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Comparing the effectiveness of shade measurementby intraoral scanner, digital spectrophotometer...

Comparing the effectiveness of shade measurement

by intraoral scanner, digital spectrophotometer,

and visual shade assessment


Comparing the effectiveness of shade measurement by intraoral scanner, digital spectrophotometer, and visual shade assessment
Comparing the effectiveness of shade measurement by intraoral scanner, digital spectrophotometer, and visual shade assessment

Alexandra Czigola DMD | Ivett Roth DMD | Viktoria Vitai DMD |

Dora Fehér DMD | Péter Hermann DMD, PhD | Judit Borbély DMD, PhD


Abstract

Objective: Trios3 (3Shape, Denmark) intraoral scanner is complete with a tooth

shade measurement function, but there is limited information about its efficacy. This

in vivo study aimed to evaluate this function in relation to visual and spectrophotometric shade determination.


Materials and Methods: Ten dental students from Semmelweis University determined

tooth shade for 10 volunteers using Vita A1-D4 (VC) and Vita Linearguide

3D-Master (LG) guides, Vita Easyshade spectrophotometer (ES) and Trios

3 intraoral scanner (TR). First and last patient was always the same (Patient R).

Intrapersonal repeatability was calculated. Four selected shades of each tooth

were presented to student, supervisor, and patient to select best match. Selection

percentages were calculated. The supervisor's best match was the reference

(ΔE00).


Results: Median ΔE00 of Patient R: TR 1.09; VC 1.5; ES 2.35; LG 3.1. The percentages

of best match: VC 16.7%.; TR 21.64%; ES 26.58%; LG 34.08%. Median ΔE00 of

students' and supervisor's best match: LG 2.73; ES 4.29; TR 4.29; VC 16.35. TR was

the most repeatable. The most “best-match shade tabs” were selected using LG. VC

shade tabs was the least consistent with the examined teeth.


Conclusions: TR can be used for shade selection with a 3D-Master tooth color system

with visual verification.


Clinical Significance: Correct tooth shade determination is one of the most important

step in making esthetic restorations. New shade matching systems have

been developed to surpass the visual method of shade determination. There are

new intraoral scanners with built-in shade measurement functions. Digital shade

determination methods are more independent from the environmental circumstances,

and with intraoral scanners, it is easy to measure the tooth shade by

taking a digital impression at the same time. These new devices may be a reliable

alternative method for shade selection with visual verification.


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