The evaluation of the accuracy of the 3 dimensional digital model measurements

Objective & Hypothesis:Purpose: The purpose of this study is to evaluate the accuracy of measurements made on 3-dimensional digital models obtained with a 3-dimensional scanner.

📊

Key Findings & Data:Material and Methods: 125 impressions were taken from an acrylic model (master model) that has 16 teeth, and 125 stone casts were obtained from these impressions.

💡

Conclusion & Impact:The accuracy of digital measurements was similar to the measurements on the dental casts.

🔬Design:Modeling & Simulation

📍Scope:Comprehensive Sample

⚙️Variables:Dijital model · alçı model · ölçüm doğruluğu

Abstract

Purpose: The purpose of this study is to evaluate the accuracy of measurements made on 3-dimensional digital models obtained with a 3-dimensional scanner. Material and Methods: 125 impressions were taken from an acrylic model (master model) that has 16 teeth, and 125 stone casts were obtained from these impressions. Master model and stone casts were scanned with a 3-D model scanner and 126 digital models were obtained. Four linear measurements between 4 reference points were measured on stone casts with a caliper and on digital models with computer software. The measurements obtained from the stone casts were subtracted from the measurements obtained from the master model and the same procedure was followed for digital measurements. Then the absolute differences of the results were subjected to Mann-Whitney U test. Results: Measured deviation calculated for stone casts (0,130 ± 0,11), didn’t differ statistically significantly from measured deviation found for digital models (0,131 ± 0,08), ( p=0,081). Conclusion: With in the equipments of this study, measurements made on the stone casts didn’t differ statistically significantly from measurements made on digital models. The accuracy of digital measurements was similar to the measurements on the dental casts.

Özet

Amaç: Bu çalışmanın amacı, 3 boyutlu tarayıcı ile elde edilen dijital modellerdeki ölçümlerin doğruluğunu değerlendirmektir. Gereç ve yöntem: Üzerinde 16 diş bulunan üst çene akrilik ana modelinden 125 adet alçı model elde edildi. Akrilik ana model ve alçı modellerden 3 boyutlu model tarayıcısı kullanılarak toplam 126 adet dijital model elde edildi. Belirlenen dört nokta arası, alçı modeller üzerinde kumpas yardımıyla, dijital modellerde ise bilgisayar yazılımı ile ölçüldü. Alçı modellerden elde edilen ölçümler akrilik ana modelde yapılanlardan çıkarıldı. Aynı işlem dijital ana model ve diğer 125 model için yapıldı. Çıkan sonuçların mutlak değerleri alınarak ölçüm farklılıkları Mann-Whitney U testi ile değerlendirildi. Bulgular: Alçı modellerde gözlenen ölçüm sapma miktarının (0,130 ± 0,11) , dijital modellerde gözlenen ölçüm sapma miktarından (0,131 ± 0,08) anlamlı farklılık sergilemediği bulgulandı (p=0,081). Sonuç: Bu çalışmada kullanılan ekipmanlar dâhilinde, alçı modeller üzerinde yapılan ölçümler ile dijital modeller üzerinde yapılan ölçümler arasında istatistiksel olarak anlamlı bir fark saptanmadı. Yapılan ölçümlerde; dijital modellerin, alçı modeller kadar güvenilir olduğu bulundu.

Keywords

Dijital model alçı model ölçüm doğruluğu 3shape Digital model stone casts measurement accuracy

🔖

Cite This Article

Dinçel, A. G. D. M., Gümüş, Y. D. D. H. Ö., Büyük, A. G. D. S. K., Kılınç, Y. D. D. H. İ., Bilgin, Y. D. D. M. S. (2013). The evaluation of the accuracy of the 3 dimensional digital model measurements. Current Research in Dental Sciences, Cilt: 23 Sayı: 3, 366–370. https://ajindex.com/articles/1454310

📄 Full Text PDF Viewer

Open in New Tab ↗

↗New Tab

📄

PDF görüntüleyici hazırlanıyor...

References (12)

Sousa MV, Vasconcelos EC, Janson G, et al.: Accuracy and reproducibility of 3-dimensional digital model measurements. Am J Orthod Dentofacial Orthop 2012; 142: 269-73.
Ersu B, Yüzügüllü B, Canay Ş: Sabit Restorasyonlarda CAD/CAM Uygulamaları. Hacettepe Üniv Diş Hek Fak Derg 2008; 32: 58-72.
Alcan T, Ceylanoglu C, Baysal B: The relationship between digital model accuracy and timedependent deformation of alginate impressions. Angle Orthod 2009; 79: 30-6.
Leifert MF, Leifert MM, Efstratiadis SS, et al.: Comparison of space analysis evaluations with digital models and plaster dental casts. Am J Orthod Dentofacial Orthop 2009; 136: 16 e11-14; discussion 16.
Bell A, Ayoub AF, Siebert P: Assessment of the accuracy of a three-dimensional imaging system for archiving dental study models. J Orthod. 2003; 30: 219-23.
Redlich M, Weinstock T, Abed Y, et al.: A new system for scanning, measuring and analyzing dental casts based on a 3D holographic sensor. Orthod Craniofac Res 2008; 11: 90-5.
Wandrekar S, Juszczyk AS, Clark RK, et al.: Dimensional stability of newer alginate impression materials over seven days. Eur J Prosthodont Restor Dent 2010; 18: 163-70.
Schleier PE, Gardner FM, Nelson SK, et al.: The effect of storage time on the accuracy and dimensional stability of reversible hydrocolloid impression material. J Prosthet Dent 2001; 86: 244Shaba OP, Adegbulugbe IC, Oderinu OH: Dimensional stability of alginate impression material over a four hours time frame. Nig Q J Hosp Med 2007; 17: 1-4.
Sedda M, Casarotto A, Raustia A, et al.: Effect of storage time on the accuracy of casts made from different irreversible hydrocolloids. J Contemp Dent Pract. 2008; 9: 59-66.
Imbery TA, Nehring J, Janus C, et al.: Accuracy and dimensional stability of extended-pour and conventional alginate impression materials. J Am Dent Assoc 2010; 141: 32-9.
Nassar U, Hussein B, Oko A, et al.: Dimensional accuracy of 2 irreversible hydrocolloid alternative impression materials with immediate and delayed pouring. J Can Dent Assoc 2012; 78: c2. Yazışma Adresi: Arş. Gör. Dt. Mehmet Dinçel
Erciyes Üniversitesi, Diş Hekimliği Fakültesi Protetik Diş Tedavisi Anabilim Dalı Melikgazi/KAYSERİ Tel: +90 533 630 47 54 e-mail: [email protected]