Amount of deformation and bactericidal effects of microwave heat treatment of PEEK

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  • Asano Takashi
    Department of Oral Function and Fixed Prosthodontics, Nihon University School of Dentistry at Matsudo
  • Tsuzukibashi Osamu
    Department of Laboratory Medicine and Dentistry for the Compromised Patient, Nihon University School of Dentistry at Matsudo
  • Uchibori Satoshi
    Department of Oral Function and Fixed Prosthodontics, Nihon University School of Dentistry at Matsudo
  • Suzuki Hiroshi
    Department of Oral Function and Fixed Prosthodontics, Nihon University School of Dentistry at Matsudo
  • Wakami Masanobu
    Department of Oral Function and Fixed Prosthodontics, Nihon University School of Dentistry at Matsudo
  • Fukumoto Masahiko
    Department of Laboratory Medicine and Dentistry for the Compromised Patient, Nihon University School of Dentistry at Matsudo
  • Komiyama Osamu
    Department of Oral Function and Fixed Prosthodontics, Nihon University School of Dentistry at Matsudo

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Other Title
  • PEEKのマイクロ波加熱処理による変形量と真菌に対する殺菌効果
  • PEEK ノ マイクロハ カネツ ショリ ニ ヨル ヘンケイリョウ ト シンキン ニ タイスル サッキン コウカ

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Abstract

<p>Purpose: To assess the effects of microwave heating of polyether ether ketone (PEEK) on the amount of deformation and bactericidal effects on Candida albicans (C. albicans), and to investigate the possibility of application as a denture base material.</p><p>Method: 1) PEEK and other test pieces formed from resins for denture bases were subjected to microwave heating and deformation resistance was measured. 2) PEEK bearing C. albicans was subjected to washing with denture cleanser or microwave heating sterilization, and remaining live bacteria were then counted. 3) PEEK bearing a C. albicans biofilm was similarly subjected to washing with denture cleanser or microwave heating sterilization and remaining live bacteria were then counted.</p><p>Results: 1) Deformation of PEEK under microwave heating was negligible, with no apparent effect of repeated heatings, whereas deformation of denture base resins increased with the number of times of heating. 2) The bactericidal rate on PEEK was 99.9% by denture cleanser washing and 100% by microwave heating sterilization. 3) The bactericidal rate in the biofilm formed on PEEK was 99.7% by denture cleanser washing and more than 99.9% by microwave heating sterilization.</p><p>Conclusion: PEEK offers superior deformation and bactericidal effects under microwave heating and holds promise as a material for dentures and other intraoral appliances.</p>

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