An interventional study of Conventional impressions and Digital impressions in Dental Implant Failure, sponsored by University of Valencia. Completed at 1 site in Spain. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-07-13.
Sponsored by University of Valencia · Not applicable, Interventional, and Treatment
Proper implant position has a significant impact in esthetic and functional outcomes of implant-supported restorations. Computer-assisted template-based implant placement (guided surgery) have become increasingly popular due to improved planning and the higher transfer accuracy of the virtual plan to the surgical site compared with freehand insertion or freehand final drilling. Digital impressions replace the need for traditional materials that can be inconvenient and messy for patients. To the best of our knowledge, at the time of planning this study, there were no published RCTs evaluating a fully digital approach for computer-assisted template-based implant placement.
The aim of the present study is to compare early implant failure, template-related complications, and virtual planning accuracy of computer-assisted template-based implant placement using conventional impression and scan model or digital impression.
The null hypothesis is that there will be no difference between these interventions.
University of Valencia is the lead sponsor of 349 studies on the registry; 73 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Exclusion Criteria:
The intervention of this arm will be "conventional impression": polyether impression will be taken with a customized tray.
Procedure: Conventional impressions
The intervention of this arm will be "digital impression": digital impression will be taken using a CS 3600 intraoral scanner .
Procedure: Digital impressions
In the conventional group, a polyether impression (ImpregumTM, 3M ESPE, Seefeld, Germany) will be taken with a customized tray (Diatray Top, Dental Kontor, Stockelsdorf, Germany). The impression will be poured with Gypsum IV Class Scale 5° (T6, Techim, Techim Group s.r.l., Arese, Italy) and then, the models mounted in a fully adjustable articulator (Protar Evo 7, KaVo Dental, Biberach, Germany). Afterwards, a dental wax-up will be made accordingly to the functional and esthetic requirements. Finally, master model and wax-up will be digitalized by using a lab scanner. A surgical template will be derived from the mounted casts (conventional group) and used to place the implants using guided surgery.
Patients will be randomly assigned to undergo intraoral digital impression (digital group) or conventional impression (conventional group). In the digital group, a digital impression will be taken using CS 3600 intraoral scanner (Carestream Dental LLC, Atlanta, GA, USA). The digital data (STL, STereo Lithography interface format) will be imported in a 3D design software to realize a virtual wax-up according to the functional and esthetic requirements. A surgical template will be derived from the virtual plane (digital group) and used to place the implants using guided surgery.
Linear distance between planned and real implant apex position
The change in mm between the apex of the planned and the final (real) position of the implant.
Time frame: Immediate post-surgery
Angle between the planned and real implant axis
Change in angulation between the planned and the final (real) position of the implant.
Time frame: Immediate post-surgery
This study is completed, as verified in Jul 2026. You cannot join it, but the record below documents what was studied.
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University of Valencia