◽  
D. R. Prithviraj
Keyword(s):  
Reference Model ◽  
In Vitro Study ◽  
Acrylic Resin ◽  
Vitro Study ◽  
Impression Material ◽  
Internal Connection ◽  
Impression Materials ◽  
Significant Difference ◽  
Multiple Comparison Procedures

Movement of impression copings inside the impression material using a direct (open tray) impression technique during clinical and laboratory phases may cause inaccuracy in transferring the 3-dimensional spatial orientation of implants intraorally to the cast. Consequently, the prosthesis may require corrective procedures. This in vitro study evaluated the accuracy of 3 different impression techniques using polyether and vinyl polysiloxane (VPS) impression material to obtain a precise cast for multiple internal connection implants. A reference acrylic resin model with 4 internal connection implants was fabricated. Impressions of the reference model were made using 3 different techniques and 2 different impression materials. The study consisted of 24 specimens divided into 6 groups of 4 each. Impressions were poured with ADA type IV stone (Kalrock, Kalabhai Karson Pvt Ltd, Mumbai, India). All casts were evaluated for the positional accuracy (mm) of the implant replica heads using a profile projector. These measurements were compared to the measurements calculated on the reference resin model, which served as a control. Data were analyzed with 2-way analysis of variance (ANOVA) followed by Bonferroni multiple comparison procedures to evaluate group means. The results revealed significant difference for anterior implant distance between the 2 impression materials (P < .01) and also among the 3 different techniques (P < .05). The lowest mean variation was found with the polyether impression material and the splinted technique. For posterior implants, the results suggested no significant difference between the 2 impression materials (P ≥ .05). Although results were not statistically significant, the polyether impression material showed the lowest mean variation as compared to the VPS impression material. However, there was a significant difference among the 3 different techniques (P < .05). Among the 3 different techniques, the lowest mean variation between 2 posterior implants was found in the splinted technique. Casts obtained from impression techniques using square impression copings splinted together with autopolymerizing acrylic resin prior to the impression procedure were more accurate than casts obtained from impressions with nonmodified implant impression copings and with airborne particle–abraded, adhesive-coated copings. Casts obtained from polyether impression material were more accurate than casts obtained from vinyl polysiloxane impression material.

scholarly journals Disposable plastic trays and their effect on polyether and vinyl polysiloxane impression accuracy—an in vitro study

2020 ◽  
Author(s):  
Stefan Rues ◽  
Thomas Stober ◽  
Thomas Bargum ◽  
Peter Rammelsberg ◽  
Andreas Zenthöfer
Keyword(s):  
In Vitro Study ◽  
Vitro Study ◽  
Impression Accuracy ◽  
Disposable Plastic ◽  
Plastic Trays
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