Abstract:
:The purpose of this study was to investigate the effect of modifying aluminum oxide slips with magnesium oxide (MgO) to create a jointing material for In-Ceram Alumina. Jointed In-Ceram Alumina bars with In-Ceram Alumina slips containing 0-1.0 mass% MgO were examined by a three-point bending test. Joint-free bars were also tested as controls. Fracture surfaces were evaluated by scanning electron microscopy. In addition, linear shrinkage and fracture toughness were assessed. The 0.3 mass% MgO group showed the highest flexural strength among the jointed groups, and there were no statistical differences between the joint-free control groups. The fracture surface of 0.3 mass% MgO group showed increased sintering densification with reduced micropore size. No linear shrinkage was observed with the addition of MgO to the alumina slip. Added MgO was also effective in boosting fracture toughness. The present findings indicate that the MgO-supplemented binding material is useful for clinical applications.
journal_name
Dent Mater Jjournal_title
Dental materials journalauthors
Odatsu T,Sawase T,Kamada K,Taira Y,Shiraishi T,Atsuta Mdoi
10.4012/dmj.27.251subject
Has Abstractpub_date
2008-03-01 00:00:00pages
251-7issue
2eissn
0287-4547issn
1881-1361journal_volume
27pub_type
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journal_title:Dental materials journal
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journal_title:Dental materials journal
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doi:
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journal_title:Dental materials journal
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