• Journal of the korean academy of Pediatric Dentistry
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• v.27 no.4
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• pp.524-534
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• 2000

Deciduous teeth can be extracted for two reasons, one due to the physiologic resorption and the other by the inflammation at the apex after traumatic injury. Physiologic resorption may be different from pathologic resorption in timing and mechanism. Therefore we resumed the different features of physiologic and pathologic resorption root surfaces. Many previous studies showed micromorphology of resorbed surface of roots of deciduous teeth. But, few studies compared physiological and pathological root resorption surfaces. In this study, we carefully observed microscopic morphologies of those two different root surfaces by scanning electron microscope and histologic features by light microscope. The resultant differences between physiologic and pathologic resorption surfaces of deciduous teeth were as follows: 1. The morphology of pathologic resorption lacunae due to inflammation varied in size and shape with irregular boundaries compared with the physiologic areas from scanning electron microscope observations. 2. From light microscope observations, several large resorption fossae containing numerous resorption lacunae were found, whereas the resorption lacunae were irregular in shape with pathologic resorption surface. 3. Numerous multinucleated giant cells were closely attached to the physiologic resorption lacunae, whereas several kinds of mesenchymal cells with numerous inflammatory cells were found in the areas adjacent to the pathologic resorption surface. 4. Light microscope findings showed that compensating cementum formation took place along some of the areas of inflammatory dentinal resorption. In conclusion, several morphological differences were present between physiologic and pathologic root resorption surfaces of human deciduous teeth. The future studies should include cytochemistry to clarify the cellular roles in resorption process observations of pulpal surfaces of coronal and radicular dentin to and the changes that occur in each phase of human deciduous tooth resorption.

• Proceedings of the Korean Fiber Society Conference
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• 2001.10a
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• pp.33-36
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• 2001

고흡수성 고분자는 이온성기를 가진 수용성 고분자에 부분적인 가교결합을 도입하여 일반적으로 카르복실기 이온 (-COO-)등과 같은 친수성기를 다량으로 지닌 3차원 망상구조를 지니는 수용성 고분자이다[1]. 여지껏 물을 흡수하는 목적으로 사용된 흡수소재는 면, pulp, sponge 등이 일반적으로 알려져 있다. 이들은 모세관 현상에 의해 물을 흡수하는 것으로 알려져 있으며, 이들 흡수 재료의 흡수능력은 자기 무게의 수백 배로부터 천 배까지의 물도 흡수하며 외압하에서도 잘 탈수되지 않는 고기능성 고분자이며 그 원리는 다음과 같다. (중략)

• Proceedings of the Korean Fiber Society Conference
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• 1998.10a
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• pp.21-24
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• 1998

흡수성 고분자는 주로 기저귀, 생리대, 농업용 뿌리 덮개 등에 사용되며, PAN(폴리아크릴 로니트릴) 그라프트 전분으로 대표되는 그라프트 공중합체와 가교된 아크릴레이트 고분자로 대표되는 수용성 단량체의 단중합체 또는 공중합체 등에 대한 연구가 가장 활발히 이루어져 왔다. 이들 고흡수성 재료들은 염용액에 대한 흡수도가 낮다는 단점이 있으며, 보다 강한 이온기를 도입하거나, 고흡수성 재료가 양쪽성을 나타낼 경우, 염에 대한 흡수도가 개선된다는 연구결과가 보고된바 있다. (중략)

• Journal of the Korean Arthroscopy Society
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• v.17 no.1
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• pp.50-55
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• 2013

Purpose: The purpose of this study was to compare the clinical results of absorbable knot-tying and absorbable knotless suture anchors in arthroscopic Bankart repair. Materials and Methods: This study compared the patients who underwent arthroscopic Bankart repairs using absorbable knottying suture anchors (59 patients: KT Group), and absorbable knotless suture anchors (52 patients: KL Group). Preoperative and postoperative evaluations were performed by Rowe scores, patient satisfaction score, visual analogue scale (VAS), American shoulder and elbow surgeons (ASES) score, range of motion (ROM), and re-dislocation rate. Results: Postoperative VAS, Rowe scores, ASES score were significantly not different between the 2 groups (VAS: p=0.250, Rowe score: p=0.412, ASES: p=0.052). Mean postoperative VAS was 0.5 in KT Group and 0.8 in KL Group (p=0.250), and limited ROM was noted only in one patient in KL Group. Mean Rowe score was 94.3 in KT Group and 96.3 in KL Group (p=0.412), and mean ASES score was 97.3 in KT Group and 94.0 in KL Group (p=0.052). Re-dislocation rate were no different between the 2 groups. Conclusion: There were no differences in clinical outcomes and re-dislocation rate between Knot-Tying and Knotless repairs.

