Correlation analysis of gingival recession after orthodontic treatment in the anterior region: an evaluation of soft and hard tissues

이종빈,백수진,김민지,방은경 대한치주과학회 2020 Journal of Periodontal & Implant Science Vol.50 No.3

Purpose: The aim of this study was to investigate and identify the main causes of periodontal tissue change associated with labial gingival recession by examining the anterior region of patients who underwent orthodontic treatment. Methods: In total, 45 patients who had undergone orthodontic treatment from January 2010 to December 2015 were included. Before and after the orthodontic treatment, sectioned images from 3-dimensional digital model scanning and cone-beam computed tomography images in the same region were superimposed to measure periodontal parameters. The initial labial gingival thickness (IGT) and the initial labial alveolar bone thickness (IBT) were measured at 4 mm below the cementoenamel junction (CEJ), and the change of the labial gingival margin was defined as the change of the distance from the CEJ to the gingival margin. Additionally, the jaw, tooth position, tooth inclination, tooth rotation, and history of orthognathic surgery were investigated to determine the various factors that could have affected anterior periodontal tissue changes. Results: The mean IGT and IBT were 0.77±0.29 mm and 0.77±0.32 mm, respectively. The mean gingival recession was 0.14±0.57 mm. Tooth inclination had a significant association with gingival recession, and as tooth inclination increased labially, gingival recession increased by approximately 0.2 mm per 1°. Conclusions: In conclusion, the IGT, IBT, tooth position, tooth rotation, and history of orthognathic surgery did not affect labial gingival recession. However, tooth inclination showed a significant association with labial gingival recession of the anterior teeth after orthodontic treatment.

기도를 압박하여 호흡곤란을 유발한 식도이물 1례

이종빈,김호중,조영순,이명갑,유병대,전덕호 대한응급의학회 2011 大韓應急醫學會誌 Vol.22 No.2

Foreign bodies that migrate outside the esophagus into the mediastinum or soft tissues usually cause respiratory symptoms. Also, esophageal foreign body granulomas that cause tracheal stenosis, lobar atelectasis, and bronchoesophageal fistulas are reported as complications. Foreign bodies can become lodged above esophageal strictures, and chronically-embedded esophageal foreign bodies can induce stricture formation, although these are less common. This is rare case report that the trachea was directly compressed due to impacted esophagus by foreign body.

The prognosis of splinted restoration of the most-distal implants in the posterior region

이종빈,김만용,김창성,김영택 대한치과보철학회 2016 The Journal of Advanced Prosthodontics Vol.8 No.6

PURPOSE. The aim of this study was to compare the efficacies of two-implant splinting (2-IS) and single-implant restoration (1-IR) in the first and second molar regions over a mean functional loading period (FLP) of 40 months, and to propose the appropriate clinical considerations for the splinting technique. MATERIALS AND METHODS. The following clinical factors were examined in the 1-IR and 2-IS groups based on the total hospital records of the patients: sex, mean age, implant location, FLP, bone grafting, clinical crown–implant ratio, crown height space, and horizontal distance. The mechanical complications [i.e., screw loosening (SL), screw fracture, crown fracture, and repeated SL] and biological complications [i.e., peri-implant mucositis (PM) and peri-implantitis (PI)] were also evaluated for each patient. In analysis of two groups, the chi-square test and Student’s t-test were used to identify the relationship between clinical factors and complication rates. The optimal cutoff value for the FLP based on complications was evaluated using receiver operating characteristics analysis. RESULTS. In total, 234 patients with 408 implants that had been placed during 2005 - 2014 were investigated. The incident rates of SL (P<.001), PM (P=.002), and PI (P=.046) differed significantly between the 1-IR and 2-IS groups. The FLP was the only meaningful clinical factor for mechanical and biological complication rates in 2-IS. CONCLUSION. The mechanical complication rates were lower for 2-IS than for 1-IR, while the biological complication rates were higher for 2-IS. FLP of 39.80 and 46.57 months were the reference follow-up periods for preventing biological and mechanical complications, respectively.

