자가치아골이식재를 이용한 발치창 보존 및 재건술

김영균,김수관,김경욱,엄인웅,Kim, Young-Kyun,Kim, Su-Gwan,Kim, Kyung-Wook,Um, In-Woong 대한악안면성형재건외과학회 2011 Maxillofacial Plastic Reconstructive Surgery Vol.33 No.3

An extraction socket was preserved and reconstructed using an autogenous tooth bone graft powder and block in two patients. The grafted site was healed 3 to 3.5 months after surgery. Implant treatment was successfully completed.

폐쇄성수면무호흡증 환자의 하악전방이동장치 적용에 있어서 전방이동량이 미치는 영향

김영균,윤인영,김정훈,이철희,윤필영,Kim, Young-Kyun,Yoon, In-Young,Kim, Jeong-Whun,Lee, Chul-Hee,Yun, Pil-Young 대한수면의학회 2011 수면·정신생리 Vol.18 No.1

목 적: 본 연구의 목적은 폐쇄성수면무호흡증으로 하악 전방이동장치 치료를 시행한 환자들에게 하악전방이동장치의 유용성을 확인하고, 하악전방이동창치 치료시 하악의 전방이동량이 미치는 영향을 평가하고자 하였다. 방 법: 2007년 1월부터 2009년 2월까지 코골이 및 수면무호흡을 주소로 분당서울대학교병원에 내원하여 야간수면다원검사를 통해 폐쇄성수면무호흡증으로 진단받은 환자 중에서, 치료법으로 하악전방이동장치를 선택한 총 86명의 환자를 후향적으로 평가하였다. 임상기록과 수면다원검사를 포함한 모든 환자의 자료를 검토 및 분석하였다. 결 과: 총 86명의 환자 중 65명(75.6%)에게서 성공적인 결과를 얻었다. 경과관찰 기간 중에 28명의 환자에게서 경미한 전치부와 턱관절의 불편감이 보고되었으며, 특히 하악의 전방이동량에 따른 불편감은 7.0 mm 이상의 환자에게서 두드러지게 보고되었다. 하악의 전방이동량과 임상 결과와는 직접적인 관련은 없었다. 결 론: 중증도와 상관없이 하악전방이동장치는 폐쇄성 수면무호흡증 환자의 효과적인 치료방법의 하나로 선택될 수 있다. 잠재적인 치과적인 부작용을 방지하기 위하여 하악전방이동장치의 치료시에 하악의 전방이동량을 우선적으로 고려하여야 할 것이다. Objectives: The purposes of this study were to estimate the effect of mandibular advancement device (MAD) and to evaluate the influence of the advancement amount of mandible in the application of MAD for obstructive sleep apnea (OSA) patients. Methods: From the patients who were diagnosed as OSA by polysomnographic study at Seoul National University Bundang Hospital from January 2007 to February 2009, the patients who chose MAD as treatment option were included in this study. All the patients’ data including clinical records and polysomnographic studies (both pre- and post-treatment) were reviewed and analyzed. Results: Successful results were obtained in 65 patients of 86 patients (75.6%). In the follow-up period, mild discomfort of anterior teeth or temporomandibular joint (TMJ) were described in 28 patients, especially in the cases the amount of mandibular advancement were more than 7.0 mm. There was no direct relationship between the amount of mandibular advancement and clinical outcome. Conclusion: MAD was effective treatment option for the OSA patients regardless of severity. For the prevention of potential dental complications, the amount of mandibular advancement should be considered at the time of MAD treatment.

다양한 이종치아 골이식재를 이용한 두개골 결손부 수복: 동물 연구

김영균,김종화,황지연,엄인웅,정동준,윤필영,Kim, Young-Kyun,Kim, Jong-Hwa,Hwang, Ji-Yeon,Um, In-Woong,Jeong, Dongjun,Yun, Pil-Young 대한악안면성형재건외과학회 2012 Maxillofacial Plastic Reconstructive Surgery Vol.34 No.5

Purpose: The purpose of this study was to evaluate the histological healing process of 3 different types of xenogenic tooth bone graft material and xenogenic bone graft material. Methods: Three types of human tooth bone graft material (chips, crowns, and roots) and BioOss (Geistlich Pharma AG, Wolhausen, Switzerland) was filled at the preformed 4 round-shaped calvarial bone defects of beagle dogs. The beagles were sacrificed at 2, 4, 8, and 12 weeks, respectively, for radiological and histological evaluation. Results: Increased strength and radiopacity were detected in all graft material groups in time-dependent manner. New bone was formed and matured surrounding the graft material histologically. Also, a new bone was directly integrated with graft material. Conclusion: It was expected that newly developed tooth bone graft material would show good bone healing capacity if it was used as a graft material for the restoration of bony defect.

Cesar Vallejo, Profeta Cristiano?

