• Title/Summary/Keyword: RESTORATION TECHNIQUE

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CLINICAL CONSIDERATION OF INDIRECT BONDING TECHNIQUE (INDIRECT BONDING TECHNIQUE에 대한 고찰)

  • Lee, Kyung Hwan;Kim, Sang Cheol
    • The korean journal of orthodontics
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    • v.19 no.2
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    • pp.155-163
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    • 1989
  • Indirect bonding is done by placing the brackets on a model in the laboratory and using a template or tray to transfer the laboratory positioning to the teeth. The advantages of this technique are 1. decreased chair time 2. less patient discomfort 3. accuracy of a attachment placement 4. good adaptation of attachment to tooth contour 5. occlusal relationship of brackets and opposing teeth can be checked The disadvantages of the technique are 1. complex laboratory procedure 2. sometimes difficult on very short clinical crowns 3. teeth with crowns, large buccal restoration will not bond 4. may not be fitted close, if poor adaptation 5. likely to be disturbed setting Several indirect bonding techniques have proved reliable in clinical practice. However, they differ in the way the brackets are attached temporarily to the model, the type of transfer tray or other mechanism used, the adhesive or sealant employed, whether segmented or full bonding used, and the way the transfer is removed so as not to exert excessive force on a still maturing bond.

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A simple technique to fabricate a surgical obturator restoring the defect in original anatomical form

  • Shambharkar, Vaibhao I.;Puri, Santosh B.;Patil, Pravinkumar G.
    • The Journal of Advanced Prosthodontics
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    • v.3 no.2
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    • pp.106-109
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    • 2011
  • Oral cancer treatment involves the surgical removal of all or part of the maxilla, leaving the patient with a defect that compromises the integrity and function of the oral cavity. The postoperative restoration of esthetics, deglutition, and speech shortens recovery time in the hospital and expedites the patient's return to the community as a functioning member. The surgical obturator is the proven treatment option in such situations. This article describes a simple technique to fabricate a surgical obturator that restores patient's original dentition and facial and palatal tissue form. The obturator fabricated with this technique utilizes the vacuum formed index of patient's original tissue form and duplicated partly in heat and partly in auto polymerizing acrylic resin. Duplication of the original tissue form helps patient to minimize the immense physiological trauma immediately after the surgical resection. The obturator fabricated with this technique supports soft tissues after surgery and minimizes scar contracture and disfigurement, and thus may have a positive effect on the patients' psychology.

Marginal Leakage Test on 'Vivadent' Composite Resin (Vivadent의 변연누출에 관한 실험적 연구)

  • Kwon, Hyuk-Choon
    • The Journal of the Korean dental association
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    • v.23 no.12 s.199
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    • pp.1031-1037
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    • 1985
  • The purpose of this study was to evaluate the marginal sealing ability of 'vivadent.' Using freshly extracted human teeth and 2% aqueous methylene blue, the marginal leakage of dye in restorative materials such as vivadent with acid etching technique, Durafill with acid etching technique, silar with acid etching technique, Adaptic, and Amalgam were investigated at 37℃ and under temperature cycling in range of 4℃-60℃. The results were as follows; 1. All filling materials showed some degree of marginal penetration by 2% methylene blue dye. 2. Vivadent with acid etching technique revealed effective marginal sealing ability, but under temperature cycling it showed increased marginal leakage. 3. All resins showed greater marginal leakage than amalgam restoration. 4. Vivadent had the most effective marginal sealing ability in experimented resins.

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A Study on Improving Techniques of Festooning for Denture Base (총의치의 자연스러운 치은형성법에 관한 연구)

  • Shin, Moo-Hak;Kim, Yeoum-Soo;Choi, Un-Jae;Chung, Hee-Sun
    • Journal of Technologic Dentistry
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    • v.25 no.1
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    • pp.103-109
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    • 2003
  • The purpose of this study is to ensure natural restoration of gingiva's form by making effective use of materials in a bid to improve the technique of festooning for denture base. 1. The improved technique is expected to prevent the degradation and deformation of cavity structure and restore it. 2. The improved technique is expected to prevent the change of facial appearance from esthetic viewpoint and restore it. 3. The improved technique is expected to impress again the deformed part on wax denture for additional festooning.

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A Method for Restoring Trademark and Caption Areas using Isophote Information (등광도선 정보를 이용한 상표 및 자막영역 복원 방법)

  • 김종배;정수웅
    • Journal of the Institute of Electronics Engineers of Korea SP
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    • v.41 no.3
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    • pp.1-8
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    • 2004
  • In this paper, we propose a method for restoring trademark and caption areas using an isophote. In our method, the image restoration problem is modeled as an optimization problem, which in our case, is solved by a cost function with isophote constraint that is minimized using a GA The technique creates an optimal connection of all pairs of isophotes disconnected by a caption in the frame. For connecting the disconnected isophotes, we estimate the value of the smoothness, given by the best chromosomes of the GA and project this value in the isophote direction. Experimental results show that the isophote operator worked better than Laplacian operator for image restoration, and the proposed method has a great possibility for automatic restoration of a region in an advertisement scene.

