Effects of temperature increase during surgical drilling in acrylic resin

Y. Muramoto, V. Fridrici, Ph Kapsa, G. Bouvard, M. Ohta

研究成果: Article査読

抄録

BACKGROUND: Acrylic resin is employed for drilling bone biomodels. Since drilling causes temperature rise, the mechanical properties of thermoplastic acrylic resin can be altered, consequently affecting drilling properties. However, it is currently unclear how this temperature increase impacts drilling. OBJECTIVE: This study reports the effects of temperature rise on both mechanical and drilling properties through experiments in which acrylic resin is drilled under machining conditions employed in surgical operations. METHODS: Drilling tests were performed using a surgical drill on medical acrylic resin under dry conditions to observe generated cutting chips and measure drilling properties such as torque, drilling time, and temperature rise. Dynamic mechanical analysis measurements were performed to consider temperature effects. RESULTS: According to the morphological classification of the cutting chips, the drilling process is divided into three phases corresponding with the generation of cylindrical helix, waved, and rounded nubby chips respectively. During drilling, the temperature of the chips can exceed the glass transition temperature (100 C) resulting in decreased viscoelasticity, which is associated with decreased torque. CONCLUSIONS: While drilling acrylic resin under surgical machining conditions, increasing temperature can decrease torque and morphologically change cutting chips due to the decrease in mechanical properties above the glass transition temperature.

本文言語English
ページ(範囲)369-380
ページ数12
ジャーナルTechnology and Health Care
28
4
DOI
出版ステータスPublished - 2020

ASJC Scopus subject areas

  • 生物理学
  • バイオエンジニアリング
  • 情報システム
  • 生体材料
  • 生体医工学
  • 健康情報学

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