• Journal of the korean academy of Pediatric Dentistry
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• v.34 no.4
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• pp.694-699
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• 2007

Delayed tooth eruption is the most commonly encountered deviation from normal eruption time. Racial, ethnic, sexual, and individual factors can influence eruption and are usually considered in determining the standards of normal eruption. Delayed tooth eruption was affect to the dentition and facial growth, so that when it occurred careful evaluation should be performed to establish the cause and the treatment plan accordingly. Present 3 cases of delayed tooth eruption by periapical lesion, underdevelopment of incisior and compound odontoma were successfully treated. In these cases, we could observe spontaneous eruption of the delayed erupting tooth after removal of interrupting factor and space regaining with maintaining.

• Journal of the korean academy of Pediatric Dentistry
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• v.34 no.4
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• pp.700-708
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• 2007

A midline deviation is divided into three types, such as a skeletal midline deviation, a dental midline deviation, and a combination. Among them, the midline deviation which appear in the early mixed dentition without any skeletal problem can be managed differently by the stage of dental development. The location of the permanent incisors can be improved without using artificial force in consideration of the condition of the space, the eruption timing or the eruption path of the adjacent permanent teeth in early mixed dentition, especially when the permanent incisors are erupting. Therefore, the space supervision technique, which can have the teeth align themselves utilizing physiologic events such as sequence or timing of the eruption of permanent teeth, can be an alternative to orthodontic movement. This case report describes midline deviation improvement by space supervision.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.05a
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• pp.622-624
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• 2015

Tumor hypoxia caused by the unique characteristics of solid tumor sites such as lowered vascular density, irregular vasculature, longitudinal oxygen gradient, and unbalanced oxygen consumption has decreased therapeutic efficacy in several clinical trials such as radiation, chemotherapy, and surgery. Hence, tumor oxygenation studies at microvascular levels are important to provide better understanding of the complexity of microvasculature oxygen transport and exchange with tissue. However, polarographic microelectodes, was employed to measure $pO_2$ at the microvasculature level, but it is difficult to perform and does not provide significant spatial and temporal information of oxygen delivery. In this research, we introduce the hyperspectral imaging system able to provide a wide range of vascular characteristics by spatial maps on hemoglobin saturation information for better understanding of the relationship between blood oxygen delivery, hypervascularity, aberrant angiogenesis at microvasculature levels during tumor growth.

• Journal of Chest Surgery
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• v.43 no.5
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• pp.525-528
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• 2010

Congenital interruption of the inferior vena cava (IVC) can lead to secondary hepatic congestion, portal hypertension, and liver cirrhosis. A 49-year-old woman was admitted to the gynecology department with symptoms of menorrhalgia, known uterine myoma, and anemia. Abdominal computed tomography (CT) and venography performed at our hospital revealed congenital interruption of the IVC. The patient underwent retrohepatic cavoatrial bypass surgery with a polytetrafluoroethylene (PTFE) 16-mm ringed graft via posterolateral thoracotomy, and recovered without major complications. A retroperitoneal approach via posterolateral thoracotomy provides appropriate visualization during dorsal cavoatrial bypass in treating patients with congenital interruption of IVC.

• Journal of The Korea Institute of Healthcare Architecture
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• v.17 no.3
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• pp.35-42
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• 2011

Efficient space plans are built upon relations of both human and physical compositions, and the standard of the interaction is basically the human scale. Especially in medical areas, the character of the users within human scale design environment is quite significant. Unlike large hospitals with great plans and scalability performed by experts, mid-sized clinics tend to have limited space, designed by non-specialists who highlight aesthetics over functionality in floor plans which leads to poor quality in medical service. For this reason, this study will include the application of human scale based therapy rooms within the clinic from a physical standpoint and will further analyze and pinpoint any room for improvement to further enable more efficient ergonomic space planning. In this study, theoretically will contemplate over human scale, mid-sized clinic, therapies, and therapists, while the case study will include status of the recent human scale based mid-sized clinic from a physical viewpoint, classification and analysis amongst human and physical compositions chosen by discretion from either a newly opened or a newly re-modeled clinic within the last 2 years, which has 15 beds or more, minimum 3 physical therapists, with more than 5 different therapy facilities in the metropolitan area in order to measure the human scale of therapy rooms in a mid-sized clinic. As a result, the area where improvement can practically be applied is the physical composition, which does not include human scale like human composition factors as therapists and patients, and hence, I suggest the human scale applied efficient medical space plan become the base of this study and look forward to subsequent improvement in the quality of medical services.

