Enhancing intraoral scanner accuracy using scan aid for multiple implants in the edentulous arch: An in vivo study.

Objectives: Intraoral scans of multiple implants in the edentulous arch are challenged by the absence of a distinct surface morphology between scan bodies. A scan aid was applied in such situation and evaluated for intraoral scanning accuracy in vivo.

Materials And Methods: 87 implants in 22 patients were scanned with scan aid (SA) and without scan aid (NO) using two different intraoral scanners (CS3600 [CS] and TRIOS3 [TR]).

Accuracy of intraoral scans: An in vivo study of different scanning devices.

Statement Of Problem: The accuracy of intraoral scanners is a prerequisite for the fabrication of dental restorations in computer-aided design and computer-aided manufacturing (CAD-CAM) dentistry. While the precision of intraoral scanners has been investigated in vitro, clinical data on the accuracy of intraoral scanning (IOS) are limited.

Purpose: The purpose of this clinical study was to determine the accuracy of intraoral scanning with different devices compared with extraoral scanning.

Dentofacial Composition: An Entire Aesthetic Concept.

The aesthetic appearance of the mouth region, in addition to the eye and nose area, is the impressive element for facial aesthetics. Therefore, the reconstruction of the intraoral region is very important for the facial aesthetics in the case of genetic dysplasia, trauma, or even in cases for rejuvenating purposes only. The entire region is complex so that in many patient cases only the team work of restorative dentists, surgeons, and orthodontists will be effective.

The Influence of Torque Tightening on the Position Stability of the Abutment in Conical Implant-Abutment Connections.

The influence of repeated system-specific torque tightening on the position stability of the abutment after de- and reassembly of the implant components was evaluated in six dental implant systems with a conical implant-abutment connection. An established experimental setup was used in this study. Rotation, vertical displacement, and canting moments of the abutment were observed; they depended on the implant system (P = .

Analysis of soft tissue display during enjoyment smile. Part II: elder Caucasians.

Esthetic parameters in elder patients are essential in esthetic oral rehabilitation. To date, no study has quantified the amount and frequency of soft tissue display in the papilla area in patients over 50 years of age. Photographic examination of 42 fully dentate patients with a mean age of 59 years was performed during enjoyment smile.

Impact of abutment rotation and angulation on marginal fit: theoretical considerations.

Purpose: Rotational freedom of various implant positional index designs has been previously calculated. To investigate its clinical relevance, a three-dimensional simulation was performed to demonstrate the influence of rotational displacements of the abutment on the marginal fit of prosthetic superstructures.

Materials And Methods: Idealized abutments with different angulations (0, 5, 10, 15, and 20 degrees) were virtually constructed (SolidWorks Office Premium 2007).