• 한국기계가공학회지
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• 제15권3호
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• pp.102-108
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• 2016

A dental ultrasonic surgical instrument, commercially known as a scaler, is a high-value-added advanced technology that is used for tartar removal, implant operations, and gum and jaw bone surgery. In this study, the piezoelectric phenomenon for making linear motion associated with input electrical signals was studied, and the behavior of the ultrasonic vibrator was investigated by using the commercially available finite element program ANSYS(R) for the purpose of designing dental surgery tools. Modal analysis was carried out, and the optimal frequency range was calculated from the analyzed results. The ultrasonic vibrator was then redesigned based on the calculated optimal frequency range. The performance of the system was tested, and consequently, the proposed methodology was proven useful in vibrator design.

• 한국기계가공학회지
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• 제15권1호
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• pp.1-7
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• 2016

In the dentistry field, an ultrasonic surgery unit is widely used in bone cutting and scaling to reduce operation time and minimize hemorrhage. The purpose of this study was to evaluate bone cutting and the effect of a specimen's temperature on the two-type ultrasonic surgery unit using a handpiece moving system(HMS). A HMS, which can cut the bone, was developed to perform the experimental procedure with precision of motion control. Bone specimens were prepared from a combination of epoxy-hardener and cortical bone of bovine leg. Through the bone-cutting experiment, the cutting depth was evaluated by not only scanning electron microscopy, but also Vernier calipers. Also, the temperature distribution was measured by a thermo-graphic camera. This study may be applied methodically in various experimental evaluations on a performance test by a HMS.

• 한국기계가공학회지
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• 제19권2호
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• pp.1-8
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• 2020

While dental clinics still use the ultrasonic scaling/surgery tool for teeth scaling and cleaning the tool's use is expanding steadily to include treatment of damaged teeth and bone tissue. In this study, a handpiece moving system (HMS) was developed to evaluate bone scaling and cutting in the field of dentistry. The HMS, through a scaling test of bone using a scaler tip, it was able to identify surface damage. Additionally, a thermos-graphic camera was used to observe the temperature distribution that occurred during the bone scaling and cutting process. Consequently, we found that increasing the working load increased the amount of surface damage. Changes in temperature distribution occurred slowly and were maintained within safety bounds for 10 minutes. Going forward, we will compare the HMS performance on scaling and cutting with other devices.

• 한국정밀공학회지
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• 제33권5호
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• pp.377-383
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• 2016

Recently, research on bone fracture and osteoplasty using ultrasonic bone surgery unit has been ongoing in the fields of dentistry, plastic surgery, and otorhinolaryngology. However, detailed data evaluation with ultrasonic bone surgery unit has not been conducted to date. In this study, we developed handpiece moving system (HMS) for cutting performance evaluation. In the experimental setup of HMS, a handpiece was immobilized, and bone samples from cortical bone of bovine leg were prepared. Also, the experimental process was described in detail, and a basic experiment was carried out to evaluate the cutting performance. Future study is required on all experimental process conditions by HMS.

• 대한기계학회논문집A
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• 제41권1호
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• pp.13-19
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• 2017

치과 분야에서 초음파를 이용한 수술기 및 스케일러의 사용은 꾸준하게 증가하고 있다. 이때 개발된 기기의 성능 및 안정성은 시술 받는 환자에게 결정적인 요소로 작용하기 때문에 상업화 전에 반드시 시험 평가되어야 한다. 그래서 골 절단 및 치아 스케일링 평가를 수행할 수 있는 핸드피스 이송 시스템을 자체 개발하여 사용하였다. 본 연구의 목표는 초음파 스케일러 팁을 이용하여 치아 손상 정도를 평가하기 위함이다. 추가적으로 초음파 기기의 열 발생 및 소음에 대한 측정을 수행해보았다. 결과적으로 Ultrasonic NX 기기의 높은 출력은 실험을 통한 치아에 심각한 손상을 입힐 수 있지만 열 화상 카메라를 이용한 열 발생 및 소음 측정을 통해 안정적인 범위에 있었다.

• 대한정형외과학회지
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• 제55권5호
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• pp.359-365
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• 2020

소아 고관절 이형성증은 비구 또는 근위 대퇴골, 혹은 양쪽 모두를 포함하는 고관절의 부적절한 발달을 지칭하는 광범위한 개념이다. 초음파적 검사로 영아기의 고관절 탈구 진단이 간과되거나 수술적인 치료가 필요한 경우는 감소하고 있으나 모든 고관절 이형성증을 찾아내지는 못하고 있다. 아탈구가 없는 고관절 이형성증은 우연히 진단되며, 40대 이후 여자에서 퇴행성 관절염과 강한 연관성을 가진다. 아탈구를 동반한 고관절 이형성증은 아탈구의 정도에 따라 증상이 다양한 시기에 걸쳐 나타나며, 특히 여성에서 임신 중 발현되는 경우가 많다. 신생아에 대한 정확한 이학적 검사와 조기 치료는 이 질환의 양호한 결과를 위해 매우 중요하다. 진단의 간과를 막고 조기 치료의 기회를 제공하기 위해 저자는 고관절 이형성증이 의심스러운 2세 이하 영아 모두에게 고관절 검사를 추천한다. 본 연구에서는 고관절 이형성증의 진단 및 초기 치료에 대해 고찰해 보고자 한다.