Abstract:
OBJECTIVE:To incorporate a metal framework into removable partial dentures, the dimensional accuracy of thermoplastic resins requires precision equivalent to conventional acrylic resins. This study aimed to evaluate the fitting accuracy of thermoplastic resins compared to heat-cured acrylic resin. MATERIALS AND METHODS:Four thermoplastic resins (polyethylene terephthalate [EstheShot, ES; EstheShot Bright, ES-B], polyamide [Lucitone FRS, LF], polycarbonate [Reigning Resin N, RN] and a heat-curing acrylic resin [Acron, AC]) were used. The specimens were created on master casts constructed of high-strength stone that simulated a maxillary edentulous ridge. Additionally, high-expansion stone was used as the master cast for RN specimens. The ES-B, LF and RN specimens were prepared with and without annealing after injection molding. The gaps between the molded resin and the cast were measured. RESULTS:ES had the smallest gap and was significantly smaller than AC (p < 0.05). The gap sizes of ES-B, LF and RN (high-expansion stone) without annealing were similar to AC (p > 0.05), while the gap size of RN (high-strength stone) with and without annealing was significantly greater than AC (p < 0.001). The gap sizes of ES-B and LF with annealing were significantly less than AC (p < 0.05). Further, the gap sizes of ES-B, LF and RN with annealing were significantly smaller than the gaps without annealing (p < 0.05). CONCLUSIONS:The results suggested that ES, ES-B and LF have adequate fitting accuracy for incorporating metal framework into dentures and that annealing effectively improved the fitting accuracy of ES-B, LF and RN.
journal_name
Acta Odontol Scandjournal_title
Acta odontologica Scandinavicaauthors
Wada J,Fueki K,Yatabe M,Takahashi H,Wakabayashi Ndoi
10.3109/00016357.2014.946966subject
Has Abstractpub_date
2015-01-01 00:00:00pages
33-7issue
1eissn
0001-6357issn
1502-3850journal_volume
73pub_type
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journal_title:Acta odontologica Scandinavica
pub_type: 杂志文章
doi:10.3109/00016359309040584
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journal_title:Acta odontologica Scandinavica
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pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:1997-01-01 00:00:00
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更新日期:2017-01-01 00:00:00
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pub_type: 杂志文章,随机对照试验
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更新日期:2014-11-01 00:00:00
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