Integrating a novel ZrO2 based end mill insert to evaluate thermal necrosis and bone surface roughness

Autor: Addepalli, Phanindra, Sawangsri, Worapong, Ghani, Saiful Anwar Che, Yusoff, Ahmed Razlan
Zdroj: Emergent Materials; 20240101, Issue: Preprints p1-16, 16p
Abstrakt: Orthopaedic surgeries subject bones to mechanical and thermal stresses, impacting their structural integrity and healing potential. This study examines the thermal and surface integrity impacts of APMT 1135 modelled SS316L and biocompatible ceramic (ZrO2) milling inserts during bone milling. Thermal stresses in orthopaedic surgeries can induce thermal necrosis, which is detrimental to bone healing. Temperature profiles (Tmaxand Tmean) were assessed, revealing ZrO2’s peak temperature of 39.25 °C at f = 0.03 mm/tooth and s = 900 rpm. ZrO2’s lower thermal conductivity resulted in reduced Tmean, critical for extended tool-bone contact. Surface roughness (Raand Rz) analyses showed ZrO2generally achieving smoother surfaces than SS316L, except under specific conditions. These findings suggest ZrO2as a viable alternative for enhancing bone-implant interfaces and surgical outcomes in orthopaedics, emphasizing the importance of selecting optimal tool materials and machining parameters to improve bone surface quality, implant fixation, and healing times.
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