• Clinics in Shoulder and Elbow
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• 제24권2호
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• pp.110-113
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• 2021

We present an unusual case of bone metastases from renal cell carcinoma around orthopedic implants in a 78-year-old female with osteolytic, expansile, highly vascularized, malignant infiltration around suture anchors in the proximal humerus. The patient had undergone arthroscopic rotator cuff repair using suture anchor implants 6 years previously. After diagnosis of bone metastasis, she was successfully treated with metastasectomy and internal fixation using a plate and screws, with cement augmentation. This report is the first to document metastases around a suture anchor in a bone and suggests the vulnerability of suture anchor implants to tumor metastasis.

• Imaging Science in Dentistry
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• 제51권1호
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• pp.87-90
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• 2021

The increased use of cone-beam computed tomographic (CBCT) scans has made it increasingly necessary to evaluate incidental findings on CBCT scans. This report describes the case of a 66-year-old female patient who presented to the Department of Oral and Maxillofacial Pathology, Radiology and Medicine at the College of Dentistry of the author's institution and underwent a CBCT scan for maxillary alveolar process implant planning. Upon evaluation of the CBCT scan, a radiopaque (soft tissue attenuation) mass in the left superior aspect of the nasal cavity and left locule of the sphenoid sinus with opacification of the left locule of the sphenoid sinus was incidentally noted. These radiographic findings were suggestive of a space-occupying mass with a high possibility of malignancy. A further medical evaluation confirmed renal cell cancer metastasis to the sphenoid sinus. This study shows the significance of reviewing the entire CBCT scan for incidental findings.

• Journal of Korean Dental Science
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• 제15권1호
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• pp.92-99
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• 2022

This case report describes the immediate loading of narrow diameter implants in the mandibular incisor area using full-digital flow. The 3-dimensional position of the implants was planned using digital software, and the corresponding surgical template was fabricated. The implants were inserted immediately after extraction and on the same day, the interim abutment and bridge were placed. At 8 weeks after surgery, the stability of the implants was measured and a digital impression was made using a scan body. Customized titanium abutments and a cement-type full zirconia bridge were delivered. At 36 weeks' follow-up, no clinical or radiographic complications were detected, and the patient was satisfied with the results.

• Archives of Plastic Surgery
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• 제49권5호
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• pp.604-607
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• 2022

Nontuberculous mycobacterial hardware infections are extremely challenging to treat. Multidisciplinary care involving removal of infected hardware, thorough debridement, and durable soft tissue coverage in conjunction with antibiotic therapy is essential for successful management. This case report presents a patient with chronic mycobacterial spinal hardware infection that underwent successful treatment with aggressive serial debridements and reconstruction with a large pedicled superior gluteal artery perforator flap coverage.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송∙미디어공학회 2020년도 추계학술대회
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• pp.305-308
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• 2020

임플란트 시술 수요가 늘고 시장이 성장하면서 관련 기술도 발전하고 있다. 특히 기능성과 심미성 향상을 위해 많은 기술이 연구되고 있다. 이 중 심미성에 있어 주변 치아와의 색 유사도가 높은 임플란트를 제작하는 것이 주요 연구 중 하나이다. 본 논문에서는 심미성 높은 임플란트 제작을 위해, 다음과 같은 임플란트 표본 추천 시스템을 제안한다. 휴대 조명 장치와 의료용 치아 패치를 사용한 색 보정으로 촬영 환경 차이를 최소화하여 치아의 정확한 색을 추출한다. Mask R-CNN 모델을 통해 보정된 영상에서 치아를 검출하고, 군집화를 통해 색상 단위로 치아 영역을 구분한다. 치아의 영역별 색상과 임플란트 표본 사이의 색상 거리를 계산하여 유사한 표본들을 추천한다. 위 시스템을 통해 사용자는 주변 환경에 영향을 받지 않고, 치아의 색을 정확히 분석하여 이를 임플란트 표본과 비교할 수 있게 된다.

• Imaging Science in Dentistry
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• 제54권1호
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• pp.105-107
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• 2024

The author herein presents an unusual case of eustachian tube calcification masquerading as loose radiopacities in the temporomandibular joints on a panoramic image, creating a diagnostic challenge. The patient, a 72-year-old woman, presented to the dental service for implant treatment to improve her masticatory function. A cone-beam computed tomography scan was performed and reviewed by a board-certified oral and maxillofacial radiologist. The scan showed no evidence of calcifications in the temporomandibular joints; however, it revealed nodular calcifications within the cartilaginous portion of the eustachian tube bilaterally. Additionally, this report briefly reviews the differential diagnosis of calcified loose bodies in the temporomandibular joint and provides information that needs to be reinforced periodically.

