With the increasing application of mechanical engineering in medical areas, bone drilling
has become one essential part of orthopedic surgery. Recently, there are more and more researches
and developments on bone drilling for fixing implants or widening operative field and related equipments.
However, the uncontrollable axial force and over high drilling temperature during bone drilling
not only influence drilling quality and loose the prosthesis implants, but also are easy to cause fracture
nonunion and various operative complications, thus prolonging the recovery time. All existing drilling
equipments employ manual feed and depend to a greater extent on the experiences of doctors. Doctors could judge whether
bone has been drilled through precise judgment. Excessive feeding because of lack of clinical experiences or misjudgment
during operation will cause secondary injuries to patients. Therefore, the author designed a surgical bone drill with controllable
axial force. It uses abrasive particle drill, brazed PCBN superhard material drill, step drill and brazed twist drill. It could
judge whether the bone has been cut through according to voltage signal collected by the intelligent integrated control system
and thereby stop feeding automatically. Moreover, a theoretical analysis and experimental research on influencing factors of
drilling temperature have been conducted to provide references for clinical practice. This paper analyzed advances and patents
about medical surgical operation bone drilling equipment in recent years, including cranial drills, bone drills with drillings
cleaner, drilling depth adjustable bone drills, automatic stop bone drills and other bone drills.
Keywords: Automatic stop bone drills, bone drills, bone drills with drillings cleaner, cranial drills, drilling depth adjustable
bone drills, drilling temperature, secondary injuries, uncontrollable axial force.
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