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 Ahmed22 enrolled

Overview

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.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

NONE

Enrollment

Conditions

Edentulism

Interventions

Scanning with verification jigOTHER

Comparing Relative Implant Positions of the 4 implants in each case obtained through desktop scanning of intraoral provisional verification jig. All-on-4 treatment for mandibular and maxillary edentulous cases were scanned using the Medit i700 intraoral scanner. Scan data were imported into Exocad software, where scan-body matching was performed using the Neodent library to determine the positions of multiunit abutment analogues.

Direct intraoral scanningOTHER

Comparing Relative Implant Positions of the 4 implants in each case obtained through direct intraoral scanning without jig. All-on-4 treatment for mandibular and maxillary edentulous cases were scanned using the Medit i700 intraoral scanner. Scan data were imported into Exocad software, where scan-body matching was performed using the Neodent library to determine the positions of multiunit abutment analogues.

Eligibility

Sex: ALL

Medical Language ↔ Plain English

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.

Locations (1)

Faculty of Dentistry, Alexandria University

Alexandria, Egypt

Outcomes

Primary Outcomes

Vertical Deviation

Analogues Saved from the Intraoral scan and those saved from stone model were superimposed. The vertical discrepancy (mm) in implant position between intraoral digital scanning and verification jig-based stone model in All-on-4 implant cases.

Time frame: through study completion, an average of 1 year

Angular deviation

Analogues Saved from the Intraoral scan and those saved from stone model were superimposed. The angular difference (degrees) in implant position between intraoral digital scanning and verification jig-based stone model in All-on-4 implant cases.

Time frame: through study completion, an average of 1 year

Horizontal deviation

Analogues Saved from the Intraoral scan and those saved from stone model were superimposed. The horizontal discrepancy (mm) in implant position between intraoral digital scanning and verification jig-based stone model in All-on-4 implant cases.

Time frame: through study completion, an average of 1 year

Data from ClinicalTrials.gov

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