Background: Implants are becoming the first choice of rehabilitation for tooth loss. Even though they have a high success rate, failures still occur for many reasons. The objective of this study is to analyze the reasons for recurring failure at the same site and the results of re-implantation. Methods: Thirteen patients (11 males and 2 females, mean age 60 ± 9.9 years) who experienced implant surgery failure at the same site (same tooth extraction area) two or more times in the Department of Oral and Maxillofacial Surgery, Seoul National University Bundang Hospital, between 2004 and 2017 were selected. The medical records on a type, sites, diameter, and length of implants; time and estimated cause of failure; and radiographs were reviewed. Data were collected and analyzed retrospectively, and the current statuses were evaluated. Results: A total of 14 implants experienced failure in the same site more than two times. Twelve implants were placed in the maxilla, while 2 implants were placed in the mandible. The maxillary molar area was the most common site of failure (57.1%), followed by the mandibular molar, anterior maxilla, and premolar areas (14.3% each). The first failure occurred most commonly after prosthetic treatment (35.7%) with an average period of failure of 3.8 months after loading. Ten cases were treated as immediate re-implantation, while the other 4 were delayed reimplantation after an average of 3.9 months. The second failure occurred most commonly after prosthetic treatment (42.9%), with an average of 31 months after loading; during the healing period (42.9%); and during the ongoing prosthetic period (14.3%). In 3 cases (21.4%), the treatment plan was altered to an implant bridge, while the other 11 cases underwent another implant placement procedure (78.6%). Finally, a total of 9 implants (64.3%) survived, with an average functioning period of 60 months. Conclusions: Implants can fail repeatedly at the same site due to overloading, infection, and other unspecified reasons. The age and sex of the patient and the location of implant placement seem to be associated with recurring failure. Type of implant, bone augmentation, and bone materials used are less relevant.
Various accidents and injuries are currently occurring in Korea at increasingly high rates. Good quality emergency care service is urgently needed to cope with these various forms of accidents and injuries. In order to develop a sound emergency care system, there need to be a plan to educate and train professionals specifically in emergency care. One solution for the on going problem would be to educate and train emergency clinical nurse specialists. This study on a strategy for curriculum development for emergency clinical nurse specialist was based on the following five content areas, developed from literature related to the curriculum of emergency nursing and emergency care situation : 1. Nurses working in the emergency rooms of three university hospitals were analyzed for six days to identify categories of nursing activities. 2. Two hundreds and eleven nurses working in the emergency rooms of 12 university hospitals were surveyed to identify needs for educational content that should be included in a curriculum for the clinical nurse specialist. 3. Examination of the environment in which emergency management was provided. 4. Identification of characteristics of patients in the emergency room. 5. The role of emergency clinical nurse specialist was identified through literature, recent data, and research materials. The following curriculum was formulated using the above mentioned process. 1. The philosophy of education for emergency clinical nurse specialist was established through a realistic philosophical framework. In this frame, client, environment, health, nursing, and learning have been defined. 2. The purpose of education is framed on individual development, social structure, nursing process and responsibility along with the role and function of the emergency clinical nurse specialist. 3. The central theme was based on human, environment, health and nursing. 4. The elements of structure in the curriculum content were divided to include two major threads, I, e., vertical and horizontal : The vertical thread to consist of the client, life cycle, education, research, leadership and consultation, and the horizontal thread to consist of level of nursing (prevention to rehabilitation), and health to illness based on the health care system developed by Betty Neuman system model. 5. Behavioral objectives for education were structured according to the emergency clinical nurse specialist role and function as a master degree prepared in various emergency settings. 6. The content of the curriculum consisted of three core courses(9 credits), five major courses(15 credits), six elective courses(12 credits) and six prerequisite courses (12 credits). Thus 48 credits are required. Recommendations : 1. To promote tile quality of the emergency care system, the number of emergency professionals, has to be expanded. Further the role and function of the emergency clinical nurse specialist needs to be specified in both the medical law and the Nursing Practice Act. 2. In order to upgrade the qualification of emergency clinical nurse specialists, the course should be given as part of the graduate Program. 3. Certification should be issued through the Korean Nurses Association.
