Aðýz Ýçi Tarayýcýlarýn Aðýz Dýþý Yumuþak Dokularý Taramadaki Geçerliliðinin Deðerlendirilmesi

GÝRÝÞ ve AMAÇ: Trios3 ve iTero aðýz içi tarayýcýlarýnýn yüz protezi ölçülerinde kullanýlmak üzere aðýz dýþý yumuþak dokularý taramadaki geçerliliðinin deðerlendirilmesidir.
YÖNTEM ve GEREÇLER: Cosmesil M511 silikon elastomer kullanýlarak hazýrlanan 10 farklý kulak modeli iTero (Align Technology) ve Trios3 (3Shape) aðýz içi tarayýcýlarla taranmýþtýr. Referans tarayýcý olarak Solution X C500 tarayýcý kullanýlmýþtýr. STL formatýnda elde edilen verilerin Geomagic Control X (3D Systems) yazýlýmda üç boyutlu yüzey analizleri tamamlanmýþtýr. 20 μm tolerans sýnýrý içerisinde kalan toplam yüzey alaný, ortalama sapma, en yüksek sapma alanlarýnýn istatistiksel analizlerde Shapiro – Wilk normallik testi ile deðiþkenlerin daðýlýmýna bakýlmýþ, normal daðýlým gösteren deðiþkenlerin ölçüm karþýlaþtýrmalarýnda eþlendirilmiþ t testi, ölçümlerin güvenliðini belirlemede sýnýf içi korelasyon katsayýsý %95 GA kullanýlmýþtýr. Sonuçlar, anlamlýlýk p<0,05 düzeyinde deðerlendirilmiþtir
BULGULAR: iTero grubunun en yüksek sapma deðerleri Trios3 grubu en yüksek sapma deðerlerinden istatistiksel olarak anlamlý derecede yüksek bulunmuþtur (p=0,002). iTero grubunun ortalama sapma deðerleri Trios3 grubu ortalama sapma deðerlerinden istatistiksel olarak anlamlý derecede yüksek bulunmuþtur (p=0,049). iTero grubunun 20 μm tolerans içinde kalan alan yüzdesi Trios3 grubundan istatistiksel olarak anlamlý derecede düþük bulunmuþtur (p=0,0001). iTero grubunun 20 μm tolerans aralýðý dýþýnda kalan alan yüzdesi Trios3 grubu ortalamalarýndan istatistiksel olarak anlamlý derecede yüksek bulunmuþtur (p=0,0001).
TARTIÞMA ve SONUÇ: Ölçümlerin iç tutarlýlýklarýnýn deðerlendirilmesi sonucunda Trios3 ve iTero tarayýcýlarýnýn kesinlik deðerlendirmeleri aðýz dýþý yumuþak dokularý taramada yeterli bulunmuþtur. Referans cihazla karþýlaþtýrýldýðýnda Trios3 tarayýcýsý ile yapýlan ölçümlerin doðruluk oraný iTero tarayýcýsýnýn doðruluk deðerlerinden anlamlý derecede yüksek bulunmuþtur.

Evaluation of the Accuracy of Intraoral Scanners in Extraoral Soft Tissue Scanning

INTRODUCTION: The aim of the study was to evaluate the accuracy of Trios3 and iTero intraoral scanners for scanning extraoral soft tissues for use in facial prosthesis impressions.
METHODS: 10 different ear models prepared using Cosmesil M511 silicone elastomer were scanned with intraoral scanners iTero and Trios3. Solution X C500 scanner was used as the reference scanner. Three-dimensional surface analysis of the data obtained was completed in Geomagic Control X software. Ratio of area deviating less than 20 µm, average deviation, and the highest deviation points were evaluated statistically. The distribution of the variables was examined using the Shapiro-Wilk normality test. Paired t-test was used for measurement comparisons of normally distributed variables. In-class correlation coefficient 95% CI was used to determine the safety of the measurements. The results were evaluated at the significance level of p<0.05.
RESULTS: The highest deviation values of the iTero group were statistically significantly higher than the highest deviation values of the Trios3 group (p=0.002). The mean deviation values of the iTero group were found to be statistically significantly higher than the mean deviation values of the Trios3 group (p=0.049). The percentage of area within 20 μm tolerance of the iTero group was statistically significantly lower than Trios3 group (p=0.0001).
DISCUSSION AND CONCLUSION: The precision evaluations of the Trios3 and iTero scanners were found to be sufficient for scanning extraoral soft tissues. Compared to the reference device, the accuracy of the measurements made with the Trios3 scanner was found to be significantly higher than the accuracy of the iTero scanner.