Can Dental Office Lighting Intensity Conditions Influence the Accuracy of Intraoral Scanning?

Anca Jivanescu,Andrei-Bogdan Faur,Raul Nicolae Rotar,Heng Bo Jiang

doi:10.1155/2021/9980590

Anca Jivanescu, Andrei-Bogdan Faur + Show 2 more

Open Access

https://doi.org/10.1155/2021/9980590

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Abstract

The aim of this study was to evaluate the influence of different settings of ambient light intensity inside the dental office on the accuracy (trueness and precision) of an intraoral scanner (IOS). A full crown preparation was conducted on a resin molar which was scanned using a high resolution extraoral scanner to obtain a reference model. Six light settings were chosen based on the most clinically relevant light conditions inside the workspace, and the preparation was scanned using an intraoral scanner (PlanScan, Planmeca). The obtained data was analyzed using a professional 3D quality control software (Geomagic Control X). There was no statistically relevant difference between the groups when regarding trueness, although a slight influence of the light intensity could be observed on the trueness values. Regarding precision, the best results were obtained in the 3800 lux group, with the other groups presenting close values, excepting the extreme values (400 lux and 11 000 lux) groups that proved to be the most deficient.

Highlights

The development of technology applicability in dentistry and the trend towards digitalization with regard to all the potential benefits that come with it have brought great improvements in the intraoral scanners (IOS), making them more accurate and reliable than ever before [1,2,3,4,5]
Another study conducted by Toshio Arakida et al [20] observed the influence of ambient light on the accuracy and speed of scanning and concluded that under the condition of 500 lux and 3900 K; the trueness of the digital impression was highest among the test groups, and regardless of the color temperature, the time needed for the digital impression was longer at 2500 lux than at 0 lux or 500 lux
The present study evaluated clinically relevant light intensity values that are common inside most of the dental offices and that could be obtained without any additional lighting devices

Summary

Introduction

The development of technology applicability in dentistry and the trend towards digitalization with regard to all the potential benefits that come with it have brought great improvements in the intraoral scanners (IOS), making them more accurate and reliable than ever before [1,2,3,4,5]. The accuracy of an intraoral scanner can be influenced by many factors including the hardware and software technology of the intraoral scanner [12,13,14]; the scanning protocol [15,16,17,18]; the calibration process of the IOS [14]; the scanned surface traits like texture, height, and geometry [19]; and the light intensity and color temperature of the ambient lighting conditions [20,21,22,23,24,25] Most of these factors cannot be manipulated in any way by the clinician; the ambient lighting conditions can be modified to certain parameters only for the scanning stage, with no cost and insignificant time consumption. Some clinical studies confirmed that the ambient lighting has a significant influence over the accuracy of an intraoral scanner [22, 23]

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