The educational preparation of nurses has been the focus of considerable debate globally. It is needed the change of the basic nursing education for professional nurse to prepare the trends of the health care needs of clients for coming new generation. And also it is believed that educational preparation for being nurses is to be responsible to clients' needs. The purpose of the study was to develop a baccalaureate program in nursing. This study were implemented through three stages from April 2001, to April 2002.: preparation stage which were consisted of reviewing of the literatures, interviewing the fellow nurses in a variety workplace, and consulting professors who were concerned with the nursing education to identify the present educational problems, and analyzing the contents of seven major courses in nursing education, evaluation stage about a new developed curriculum with the directors of the five nursing schools, and confirmation stage of new developed education programme. The developed education programme was designed as a four year program with 126 credit hours including 39 credit hours of liberal arts, 34 credit hours of supplementary courses, and 53 credit hours of nursing major based on the four basic nursing dimensions of human, health, environment and nursing. Nursing majors were consisted of Nursing Ⅰ(oxygenation), Nursing Ⅱ(nutrition elimination), Nursing Ⅲ(activity rest), Nursing Ⅳ(neurologic- endocrine protection), Nursing Ⅴ(fluids electrolytes/sex reproductive), Nursing Ⅵ(psycho-social), Community Health Nursing, Fundamental Nursing, School Health, and Emergency care. This new nursing programme was focused on the nursing education for prevention and rehabilitation nursing care as well as the acute and chronic nursing care at hospital, on the integrated nursing programme to become effective, and the nursing process to encourage the critical thinking. The new education programme focused on the professional nurses who are responsible the nursing ethics, communication skills, and professional beliefs to suit the future trends in health. And also it will be needed for faculties to manage the integrated curriculum, to analyze the contents of each subject, and to communicate with each other before a new education programme apply to their education programme in future. This research was supported by the Han Kok Medical Science Foundation
Face-bow is used to transfer models to the articulator in diagnosing the patient or treating problems associated with occlusion. However, there have been few reports on the reliability of the face-bow procedure and the relationship between the experience of the operator and the reliability of the face-bow procedure. The purposes of this study are to examine the reliability of the face-bow procedure and to evaluate whether the face-bow transferring has any training effect. Nine dentists working at M hospital conducted a face-bow transfer in one patient having a normal dentition and interdental relationship. The procedure was done two times a week for four weeks. The maxillary model was mounted to the articulator every time, then the landmarks on the maxillary right first molar, the maxillary left central incisor, and the maxillary left first molar were measured with a special three-dimensional instrument. These data were input into a computer, and evaluated statistically. The results were as follows ; 1. When examined with ANOVA test, the results were p=0.2040 in maxillary right first molar, p=0.0578 in maxillary left incisor, and p=0.1433 in maxillary left first molar. There was no significant(0< $p{\leq}0.05$). 2. Training 1) The correlation coefficient between trial and rejection was -0.578 when analyzed with T-distribution. The more we tried, the less errors we found. 2) When the S.D. of the first three trials was compared to the S.D. of the last three trials in face-bow transfer, the results showed that the former was larger than the latter in thirty-nine times, and the latter was larger than the former in fifteen times. The more we tried face-bow transfer, the less errors we found. 3. When the S.D. of x, y, z coordinates were examined, the S.D. of x coordinates had the largest measurement in five times, the S.D. of y coordinates had the largest measurement in four times, and the S.D. of z coordinates had the largest measurement in nine times. The possibility which the error can occur in z coordinate was the highest.