Evaluation of prognosis related to compliance with supportive periodontal treatment in patients with chronic periodontitis: a clinical retrospective study

이종빈,신혜정,김대엽,방은경 대한치주과학회 2019 Journal of Periodontal & Implant Science Vol.49 No.2

Purpose: The purpose of this study was to evaluate the prognostic effect of patient compliance with supportive periodontal treatment (PC-SPT). Chronic periodontitis patients were classified based on their compliance level, and factors affecting PC-SPT and the prognosis of PC-SPT were investigated. Methods: This study selected 206 patients who started SPT after receiving periodontal treatment between 2010 and 2012. Patients who continued SPT through February 2016 were included. The patients were classified according to whether they exhibited complete compliance (100% of visits), excellent compliance (≥70% of visits), incomplete compliance (<70% of visits), or non-compliance (only 2 visits). Patient characteristics that could affect PC-SPT, such as age, sex, distance of the clinic from their residence, implantation, and periodontal treatment, were investigated. The number of newly decayed and extracted teeth, alveolar bone level changes around the teeth and implants, and implant removal were examined to evaluate the prognosis of PC-SPT. Results: Sex and the presence of an implant significantly affected PC-SPT. Additionally, the number of newly decayed and extracted teeth and changes in alveolar bone levels around the teeth and implants were significant prognostic factors related to PC-SPT. Conclusions: PC-SPT in chronic periodontitis patients will help maintain periodontal health and prevent further periodontal disease.

Numerical Modeling of Roller Leveler for Thick Plate Leveling

이종빈,강성수 한국정밀공학회 2018 International Journal of Precision Engineering and Vol.19 No.3

To ensure quality of the steel structures used in the shipbuilding and construction industry, the thick plate market increasingly demands for more flatness and higher residual stress. Diminishing slit camber caused by residual stress and incorrect flatness due to aging effect has recently emerged as important quality issues. In the current study, we proposed a new numerical model for a twodimensional roller leveler which calculates the curvature and moment of the material depending on the intermesh. This curvature was used to calculate the stress and strain values of the material along the thickness direction. Correction factors were also introduced to correct the location of the contact point that changes when the relationship between the intermesh and curvature was assumed as three-point bending of a concentrated load at the plate center. The result from this numerical model and that of the finite element analysis were compared to verify the effectiveness of this model.

2000 추계 학술발표회 논문집 ( 2000 . 11 . 3 ) : 건설안전분야 ; 건설현장 안전관리수준 평가 방안에 관한 연구

이종빈,고성석 한국안전학회(구-한국산업안전학회) 2000 2000년 추계 학술발표회 논문집 Vol.- No.-

안전한 속목정맥의 중심정맥도관삽입을 위한 환자의 자세: 중환자를 대상으로 한전향적 관찰 연구

이종빈,김재윤,임훈,김호중,최재형,조영순 대한응급의학회 2013 大韓應急醫學會誌 Vol.24 No.5

Purpose: Carotid artery injuries are common complications during catheterization of the internal jugular vein. To increase successful catheterization, the best position for the reduction of carotid artery injuries was determined. Unlike a previous study, only critically ill patients who needed central venous catheterization in an emergency medical center were included. Three maneuvers were evaluated:Trendelenburg position, head rotation, and adjustments according to ultrasound probe level. Methods: Eight positions were tested in each patient. The positions were classified by maneuver and ultrasound images of each position were stored. Two factors were determined at each position: “safety width” (the part of the internal jugular vein that did not overlap with the carotid artery) and “overlap width” (the part of the internal jugular vein that did overlap with the carotid artery). Results: Compared with the neutral bed position, safety widths were significantly larger in the Trendelenburg position,and there were no statistical difference in overlap widths. Compared with the non-head rotation position, safety widths were smaller and overlap widths were significantly larger in the 45 head rotation positions. Safety widths didnot statistically change safter adjustments for ultrasound probe level. However, changing the ultrasound probe level from the base of Sedillot’s triangle to thyroid cartilage significantly decreased overlap widths. Overall, The group of Trendeleberg position, with non-head rotation, whose ultrasound probe level was thyroid cartilage had largest safety widths among 8 groups. Conclusion: Among the eight positions tested, the Trendelenburg position (with limited head rotation and adjustments for ultrasound probe level) can reduce carotid artery injuries and increase the successful catheterization of the jugular vein in critically ill patients.

