Assessing the Influence of Implant Scanning Techniques on the Accuracy of Maxillary Complete-Arch Digital Scans for Implant Overdentures: A Comparative Clinical Study

NCT07295899 | Not Yet Recruiting DMC

• 1 other identifier: 47/17.07.2025
• Study Type: observational
• Target: 1
• Locations: 0 countries
• Sites: N/A

Brief Summary

Recently different protocols have been developed for the implementation of intraoral scanning in full-arch implant workflows, as horizontal scan body scanning, 1 reverse scanning 2 and scan body systems with an integrated verification jig 3 . The aforementioned approaches are aiming to reduce the inaccuracies related with the implementation of intraoral scanners in full-arch implant cases and to improve the efficiency of the whole digital workflow. However the efficiency of these methods and the parameters that can influence their accuracy, as the design of the scan body have not been investigated. The purpose of the present in vivo study is to compare the trueness and the precision of the recorded implant's position, between conventional and novel implant acquisition protocols.

Conditions

Maxillary Complete-arch Digital Scans for Implant-supported Overdentures

Keywords

Overdenture; Intraoral scanner; Accuracy; Implants

Outcome Measures

Primary Outcomes (1)

• Linear measurements

  The difference in the linear position between the control and each investigation method would be calculated.

  Through study completion, an average of 1 year, after the execution of all intraoral scans. (Cross-sectional)

Study Arms (3)

Scan body (Conventional)

Device: Intraoral scanning

Scan body (Reverse design)

Device: Intraoral scanning

Scan body (Apollo design)

Device: Intraoral scanning

Interventions

Intraoral scanning DEVICE

Different designs of scanbodies will be used

Scan body (Apollo design); Scan body (Conventional); Scan body (Reverse design)

Eligibility Criteria

• Age: 18 Years+
• Sex: male
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

Dental clinical patients

You may qualify if:

• implants places in fully edentelous patient that is planned to be treated with implant supported overdenture

You may not qualify if:

• Diseases / Conditions That Can Contraindicate Dental Treatment
• Uncontrolled Systemic Conditions
• Dental procedures-especially invasive ones-are often postponed if the condition is not medically stable:
• Uncontrolled Hypertension
• BP typically \>180/110 mmHg is considered unsafe for elective dental care.
• Risk: stroke, heart attack during treatment.
• Uncontrolled Diabetes
• High blood glucose (e.g., \>300 mg/dL) increases infection risk and poor healing.
• Uncontrolled Thyroid Disease
• Hyperthyroidism raises risk of thyroid storm, especially with epinephrine.
• Recent Major Cardiac Events
• Elective dental treatment is usually deferred for:
• Heart attack (MI) within past 6 months
• Stroke within past 6 months
• Unstable angina

Sponsors & Collaborators

• National and Kapodistrian University of Athens: lead

Related Publications (6)

• Wu HK, Wang J, Chen G, Huang X, Deng F, Li Y. Effect of novel prefabricated auxiliary devices attaching to scan bodies on the accuracy of intraoral scanning of complete-arch with multiple implants: An in-vitro study. J Dent. 2023 Nov;138:104702. doi: 10.1016/j.jdent.2023.104702. Epub 2023 Sep 14.

  PMID: 37714453 RESULT

• Carneiro Pereira AL, Souza Curinga MR, Melo Segundo HV, da Fonte Porto Carreiro A. Factors that influence the accuracy of intraoral scanning of total edentulous arches rehabilitated with multiple implants: A systematic review. J Prosthet Dent. 2023 Jun;129(6):855-862. doi: 10.1016/j.prosdent.2021.09.001. Epub 2021 Oct 13.

  PMID: 34656307 RESULT

• Gomez-Polo M, Donmez MB, Cakmak G, Yilmaz B, Revilla-Leon M. Influence of implant scan body design (height, diameter, geometry, material, and retention system) on intraoral scanning accuracy: A systematic review. J Prosthodont. 2023 Dec;32(S2):165-180. doi: 10.1111/jopr.13774. Epub 2023 Oct 18.

  PMID: 37771200 RESULT

• Revilla-Leon M, Smith Z, Methani MM, Zandinejad A, Ozcan M. Influence of scan body design on accuracy of the implant position as transferred to a virtual definitive implant cast. J Prosthet Dent. 2021 Jun;125(6):918-923. doi: 10.1016/j.prosdent.2020.03.019. Epub 2020 May 31.

  PMID: 32493568 RESULT

• Papaspyridakos P, Bedrossian A, Kudara Y, Ntovas P, Bokhary A, Chochlidakis K. Reverse scan body: A complete digital workflow for prosthesis prototype fabrication. J Prosthodont. 2023 Jun;32(5):452-457. doi: 10.1111/jopr.13664. Epub 2023 Mar 3.

  PMID: 36779654 RESULT

• Giglio GD, Giglio AB, Tarnow DP. A Paradigm Shift Using Scan Bodies to Record the Position of a Complete Arch of Implants in a Digital Workflow. Int J Periodontics Restorative Dent. 2024;44(1):115-126. doi: 10.11607/prd.6733.

  PMID: 37552170 RESULT

Central Study Contacts

Panagiotis Ntovas, DDS, MSc

CONTACT

+306985122220; pan.ntovas@gmail.com

Study Design

• Study Type: observational
• Observational Model: CASE ONLY
• Time Perspective: CROSS SECTIONAL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: PhD Canditate, Department of Operative Dentistry, School of Dentistry, Greece

Study Record Dates

• First Submitted: November 28, 2025
• First Posted: December 22, 2025
• Study Start: December 15, 2025
• Primary Completion: December 25, 2025
• Study Completion: January 15, 2026
• Last Updated: December 22, 2025

Record last verified: 2025-12

Data Sharing

• IPD Sharing: Will not share