Recent Advances in Dental Optics Part I: 3D Intraoral Scanners for Restorative Dentistry

The accuracy of a scanning system determines the final accuracy of the prosthesis - which is an important component of CAD - CAM, so we decided to measure the accuracy of both intraoral and extraoral scanners. The performance of the intraoral scanner is influenced by the geometry of the scanned object and the fact that the scanner accumulates the scanned image and tracks the scanning path of the object to get a complete image. In this study, the accuracy was evaluated using the spherical model described in ISO 12836 [21].

The objective of this clinical study was to determine the accuracy of the intraoral scan of the different devices compared to the extraoral scan. In this study we selected the spherical model of the scanning object and obtained the final results of the data analysis with 3D adjustment. In terms of truthfulness and precision, scanners and lights differed from each other and there were no significant differences between the trio cerec.

The accuracy of intraoral scans is a prerequisite for the production of CAD / CAM for dentistry. However, there are only few research comparisons between the Itero Trios scanner and in vivo full bow scans. Further studies are needed to assess the scanning accuracy based on the experience of physicians.

In individual setups, the truthfulness and precision in the trio scanner is higher than in the itero [33, 34]. However, there is a high degree of inaccuracy when scanning the distance of the dental arch.

To overcome these difficulties, the Impressions IOS intraoral scanner was developed for dental offices [4]. However, clinical intraoral scans did not lead to an acceptable accuracy for complete arc scans. The introduction of IOS in dental practices coincided with the development of CAD / CAM, a computer-aided design and fabrication technology for dentistry that provides numerous benefits to the practice.

Three-dimensional palpation of the mouth is required for a variety of dentistry interventions, such as restorative dentistry and orthodontics.12 In the 1980s, Swiss dentist Dr. Werner Mormann and Italian electrical engineer Marco Brandestini introduced the first digital intraoral scanner in dentistry. Intraoral scanners with CAD / CAM technology (computer-assisted design and manufacturing) enable simple planning of treatment cases, accept and communication with the laboratory, reduce the need for surgical time and storage and shorten the treatment time [5-7].

Cerec (r) Lava (tm) Co.s utilize blue light emitting diodes (LEDs) and laser-based light sources, while Itero Align Technologies (San Jose, California) uses iOS scanning E4D and D4D technology (Richardson, Texas) [4].

This analysis points to an increasing trend in research into 3D scanning applications in the field of dentistry. In dentistry, 3D scanners capture data projected from a light source onto objects such as teeth, dental arches, implants and body scans. 3D scanning models and technologies help technicians advise patients.

Due to the limited optical window size of the image, recombination errors can occur when scanning with B / W intraoral scanners under certain conditions. The truth can be assessed by comparing an experimental model of the respective intraoral scanner with a reference scanner and comparing the results with a virtual cast.

High-precision industrial scanners with accuracy of 10 micrometers per 100,000 scan points were used as a reference to assess the truthfulness and precision of intraoral scanners. The scans were recorded with a trios-3shape intraoral scanner and a D700 extra-oral scanner with the same examiner in a predetermined sequence21. Intraoral scanning with the 3shape scanner started with the distal teeth in the third quadrant and continued to the front tooth, 22 in the fourth quadrant the scan began with the posterior teeth. The examination of the maxilla began with the distal tooth in the second quadrant and ended with the central incisor.

With respect to the previous study on clinical acceptance of plaster models the difference between the two scanners (less than 0.07 mm) and our results suggest that both scanners can be used in clinical orthodontics. There is a need to determine the current state of application of 3D scanning technology in the dental field. Therefore, we had to identify different scanning technologies and the creation of physical 3D dental models before we introduced 3D scans.

In the current scenario, 3D scanning technology is gaining in many areas, including education, medicine and design, contributing to the development of design, manufacturing and prototypes. Design, manufacturing and inspection are part of this technology and play a primary role in complex surfaces. For reverse engineering and inspection, the 3D scanner can be a useful tool as it takes less time to capture digitized surface data.

The development of digital dentistry has led to increased and improved use of three-dimensional (3D) technology for assessing and treating patients. In the last three decades CAD (computer assisted manufacturing) and CAM (intraoral scanning) devices have become widely used in dentistry.

This review provides an overview of the benefits, limitations and clinical application of intraoral scanners and serves as a first guide for those unfamiliar with intraoral scanning technology. Intraoral cameras and 3D scanners can enhance oral health experiences for a variety of applications, including the development of precision all-ceramic crowns, veneers, inlays, occlusal protection and assistance implants. Ten intraoral scanners for restorative dentistry in developing countries.

The aim of an intraoral scanner is to capture the 3D geometry of an object in order to produce custom dental devices. The basics of intraoral scanning relate to the structured light emitted by the object scanned by the handheld device. The image of the object is captured by an image sensor on the device and processed by software.

Logozzo-Franceschini G, Kilpela A, Oy D, Governi La: Comparative analysis of intraoral 3D digital scanners for restorative dentistry. Aim of ambient light on scanning true, precision and time in intraoral scanners, Arakida T, Kanazawa M, Iwaki M, Suzuki T, Minakuchi S.

In 2014, the global market for intraoral scanners was estimated at US $553 million and will grow at an annual rate of 13.9 percent between 2015 and 2022 [1]. In a questionnaire that examined preferences for digital imprint capture and the use of two types of intraoral scanners for image processing and video sequencing, the responses for both types of scanner were overwhelmingly positive. These preferences were higher among age groups more familiar with digital technologies, and due to these high preferences, these scanners are expected to be widely used in dentistry [2].

Over the past decade, the number of optical and iOS devices has increased, and these devices are based on different technological choices that have implications for clinical use.