• The Journal of Korean Academy of Prosthodontics
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• v.54 no.2
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• pp.160-166
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• 2016

Although physiologic abrasion in normal range need not to be corrected, when hard tissue of teeth are worn abnormally fast, it can cause severe damage and destroy esthetics and, functional structure of occlusion consequently. To establish a correct occlusal plane and space for the patient with worn dentition, it is necessary to increase vertical dimension. However, actual occlusal vertical dimension remains unhanged with compensation for the increase of alveolar bone height equivalent to the decrease of teeth length. A 74-year-old male presented with worn dentition and fractured tooth. Based on the assessment of OVD including clinical findings, full-mouth rehabilitation without increase of OVD was planned. This case presents that a satisfactory clinical result was achieved by restoring the worn dentition without changing occlusal vertical dimension.

• Journal of the korean academy of Pediatric Dentistry
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• v.35 no.2
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• pp.339-344
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• 2008

When a delayed eruption of tooth is diagnosed, the causative factor should be detected before an establishment of treatment plan, if possible. Although a panoramic radiograph is enough to evaluate the position of tooth and the stage of tooth development, a 3-D Dental CT would be a powerful tool to reveal a spatial relationships between objects. The reported case showed a delayed eruption of lower left permanent canine and a mini-plate with screws adjacent to the impacted canine. Although the screws adjacent to the root of impacted tooth showed a close proximity, it was not presumed that these screws would interfere the eruption of the tooth. The impacted canine did not show any spontaneous eruption during observation. After the mini-plate and screws were removed, an orthodontic traction using elastic power chain was performed. The position of mini-plates and screws should be carefully designed to avoid damaging the tooth follicles or tooth roots in the jaw. Also the screws should be removed before an orthodontic traction to prevent damaging the root surface of impacted tooth.

• Journal of the korean academy of Pediatric Dentistry
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• v.39 no.2
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• pp.166-173
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• 2012

Dilaceration is a developmental disturbance in shape of teeth. It refers to an angulation, or a sharp bend or curve, in the root or crown of a formed tooth. Dilacerations are estimated to occur in 3% of all permanent dentitions. However, the etiology of dilaceration is not yet fully understood. Traumatic injury to the deciduous predecessors and ectopic development of the tooth germ are the two commonly cited causes of this anomaly. The involved tooth is usually the maxillary central incisor and it also shows high prevalence of impaction. At first, We tried to do surgical exposure with orthodontic traction but to no avail. After then surgical repositioning of the dilacerated tooth was performed. Finally, Satisfactory results were obtained at the end of treatment, with improvement in dental esthetics and functional aspects.

• Progress in Medical Physics
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• v.13 no.3
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• pp.135-138
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• 2002

Fractionated stereotactic radiosurguy (FSRS) requires precise and reproducible patient set up. For these reasons non-invasive mask fixation methods have been used in Linac based FSRS. In this study, we measured and assessed the isocenter reproducibility using a commercial head mask fixation system based on thermoplastic materials. For the verification and the measurement of isocenter deviation a special acrylic brain phantom was designed. The designed phantom has 22 vertical rods and each rod has different lengths. At the end of the 8 rods, the monochromic film is attached and irradiated due to planned target position. Deviations of isocenter were measured separately for each direction. The mean deviation showed 0.4 mm in longitudinal direction, 0.1 mm in the lateral direction, 0.1 mm in the anterior-posterior direction of the treatment couch. The data demonstrates the high accuracy and reproducibility. This study reinforces previous literature published.

• Journal of the korean academy of Pediatric Dentistry
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• v.31 no.4
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• pp.630-635
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• 2004

The etiology of mesiodens is unknown but the most widely accepted theory is the hyperactivity of the dental lamina. Complications of mesiodens are delayed or prevented eruption of maxillary central incisors, displacement or rotation of permanent teeth, crowding of affected region, abnormal diastema or permanent space closure, dilaceration or abnormal root development of permanent teeth, primordial or follicular cyst formation, root resorption of adjacent teeth, eruption into nasal cavity. If mesiodens rotate the maxillary central incisors, space deficiency is not common and relapse is very common. So overcorrection is needed. To prevent the rotational relapse, early treatment, overcorrection, long retention period, properly formed proximal surface, use of coupled force, and surgical techniques have been suggested. The authors present two cases, whose chief complain were severely rotated maxillary incisors by mesiodens, treated by orthodontic and surgical technique and showed good results.