Three-dimensional Accuracy of Direct Digital Scanning for All on Four Implants in Comparison to a Custom-made Verification Jig in Fully Edentulous Patients

Yasser Ahmed

Status: Completed

Conditions: Edentulism

Treatments: Other: Direct intraoral scanning; Other: Scanning with verification jig

Study type: Interventional

Funder types: Other

Identifiers

NCT07106177

1093-05/2025

Details and patient eligibility

About

The aim of this study is to assess the three-dimensional accuracy of direct intraoral scanning in All-on-4 implant-supported prostheses by comparing intraoral scan data with a custom-made verification jig.

Enrollment: 22 patients

Sex: All

Volunteers: No Healthy Volunteers

Inclusion criteria

• Patients with complete mandibular edentulism.
• Patients requiring full-arch rehabilitation with an All-on-4 implant concept.
• Absence of systemic conditions that could affect bone healing or osseointegration.
• Adequate bone volume in the anterior mandible for implant placement without the need for additional grafting.
• Patients capable of maintaining oral hygiene

Exclusion criteria

• Patients with uncontrolled systemic diseases (e.g., diabetes, osteoporosis).
• History of head and neck radiation therapy.
• Severe parafunctional habits (e.g., bruxism).
• Patients with inadequate bone volume requiring extensive grafting procedures.
• Active periodontal or oral infections.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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22 participants in 2 patient groups

Scanning with the aid of jig

Experimental group

Treatment:

Other: Scanning with verification jig

Scanning without jig

Active Comparator group

Treatment:

Other: Direct intraoral scanning