Evaluation of Impression Accuracy: Digital Scanner Versus Analog Technique

University of Milan

Status: Completed

Conditions: Accuracy and Precision of Noninvasive Measurement

Treatments: Other: Digital impression; Other: impression

Study type: Observational

Funder types: Other

Identifiers

NCT07252869

1361

Details and patient eligibility

About

The goal of this study is to evaluate the accuracy of intraoral impressions obtained using the Trios 3Shape® and Carestream CS 3600™ scanners, as well as traditional analog impressions using polyvinyl siloxane (PVS), in comparison to a gold standard represented by a laboratory scanner in 51 dental models from 42 patients affected by partial edentulism who required at least two implants.

Researchers compare Trios 3Shape®, Carestream CS 3600™ and polyvinyl siloxane (PVS) to see if there is a different accuracy.

Enrollment: 51 patients

Sex: All

Ages: 18 to 80 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Age between 18 and 80 years;
• Implant placement in healed bone sites (at least 8 weeks post-tooth extraction or at least 6 months after regenerative procedures), allowing guided implant insertion of at least 3.3 mm in diameter or 8.5 mm in length;
• Implant site without ongoing infections or dental extraction residues;
• Good systemic health conditions and adequate oral hygiene;
• Periapical and periodontal health of opposing teeth/implants in occlusion;
• Edentulism of at least two adjacent dental elements.

Exclusion criteria

• Ongoing diseases requiring prolonged use of corticosteroids;
• Leukocyte dysfunction or deficiencies;
• Severe hemophilia;
• Current pregnancy;
• Past and/or current head/neck radiotherapy and/or chemotherapy;
• Renal insufficiency;
• Past and/or current use of bisphosphonates;
• Uncompensated endocrine disorders;
• Physical disabilities preventing adequate oral hygiene;
• Alcohol abuse and drug use;
• Smokers (>10 cigarettes/day);
• Untreated periodontitis;
• Mucosal diseases (e.g., erosive Lichen Planus);
• Severe parafunctional habits (e.g., bruxism or clenching);
• Persistent intraoral infections;
• Allergies or adverse reactions to restorative materials;
• Completely edentulous arches;
• Limited mouth opening;
• Inadequate oral hygiene or lack of motivation for self-care;
• Uncontrolled systemic diseases;
• Untreated or chronic oral cavity diseases;
• Fully edentulous arches.

Trial design

51 participants in 3 patient groups

TRIOS®-3Shape Group

Description:

Participants whose models were scanned using the TRIOS®-3Shape intraoral digital scanner. The deviation from the reference model was calculated to assess the accuracy of this technique.

Treatment:

Other: Digital impression

CS 3600® Carestream Group

Description:

Participants whose models were scanned using the CS 3600® Carestream Dental intraoral scanner. The deviation from the reference model was analyzed to evaluate the technique's precision.

Treatment:

Other: Digital impression

PVS Analog Impression Group

Description:

Participants whose impressions were taken using conventional polyvinylsiloxane (PVS) material. Cast models were scanned and compared to the reference to determine the accuracy of analog impressions.

Treatment:

Other: impression