• Archives of Plastic Surgery
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• 제43권2호
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• pp.204-209
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• 2016

Temporal hollowing occurs to varying degrees after pterional craniotomy. The most common cause of temporal hollowing is a bony defect of the pterional and temporal regions due to the resection of the sphenoid ridge and temporal squama for adequate exposure without overhang. The augmentation of such bony defects is important in preventing craniofacial deformities and postoperative hollowness. Temporal cranioplasty has been performed using a range of materials, such as acrylics, porous polyethylene, bone cement, titanium, muscle flaps, and prosthetic dermis. These methods are limited by the risk of damage to adjacent tissue and infection, a prolonged preparation phase, the possibility of reabsorption, and cost inefficiency. We have developed a method of temporal augmentation using a calvarial onlay graft as a single-stage neurosurgical reconstructive operation in patients requiring craniotomy. In this report, we describe the surgical details and review our institutional outcomes. The patients were divided into pterional craniotomy and onlay graft groups. Clinical temporal hollowing was assessed using a visual analog scale (VAS). Temporal soft tissue thickness was measured on preoperative and postoperative computed tomography (CT) studies. Both the VAS and CT-based assessments were compared between the groups. Our review indicated that the use of an onlay graft was associated with a lower VAS score and left-right discrepancy in the temporal contour than were observed in patients undergoing pterional craniotomy without an onlay graft.

• 한국전문물리치료학회지
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• 제24권4호
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• pp.68-76
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• 2017

Background: Abdominal bracing exercise (ABE) and abdominal hollowing exercise (AHE) improve the lumbar flexibility and pulmonary function in various patients, yet the efficacy of ABE or AHE have not yet been evaluated. Objects: The purpose of this study was to compare the lumbar flexibility and pulmonary function during both ABE and AHE in healthy adults. Methods: The study included 40 healthy adults, who were randomly divided into the experimental group and control group, each with 20 subjects. All subjects performed ABE (experimental group) and AHE (control group). The lumbar flexibility such as trunk flexion test (sitting and standing position) and schober test and pulmonary function such as the spirometer including forced vital capacity (FVC) and force expiratory volume in one second ($FEV_1$) and chest circumference measurement (middle and lower chest) were measured, respectively. Two-way repeated analysis of variance was used to compare the lumbar flexibility and pulmonary function, respectively. Results: No significant effects of lumbar flexibility were observed on trunk flexion test from the sitting position (P=.478) and standing position (P=.096) in the ABE than in the AHE. However, the length of ABE was longer significantly than it of AHE (P=.024). No significant effects of lung function were observed on the FVC (P=.410) and $FEV_1$ (P=.072) in the ABE group than in the AHE group. And also, no significant effects of chest circumference measurement were observed on the inspiration (P=.468) and expiration (P=.563) in middle chest circumference and inspiration (P=.104) and expiration (P=.346) in lower chest circumference. Conclusion: This study indicated that the ABE is only more effective in lumbar flexibility by lumbar length difference than AHE in healthy adults.

• Archives of Plastic Surgery
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• 제45권1호
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• pp.69-73
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• 2018

Background Temporal hollowing is inevitable after decompressive craniectomy. This complication affects self-perception and quality of life, and various techniques and materials have therefore been used to restore patients' confidence. Autologous fat grafting in postoperative scar tissue has been considered challenging because of the hostile tissue environment. However, in this study, we demonstrate that autologous fat grafting can be a simple and safe treatment of choice, even for postoperative depressed temporal scar tissue. Methods Autologous fat grafting was performed in 13 patients from 2011 to 2016. Fat was harvested according to Coleman's strategy, using a tumescent technique. Patient-reported outcomes were collected preoperatively and at 1-month and 1-year follow-ups. Photographs were taken at each visit. Results The thighs were the donor site in all cases for the first procedure. The median final volume of harvested fat was 29.4 mL (interquartile range [IQR], 24.0-32.8 mL). The median final volume of fat transferred into the temporal area was 4.9 mL on the right side (IQR, 2.5-7.1 mL) and 4.6 mL on the left side (IQR, 3.7-5.9 mL). There were no major complications. The patient-reported outcomes showed significantly improved self-perceptions at 1 month and at 1 year. Conclusions Despite concerns about the survival of grafted fat in scar tissue, we advise autologous fat grafting for patients with temporal hollowing resulting from a previous craniectomy.

• 대한통합의학회지
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• 제7권2호
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• pp.121-131
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• 2019

Purpose : Lower back pain is a common disorder experienced by approximately 90-% of the population at least once in a lifetime. This study examines changes in the thicknesses and ratios of the deep and superficial fibers of the multifidus according to the lumbar stabilization exercise used for spinal stabilization. Methods : Ten different lumbar stabilization exercises were implemented by 20 healthy men in random order, and the thickness of multifidus muscle was measured ultrasound image during each exercise. Results : The surface muscle fibers of the multifidus muscles significantly increased in the exercise method in which the arms and legs were lifted (p<.05), while the deep muscle fibers of the multifidus muscles increased significantly in the exercise in which the arms and legs were not lifted (p<.05). The ratio of the thickness of surface muscle fibers to the total thickness of muscle fibers was higher in the exercise method in which the arms and legs were lifted (p<.05), while the ratio of the thickness of deep muscle fibers to the total thickness of muscle fibers was higher in the hollowing and bracing exercise method in which the arms and legs were not lifted (p<.05). Conclusion : When lumbar stabilization exercise should be performed at clinics to strengthen the deep muscle fibers of the multifidus muscles that have larger effects on the stability of spinal segments, taking the stability of the spine into consideration indicates that, hollowing and bracing exercise methods that do not that cause isotonic extension to the spine are appropriate.