This study investigated the mechanical properties of precious metal-ceramic alloy joined by the laser-welding and the soldering compared with the parent metal. Twenty-four tensile specimens were cast in precious metal-ceramic alloy and divided into three groups of eight. All specimens in the control group(group 1) were left in the as-cast condition. Group 2 and 3 were the test specimens, which were sectioned at the center. Eight of sectioned specimens were joined by soldering with a propane-oxygen torch, and the remaining specimens were joined by laser-welding. After joining, each joint diameter was measured, and then tested to tensile failure on an Instron machine. Failure loads were recorded, and then fracture stress(ultimate tensile strength), 0.2% yield strength and % elongation calculated. These data for three groups were subjected to a one-way analysis of variance(ANOVA). Neuman-Keuls post hoc test was then used to determine any significant differences between groups. The fracture locations, fracture surfaces were examined by SEM(scanning electron microscope). The results were as follows: 1) The tensile strength and 0.2% yield strength of the soldered group($280.28{\pm}49.35MPa$, $160.24{\pm}26.67MPa$) were significantly less than both the as-cast group($410.99{\pm}13.07MPa$, $217.82{\pm}17.99MPa$) and the laser-welded group($383.56{\pm}59.08MPa$, $217.18{\pm}12.96MPa$). 2) The tensile strength and 0.2% yield strength of the laser-welded group were about each 98%, 99.7% of the as-cast group. There were no statistically significant differences in these two groups(p<0.05). 3) The percentage elongations of the soldered group($3.94{\pm}2.32%$) and the laser-welded group($5.06{\pm}1.08%$) were significantly less than the as-cast group($14.25{\pm}4.05%$) (p<0.05). 4) The fracture of the soldered specimens occurred in the solder material and many porosities were showed at the fracture site. 5) The fracture of the laser-welded specimens occurred also in the welding area, and lack of fusion and a large void was observed at the center of the fracture surface. However, the laser-welded specimens showed a ductile failure mode like the as- cast specimens. The results of this study indicated that the tensile strengths of the laser-welded joints were comparable to those of the as-cast joints and superior to those of the soldered joints.
구치부 가위교합을 개선하기 위한 여러 방법 중, 교정용 미니임플란트(OMI)와 조합된 Dragon helix를 이용한 방법이 이전에 소개된 바 있으며 이는 간접 골성고정원의 역할이 중요하다. 이에 본 연구에서는 간접골성고정원으로 사용된 OMI의 식립각도에 따라 나타나는 구치부의 치근에 나타나는 응력분포와 OMI의 표면에서의 응력 분포 및 변위를 유한요소 해석으로 비교하고자 하였다. 상악 제1대구치와 상악 제2소구치의 치근 사이에 OMI의 식립 각도를 골 표면에 대하여, $45^{\circ}$, $60^{\circ}$, $90^{\circ}$으로 변화시키면서 최대응력분포와 변위를 관찰하였다. OMI의 식립 각도가 $90^{\circ}$일 때 상악 제1대구치와 상악 제2대구치의 구개 치근첨에 최대응력분포가 나타났고, 상악 제1대구치에서는 협측으로 변위의 양이 가장 적게 나타났으며, 상악 제2대구치에서는 함입 및 구개측으로의 변위량이 가장 크게 나타났다. OMI에서는 식립각도가 감소됨에 따라 최대 응력분포가 나사첨 부분으로 이동되었으며, 그에 따라 OMI의 변위량은 증가하였다. 이상의 결과로 OMI의 식립각도가 $90^{\circ}$일 때 고정원의 역할이 최대가 되었으며, 구치부 가위교합의 개선 효과가 가장 크게 나타남을 알 수 있었다.
Objective: The objective of this research is to quantitatively analyze muscle activities of arm and shoulder, according to direction in various types of one-handed manual material handling, based on surface electromyography. Background: Workers in industrial sites frequently carry out one-handed manual material handling using arm and shoulder muscles. Therefore, chronic load and accumulated fatigue occur to arm and shoulder muscles, which becomes a main cause of upper arm and shoulder musculoskeletal disorders. The shoulder muscles have widely range of motion, and complex interactions take place among various muscles including rotator cuff muscles. In this regard, research on interactions among should muscles, according to such various dynamic motions, is required. Method: Ten male subjects in their 20s participated in this research. This research considered upward, downward, leftward, rightward, forward and backward directions and fourteen muscles around arm and shoulder (biceps brachii and trapezius, etc.) as independent variables. The mean muscle activity was set as the dependent variable. This research extracted $4^{th}{\sim}7^{th}$ repetition signals according to ten times of repetitive muscle contraction, and analyzed the muscle activity concerned using the envelope detection technique. Results: The mean muscle activity of upward direction was analyzed highly statistically significant. The reason is that the effect of gravity works to arm and shoulder muscles. Also, it is conjectured that deformation of coracoacromial ligament was caused, and its contact pressure increased, due mainly to the shoulder flexion, and therefore load was analyzed high. Muscle activity was analyzed significantly low, according to concentric ballistic motion used in the concentric contraction phase by storing elastic energy in the eccentric contraction phase with a motion to bring the weight to the front of subject's body as to downward, leftward and backward directions. Because, elbow joint's flexion-extension motions mainly occurred, biceps brachii was analyzed high muscle activity as the prime mover. Conclusion: The information on the quantitative load of muscles can be applied to ergonomic work design for one-handed manual material handling to minimize muscle load. Application: This research has effectively identified muscle activity according to dynamic contraction by applying an envelope detection technique. The results can be used for ergonomic work design to minimize muscle load during the one-handed manual material handling, according to each direction. The research results are expected to be used for musculoskeletal disorder prevention and physiotherapy in the rehabilitation medical field, based on the muscle load of arm and shoulder in various directions.
