Comparison of Accuracy of Full-arch Implant Digital and Conventional Impressions.

The goal of this clinical trial is to determine whether the accuracy of digital impressions is comparable to conventional impressions. It will also learn about the clinical effect of different method. The main questions it aims to answer are: Does drug ABC lower the number of times participants need to use a rescue inhaler? What medical problems do participants have when taking drug ABC? Researchers will compare digital impression to conventional impression to see if the accuracy of the digital method.

Participants will:

Take an impression with one of the methods Visit the clinic a total of 6 times for checkups and tests

Enrolling by Invitation

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Key information

Conditions

Edentulous Jaw Jaw Diseases Jaw, Edentulous Mouth Diseases Mouth, Edentulous Musculoskeletal Diseases Stomatognathic Diseases Tooth Diseases

Age range

30 year–80 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Shanghai ninth people's hospital

Shanghai, China

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

Aged 30-80 years (inclusive) with no gender restriction.
Patients who will receive a full-arch one-piece implant-supported fixed
permanent restoration in the maxilla or mandible.
Patients with osseointegrated implants after surgery.
Patients voluntarily participate in the trial and sign the informed consent form.

Exclusion criteria

Patients with insufficient interarch space in the posterior region for impression coping placement.
Patients with minimal inter-implant distance may prevent impression coping installation.
Patients with temporomandibular joint (TMJ) disorders are unable to maintain prolonged mouth opening for impression procedures.
Other conditions deemed ineligible for inclusion by the investigator.

Treatment and study plan

digital impression

Procedure

complete arch implant impression with intraoral photogrammetry

conventional impression

Procedure

conventional open tray splint impression

Primary outcomes

Vision and tactile score for evaluating passive fit of metal framework

Time frame: Periprocedural: At the time of the titanium framework try-in: the try-in of the framework to the patient is before final delivery. (The delivery of the final prosthesis is the baseline)

Five aspects are evaluated, each aspect is scored as 0 or1. The score ranges from 0 to 5 points. 1、Framework rocking upon seating？2、 Gap assessment with single screw test. The method utilized an explorer with an approximately Ø60-µm tip to evaluate the margins of the metal framework.3、 Gap assessment with all screws tightened. 4、Are the screws threading smoothly? 5、Radiographic assessment of framework fit (check for gaps).

Sponsors and collaborators

Lead sponsor

Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University

Other

Registry information

Official study title

Comparison of the Accuracy of Digital and Conventional Impression in Edentulous Arch

Important dates

Study start: 2025
Primary completion: 2026
Study completion: 2026
First posted: Sep 24, 2025
Registry last updated: Jun 10, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Published trials that share one or more normalized conditions with this study.

Completed