The Journal of Advanced Prosthodontics

The Korean Academy of Prosthodonitics (대한치과보철학회)
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Accuracy of new implant impression technique using dual arch tray and bite impression coping

  • Lee, Shin-Eon (Department of Prosthodontics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea) ;
  • Yang, Sung-Eun (Department of Conservative Dentistry, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea) ;
  • Lee, Cheol-Won (Department of Prosthodontics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea) ;
  • Lee, Won-Sup (Department of Prosthodontics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea) ;
  • Lee, Su Young (Department of Prosthodontics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea)
  • Received : 2017.09.12
  • Accepted : 2018.03.26
  • Published : 2018.08.31
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Abstract

PURPOSE. The purpose of this in vitro study was to evaluate the accuracy of a new implant impression technique using bite impression coping and a dual arch tray. MATERIALS AND METHODS. Two implant fixtures were placed on maxillary left second premolar and first molar area in dentoform model. The model with two fixtures was used as the reference. The impression was divided into 2 groups, n=10 each. In group 1, heavy/light body silicone impression was made with pick up impression copings and open tray. In group 2, putty/light body silicone impression was made with bite impression copings and dual arch tray. The reference model and the master casts with implant scan bodies were scanned by a laboratory scanner. Surface tessellation language (STL) datasets from test groups was superimposed with STL dataset of reference model using inspection software. The three-dimensional deviation between the reference model and impression models was calculated and illustrated as a color-map. Data was analyzed by independent samples T-test of variance at ${\alpha}=.05$. RESULTS. The mean 3D implant deviations of pick up impression group (group 1) and dual arch impression group (group 2) were 0.029 mm and 0.034 mm, respectively. The difference in 3D deviations between groups 1 and 2 was not statistically significant (P=.075). CONCLUSION. Within limitations of this study, the accuracy of implant impression using a bite impression coping and dual arch tray is comparable to that of conventional pick-up impression.

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