• Proceedings of the KACD Conference
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• 2003.05a
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• pp.291-291
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• 2003

손상에 의한 치근 흡수는 표면 흡수(surface resorption), 염증성 흡수(inflammatory resorption) 및 대치성 치근 흡수(replacement resorption)가 있는데 치근 흡수의 정도는 탈구와 재식 사이의 시간, 치주 인대의 손상 정도, 탈구된 치아의 보관 조건 및 치아 발육 정도 등에 영향을 받는다.(중략)

• Journal of the Korean Arthroscopy Society
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• v.11 no.1
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• pp.54-58
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• 2007

Either absorbable or nonabsorbable sutures can be used in meniscal repair. Some surgeons prefer nonabsorbable sutures because they believe that nonabsorbable sutures improve meniscal healing as compared with absorbable sutures. But, permanent existence of sutures in the lesion could make problems. We report a case of Inside-Out meniscus repair that nonabsorbable sutures came out of the joint capsule tearing the substance of the meniscus.

• Elastomers and Composites
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• v.47 no.2
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• pp.141-147
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• 2012

Silicone resin has no water-absorbing function because it is a strong hydrophobic polymer. However, addition of super absorbent polymer gives much better absorbency than that of conventional silicone resin. In this study, we developed novel silicone materials with water-absorbing function by choosing three types of amorphous acrylic super absorbent polymers with different particle sizes, determining the mixing ratio of the three polymers and applying the mixtures into two-component type silicone material for medical purpose. The change in the mechanical properties such as tensile strength, tear strength, compressive strength and hardness was investigated by varying the particle size and content ratio of the added super absorbent polymers while preparing the silicone resins. The absorbency of the silicone resins was measured over time. Additionally, the particle shape of the super absorbent polymers as well as the distribution within the silicone resin was observed using an optical microscope.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2015.11a
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• pp.166-167
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• 2015

단열재를 생산하는 회사에서는 대부분 유기단열재를 사용하고 있다. 커튼윌 시스템은 경제적이면서 성능이 우수하지만 불연성이지 않다. 따라서 근래에 안전사고가 많아지고 있어서 타지 않는 무기 단열재가 필요하다. 또한 안전과 단열효과 및 소비자가 요구하는 친환경적인 무기단열재가 필요하므로 불연성 무기단열재의 개발이 시급하다. 본 논문은 무기단열재의 문제인 흡수성을 실험하기 위하여 가습기를 이용하여 흡수성 실험을 하였고 경량골재인 펄라이트와 바인더를 섞고 흡수방지제로 처리한 샘플과 그렇지 않은 샘플의 흡수율을 측정하여 에너지 효율 지속성 단열재의 기술연구를 목표로 한다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.3
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• pp.763-769
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• 2021

In this study, ionic liquids were synthesized to remove carbon dioxide (CO2) on a laboratory scale. The vapor-liquid absorption equilibrium device (VLE) was used to investigate the carbon dioxide absorption capacity. In the regeneration study, the absorption capacity after regeneration was reduced by approximately 7% for all ionic liquids, in which the anion was sulfite-based, showing excellent regeneration. Ethyl sulfite showed the highest absorption capacity of CO2 among the ionic liquids based on the sulfite anion. In particular, the absorption capacity of [beim] ethyl sulfite was 1.1 mol CO2 / mol IL at an absorption equilibrium pressure of 22 bar. In the regeneration study, the absorption capacity after regeneration was reduced by approximately 7% for all ionic liquids, in which the anion was sulfite-based, from which regeneration is outstanding. After the absorption experiment, the viscosity of the sample tended to decrease by approximately 8% compared to that before the absorption experiment. On the other hand, the absorbent was synthesized in the first step. Moreover, the raw material used is also inexpensive and has excellent reproducibility and highly stable absorbent capacity.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2001.11a
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• pp.5-14
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• 2001

각종 섬유소재 중 흡한 흡수성이 우수한 100％ 면과 폴리에스테르 섬유를 이용하여 본 과제의 목표에 부합되는 최적의 제직, 제편 조직을 설정, 생산하여 상품화하였으며, 그 내용은 아래와 같다. (1) 흡한, 속건성 직물개발 : 직물의 구성인자(실의 번수, 밀도, 중량, 두께)에 따른 흡수성, 속건성을 검토하여 용도별 직물의 설계조건을 제시하였다. (2) 고흡한, 속건성의 2층 구조 편성물 개발 : 편성물의 구조를 피부측은 흡수하기 쉽고, 외측은 수분을 외부로 발산하기 쉽도록 2층 구조의 편성물을 제조하였다.