• 대한두개안면성형외과학회지
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• 제23권4호
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• pp.178-182
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• 2022

Postoperative temporal hollowing is a common complication of craniotomy. Damage and repositioning of the temporalis muscle can lead to a depression in the temporal side of the skull with inferior bulging, worsening aesthetic outcomes. We report a case of cranioplasty with three-dimensional (3D) printed mesh involving an additional correction using a temporalis muscle sling to help address this problem. A 3D-printed bioabsorbable mesh was prepared based on preoperative facial computed tomography, and was fixed to the hollowed area for tissue augmentation. The temporalis muscle was elevated and fanned out to its original position, and a sling was attached to a screw that was fixed to the mesh. For reinforcement, an additional sling was attached to another screw fixed to the mesh 2-3 cm vertically above the first screw. Aesthetic results were confirmed immediately after surgery and later during outpatient follow-up. Both depression and lateral bulging were resolved, and there was no delayed drooping of the temporalis muscle on 6-month follow-up. There were no complications, and the patient was satisfied with the appearance. This is a simple yet effective technique with a low risk of complications, and should be considered for postoperative temporal hollowing patients, especially those with severe lateral bulging.

• 한국산업융합학회 논문집
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• 제25권6_3호
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• pp.1303-1313
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• 2022

Modern cities need to revitalize the downtown area, which is declining due to population decline, economic recession, and deterioration of the residential environment, economically, socially, and physically by introducing and creating new functions. In addition, the hollowing out of the existing city center is getting worse due to the development of the outskirts of the city. Therefore, the discussion for the development of urban regeneration is the core task of modern cities. This study analyzed based on a basic understanding of urban regeneration projects, and through this, the problems of domestic urban regeneration projects were derived. In addition, the problem factors and major improvement plans of the urban regeneration project were analyzed from the expert's point of view using the AHP analysis technique. Based on this, the purpose is to present policy alternatives for the future development of urban regeneration projects. The problems derived to present the policy alternatives and improvement directions of the urban regeneration project were classified into problems related to goal achievement, problems related to the business itself, and problems related to project results. It was subdivided into sub-categories. This study analyzed the problem factors and major improvements from the expert's point of view by using the AHP analysis technique for the problems of the urban regeneration project. Based on the AHP analysis results and experts' opinions, five policy alternatives for the development of urban regeneration projects were presented.

• 기술혁신연구
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• 제6권2호
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• pp.54-79
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• 1998

Entering the 1990s, Korean economies experienced the high-cost and low-efficiency situation which evetually caused many Korean firms led to relocate their production facilities to lower labor cost countries. This paper aims to draw out the characteristics of FDI and to evaluate the impacts of FDI in manufacturing sectors. Firstly, we try to categorize the indutries into three groups, labor intensive, capital intensive, and the technology intensive industries figuring out the characteristics of FDI of Korean firms. Secondly, we compare the three categories by grouping high and low foreign investment areas using value added data. Thirdly, we analyse the impacts of foreign production relocation the number of firms, production volume and jobs creation in Korea during the period 1991-1996. This paper concludes that the FDI of Korean firms concentrates to labor intensive industry and the hollowing effect caused by FDI was observed partially in the labor intensive industry.

• The Journal of Advanced Prosthodontics
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• 제4권4호
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• pp.248-253
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• 2012

Maxillary obturator prosthesis is the most frequent treatment option for management of partial or total maxillectomy. Heavy weight of the obturators is often a dislocating factor. Hollowing the prosthesis to reduce its weight is the well established fact. The alternate technique to hollow-out the prosthesis has been described in this article which is a variation of previously described processing techniques. A pre-shaped wax-bolus was incorporated inside the flasks during packing of the heat-polymerized acrylic resin to automatically create the hollow space. The processing technique described is a single step flasking procedure to construct a closed-hollow-obturator prosthesis as a single unit. To best understand the technique, this article describes management of a patient who had undergone partial maxillectomy secondary to squamous cell carcinoma rehabilitated with a hollow-obturator prosthesis.

• 한국정보시스템학회지:정보시스템연구
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• 제31권2호
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• pp.179-196
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• 2022

Purpose The purpose of this study is to examine what expectations and mediating factors are needed as variables necessary for the intention to use logistics hollowing out, and at the same time, what factors strengthen medical SCM competitiveness. In order to develop competitive competency variables for medical institutions that affect the intention to use logistics cavitation, we would like to examine the key success factors applying AHP model analysis. Design/methodology/approach For AMOS analysis, we conducted an online survey of four universities and analyzed 212 samples. The analysis method used SPSS, and AMOS. We proposed several factors categorized as reliability, SCM advance, and scalability. Findings The results showed that all proposed variables (competitive competencies for HSCM, expected performance) had a significant impact on intention of physical distribution cooperation. According to the measurement methods proposed in this study, key success factors for strengthening the capacity of HSCM can increase the need for physical distribution cooperation through expected performance.

• 노동경제논집
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• 제38권3호
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• pp.53-95
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• 2015

본 논문은 노동시장의 숙련도별 일자리 구조를 Autor-Dorn의 직업-숙련도 분류시스템을 준용 분석하여 중숙련 일자리의 감소와 함께 고 저숙련 일자리가 동시에 증가하는 양극화 현상이 뚜렷함을 확인하였다. 동 현상은 근로자의 산업간 이동 요인이 크고 노령근로자가 중 저숙련 일자리로 밀려나고 있다는 독특한 특징을 나타냈으며, 추세적 경향과 함께 경기수축기에 가속화되는 경기변동성 또한 가지고 있었다. 따라서 이러한 중숙련 일자리의 감소 속도가 지금보다 현저히 완화되는 경우 고용 없는 경기회복의 모습도 상당히 개선될 수 있음을 알 수 있었다.