CAJ | 학술논문

针对现有全锆牙在制作过程中存在二次烧结、收缩精度难以控制等问题，提出了采用超声振动辅助磨削完全烧结氧化锆陶瓷牙冠的方法。从理论分析的角度对其运动学特性进行了研究，并通过超声振动辅助磨削和普通金刚石磨削实验，对该方法的可行性进行了分析。结合牙冠的加工特点，重点研究了主轴转速对材料去除率、表面粗糙度以及最大边缘碎裂的影响规律。实验结果表明，超声振动辅助磨削不仅能提升材料的去除率，有效抑制出口边缘碎裂，同时降低了工件表面的粗糙度，是实现完全烧结氧化锆陶瓷牙冠高效低损伤加工的新方法。
침대현유전고아재제작과정중존재이차소결、수축정도난이공제등문제，제출료채용초성진동보조마삭완전소결양화고도자아관적방법。종이론분석적각도대기운동학특성진행료연구，병통과초성진동보조마삭화보통금강석마삭실험，대해방법적가행성진행료분석。결합아관적가공특점，중점연구료주축전속대재료거제솔、표면조조도이급최대변연쇄렬적영향규률。실험결과표명，초성진동보조마삭불부능제승재료적거제솔，유효억제출구변연쇄렬，동시강저료공건표면적조조도，시실현완전소결양화고도자아관고효저손상가공적신방법。
Aiming at machining problems of zirconia ceramics dental prosthesis,such as,complexly processing, difficult to control shrinkage and so on,a new method using ultrasonic vibration assisted grinding presintered zirconia ceramics crowns was proposed.Firstly,its macro kinematic characteristics were investigated with theoretical analysis. Then,tests for machining presintered zirconia ceramics with ultrasonic vibration assisted grinding and diamond grinding were conducted to analyze the feasibility of the new method.Effects of spindle speed on material removal rate,surface roughness and edge chipping size were studied,combined with the machining characteristics of dental prosthesis.The test results demonstrated that the ultrasonic vibration assisted grinding not only raises the material removal rate,but also reduces the surface roughness and restrains the edge chipping effectively,therefore,the ultrasonic vibration assisted grinding is a new method with higher efficiency and lower damage for machining presintered zirconia ceramics crowns.