Effect of Scanning Techniques on Accuracy of Mandibular Fixed Detachable Prostheses | NCT07740265

NCT07740265

Overview

NCT ID: NCT07740265
Lead Sponsor: Tanta UniversityOTHER
Official Title: Influence of Three Different Scanning Techniques on Scanning Accuracy for Mandibular Fixed Detachable Prosthesis (A Cross Over Study).
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.
Conditions: Dental Prosthesis, Implant-Supported
Prosthodontics
Complete Edentulism
Full Arch Implant Rehabilitation

Status and Timeline

Status: Recruiting
Last Update Posted: Jul 31, 2026Actual
Start Date: Aug 8, 2026Estimated
Primary Completion Date: Apr 1, 2027Estimated
Completion Date

Participation Criteria

Ages Eligible for Study: Adult (18-64)
Sexes Eligible for Study: All
Accepts Healthy Volunteers?: Yes
Eligibility Criteria: Inclusion Criteria:

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.

Exclusion Criteria:

1-. Insufficient vertical inter-arch space to accommodate the restorative components.

2. Presence of psychiatric or neurological conditions. 3. Any systemic diseases that may affect implant bone osteointegration.

Study Plan

Study Type: Interventional
Phase: Not Applicable
Enrollment: 7Estimated
Primary Purpose: Device Feasibility
Allocation: Randomized
Interventional Model: Crossover Assignment
Masking: None (Open Label)

Contacts and Locations

Central Contacts: Mostafa Hamed Mostafa Abd El-Hameed Abd El-Hameed, BDS, MScContact
mostafa_hamed@dent.tanta.edu.eg

Similar Studies

Participant Group/Arms

Splinted Scan Bodies with compositeExperimental

Participants 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.

Device: Splinted Scan Body with composite

horizontal non-calibrated scan bodiesExperimental

Participants 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.

Device: IO Connect Scanning Technique

Auxiliary Geometric Device ScanningExperimental

Participants 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.

Device: Auxiliary Geometric Device Scanning Technique