김영균Kim, Young-Kyun 檀國大學校 出版部 1991 論文集 Vol.25 No.1

외상과 턱관절 장애 연관성에 관한 연구

김영균,윤필영,안민석,김재승,Kim, Young-Kyun,Yun, Pil-Young,Ahn, Min-Seok,Kim, Jae-Seun 대한악안면성형재건외과학회 2009 Maxillofacial Plastic Reconstructive Surgery Vol.31 No.5

Objective : Trauma has been a controversial issue although it has been considered to be a major factor for the temporomandibular disorder(TMD). We evaluated the relationship between macrotrauma or microtrauma and TMD. Methods : This study was performed in patients with TMD undergoing treatment at SNUBH from October 2006 to January 2007. Sixty one male patients and 166 female patients(total 227) were included and the average age was 34 years(ranging from 14 to 85 years). We investigated the possible etiologic factors, diagnosis and treatment with the review of medical records and radiography. Chronic pain, depression, somatic score(including pain item), somatic score(excluding pain item) were evaluated on the basis of diagnostic index from the Research Diagnostic Criteria on TMD. Results : Eighteen patients(7.9%) out of 227 patients suffered from TMD as a result of macrotrauma. Ninety four(41.4%) patients had microtrauma and six patients(2.6%) had both macro- and microtrauma(etiologic factor). The main symptoms included pain. joint noise and mouth opening limitation while the other symptoms were headache and tinnitus. The patients had suffered from TMD for average 41 weeks (ranging from 1 to 480 weeks). 116 patients took splint as a major treatment. As a prognosis, 19 patients(8.4%) recovered completely. 26(11.0%) had improvement and 181(80%) had persistent symptoms. 1 patient(0.4%) underwent an arthroplasty. Diagnostic index from RDC chart showed that macrotrauma was the highest score(except depression score) among the other etiologic factors. Conclusion : This study showed that macro- and microtrauma can be considered to be the major etiologic factors of TMD, which also affect the chronic, depression and somatic discomfort.

골유도 재생술과 임프란트 식립: 동시식립과 지연식립의 비교

김영균,윤필영,임재형,황정원,이효정,Kim, Young-Kyun,Yun, Pil-Young,Im, Jae-Hyung,Hwang, Jeong-Won,Lee, Hyo-Jung 대한악안면성형재건외과학회 2007 Maxillofacial Plastic Reconstructive Surgery Vol.29 No.4

Adequate bone quantity is one of the important factor to obtain osseointegration after implantation. Guided bone regeneration (GBR) has widely used in implantation for reconstruction of bony defects. Since introducing this procedure, there are many studies about survival rate of implants, changing in surrounding bone volume after function. The purpose of this study was to evaluate the amount of resorption according to placement timing and survival rate after function. The subjects were patients who had been operated with GBR from Jun 2003 to Jun 2004 in Seoul National University Bundang Hospital. They were divided into simultaneous and delayed placement group. The follow up had been performed at the time of just after GBR, 1, 3, 6, 12, 24-month later and standard periapical radiographs were taken to estimate the bone level at the time. The total average of bone level change in radiographs was 1.94mm(${\pm}0.25$), and 1.92mm(${\pm}0.72$) in simultaneous installation, 2.03mm(${\pm}0.25$) in delayed installation. In this report, the survival rates were 92.2% in simulataneous group and 92.3% in delayed group. Insufficient primary stability, early contamination of wound, overloading, poor oral hygiene, and infection were thought to be associated factors in the failed cases.

하악골 골절 환자들의 악관절 상태 평가: 일차보고 관절내시경적 검사, 조직형태학적 및 관절활액 분석

김영균,김현태,이도훈,최윤정,정훈,Kim, Young-Kyun,Kim, Hyoun-Tae,Lee, Do-Hoon,Choi, Yoon-Jung,Chung, Hoon 대한구강악안면외과학회 2001 대한구강악안면외과학회지 Vol.27 No.4

The purpose of this study is to validate the potential etiologic factors for temporomandibular disorder(TMD). TMJ arthroscopic examination was performed in upper joint compartment of 32 joints from 20 patients with mandibular fractures. Synovial fluid was collected from the upper joint space during pumping manipulation with normal saline. Cytologic smearing and histomorphologic exam of synovial fluid were performed in 15 joints. Prostaglandin $E_2(PGE_2)$ concentration was measured in 11 joints. Leukotriene $B_4(LTB_4)$ concentration was measured in 8 joints. There were several arthroscopic variables such as ecchymosis, fibrillation, and adhesion. Histomorphologic exam showed a variety of findings such as bloody smears, cellular cluster, degenerated cells and cartilage, undifferentiated crystal. Mean $PGE_2$ concentrations were 316.5 pg/ml. Mean LTB4 concentrations were 45.9pg/ml. This study demonstrated a variety of findings on inflammatory and degenerative changes of TMJ. Because acute trauma such as mandibular fracture is a major etiologic factor in cartilage degradation and biochemical and intraarticular pathology, clinicians must identify and address TMJ signs and symptoms during follow-up periods in the long term.