• Archives of Plastic Surgery
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• 제51권2호
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• pp.150-155
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• 2024

The superficial circumflex iliac artery perforator (SCIP) flap is a versatile flap that has been described for various applications, mostly for lower extremity coverage and head and neck reconstructions. However, there are few publications reporting its use for breast reconstruction, mainly because of its low volume availability. In this article, we present the case of a patient who successfully underwent a partial breast and immediate nipple-areola complex (NAC) reconstruction with an SCIP flap. She had been previously reconstructed with an implant after a nipple-sparing mastectomy, but the NAC turned out to be involved with cancer needing further resection. Our goal with this article, is to introduce a novel concept for addressing partial breast and NAC reconstruction and mostly, to illustrate the importance of an adaptable surgical plan based on every individual case emphasizing the versality of microsurgery for breast cancer reconstruction.

• 대한장애인치과학회지
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• 제13권2호
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• pp.95-98
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• 2017

본 증례는 다운 증후군이 있는 환자의 구강 재건 시 CAD/CAM 시스템 사용의 이점을 모색해보았다. 다운 증후군 환자들의 경우, 보철물 파절의 위험성이 크며 불가피하게 보철물을 재제작할 경우, CAD/CAM 시스템의 기존 데이터를 이용하여 최소한의 기공 과정만 진행하여 보철물을 빠른 시일 내에 재제작할 수 있다. 결과적으로 이는 심미적 및 기능적 개선을 통해 삶의 질을 높일 수 있는 보철물 제작 시 환자의 불편감과 치과의사의 노력을 최소화하는 방법이다.

• 대한치과보철학회지
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• 제61권4호
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• pp.293-307
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• 2023

최근 다양한 증례 보고에서 소개되고 있는 jaw motion tracking은 환자의 안궁 이전 및 개별화된 하악 운동 경로를 기록한 후, 이를 computer-aided-design/computer-aided-manufacturing (CAD-CAM) 소프트웨어의 가상공간상에 재현하는 방법이다. 본 증례의 환자는 오랜 기간 구치부의 상실로 인해 교합평면의 붕괴가 관찰되었기에, 수직 교합 고경의 증가를 동반한 완전 구강 회복술을 계획하였다. 우선 jaw motion tracking을 진행하여 새로운 중심위 상에서 환자의 하악 운동을 기록한 후, 이 정보를 환자의 초진 구내 데이터 및 3차원 안면 스캔 데이터와 조합하여 가상 환자를 생성하였다. 가상 환자 상에서 진행한 디지털 왁스업과 임플란트 식립 계획을 바탕으로 임시 보철물을 제작하였다. 새롭게 설정된 수직 교합 고경 상에서 적절한 견치 유도를 보이는 임시 보철물의 검증을 통해, 최종 보철물로 이행하였다. 이처럼 디지털 치의학 기술의 장점을 활용하여 환자는 저작능과 심미성의 개선에 만족하였기에 본 증례를 보고하고자 한다.

• 한국멀티미디어학회논문지
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• 제19권2호
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• pp.375-385
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• 2016

Recently, several implantable hearing aids such as cochlear implant, middle ear implant, etc., which have a module receiving power and signal from outside the body, are frequently used to treat the hearing impaired patients. Most of implantable hearing aids are adopted permanent magnet pairs to couple between internal and external devices for the enhancement of power transmission. Generally, the internal device which containing the magnet in the center of receiving coil is implanted under the skin of human temporal bone. In case of MRI scanning of a patient with the implantable hearing aid, however, homogeneous magnetic fields of the MRI might be interfered by the implanted magnet. For the above reasons, the MR image is degraded by large area of artifact, so that diagnostics are almost impossible in deteriorated region. In this paper, we proposed an external coil system that can reduce the artifact of MR image due to the internal coupling magnet. By finite element analysis estimating area of MR artifact according to varying current and shape of the external coil, optimal coil parameters were extracted. Finally, the effectiveness of the proposed external coil system was verified by confirming the artifact at real MRI scan.