NCT07466355

Evaluation of Implant Abutment-Level Digitalization Techniques

Evaluation of Implant Abutment Level Digitalization Techniques: A Clinical Methodological Study

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 12 (actual)
• Sponsor: Hacettepe University · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Accepted

Summary

This methodological clinical study aims to evaluate digital workflows used for the intraoral digitalization of cement-retained implant abutments in situations where implant impression components are unavailable and abutment replacement is not feasible. Three digital impression workflows were compared through quantitative analysis of three-dimensional implant positions derived from digital datasets obtained using scan bodies and abutment-level scans. Implant positions were defined by virtual implant axes and analyzed using reverse engineering software. The study evaluates whether combined intraoral-extraoral abutment scanning provides comparable accuracy to direct intraoral abutment scanning.

Detailed description

Digital workflows have increasingly been integrated into implant prosthodontics through the use of intraoral scanners and CAD-CAM technologies. While scan bodies are considered the gold standard for transferring implant position digitally, clinical situations may arise in which implant impression components are unavailable or replacement of the existing abutment is not feasible. In such scenarios, direct intraoral digitalization of the existing implant abutment has been proposed as an alternative method for capturing implant position during prosthetic maintenance or restoration replacement. However, the accuracy and clinical reliability of abutment-level digitalization remain uncertain. The aim of this methodological clinical study is to compare different digital workflows for the intraoral digitalization of cement-retained implant abutments in clinical conditions where conventional implant impression components cannot be used. Three digital impression workflows were evaluated by comparing three-dimensional implant positions obtained from digital datasets. Implant positions were defined by virtual implant axes derived from scan body data and abutment-level scans, and analyzed using reverse engineering software.

Conditions

• Prosthesis User, Digitalism

Interventions

Type	Name	Description
OTHER	Digital workflows using an intraoral scanner (TRIOS, 3Shape)	In this clinical study, three digital workflows were applied to each participant for the digitalization of cement-retained implant abutments. All digital impressions were obtained using an intraoral scanner (TRIOS, 3Shape). The workflows included: (1) intraoral scanning using the original scan body (Straumann), (2) direct intraoral scanning of the cement-retained abutment, and (3) a combined workflow involving intraoral and extraoral scanning of the abutment followed by best-fit alignment. Three-dimensional implant positions were defined by virtual implant axes derived from the digital datasets. Angular deviation analysis was performed using reverse engineering software to compare implant position outcomes among the digital workflows.

Timeline

• Start date: 2025-03-21
• Primary completion: 2025-09-29
• Completion: 2025-10-14
• First posted: 2026-03-12
• Last updated: 2026-03-12

Locations

1 site across 1 country: Turkey (Türkiye)