TY - JOUR
T1 - Effects of temperature increase during surgical drilling in acrylic resin
AU - Muramoto, Y.
AU - Fridrici, V.
AU - Kapsa, Ph
AU - Bouvard, G.
AU - Ohta, M.
N1 - Funding Information:
We sincerely thank Dr. Salvia for her technical support on the DMA measurements of acrylic specimens, and Dr. Berthel for his technical support on the temperature measurements and analysis in drilling of acrylic specimens. This work was supported by the JSPS Core-to-Core Program, the ImPACT Program, the Program for Leading Graduate Schools, IFS collaborative research project, and the LABEX MANUTECH-SISE (ANR-10-LABX-0075) of Université de Lyon, within the Program “Investisse-ments d’Avenir” (ANR-11-IDEX-0007) operated by the French National Research Agency. LIA ELyT Global is also acknowledged.
Publisher Copyright:
© 2020-IOS Press and the authors. All rights reserved.
PY - 2020
Y1 - 2020
N2 - 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.
AB - 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.
KW - DMA
KW - Drilling
KW - acrylic resin
KW - cutting chips
KW - torque
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U2 - 10.3233/THC-191870
DO - 10.3233/THC-191870
M3 - Article
C2 - 31796714
AN - SCOPUS:85088848273
VL - 28
SP - 369
EP - 380
JO - Technology and Health Care
JF - Technology and Health Care
SN - 0928-7329
IS - 4
ER -