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Minoru Ai
1st. Dept. of Prosthetic Dentistry, School of Dentistry, Tokyo Medical and Dental University
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Ryoichi Furuya
2nd Dept. of Prosthetic Dentistry, School of Dentistry, Tokyo Medical and Dental University
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Ikumi Shiozawa
2nd Dept. of Prosthetic Dentistry, School of Dentistry, Tokyo Medical and Dental University
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Mitsuaki Yahagi
Dental Laboratory, University Dental, Hospital Tokyo Medical and Dental University