김경아 교수

Black coral skeletons are laminated composites, composed primarily of chitin fibrils and non-fibrillar protein. This paper examines mechanical properties of the composite and the architecture of the chitin component. Two species are shown to differ significantly in their tensile strength and fibril structure. The skeleton of Antipathes salix, a Caribbean species of commercial value, is stiffer, harder, darker, more dense, and more hydrophobic than Antipathes fiordensis from New Zealand. The chit

BACKGROUND: To evaluate the three-dimensional (3D) changes after mandibular setback surgery (MSS) in skeletal Class III malocclusion using cone-beam computed tomography (CBCT) and a structured light-based scanner. METHODS: Twenty-eight adult Korean patients with skeletal Class III malocclusion treated by MSS were evaluated. CBCT and facial scan images were recorded one week before and six months after surgery. To use an identical 3D coordinate system, superimposition was performed, and nine skel

In scissors bite cases, a good diagnosis will help the clinician to decide whether treatment should involve orthognathic surgery. The authors have shown a case that was corrected with surgery and a case that was corrected using TSAD anchors. Treatment planning must include evaluation of the basal arch width of maxilla and mandible in class I occlusion, any skeletal asymmetry concomitant with a mandibular shift, the inclinations or atypical eruption degree of the posterior teeth, and the number o

Facial asymmetry can be classified into the rolling-dominant type (R-type), translation-dominant type (T-type), yawing-dominant type (Y-type), and atypical type (A-type) based on the distorted skeletal components that cause canting, translation, and yawing of the maxilla and/or mandible. Each facial asymmetry type represents dentoalveolar compensations in three dimensions that correspond to the main skeletal discrepancies. To obtain sufficient surgical correction, it is necessary to analyze the

Heart failure is a chronic disease requiring lifetime self-management at home by patients, who often require additional support. However, the long-term nature of this self-management presents great challenges for both heart failure patients and their family caregivers. The role of family caregivers is critical, but little is known about the relationship between the burden, stress, depressive symptoms, and quality of life in the family caregivers of heart failure patients. We aimed to explore car

OBJECTIVES: To evaluate three-dimensional (3D) craniofacial changes induced by a non-surgical tooth-bone-borne rapid palatal expander (TBB-RPE) according to the symmetrical pattern of expansion, to investigate the 3D changes between the sides in patients with asymmetric expansion, and to identify the related factors of asymmetric expansion. SETTING AND SAMPLE POPULATION: Sixty-six patients (mean age: 19.3 ± 5.7 years) treated with TBB-RPE were divided into a symmetric expansion group (Group S, n

PURPOSE: This narrative review aims to elucidate the anatomical features of sleep-disordered breathing (SDB) in children. By identifying key structures and intervening proactively, we seek to alter craniofacial growth patterns and improve functional outcomes for SDB children. METHODS: The literature on pediatric sleep-disordered breathing (PSDB), pediatric obstructive sleep apnea (OSA), anatomical predispositions, and the relationship between skeletal deformity and PSDB was examined using PubMed

The expression of MMP-2 and -9 might contribute to periodontal physiological and pathological processes, and the degree of MMP-9 expression and activity are predictive indicators relevant to the progression of periodontitis.

Treatment of multiple impacted teeth is challenging. Three-dimensional treatment planning can help in delivering a better outcome. This case report presents a patient with an incomplete dental transposition between the canine and lateral incisor of the maxillary right side associated with the impaction of a dilacerated right central incisor. Using a two-stage surgical exposure and augmented corticotomy, the patient's occlusion and smile esthetics were significantly improved, and Class I occlusal

Background: There is limited understanding of the effect of dietary components on the absorption ofginsenosides and their metabolites into the blood. Methods: This study investigated the pharmacokinetics of the ginseng extract and its main constituentginsenoside Rb1 in rats with or without pretreatment with a prebiotic fiber, NUTRIOSE, by liquidchromatography tandem mass spectrometry. When ginsenoside Rb1 was incubated with rat feces, itsmain metabolite was ginsenoside Rd. Results: When the inte

본 연구는 전통미술작품감상 및 관련 통합활동이 유아의 미적태도와 자아존중감 향상에 도움이 될 것인지 알아보고자 하였다. 이를 위해 전통미술작품 감상 및 관련 통합 프로그램을 구성하였으며, 서울시에 중랑구 소재 D유치원의 만 5세 유아 46명을 대상으로 적용하였다. 유아는 프로그램을 적용한 실험집단과 종래 표현중심 미술활동을 한 비교집단으로 구분하였으며, 사전과 사후 검사를 통해 프로그램 효과를 검증하였다. 검증결과 프로그램은 유아의 미적태도 중 표상 능력 향상에 긍정적인 영향력을 보였으나, 예술성 향상에 미친 효과는 미미했다. 자아존중감의 경우 긍정적인 영향력을 갖는 것으로 나타났다. 이로써 전통미술작품 감상을 통한 통합활동 경험은 유아의 그림 표상 능력 증진과 자아존중감의 향상에 효과가 있다고 할 수 있겠다.

Facial asymmetry can be classified into the rolling-dominant type (R-type), translation-dominant type (T-type), yawing-dominant type (Y-type), and atypical type (A-type) based on the distorted skeletal components that cause canting, translation, and yawing of the maxilla and/or mandible. Each facial asymmetry type represents dentoalveolar compensations in three dimensions that correspond to the main skeletal discrepancies. To obtain sufficient surgical correction, it is necessary to analyze the

Purpose: Matrix metalloproteinases (MMPs) are capable of degrading extracellular matrix, and they are inducible enzymes depending on an inflammatory environment such as periodontitis and bacterial infection in periodontal tissue. Gingival inflammation has been postulated to be correlated with the production of MMP-2 and MMP-9. The objective of this study was to quantify the expression and activity of MMP-9 and -2, and to determine the correlation between activity and expression of these MMPs in