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

Not Applicable

Completed

• Conditions: Partial Edentulism Class 1
• Interventions: Procedure: Implant placement

• Registration Number: NCT05912725
• Lead Sponsor: Tanta University

Brief Summary

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)

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 Timeline

• Study Start: 2020-04-30
• Primary Completion: 2021-12-28
• Study Completion: 2022-12-14
• Status Verified: 2023-06
• Study First Submitted: 2023-06-12
• Study First Submitted QC: 2023-06-20
• Last Update Submitted: 2023-06-20
• Study First Posted: 2023-06-22
• Last Update Posted: 2023-06-22

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 8

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 & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Accuracy of Implant impression techniques	Implant placement	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

Primary Outcome Measures

Name	Time	Method
Accuracy of digital and conventional implant impression techniques in partially edentulous patient	12 months	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)

Trial Locations

Locations (1)

Wafaa youssif El ashry; 🇪🇬 Tanta, Egypt