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

November 19, 2025 updated by: Mohammed Fathy Abdelhamid, October 6 University

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

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.

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

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.

Study Type

Interventional

Enrollment (Estimated)

14

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

  • Name: Mohammed Fathy Ghobashy, Bachelor of Dental Surgery
  • Phone Number: 00201099632823
  • Email: mo97.fathy@gmail.com

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

Adults aged 45-65 years.

Fully edentulous or partially edentulous maxilla requiring full-arch rehabilitation.

Sufficient maxillary bone volume to support at least four implants according to the All-on-X protocol.

Systemically healthy patients with no contraindications to dental implant surgery (ASA I-II classification).

Demonstrated ability to maintain adequate oral hygiene.

Willingness to participate in the study and comply with follow-up visits and required maintenance protocols.

Patients seeking a fixed, implant-supported prosthesis for the maxilla due to missing teeth and inability to use removable prostheses effectively.

Acceptable radiographic findings with no signs of pathology, infection, or significant anatomical limitations.

Exclusion Criteria:

Uncontrolled systemic diseases (e.g., uncontrolled diabetes, osteoporosis, immunosuppressive disorders)

History of radiation therapy to the head and neck region

Active periodontal disease or untreated caries

Maxillary cysts, tumors, or pathologies

Poor oral hygiene or inability to maintain postoperative care

Insufficient bone volume for All-on-X without extensive grafting

Maxillary sinus pathology or oroantral fistula

Psychiatric illness or cognitive impairment affecting compliance

Bruxism or parafunctional habits

Pregnant or lactating women

History of implant failure or titanium allergy

Use of bisphosphonates or antiresorptive medications

Heavy smoking (>10 cigarettes/day)

Inability or unwillingness to attend follow-up visits

Diagnosed or symptomatic temporomandibular joint disorders (pain, clicking, locking, limited opening)

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Diagnostic
  • Allocation: Non-Randomized
  • Interventional Model: Crossover Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Photogrammetry-Based Full-Arch Impression
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
Experimental: Digital Impression Using Splinted Scan Bodies
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
Active Comparator: Conventional Open-Tray Implant Impression
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

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Passive fit measured using 3D inspection software (Geomagic Control X)
Time Frame: Immediately after framework verification
Immediately after framework verification

Secondary Outcome Measures

Outcome Measure
Time Frame
Time efficiency, assessed using stop watch and measured by seconds.
Time Frame: During impression procedure
During impression procedure

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

October 6 University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

March 1, 2026

Primary Completion (Estimated)

September 1, 2026

Study Completion (Estimated)

October 1, 2026

Study Registration Dates

First Submitted

November 14, 2025

First Submitted That Met QC Criteria

November 14, 2025

First Posted (Estimated)

November 19, 2025

Study Record Updates

Last Update Posted (Actual)

November 24, 2025

Last Update Submitted That Met QC Criteria

November 19, 2025

Last Verified

November 1, 2025

More Information

Terms related to this study

Other Study ID Numbers

  • RECO6U/22-2025

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Sharing Supporting Information Type

  • STUDY_PROTOCOL
  • SAP
  • ICF
  • ANALYTIC_CODE
  • CSR

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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