NCT07235072

Passive Fit and Time Efficiency in All On-X Implants Protocols Using Photogrammetry, Splinted Scan Bodies, and Conventional Impression Technique

Comparative Analysis of Passive Fit and Time Efficiency in Allon-X Implants Protocols Using Photogrammetry, Splinted Scan Bodies, and Conventional Impression Technique

• Status: Not Yet Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 14 (estimated)
• Sponsor: October 6 University · Academic / Other
• Sex: All
• Age: 45 Years – 65 Years
• Healthy volunteers: Not accepted

Summary

compare the passive fit of three impression techniques: photogrammetry, intraoral digital scanning with splinted scan bodies, and the conventional open-tray impression technique, within the context of the All-on-X treatment concept. This comparison is expected to provide valuable clinical evidence to support clinicians in making informed decisions when considering the adoption of digital alternatives to conventional methods.

Detailed description

For edentulous patients undergoing full-arch rehabilitation, the All-on-X treatment approach has proven to be a very successful option, providing enhanced function, aesthetics, and patient satisfaction. Achieving passive fit, which reduces mechanical stress on implants and prosthetic components and reduces the possibility of problems such screw loosening, fracture, or marginal bone loss, is crucial to the long-term effectiveness of implant-supported prostheses. Passive fit has traditionally been evaluated after prostheses are fabricated using traditional open-tray impression techniques, which are regarded as the gold standard because of their great precision and dependability. These approaches, however, are challenging, technique-specific, and susceptible to human mistake or material deformation. Other methods include digital intraoral scanning with splinted scan bodies and photogrammetry have become more appreciated due to the quick development of digital dentistry. Potential advantages of these digital workflows include quicker digital data transfer to the lab, less chairside time, and improved patient comfort. In the context of the All-on-X procedure, there is still no clinical data comparing the accuracy especially passive fit and time efficiency of these more recent methods with traditional impressions, despite these benefits. Thus, the purpose of this study is to compare the time efficiency and passive fit of three impression techniques: traditional open-tray impressions, digital intraoral scanning with splinted scan bodies, and photogrammetry. The findings will provide clinicians with evidence-based insights into whether digital alternatives can match or surpass traditional techniques in terms of accuracy and workflow efficiency, ultimately supporting the transition toward more modern, streamlined protocols in implant prosthodontics.

Conditions

• Passive Fit of Full-arch Implant Prostheses

Interventions

Type	Name	Description
DEVICE	Photogrammetry-Based Full-Arch Impression	Use of a photogrammetry system to capture the positions of All-on-X implants digitally without physical impression materials. The technique aims to achieve precise passive fit and reduce chairside working time. Measurements of passive fit discrepancy and total procedure time will be recorded
DEVICE	Digital Impression Using Splinted Scan Bodies	Digital full-arch impression using splinted scan bodies connected with resin to enhance stability. An intraoral scanner captures the splinted assembly for framework fabrication. Passive fit and working time will be evaluated
PROCEDURE	Conventional Open-Tray Implant Impression	Traditional full-arch open-tray impression using polyether or VPS material with splinted impression copings. This serves as the standard comparator for evaluating passive fit and procedure duration

Timeline

• Start date: 2026-03-01
• Primary completion: 2026-09-01
• Completion: 2026-10-01
• First posted: 2025-11-19
• Last updated: 2025-11-24