Effect of Scanning Techniques on Accuracy of Mandibular Fixed Detachable Prostheses
Influence of Three Different Scanning Techniques on Scanning Accuracy for Mandibular Fixed Detachable Prosthesis (A Cross Over Study).
1 other identifier
interventional
7
1 country
1
Brief Summary
This crossover clinical study aims to evaluate the influence of three different intraoral scanning techniques on the scanning accuracy and passive fit of mandibular implant-supported fixed detachable prostheses in completely edentulous patients. Each participant will undergo digital implant scanning using three methods: splinted scan bodies, horizontal non-calibrated scan bodies (IO Connect), and auxiliary geometric devices.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at below P25 for not_applicable
Started Aug 2026
1 active site
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
July 28, 2026
CompletedFirst Posted
Study publicly available on registry
July 31, 2026
CompletedStudy Start
First participant enrolled
August 8, 2026
ExpectedPrimary Completion
Last participant's last visit for primary outcome
April 1, 2027
Study Completion
Last participant's last visit for all outcomes
July 1, 2027
July 31, 2026
July 1, 2026
8 months
July 28, 2026
July 28, 2026
Conditions
Keywords
Outcome Measures
Primary Outcomes (2)
Implant linear and angular deviation
The linear and angular deviations of implants will be compared and analyzed across different scanning techniques against each other
Immediately after completion of digital scanning day 0
Three-Dimensional part comparison
Three-dimensional surface deviation will be evaluated by uploading all STL files to dedicated comparison software. Digital superimposition will be performed to calculate the median surface deviation and root mean square (RMS) values between the datasets, providing a quantitative assessment of surface discrepancies among the three scanning techniques.
Immediately after completion of digital scanning day 0
Secondary Outcomes (1)
fit of verification jig
Within 1 hour of fabrication and intraoral placement of the verification jig
Study Arms (3)
Splinted Scan Bodies with composite
EXPERIMENTALParticipants will undergo full-arch digital implant scanning using implant scan bodies splinted with composite resin. The splinting procedure is intended to improve the stability of scan bodies and reduce positional discrepancies during digital impression acquisition.
horizontal non-calibrated scan bodies
EXPERIMENTALParticipants will undergo full-arch digital implant scanning using horizontal non-calibrated scan bodies (IO Connect). This technique utilizes a horizontal scan body design to facilitate implant position recognition, digital alignment, and complete-arch digital impression acquisition.
Auxiliary Geometric Device Scanning
EXPERIMENTALParticipants will undergo full-arch digital implant scanning using 3D-printed auxiliary geometric devices attached to implant scan bodies. The auxiliary devices provide additional geometric reference landmarks intended to improve scanning accuracy and reduce stitching errors during complete-arch digital impressions.
Interventions
A full-arch digital implant impression will be obtained using implant scan bodies splinted with composite resin prior to scanning. The splinting procedure will provide enhanced scan body stability and will be used to minimize positional discrepancies during digital impression acquisition.
A full-arch digital implant impression will be obtained using horizontal non-calibrated scan bodies (IO Connect). The horizontal scan body design will facilitate implant position recognition, digital alignment, and accurate transfer of implant coordinates throughout the digital impression procedure.
A full-arch digital implant impression will be obtained using 3D-printed auxiliary geometric devices attached to implant scan bodies. These auxiliary devices will provide additional geometric reference landmarks to improve stitching accuracy, reduce cumulative scanning errors, and enhance complete-arch digital impression accuracy.
Eligibility Criteria
You may qualify if:
- Completely edentulous patients with age between 40-60 years.
- Adequate bone height to fulfill the criteria for implant placement.
- Patients should have a class I Angle's classification.
You may not qualify if:
- Insufficient vertical inter-arch space to accommodate the restorative components.
- \. Presence of psychiatric or neurological conditions. 3. Any systemic diseases that may affect implant bone osteointegration.
Contact the study team to confirm eligibility.
Sponsors & Collaborators
- Tanta Universitylead
Study Sites (1)
Faculty of Dentistry, Tanta University
Tanta, Gharbia Governorate, 31527, Egypt
Study Officials
- PRINCIPAL INVESTIGATOR
Mostafa Hamed Mostafa Abd El-Hameed Abd El-Hameed, BDS, MSc
Faculty of Dentistry, Tanta University, Egypt
Central Study Contacts
Mostafa Hamed Mostafa Abd El-Hameed Abd El-Hameed, BDS, MSc
CONTACT
Study Design
- Study Type
- interventional
- Phase
- not applicable
- Allocation
- RANDOMIZED
- Masking
- NONE
- Purpose
- DEVICE FEASIBILITY
- Intervention Model
- CROSSOVER
- Sponsor Type
- OTHER
- Responsible Party
- PRINCIPAL INVESTIGATOR
- PI Title
- Assistant Lecturer
Study Record Dates
First Submitted
July 28, 2026
First Posted
July 31, 2026
Study Start (Estimated)
August 8, 2026
Primary Completion (Estimated)
April 1, 2027
Study Completion (Estimated)
July 1, 2027
Last Updated
July 31, 2026
Record last verified: 2026-07
Data Sharing
- IPD Sharing
- Will not share