Trueness and precision of complete arch dentate digital models produced by intraoral and desktop scanners: An ex-vivo study.

Objectives: The study aimed to compare the trueness and precision of five intraoral scanners (Emerald S, iTero Element 5D, Medit i700, Primescan, and Trios 4) and two indirect digitization techniques for both teeth and soft tissues on fresh mandibular and maxillary cadaver jaws.

Methods: The maxilla and mandible of a fully dentate cadaver were scanned by the ATOS industrial scanner to create a master model. Then, the specimens were scanned eight times by each intraoral scanner (IOS).

Evaluation of the accuracy of multiple digital impression systems on a fully edentulous maxilla.

Objective: This study aimed to compare the accuracy performance of five different intraoral scanning systems for a full-arch scan on an edentulous cadaver maxilla.

Method And Materials: Five digital intraoral impression systems were used to scan a fully edentulous cadaver maxilla. A master scan obtained with an ATOS Capsule industrial grade scanner provided the point of comparison.

Evaluation of complete-arch implant scanning with 5 different intraoral scanners in terms of trueness and operator experience.

Statement Of Problem: The intraoral scanning of the edentulous arch might be challenging for an inexperienced operator because of the large mucosal area and the use of scan bodies.

Purpose: The purpose of this ex vivo study was to compare the trueness of 5 intraoral scanners in replicating implant scan bodies and soft tissues in an edentulous maxilla and to investigate the effects of operator experience.

Material And Methods: The maxilla was resected from a fresh cadaver, 5 implants placed, and a reference scan made.

The effect of software updates on the trueness and precision of intraoral scanners.

Objectives: The goal of the study was to determine the effects of software updates on the trueness and precision of digital impressions obtained with a variety of intraoral scanner (IOS) systems.

Method And Materials: Seven IOS systems were investigated. Each system was tested using two versions of software, with the second version being the latest at the time of conducting the study.

The effect different substrates have on the trueness and precision of eight different intraoral scanners.

Objective: This in vitro study compares the newest generation of intraoral scanners to their older counterparts, and tests whether material substrates affect the trueness and precision of intraoral scanners (IOS).

Material And Methods: A custom model, used as the reference standard, was fabricated with teeth composed of different dental materials. The reference standard scan was obtained using a three-dimensional (3D) optical scanner, the ATOS III.

Effect of scan substrates on accuracy of 7 intraoral digital impression systems using human maxilla model.

Objective: This study aimed to determine how the accuracy of digital impressions was affected by four common dental substrates using seven prevalent IOS systems to scan the complete arch of a human maxilla.

Setting And Sample Population: The Department of Oral Rehabilitation at the Medical University of South Carolina. A single cadaver maxilla.

Evaluation of the trueness and precision of complete arch digital impressions on a human maxilla using seven different intraoral digital impression systems and a laboratory scanner.

Objectives: An impression accuracy study using a cadaver maxilla was performed using both prepared and intact teeth as well as palatal tissue.

Materials And Methods: Three crown preparations were performed on a cadaver maxilla. Seven different digital impression systems along with polyvinylsiloxane impressions were used to create digital models of the maxilla.

Effect of scan pattern on complete-arch scans with 4 digital scanners.

Statement Of Problem: Complete-arch digital scans are becoming popular as digital dentistry is adopted for expanded clinical situations such as complete-arch prostheses, removable prostheses, extensive implant-supported treatment, and orthodontic aligners. Whether the scan pattern technique affects the trueness and precision of complete-arch scans and whether differences in accuracy exist among different scanners remain unclear. Furthermore, each manufacturer recommends a different scan pattern, but evidence of the superiority of the manufacturer's recommended pattern is lacking.

Evaluation of the effect scan pattern has on the trueness and precision of six intraoral digital impression systems.

Objective: Clinicians have been slow to adopt digital impression technologies due possibly to perceived technique sensitivities involved in data acquisition. This research has two aims: determine whether scan pattern and sequence affects the accuracy of the three-dimensional (3D) model created from this digital impression and to compare the 5 imaging systems with regards to their scanning accuracy for sextant impressions.

Materials And Methods: Six digital intraoral impression systems were used to scan a typodont sextant with optical properties similar to natural teeth.

Anatomic Customization of Root-Analog Dental Implants With Cone-Beam CT and CAD/CAM Fabrication: A Cadaver-Based Pilot Evaluation.

Existing root-analog dental implant systems have no standardized protocols regarding retentive design, surface manipulation, or prosthetic attachment design relative to the site's unique anatomy. Historically, existing systems made those design choices arbitrarily. For this report, strategies were developed that deliberately reference the adjacent anatomy, implant and restorable path of draw, and bone density for implant and retentive design.

A novel technique for reference point generation to aid in intraoral scan alignment.

Objective: When using a completely digital workflow on larger prosthetic cases it is often difficult to communicate to the laboratory or chairside Computer Aided Design and Computer Aided Manufacturing system the provisional prosthetic information. The problem arises when common hard tissue data points are limited or non-existent such as in complete arch cases in which the 3D model of the complete arch provisional restorations must be aligned perfectly with the 3D model of the complete arch preparations. In these instances, soft tissue is not enough to ensure an accurate automatic or manual alignment due to a lack of well-defined reference points.

Evaluation of the accuracy of 7 digital scanners: An in vitro analysis based on 3-dimensional comparisons.

Statement Of Problem: As digital impressions become more common and more digital impression systems are released onto the market, it is essential to systematically and objectively evaluate their accuracy.

Purpose: The purpose of this in vitro study was to evaluate and compare the trueness and precision of 6 intraoral scanners and 1 laboratory scanner in both sextant and complete-arch scenarios. Furthermore, time of scanning was evaluated and correlated with trueness and precision.