Endoscope-assisted Removal of Dental Implants Displaced Into the Maxillary Sinus: A Report of 27 Patients

안강민 대한구강악안면임플란트학회 2023 대한구강악안면임프란트학회지 Vol.27 No.3

Purpose: Dental implant displacement into the maxillary sinus can be performed intraoperatively, during the healing phase and after loading. We aimed to describe the etiology, sequela, and treatment in each stage by presenting 27 sinus migration cases. Conclusion: Implant displacement was predominant during the healing period and for the osteotome technique. Unnoticed membrane perforation during implant placement in the posterior maxilla may cause dental implant displacement into the maxillary sinus. Osteotome sinus floor elevation should be utilized carefully to prevent implant migration. The lateral approach with endoscope visualization facilitated displaced implant removal.

정상 연하와 관련된 해부학 및 생리

안강민 대한연하장애학회 2011 대한연하장애학회지 Vol.1 No.1

Normal swallowing occurs so smoothly that the process is often misbelieved as a very simple sequence. However, swallowing consists of volitional and reflective activities which included more than 30 cranial nerves and muscles. The harmony and orchestration of swallowing is so well organized and occurs more than 2,400 times a day. In this article, normal anatomy including oral cavity, pharynx, esophagus, muscles and cranial nerves were reviewed. And the major four steps of swallowing such as oral preparatory phase, oral phase, pharyngeal phase and esophageal phase are analyzed.

2004년 베트남 구순구개열 무료수술 및 10주년 봉사 활동에 관한 보고

안강민,유순용,최진영,김종렬,김명진,오용석,Tri,민병일 대한구순구개열학회 2004 대한구순구개열학회지 Vol.7 No.2

심하게 퇴축된 하악구치부 임플란트를 위한 온레이 블록형 골이식

안강민 대한치과의사협회 2023 대한치과의사협회지 Vol.61 No.9

Onlay block bone graft for vertical augmentation is quite difficult and has been performed by only oral and maxillofacial specialists. In specific situation such as severely resorbed posterior mandible, there is no other choice for implant surgery except block bone graft. Onlay block bone graft for dental implant in the severely resorbed posterior mandible could be achieved when the principles of block bone graft are carefully attained. In this article, principles for onlay block bone graft with surgical procedure were described.

[특강] 연하장애(Dysphagia)란?

안강민 Asia association of Disability and Oral health 2012 대한장애인치과학회지 Vol.8 No.2

LIME을 활용한 준지도 학습 기반 이상 탐지 모델: 반도체 공정을 중심으로

안강민,신주은,백동현 한국산업경영시스템학회 2022 한국산업경영시스템학회지 Vol.45 No.4

Recently, many studies have been conducted to improve quality by applying machine learning models to semiconductor manu- facturing process data. However, in the semiconductor manufacturing process, the ratio of good products is much higher than that of defective products, so the problem of data imbalance is serious in terms of machine learning. In addition, since the number of features of data used in machine learning is very large, it is very important to perform machine learning by extracting only important features from among them to increase accuracy and utilization. This study proposes an anomaly detection method- ology that can learn excellently despite data imbalance and high-dimensional characteristics of semiconductor process data. The anomaly detection methodology applies the LIME algorithm after applying the SMOTE method and the RFECV method. The proposed methodology analyzes the classification result of the anomaly classification model, detects the cause of the anomaly, and derives a semiconductor process requiring action. The proposed methodology confirmed applicability and feasibility through application of cases.

양막과 콜라겐을 이용한 생체 적합 드레싱 소재 개발 및 백서 창상치유 실험

안강민(Kang-Min Ahn),이지호(Ji-Ho Lee),이의룡(Ui-Lyong Lee),이종호(Jong-Ho Lee),이종원(Jong-Won Lee),김성포(Sung-Po Kim),양은경(Eun-Kyung Yang),김기호(Ki-Ho Kim) 대한구강악안면외과학회 2006 대한구강악안면외과학회지 Vol.32 No.3

Purpose of study: Partial thickness skin graft is the golden standard regimen for full-thickness skin defect caused by burn or trauma. However, in case of extensive burns of more than 50% of total body surface area, the donor site is not sufficient to cover all defects. As a second choice, allograft, xenograft and synthetic materials have been used to treat skin defect. Among them the amniotic membrane(AM) was used as a biological dressing for centuries because of its potential for wound healing. In this study, quantification of EGF in AM and effect of AM-collagen complex on full thickness skin defects was examined. Materials & Methods: The concentration of EGF in fresh, deep frozen and freeze-dried AM was evaluated by ELISA. EGF-R immunostaining was performed in freeze-dried AM. SD rats weighing 250~300g was used for wound healing experiment. Three full thickness skin defects(28mm diameter) were made on dorsal surface of SD rat. The control group was covered by Vaselin gauze and AM-collagen complex and Terudermis was grafted in two other defects. Healing area, Cinamon’s score were evaluated before biopsy. Grafted sites were retrieved at 3 days, 1 week, 2 weeks and 4 weeks after operation. H & E and Factor VIII immunohistochemical stain was performed to evaluate the microscopic adhesion and structural integrity and microvessel formation. Results: 1. EGF concentration of fresh, deep frozen and freeze-dried AM showed similar level and EGF-R was stained in epithelial layer of freeze-dried AM. 2. At 4 weeks after grafting, the healing area of AM-collagen and Terudermis group was 99.29±0.71% and 99.19±0.77 of original size. However, that of control group was 24.88±2.90. 3. The Cinamon’s score of AM-Collagen and Terudermis group at 4 weeks was 15.6±1.26 and 14.6±3.13 and that of control group was 3.7±0.95. Significant difference was observed among control and experimental groups(p〈0.05). 4. Histologic examination revealed that AM protected leukocyte infiltration and epithelial migration was nearly completed at 4 weeks. Terudermis group showed mild neutrophil infiltration until 2 weeks and completion of epithelization at 4 weeks. Control group showed massive leukocyte infiltration until 4 weeks. 5. Microvessels were increased sharply at 1 week and control group at 1 and 4 week showed significant differences with Terudermis group of same interval(p〈0.05) but no differences were found with AM group(p〈0.05). Conclusion: EGF and EGF-R were well preserved in freeze-dried AM. AM attached to collagen acted as excellent biologic dressing which had similar effect with Terudermis. AM showed anti-inflammatory action and healing was completed at 4 weeks after full-thickness skin defect.

