Effect of splinting on the accuracy of impressions of multiple straight implants in full arch rehabilitation: An in vitro-study | ||||
| Egyptian Dental Journal | ||||
| Article 21, Volume 64, Issue 4 - October (Fixed Prosthodontics, Dental Materials, Conservative Dentistry & Endodontics), October 2018, Page 3733-3739 PDF (786.71 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/edj.2018.79243 | ||||
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| Authors | ||||
| M. Shady Nabhan; Yasmine G. Thabet | ||||
| Lecturer of Removable Prosthodontics, Faculty of Dentistry Ain Shams University. | ||||
| Abstract | ||||
| Objectives: This study was conducted to assess the effect of different splinting techniques (with and without sectioning of the splinting material) on the accuracy of impressions of multiple straight implants in full arch rehabilitation cases. Materials and methods: A maxillary resin printed study model with five straight fixtures was used as the master model. Open tray impression technique was done for all groups. Three groups were defined according to splinting of the impression copings: Group A: Impression copings were splinted to each other using autopolymerizing acrylic resin. Group B: Impression copings were splinted to each other using autopolymerizing acrylic resin which was sectioned with a 0.3 mm thickness disc and reconnected with a second mix of resin. Group C: Impression copings were not splinted to each other. For each group, five different impressions were prepared. The impressions were poured to create the casts that were digitally scanned. The accuracy of the positions and angulations of the implants was evaluated using a computer-graphics coordinate measurement system. Results: Group A showed higher angular deviation compared to group B and group C. One way ANOVA showed statistically significant difference between the studied groups, P value was <0.001. However, Tukey post hock test showed statistically significant difference between group A and the other groups and no statistically significant difference between group B and group C. On the other hand, regarding linear deviation one way ANOVA showed no statistically significant difference between the studied groups. Conclusion: Both split acrylic‑splinted and non-splinted implant impression techniques yield more accurate master casts regarding angular deviation compared to splinted impression technique without splitting. | ||||
| Keywords | ||||
| Splinting; Implant impressions; accuracy of impressions | ||||
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