We are using cookies to implement functions like login, shopping cart or language selection for this website. Furthermore we use Google Analytics to create anonymized statistical reports of the usage which creates Cookies too. You will find more information in our privacy policy.
OK, I agree I do not want Google Analytics-Cookies
International Journal of Esthetic Dentistry  (English Edition)



Forgotten password?


Int J Esthet Dent 4 (2009), No. 3     24. Aug. 2009
Int J Esthet Dent 4 (2009), No. 3  (24.08.2009)

Page 278-292, PubMed:19704928

Micro-CT Evaluation of the Marginal Fit of Different In-Ceram Alumina Copings
Pelekanos, Stavros / Koumanou, Maria / Koutayas, Spiridon-Oumvertos / Zinelis, Spiridon / Eliades, George
The aim of the study was to evaluate the marginal fit of different In-Ceram alumina ceramic cores manufactured by four different techniques.
Four groups of four In-Ceram alumina core specimens (Vita), each 0.6 mm in thickness, were fabricated from a master die using four different techniques: Group SL, the slip-cast technique (In-Ceram system); Group CL, the copy-milling technique (Celay system); Group CR, a CAD/CAM system (Cerec inLab system) and Group WO, the electro-deposition dipping technique (Wol-Ceram). After the core specimens were fitted on the master die, they were scanned with the use of a microtomography device (1072 micro-CT, Sky- Scan). Datasets were processed by software (TView v1.1, SkyScan) and 10 vertical sections from each core were generated. On these microtomographic cross-sections the marginal gap (MG) and the absolute marginal discrepancy (MD) were measured in microscale (µm).
The slip-cast and the electro-deposition dipping techniques presented the best results of MG with 22 µm and 35 µm, respectively (α<5%). The CAD/ CAM system presented an MG of 55 µm. In addition, the slip-cast and the electro-deposition dipping techniques presented the best results of MD with 50 µm and 60 µm, respectively (α<5%).
The slip-cast technique and the Wol-Ceram system presented the best marginal fit, followed by Cerec inLab, which presented clinically acceptable results. Microtomography analysis seemed to be a reliable method of evaluating the marginal fit of dental restorations.