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Passivity of Full-Arch Co-Cr Maxillary Prostheses Using IOS

NCT07370701 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 7

Last updated 2026-01-27

No results posted yet for this study

Summary

Statement of the problem: Accurate digital scans of edentulous patients is challenging due to the absence of anatomic landmarks and geometric variations along the dental arch. Whether adding an auxiliary geometric device (AGD) will improve scanning is unclear.

Purpose: The aim of the study is to analyze the accuracy of complete-arch digital scans of completely edentulous arches by placing auxiliary geometric device.

Material and Methods: This in vivo study included patients who received complete arch screw-retained prostheses supported by 4 implants. Seven patients were randomly chosen; a dual scan protocol was performed for digital implant planning. Surgical guide and AGD were 3d printed. Three different data acquisition methods for each individual: Open tray impression digitized by extraoral scanner (EO Group), Intraoral scan by using Medit i600 with AGD (M600 Group), and Intraoral scan (CEREC Primescan; Dentsply Sirona) with AGD (PS Group). A reference model was formed to check the accuracy of these 3 data acquisitions. The framework was designed and printed for the 3 groups to be placed in the reference model to check the passivity. Passivity was tested through modified 1-screw test by measuring the marginal gap by using a digital camera (add magnification). Each framework was placed in the patient's mouth to re-check the passivity, the best one was delivered to the patient after 4 months after osteointegration of the implants.

Conditions

  • Passivity of Co-Cr Full-arch Maxillary Prostheses Via IOS

Interventions

OTHER

Open tray impression technique

dental implant then open tray impression technique

OTHER

Auxiliary Geometric Device (M600)

analyze the accuracy and passivity of complete-arch digital scans of completely edentulous arches by placing auxiliary geometric device

OTHER

Auxiliary Geometric Device (PS)

analyze the accuracy and passivity of complete-arch digital scans of completely edentulous arches by placing auxiliary geometric device

Sponsors & Collaborators

  • Ain Shams University

    lead OTHER

Principal Investigators

  • Yasmin H Abd El Hay Dawoud · Ain Shams University

Study Design

Allocation
RANDOMIZED
Purpose
DIAGNOSTIC
Masking
DOUBLE
Model
CROSSOVER

Eligibility

Min Age
50 Years
Max Age
70 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2023-06-08
Primary Completion
2025-03-05
Completion
2025-09-05

Countries

  • Egypt

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07370701 on ClinicalTrials.gov