웹 기반 RMS 설계 및 구현

김영균,Kim Young-kyun 한국컴퓨터산업학회 2005 컴퓨터産業敎育學會論文誌 Vol.6 No.3

원격 모니터링 시스템(RMS; Remote Monitoring System)은 산업의 자동화 과정에 따라 다양한 분야에 적용되고 있으며, 단순한 상태 감시기능에서 멀티미디어 인터페이스 기반의 실시간 제어 기능을 갖는 복합 응용시스템으로 발전하고 있는 추세이다. 본 연구에서는 네트워크로 연동된 원격 사이트의 타겟 시스템(target system)을 클라이언트의 웹 브라우저에서 모니터링 할 수 있는 감시기능과 특정 동작을 제어할 수 있는 제어기능을 갖는 웹 기반 모니터링 시스템을 개발하였다. 개발 시스템은 클라이언트가 웹 브라우저에서 타겟 시스템의 상태를 실시간으로 감시할 수 있는 모니터링 기능, 클라이언트가 모니터링 화면에서 특정 모듈의 값을 설정함으로써 시스템의 상태를 제어하는 출력제어 기능, 클라이언트가 웹 환경에서 타겟 시스템의 환경 변수를 직접 설정 또는 변경할 수 있는 환경설정 기능, 네트워크에 연동된 화상카메라를 이용하여 타겟 시스템 주변 환경을 비디오로 감시할 수 있는 비디오 감시기능 등으로 구성되어 있다. 본 RMS는 웹 기반의 인터페이스로 타겟 시스템에 쉽게 접근 및 관리가 가능하며, 특히, 무인 자동화 설비 및 폐쇄 공간 등에서 유용하게 활용될 수 있다. The RMS(Remote Monitoring System) is generalized to adopt in many automatic system by progress of industrial and technical growth. RMS has been developed from simple status monitoring system to realtime control system with multimedia interface. This study is to design and develop monitoring system that client is able to monitor and control target system on web browser. The RMS is consist of 4 functional modes, which is monitoring mode, control mode, setup mode and video mode. Monitoring mode is to observe remote target system with realtime on web browser. Control mode is to change target system status in monitoring mode. Setup mode is to change system variable in control mode. Video mode is to monitor target system environment visually by web camera. This RMS is easy to access and manage target system, and so useful to monitor remote automatic system and closing site.

패키지 딜 방식의 해외 에너지자원 획득에 관한 플랜트EPC기업참여 촉진방안연구

김영균,문선애,문승재,이재헌,유호선,Kim, Young-Kyun,Moon, Sun-Ae,Moon, Seung-Jae,Lee, Jae-Heon,Yoo, Hoseon 한국플랜트학회 2009 플랜트 저널 Vol.5 No.2

Promoting policy to involve plant EPC companies for package deal has been studied to acquire overseas energy resources. The effectiveness of the package deal with the plant EPC companies has not been successful because the participation of the plant EPC companies is very rare. It is difficult for the plant EPC companies to join the package deal due to the lack of the fully responsible organization to support the plant EPC companies participating in a package deal. The followings are suggested as the ways to promote the participation of the plant EPC companies for package deal in this study; 1) financial support of the government for plant EPC companies 2) political support of the government for plant EPC companies 3) specialization of the advanced countries for public-private cooperation.

기계적 합금화 공정으로 제조된 Fe-14Cr Ferritic 산화물 분산 강화(ODS) 합금 강의 고온 산화 거동

김영균,박종관,김휘준,공만식,이기안,Kim, Young-Kyun,Park, Jong-Kwan,Kim, Hwi-Jun,Kong, Man-Sik,Lee, Kee-Ahn 한국분말야금학회 2017 한국분말재료학회지 (KPMI) Vol.24 No.2

This study investigates the oxidation properties of Fe-14Cr ferritic oxide-dispersion-strengthened (ODS) steel at various high temperatures (900, 1000, and $1100^{\circ}C$ for 24 h). The initial microstructure shows that no clear structural change occurs even under high-temperature heat treatment, and the average measured grain size is 0.4 and $1.1{\mu}m$ for the as-fabricated and heat-treated specimens, respectively. Y-Ti-O nanoclusters 10-50 nm in size are observed. High-temperature oxidation results show that the weight increases by 0.27 and $0.29mg/cm^2$ for the as-fabricated and heat-treated ($900^{\circ}C$) specimens, and by 0.47 and $0.50mg/cm^2$ for the as-fabricated and heat-treated ($1000^{\circ}C$) specimens, respectively. Further, after 24 h oxidation tests, the weight increases by 56.50 and $100.60mg/cm^2$ for the as-fabricated and heat-treated ($1100^{\circ}C$) specimens, respectively; the latter increase is approximately 100 times higher than that at $1000^{\circ}C$. Observation of the surface after the oxidation test shows that $Cr_2O_3$ is the main oxide on a specimen tested at $1000^{\circ}C$, whereas $Fe_2O_3$ and $Fe_3O_4$ phases also form on a specimen tested at $1100^{\circ}C$, where the weight increases rapidly. The high-temperature oxidation behavior of Fe-14Cr ODS steel is confirmed to be dominated by changes in the $Cr_2O_3$ layer and generation of Fe-based oxides through evaporation.