• 대한골관절종양학회지
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• 제5권1호
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• pp.51-55
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• 1999

Aspirin has usually been taken for pain relief originating in the nidus of osteoid osteoma, however it takes too long to become effective. Because of the protracted painful course and the unpredictability of regression, osteoid osteoma is usually removed. And then, the defective host bone is internally fixed by plate and screws and augumented by autogenous bone graft. However, the common intracortical location and exuberant periosteal reaction hinders the exact intraoperative localization of the nidus. The authors managed 6 patients by computerized tomography-guided percutaneous nidus excision with a relatively small skin incision, small cortical window, short operation time and no bone graft. It may be one of the best options for removal of the nidus of osteoid osteoma with certainty.

• 대한정형외과 초음파학회지
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• 제4권2호
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• pp.84-87
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• 2011

볼크만 구축 환자의 술 전 준비 단계에서 척골 및 요골 동맥에 대한 도플러 초음파 유도 알렌 검사를 시행하여 청각 도플러와 CT-혈관조영술에서는 확인되지 않았던 척골 동맥의 혈류 감소를 인지할 수 있었다. 저자들은 척골 및 요골 동맥에 대한 도플러 초음파 유도 알렌 검사의 유용성에 대한 인식을 높이고자, 그 증례를 문헌고찰과 함께 보고하고자 한다.

• Restorative Dentistry and Endodontics
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• 제45권3호
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• pp.27.1-27.9
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• 2020

Apical surgery for a mandibular molar is still challenging for many reasons. This report describes the applications of computer-guided cortical 'bone-window technique' using piezoelectric saws that prevented any nerve damage in performing endodontic microsurgery of a mandibular molar. A 49-year-old woman presented with gumboil on tooth #36 (previously endodontically treated tooth) and was diagnosed with chronic apical abscess. Periapical lesions were confirmed using cone-beam computed tomography (CBCT). Endodontic microsurgery for the mesial and distal roots of tooth #36 was planned. Following the transfer of data of the CBCT images and the scanned cast to an implant surgical planning program, data from both devices were merged. A surgical stent was designed, on the superimposed three-dimensional model, to guide the preparation of a cortical window on the buccal side of tooth #36. Endodontic microsurgery was performed with a printed surgical template. Minimal osteotomy was required and preservation of the buccal cortical plate rendered this endodontic surgery less traumatic. No postoperative complications such as mental nerve damage were reported. Window technique guided by a computer-aided design/computer-aided manufacture based surgical template can be considerably useful in endodontic microsurgery in complicated cases.

• Asian Pacific Journal of Cancer Prevention
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• 제17권10호
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• pp.4689-4692
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• 2016

Purpose: To study the clinical application value of ultrasound guided thyroid fine needle aspiration biopsy and thinprep cytology testing in diagnosis of thyroid disease. Methods: A total of 78 patients with thyroid nodules were enrolled, 34 males and 44 females, aged 33-64 years old with mean age of 47.6 years. All underwent thyroid module fine needle puncture after surgery to assess cell pathology and histopathological features. Results: Sufficient specimens were obtained from all of 78 patients, the cytological results of 73 cases (93.6 %) being consistent with pathological results. While 20 cases (25.6 %) were malignant tumors, 44 (56.4 %) were benign and 9 (11.5 %) were non-tumor lesions. The sensitivity of benign and malignant thyroid nodule by thyroid fine needle puncture was 90.9 %, specificity was 98.1 % and the positive predictive value was 96.3 %. Conclusions: It is demonstrated that ultrasound-guided thyroid fine needle aspiration biopsy and thinprep cytology testing have diagnostic value in clinical application for thyroid disease,showing good diagnostic coincidence rates with histopathological examination. They can thus be regarded as safe and effective for preoperative diagnosis and providing an appropriate basis for selection of surgery.

• Journal of Computing Science and Engineering
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• 제4권4호
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• pp.368-387
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• 2010

We propose a novel method for the registration of 3D CT scans to 2D endoscopic images during the image-guided medialization laryngoplasty. This study aims to allow the surgeon to find the precise configuration of the implant and place it into the desired location by employing accurate registration methods of the 3D CT data to intra-operative patient and interactive visualization tools for the registered images. In this study, the proposed registration methods enable the surgeon to compare the outcome of the procedure to the pre-planned shape by matching the vocal folds in the CT rendered images to the endoscopic images. The 3D image fusion provides an interactive and intuitive guidance for surgeon by visualizing a combined and correlated relationship of the multiple imaging modalities. The 3D Magic Lens helps to effectively visualize laryngeal anatomical structures by applying different transparencies and transfer functions to the region of interest. The preliminary results of the study demonstrated that the proposed method can be readily extended for image-guided surgery of real patients.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제33권1호
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• pp.66-72
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• 2011

A severely vertical resorbed ridge is a significant challenge in implant dentistry. To solve this problem, several augmentation techniques, such as guided bone regeneration (GBR), onlay bone grafts, distraction osteogenesis, and ridge splitting techniques, have been proposed and used for several years. Among these methods, vertical ridge augmentation using guided bone regeneration aims to build space and guide osteoblasts to this space to promote osteogenesis. The aim of guided bone regeneration is to maintain and stabilize the space and block the proliferation of adjacent soft tissue. In our hospital, we encountered a case of a woman in her forties with an atrophied mandible, who underwent implant surgery in the right mandible. Titanium reinforced Gore-Tex (TRG) was used to augment the mandible and titanium mesh was used in the left mandible. Favorable results were obtained. This report compares the two methods and reviews the relevant literature.

