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Toshitaka Kaketa
Iwate Medical Univ., School of Dent., Dept. of Prosthetic Dentistry
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Keiichi Koiwa
Iwate Medical Univ., School of Dent., Dept. of Prosthetic Dentistry
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Takeshi Nakajma
Iwate Medical Univ., School of Dent., Dept. of Prosthetic Dentistry
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Ryuji Miyagi
Iwate Medical Univ., School of Dent., Dept. of Prosthetic Dentistry