베바시주맙 주사 후 남아있는 망막분지정맥폐쇄로 인한 부종에서 덱사메타손 반응 예측인자

이종빈,김현연,김윤영,이근우 대한안과학회 2022 대한안과학회지 Vol.63 No.4

목적: 망막분지정맥폐쇄로 인한 황반부종이 베바시주맙 주사 치료 후에도 남아있는 경우, 유리체강 내 덱사메타손삽입물 주사 치료의반응과 예측인자에 대해서 알아보고자 한다. 대상과 방법: 황반부종으로 베바시주맙을 한 달 간격으로 3차례 시행받았으나 한 달 뒤(주사 결정 시기)에도 부종이 남아서 추가적인주사 치료(덱사메타손 또는 베바시주맙)를 받은 63안을 대상으로 후향적으로 분석하였다. 추가 치료 약제에 따라 두 군을 나누었고, 진단 후 6개월 시점에서 황반부종의 소실 여부로 충분 반응과 부분 반응군으로 나누어 군 간 중심망막두께, 황반하 맥락막두께, 고반사점과 그 값들의 변화량에 대해 분석하였다. 결과: 32안의 덱사메타손군과 31안의 베바시주맙군이 분석에 이용되었다. 주사 결정 시기에서 덱사메타손 충분 반응군이 덱사메타손부분 반응군보다 중심망막두께가 두껍고 중심망막두께의 변화가 작았다(p<0.05). 그리고 주사 결정 시기에 덱사메타손 충분 반응군이 베바시주맙 충분 반응군보다 황반하 맥락막두께의 변화가 적고, 중심망막두께가 두꺼우며, 중심망막두께 변화가 유의하게 작았다(p<0.05). Youden index를 통해 구한 절단값은 중심망막두께 409 μm, 중심망막두께 변화량 62.5 μm였다(각각 p=0.002, p=0.011). 결론: 세 차례의 베바시주맙 주사 치료 후에도 황반부종이 남아있는 경우, 중심망막두께가 두껍거나(약 400 μm 이상) 중심망막두께변화량이 작으면(약 62 μm) 베바시주맙에서 덱사메타손삽입물로 약제를 변경하는 것이 황반부종을 감소시키는 데 효과적일 수 있다.

경부에 발생한 림프구 전형적 호지킨 림프종 1예

이종빈,김기식,권오성,김기권 東國大學校醫學硏究所 2005 東國醫學 Vol.12 No.1

원발성 구강인두결핵 2예

이종빈,김기식,권오성,정동우,김동훈 東國大學校醫學硏究所 2005 東國醫學 Vol.12 No.2

결핵은 신체의 어느 부위에서나 발생할 수 있는데, 구강인두결핵은 항결핵제 및 예방, 조기진단의 발달로 최근에는 더욱 드물게 발생하는 질환이다. 더구나 국내의 구강 및 인두 결핵 보고는 거의 폐결핵이나 후두결핵에 속발된 것이고, 원발성 구강 및 인두 결핵은 매우 드문 것으로 되어 있다. 최근 저자들은 원발성 구강인두결핵 2예를 경험하였기에 문헌 고찰과 함께 보고하는 바이다. Oropharyngeal tuberculosis associated with active pulmonary tuberculosis was a common disease in the past. The incidence of tuberculosis has been greatly reduced with advent of ant i—tuberculous chemotherapy, although tuberculosis has been not eradicated. Authors recently experienced two cases of primary tuberculosis of oropharynx. One patient was 67 years old man with complaint of sore throat and odynophagia for two months. And the other was 47 years old man with soreness and foreign body sensation of oral cavity for one month. Histopathologically, they were confirmed as tuberculosis of the oropharynx, however chest X—ray revealed negative and tubercle bacilli could not identified in sputum by smear and culture. So authors report these cases with the review of the literature.