Application for the Formation of Mild Meandering Channel Using the Spur of Riverbank (하안돌출부를 이용한 완만한 사행수로 형성을 위한 연구)

  • Park, Hyun Ki;Han, Man Shin
    • KCID journal
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    • v.21 no.1
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    • pp.118-126
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    • 2014
  • In this study, the use of the spur of riverbank technique is being investigated. The spur of the riverbank typically reduces the velocity of flow and protects the embankments by increasing friction along the water and the banks. This also has an effect in the rise of water level upstream. It is also used for the rectification of riverside line and restoration of the waterway through sedimentation near the spur of the riverbank. In this study, physical-scaled experiments are conducted to investigate the process of creating a mild meandering channel using the spur of the riverbank with varying water flows and sedimentation functions. The hydraulics observations are taken with respect to the varying heights and length of the riverbank's spurs and the distance between each spur for the formation of the mild meandering channel. It is observed that for 1.06 times of the meander length, it requires 2 times of the interval with each spur of river width. Similarly, 1.25L times of the meander length, it requires 0.5 times of the interval with each spur of river width. The sand accumulation is induced by the spur of riverbank when the spur of riverbank's heights are more than 40% of water depth and the length of the spur of riverbank needs under than 20% of river width for avoid exaggerated sand accumulation in the center of channel.

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Natural Vegetation Restoration and Management Plan by Ecological Approach (생태적 접근방법에 의한 식생복원 및 관리계획)

  • 이경재;최송현;강현경
    • Korean Journal of Environment and Ecology
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    • v.8 no.1
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    • pp.58-67
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    • 1994
  • Object of this study is to suggest the plan for natural vegetation restoration and management by ecological approach. The concept of biotope planting technique was introduced in order to restore the natural vegetation in the northern part of Mt. Nam in Seoul, and Quercus mongolica forests was surveyed so as to obtain the basic data. This study focused on the vegetational context between northern part of Mt. Nam and develop-reserved site. The results are following ; 1. It is suitable to plant 25~30 trees in $100\m^2$ with trees of DBH 10cm and below at intervals of about 2m in canopy layer. In the case of subtree layer of DBH 2cm, about 30 trees were planted at an Intervals of 1.5~2m around in $100\m^2$. 2. In the last step of nature vegetation restoration, it is desiable that canopy density is $5/100\m^2$ and 녀btree one is 10~20/$100\m^2$. 3. Management plans was proposed to use the native species of Mt. Nam around and to investigate the ecological situation once a year such as species introduce, dead-tree, soil, fauna etc.

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Application of Continuous Fiber Soil Reinforcement System in Riparian Slopes (연속섬유보강토공법의 하천구역 적용사례에 관한 연구)

  • Koh, Jeung-Hyun;Hur, Young-Jin;Choi, Jaeyong
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.14 no.3
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    • pp.169-176
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    • 2011
  • The purpose of this study is to examine the ecologically suitable restoration characteristics in riparian slopes constructed by continuous fiber soil reinforced system (Geofiber system) which does not contain the concrete materials. The findings are as follows : (1) as the tested soil was not washed away by rainfalls and floods, Geofiber could replace the concrete wall and gravity stone net bag technique from the civil engineering structural point of view; (2) after one year of the construction, it was monitored that land cover ratio was 80-90%, which indirectly shows that vegetation is safely maintained; and (3) at the same time, 5-8 flora species were found in each test grid and more importantly dominant species have been moved from alien species to native herbaceous plants. From the above findings, Geofiber system is recommendable to restore the riparian slopes in terms of stability and natural landscape points. However, a long term monitering is needed considering flora succession process in a given environment as well as suitability tests should be carried out through the comparative investigations in other environments.

Image Restoration using Weighted Cross-Shape Median Filter (가중격자형 메디안 필터를 이용한 영상복원)

  • Na, Cheol-Hun;Kim, Su-Yeong;Han, Man-Soo;Kang, Seong-Jun
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2015.10a
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    • pp.711-714
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    • 2015
  • A new technique for image restoration using Weighted cross-shaped median filter with edge-detection algorithm is proposed in this paper. It consists of simple hypothesis test for edge-detection, and makes use of the weighted cross-shape window. This method is applied to noise corrupted image and its results are compared with those of median filters. As for the experimental result, method of weighted cross-shape median filter is superior to other median filters.

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DEVELOPMENT OF ANTICARIOGENIC COMPOSITE RESIN (항우식성 복합레진의 가능성)

  • Park, Jeong-Won
    • Restorative Dentistry and Endodontics
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    • v.35 no.2
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    • pp.65-68
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    • 2010
  • Due to the improvement of the composite resin and esthetic desire of the patient, amalgam restoration has been replaced by composite resin. However, still there are many unsolved problems, for example, technique sensitivity, polymerization shrinkage stress and limited mechanical properties. These factors results in fracture of the restoration and secondary caries of the tooth. Also the use of the dental bonding system should be used for the retention of the restoration. In this paper, I want to talk about the present and the future of the remineralizing component released from dental composite resin to overcome the secondary caries and there possibility in the clinical use.