• Journal of Korean Neurosurgical Society
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• 제63권2호
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• pp.237-247
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• 2020

Objective : Fixation of the C1-2 segment is challenging because of the complex anatomy in the region and the need for a high degree of accuracy to avoid complications. Preoperative 3D-computed tomography (CT) scans can help reduce the risk of complications in the vertebral artery, spinal cord, and nerve roots. However, the patient may be susceptible to injury if the patient's anatomy does not match the preoperative CT scans. The intraoperative 3D image-based navigation systems have reduced complications in instrument-assisted techniques due to greater accuracy. This study aimed to compare the radiologic outcomes of C1-2 fusion surgery between intraoperative CT image-guided operation and fluoroscopy-guided operation. Methods : We retrospectively reviewed the radiologic images of 34 patients who underwent C1-2 fusion spine surgery from January 2009 to November 2018 at our hospital. We assessed 17 cases each of degenerative cervical disease and trauma in a study population of 18 males and 16 females. The mean age was 54.8 years. A total of 139 screws were used and the surgical procedures included 68 screws in the C1 lateral mass, 58 screws in C2 pedicle, nine screws in C2 lamina and C2 pars screws, four lateral mass screws in sub-axial level. Of the 34 patients, 19 patients underwent screw insertion using intraoperative mobile CT. Other patients underwent atlantoaxial fusion with a standard fluoroscopy-guided device. Results : A total of 139 screws were correctly positioned. We analyzed the positions of 135 screws except for the four screws that performed the lateral mass screws in C3 vertebra. Minor screw penetration was observed in seven cases (5.2%), and major pedicle screw penetration was observed in three cases (2.2%). In one case, the malposition of a C2 pedicle screw was confirmed, which was subsequently corrected. There were no complications regarding vertebral artery injury or onset of new neurologic deficits. The screw malposition rate was lower (5.3%) in patients who underwent intraoperative CT-based navigation than that for fluoroscopy-guided cases (10.2%). And we confirmed that the operation time can be significantly reduced by surgery using intraoperative O-arm device. Conclusion : Spinal navigation using intraoperative cone-beam CT scans is reliable for posterior fixation in unstable C1-2 pathologies and can be reduced the operative time.

• 대한정형외과 초음파학회지
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• 제2권2호
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• pp.74-78
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• 2009

목적: 견관절에 발생한 석회화 건염에 대해 초음파 감시하 다발성 천공술의 유용성을 알아보고자 하였다. 대상 및 방법: 어깨 통증으로 내원하여 견관절 석회화 건염을 진단받은 환자 중 초음파 감시하에 다발성 천공술을 시행받은 18예를 대상으로 하였고 추시 기간은 평균 17주 였다. 시술은 초음파 감시 하에 침착된 석회에 대한 흡인 혹은 다발성 천공을 시행하였고 인접 점액낭에 국소마취제와 스테로이드를 주입하였다. 임상적 평가는 시술 전과 최종 추시 시의 통증에 대한 시각점수척도(visual analogue scale), UCLA 점수(UCLA score)와 한국견관절 점수(KSS score)를 사용하여 평가하였고, 초음파상 평가는 석회 침착의 크기와 상태를 비교하였다. 결과: 시술 후 통증에 대한 시각척도점수와 UCLA 점수 및 한국견관절 점수는 모두 통계적으로 의미 있게 호전되었고(p<0.05), 침착 된 석회는 39%에서 거의 대부분 혹은 완전하게 소실되었으며, 61%에서는 크기가 감소하였다. 결론: 초음파를 이용한 다발성 천공술은 견관절의 석회화 건염에서 즉각적인 통증 조절과 임상 증상의 회복을 도모할 수 있으며 침착 된 석회를 효과적으로 감소시킬 수 있는 유용한 방법으로 판단된다.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제36권6호
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• pp.239-246
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• 2014

Many kinds of membrane have been used for the guided bone regeneration (GBR) technique. However, most membranes do not fulfill all requirements for the ideal membrane for the GBR technique. Among them, collagen membrane has been most widely used. However, its high price and weak tensile strength in wet condition are limitations for wide clinical application. Synthetic polymers have also been used for the GBR technique. Recently, silk based membrane has been considered as a membrane for the GBR technique. Despite many promising preclinical data for use of a silk membrane, clinical data regarding the silk membrane has been limited. However, silk based material has been used clinically as vessel-tie material and an electrospun silk membrane was applied successfully to patients. No adverse effect related to the silk suture has been reported. Considering that silk membrane can be provided to patients at a cheap price, its clinical application should be encouraged.

• 대한정형외과 초음파학회지
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• 제5권1호
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• pp.36-40
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• 2012

요근 농양은 전통적으로는 수술적 배농술이 많이 시도되고 있으나 초음파 유도하 경피적 천자술이 효과적인 치료방법이 될 수 있다. 그러나 아직까지 초음파를 이용한 천자술의 유용성에 대해서는 잘 확립되어 있지 않다. 저자들은 진균성 요근 농양을 초음파 유도하 경피적 천자술로 치유하였던 증례를 경험하였기에 문헌 고찰과 함께 보고하고자 한다. 배농은 초음파 영상 하에서 침 천자술로써, 시술로 인한 합병증의 발생 없이 시행하였다. 배농 후 배양에서 Candida Albicans가 동정되었으며 두 번의 천자술과 적절한 항진균제 치료로써 성공적으로 치유할 수 있었다.