심미-기능적인 구강암 수술과 재건

안강민(Kang-Min Ahn) 대한치과의사협회 2014 대한치과의사협회지 Vol.52 No.10

Oral cancer ablation surgery results in tissue defects with functional loss. Accompanying neck dissection results in facial nerve weakness and dysmorphic changes. To minimize the complications after oral cancer surgery, accurate dissection without damaging facial nerve and vital structures are mandatory. Marginal mandibular branch of facial nerve should be dissected or contained in the superficial layer of deep cervical fascia to minimized facial palsy after operation. Reconstruction after cancer ablations is routine procedures and free flap reconstruction is the most commonly used. Radial forearm free flap is the most versatile flap to reconstruct soft tissue defects and it is easy to design according to the defect size and shape. However, donor site scar and secondary skin graft from thigh result in unesthetic and cumbersome wounds. Double layered collagen graft in the donor site could reduce secondary donor site for skin graft. In conclusion, oral and maxillofacial surgeon should know the exact anatomy of the face and neck during neck dissection. Radial forearm free flap is most versatile flap for soft tissue reconstruction and double collagen graft can reduce postoperative scar and there is no need for secondary skin graft.

비골 피판을 이용한 하악 및 하악과두 재건의 장기간 임상적 평가

안강민(Kang-Min Ahn),정헌종(Hun-Jong Chung),염학렬(Hak-Ryol Ryom),김항진(Hang-Jin Kim),김윤태(Yoon-Tae Kim),황순정(Soon-Jung Hwang),명훈(Hoon-Myoung),김명진(Myung-Jin Kim),김성민(Soung-Min Kim),장정원(Jeongwon Jahng),이종호(Jong-Ho 대한구강악안면외과학회 2005 대한구강악안면외과학회지 Vol.31 No.5

Purpose of study: The temporomandibular joint (TMJ) occupies a key functional role in mastication and contributes to normal deglutition, speech as well as cosmesis. When a large amount of mandible including the condyle head is resected, it is very difficult to reconstruct it as a functional unit. In this retrospective study, we present the functional, radiographic and cosmetic results of reconstructed temporomandibular joint using free fibular flap. Patients and Methods: Total 12 patients (M:F = 6:6) who underwent condylar reconstruction with the fibular flap were interviewed and examined by radiographs and Bio-PAK. Mean follow up periods was 47.7±20.0 months and the average age was 38.7±15.3 years. Remodeling of condyle and function of TMJ were evaluated and facial contour was judged subjectively. Results: All flaps were viable and no immediate postoperative complication had happened. One patient showed decreased mouth opening, so interpositional gap arthroplasty was performed. The resorption rates of reconstructed fibular were minimal and the condyle heads were changed into domeshaped neocondyle after 2 years. All patients had normal diet and no speech difficulty was reported. Nine patients were satisfied with their facial contour but three patients complained about the depression of cheek. Conclusion: The reconstruction of TMJ with free fibular flap was reliable methods and very effective means of restoring mandibular function. The functional and morphologic results were excellent and showed little complications.

기능별 뼈이식재의 임프란트 적용방법

안강민(Kang-Min Ahn) 대한치과의사협회 2010 대한치과의사협회지 Vol.48 No.4

Dental implant restoration in partial or full edentulous state has become the standard treatment in recent years. Bone graft with guided bone regeneration technique has been regarded as one of the most reliable methods to restore the bone defect area due to periodontal disease or dental trauma. Bone graft materials and membrane are the essential component of guided bone regeneration; however, a variety of bone graft materials confuse us in implant dentistry. Autogenous bone is the recognized standards in implant dentistry owing to its osteogenesis potential. Despite of its disadvantages, grafting autogenous bone is the most reliable methods. Even though the development of new bone grafts materials, autogenous bone is useful in exposed implant thread and total lack of buccal or lingual bone. Allogenic, xenogenic and synthetic bone have the osteoconductive and osteoinductive potential. These materials could be used successfully in self-contained cavity such as sinus cavity and three-wall defects. In this article, application of bone graft material is suggested according to the function of bone graft materials.