Conventional Impressions Versus Digital Impression Techniques for Implant Supported Screw Retained Prosthesis

Evaluation of the Accuracy of Conventional and Digital Implant Impression Techniques in Bilateral Distal Extension Cases

The purpose was to evaluate the accuracy of traditional and digital implant level impression procedures by using three-dimensional superimposition analysis , and evaluate the passive fit of screw- retained implant supported restorations fabricated using conventional and digital impression techniques in bilateral distal extension cases (class I kennedy classification)

Study Overview

• Status: Completed
• Conditions: Partial Edentulism Class 1
• Intervention / Treatment: Procedure: Implant placement

Detailed Description

Eight patients who had missing all mandibular posterior teeth except first premolars were included in this study. In each patient, 4 implants were placed, 2 in each side to support 3 units screw retained zirconia restorations. Three months after implant placement, each patient underwent two implant level impression techniques (n=8) for each technique: Conventional implant impressions CII (pick-up, splinted transfers), and digital implant impressions DII were captured with TRIOS 3 Shape intraoral optical scanner. In this study, digital impression was considered as a reference data.

• Study Type: Interventional
• Enrollment (Actual): 8
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Egypt
  • Tanta, Egypt, 3111
    • Wafaa youssif El ashry

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

• All participants have sufficient bone length and width for implant insertion.
• General health of the patients was evaluated by taking a full medical history to ensure that these patients were free from any systemic conditions that would have impaired implant osseointegration
• Good oral hygiene
• Sufficient inter-arch spaces
• The opposing arch was almost dentulous, and any missing teeth were restored using a fixed partial denture.

Exclusion Criteria:

• parafunctional habits
• Heavy smoking
• Those patients with systemic diseases that may influence soft or hard tissue healing.
• Patients with a history of radiation therapy in the head and neck region.
• Patients with a history of radiation therapy in the head and neck region.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm

Intervention / Treatment

Experimental: Accuracy of Implant impression techniques; Active comparative : digital implant impression Participants underwent intra-oral scanning digital impression Experimental : conventional implant impression Participants underwent conventional impressions And right side of pt mouth received screw retained prosthesis constructed from conventional impression left side received screws retained prosthesis constructed from digital impression

Procedure: Implant placement; 4 implants were placed , 2 implants in each side of the patient mouth opposite lower second premolar and second molar 4 implants were placed , 2 implants in each side of the patient mouth opposite lower second premolar and second molar

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Accuracy of digital and conventional implant impression techniques in partially edentulous patient	GOM Inspect 2016, Gom GmbH,) that was used to superimpose the Standard tessellation language (STL) datasets of conventional open tray impression technique onto the STL file of the reference (digital implant impression technique) to assess the accuracy and calculate the three-dimensional deviations of scan bodies in color- coding map in micrometers (µm)	12 months

Collaborators and Investigators

• Sponsor: Tanta University
• Investigators: Principal Investigator: Wafaa Y El ashry, MSc, Tanta university ,Faculty of Dentistry, Prosthodontics department; Principal Investigator: Wafaa Y El ashry, Tanta university, Faculty of Dentistry, Prosthodontics department; Principal Investigator: Wafaa Y El ashry, MSc, Tanta University

Study record dates

Study Major Dates

• Study Start (Actual): April 30, 2020
• Primary Completion (Actual): December 28, 2021
• Study Completion (Actual): December 14, 2022

Study Registration Dates

• First Submitted: June 12, 2023
• First Submitted That Met QC Criteria: June 20, 2023
• First Posted (Actual): June 22, 2023

Study Record Updates

• Last Update Posted (Actual): June 22, 2023
• Last Update Submitted That Met QC Criteria: June 20, 2023
• Last Verified: June 1, 2023

More Information

Terms related to this study

• Keywords: Digital impression; implant impression; impression accuracy; Digital work flow
• Other Study ID Numbers: RP-9-20-1

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No