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Ambedkar Elumalai,Saravanakumar Mariappan,ChitraShankar Krishnan,Hariharan Ramasubramanian,Jayakrishnakumar Sampathkumar,Hariharan Ramakrishnan,Azhagarasan Nagarasampatti Sivaprakasam,Vallabh Mahadeva 대한치과이식임플란트학회 2021 The Korean Academy of Implant Dentistry Vol.40 No.3
The purpose of this study was to comparatively evaluate the rigidity and accuracy of three different elastomeric impression materials with an open tray implant level impression technique. In Part, I of the study a total of thirty open tray implant level impressions were made with vinylpolysiloxane (n=10), polyether (n=10), and vinylsiloxanether (n=10) impression materials. Implant replicas were connected to the impression coping using a digital screw torque checker. The peak torque values were recorded indicating the maximum rigidity of each group. The mean values were obtained and statistically analyzed using one-way ANOVA and Post-hoc HSD test. In Part II of the study, a total of thirty impressions were made with vinylpolysiloxane (n=10), polyether (n=10), and vinylsiloxanether (n=10) impression materials similarly. Implant replicas were connected to the impression coping with 5 Nㆍcm torque for vinylpolysiloxane and polyether groups. A gentle hand tightening was given to the vinylsiloxanether group. The master casts were poured. Subsequently, linear angle and vertical distance were measured using a coordinate measuring machine. The mean values were obtained and statistically analyzed using one-way ANOVA, posthoc Tukey HSD, and independent t test. Vinylpolysiloxane showed the maximum rotational resistance followed by polyether and the least by vinylsiloxanether and were statistically significant (P<0.05). Polyether showed the least rotational discrepancy than the vinyl polysiloxane and vinylsiloxanether and was statistically significant (P<0.05). Vinylpolysiloxane showed the least vertical discrepancy than the vinylsiloxanether and polyether without any statistical significance (P>0.05). Among the elastomeric impression materials used in this study, vinylpolysiloxane showed the maximum rotational resistance, polyether showed the least rotational discrepancy and the vertical discrepancy of these three materials was not significant.
Sekar Abinaya,Mariappan Saravanakumar,Krishnan Chitra Shankar,Sampathkumar Jayakrishnakumar,Ramakrishnan Hariharan,Mahadevan Vallabh,Sivaprakasam Azhagarasan Nagarasampatti 대한치과이식(임프란트)학회 2022 The Korean Academy of Implant Dentistry Vol.41 No.4
Purpose: This study compared the accuracy of different elastomeric impression materials with open tray implant level impression technique in a single-tooth replacement. Materials and Methods: A reference model representing a single implant with an adjacent simulated natural tooth was fabricated. Open tray implant level impressions were made with vinylpolysiloxane (light body ExpressXT, PentaputtyPentamix2, 3MESPE, Seinfield, Germany) (Group I, n=10) and polyether (medium body Impregnum Penta, Pentamix 2, 3MESPE, Seinfield, Germany), (Group II, n=10) and implant crowns were fabricated on each master cast from their respective impressions by CNC milling and connected to the reference model with 35 Ncm torque. The accuracy of the fit was evaluated by measuring the interface gap between the implant crown and the implant replica at the mesial and distal points and by measuring the proximal gap between the implant crown and the simulated natural tooth at the buccal and the palatal points by scanning electron microscopy for each test sample. The mean values were obtained and statistically analyzed using a Mann-Whitney test. Results: The interface gap observed at the mesial point was significantly higher than the distal point. The proximal gap observed at the palatal point was significantly higher than the buccal point for both Group I and Group II. A comparison of the groups showed that the interface gap at the mesial point and the proximal gap at the buccal and palatal points obtained from polyether impression material were lower than those observed with vinylpolysiloxane group, but the difference was not significant. However, the interface gap observed at the distal point was higher with the polyether group than with the vinylpolysiloxane group, but the difference was not significant. Conclusions: Polyether and vinylpolysiloxane can be used to produce open tray implant impressions for a single missing tooth.