1. Clinical application of removable partial dentures using thermoplastic resin—Part I: Definition and indication of non-metal clasp dentures 
Kenji Fueki, DDS, PhD, Chikahiro Ohkubo, DMD, PhD, Masaru Yatabe, DDS, PhD, Ichiro Arakawa, DDS, PhD, Masahiro Arita, DDS, PhD, Satoshi Ino, DDS, PhD, Toshikazu Kanamori, DDS, PhD, Yasuhiko Kawai, DDS, PhD, Misao Kawara, DDS, PhD, Osamu Komiyama, DDS, PhD, Tetsuya Suzuki, DDS, PhD, Kazuhiro Nagata, DDS, PhD, Maki Hosoki, DDS, PhD, Shin-ichi Masumi, DDS, PhD, Mutsuo Yamauchi, DDS, PhD, Hideki Aita, DDS, PhD, Takahiro Ono, DDS, PhD, Hisatomo Kondo, DDS, PhD, Katsushi Tamaki, DDS, PhD, Yoshizo Matsuka, DDS, PhD, Hiroaki Tsukasaki, DDS, PhD, Masanori Fujisawa, DDS, PhD, Kazuyoshi Baba, DDS, PhD, Kiyoshi Koyano, DDS, PhD, Hirofumi Yatani, DDS, PhD 
Journal of Prosthodontic Research 
Volume 58, Issue 1, Pages 3-10 (January 2014)
DOI: /j.jpor
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2. Fig. 1 A non-metal clasp denture without metal elements.
Journal of Prosthodontic Research  , 3-10DOI: ( /j.jpor )
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3. Fig. 2 A non-metal clasp denture with metal rests.
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4. Fig. 3
A non-metal clasp denture with a framework (Reigning N®). (a) Basal surface of the denture; (b) metal rest and resin clasp.
Journal of Prosthodontic Research  , 3-10DOI: ( /j.jpor )
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5. Fig. 4
A non-metal clasp denture using different denture base resins for retentive elements and a denture base. (a) Resin clasp on working cast; (b) delivered denture.
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6. Fig. 5
A non-metal clasp denture without metal framework replacing missing maxillary bilateral frontal teeth (Valplast®). (a) Labial view on working cast; (b) palatal view on working cast.
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7. Fig. 6
Deterioration of thermoplastic resin used for non-metal clasp denture. Polished surface of the maxillary complete denture (left) was good, however surface of denture base of a mandibular non-metal clasp denture (EstheShot®) has become roughened after a year and 6-month use. Denture base of the posterior area was repaired using a cold-cured resin (indicated with arrow).
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8. Fig. 7
Deterioration of thermoplastic resin used for non-metal clasp dentures. (a) Loss of burnish on polished surface (Valplast®); (b) discoloration and decolorization of thermoplastic resin (Lucitone FRS®).
Journal of Prosthodontic Research  , 3-10DOI: ( /j.jpor )
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