Health TrialsbyHealthPanel

Effect of Scanning Techniques on Accuracy of Mandibular Fixed Detachable Prostheses

ConditionFull Arch Implant Rehabilitation
Trial statusRecruiting
Trial phaseNot applicable
Trial typeInterventional
Biological sexAll
Age40-60
SponsorTanta University

About this trial

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.

Eligibility criteria

This trial accepts healthy volunteers

Qualifiers

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.

Disqualifiers

None

Trial design

Design model

Crossover

Treatments tested in this trial

  • Splinted Scan Body with composite

    Device

    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.

  • IO Connect Scanning Technique

    Device

    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.

  • Auxiliary Geometric Device Scanning Technique

    Device

    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.

Treatment groups

7 Participants
are divided into 3 treatment groups
Group A: Splinted Scan Bodies with compositeExperimental treatment 1 intervention
Group B: horizontal non-calibrated scan bodiesExperimental treatment 1 intervention
Group C: Auxiliary Geometric Device ScanningExperimental treatment 1 intervention

Trial outcomes

Primary outcomes

1

Implant linear and angular deviation

The linear and angular deviations of implants will be compared and analyzed across different scanning techniques against each other

Time frame
Immediately after completion of digital scanning day 0
2

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.

Time frame
Immediately after completion of digital scanning day 0

Secondary outcomes

1

fit of verification jig

Passive fit will be evaluated clinically using the Sheffield one-screw test and confirmed by intraoral periapical radiographs.

Time frame
Within 1 hour of fabrication and intraoral placement of the verification jig

Other outcomes

Sponsors and contacts

Click on the lead sponsor to view all of their trials.

Tanta University

Lead sponsor

Source ClinicalTrials.gov
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