Objectives: Strokes have diverse symptoms and signs. One of ten stroke patients has chronic pain after a stroke. Pain after a stroke interrupts rehabilitation and worsens quality of life, but there is no efficient treatment for this pain. This study surveyed and reports on the clinical studies of treatment for chronic pain after a stroke. Methods: We searched journals for reports on clinical studies of treatment for chronic pain after a stroke through the databases OASIS (http://oasis.kiom.re.kr), NDSL (ndsl.kr), Kmbase (http://kmbase.medric.or.kr/), and PubMed (http://www. pubmed.com). The search words were "stroke & pain", "jungpung中風 & pain", "pungbi風痺", "cerebral hemorrhage & pain", and "cerebral infarction & pain". Results: Twenty-nine studies of treatment for chronic pain after a stroke were found. Of these, 15 were randomized controlled trials, 10 were nonrandomized controlled trials, and 4 were "before and after" studies. Treatments were diverse, including acupuncture, electroacupuncture, herbal acupuncture, herbal medicine, and more. The treatment periods were longer than 3 weeks on average. Conclusions: These results show that good quality randomized controlled trials of treatment for chronic pain after a stroke are small in number. We need larger and more diverse studies of treatment for chronic pain after a stroke.
The purpose of this study is to investigate the effects of the practice exercising and cycling on the gait abilities of dementia elderly patients. Forty forty elderly patients with dementia were participants. Participants were divided into three groups as A, B, and C, Group A was a standard group which had been treated with electric treatment, hot pack, and exercise. The second group B had been treated with cycling added to the treatments of group A. Finally, treatments of group C were arranged by subtraction of exercise from those of group A. The test was a 'timed up and go test' used for measuring the rates of the gait ability through four months. The gait ability of each group was measured after each month. The results of this study are as following: 1. After first month, the averages of changes in gait ability of group C, A and B were -1.69, -1.67, and -1.13 seconds respectively. That means that dementia control was achieved significantly in group A and B (p<0.05)whereas it was not in group C. 2. The averages after two months were -4.00 seconds for group C, -2.60 seconds for group A, and -1.56 seconds for B, respectively. All groups acquired significant effects in treating dementia (p<0.05). 3. After three months, -6.38, -3.00 and -2.31 seconds were average values of group C, A and B respectively. Same as results after two months, there were significant effects in all groups (p<0.05). 4. After four months, the averages of changes in gait ability of three groups were -8.00. -3.93 and -3.00 seconds for group C, A and B respectively. In the all patients treated analysis, treatments showed significant results (p<0.05). 5. Compared with each other through four months. three groups testing the timed up and go test showed more efficient in maintaining gait ability, in order of group B. A, and C
목적 : 본 연구는 뇌졸중 환자와 노인 환자를 대상으로 퇴원 시기에 이루어지는 평가도구에 대한 체계적 문헌고찰을 통해 평가 항목과 평가도구들을 분석하여 효율적인 퇴원계획을 위한 기초자료를 제공하고자 한다. 연구방법 : 문헌 선정은 PubMed, Medline Complete(EBSCOhost), Scopus를 사용하여 2009년 1월부터 2018년 12월까지의 온라인 데이터에 등록된 연구를 대상으로 최종 22편의 연구를 선정하였고, 연구 설계 및 퇴원 시 주요 평가영역, 하위영역, 평가도구들을 분석하였다. 결과 : 선택된 연구들의 연구 설계 형태는 기술적 연구가 13편(59.2%)으로 가장 많았다. 퇴원 시 평가 영역은 의학적 상태, 일상생활활동, 삼킴 기능, 감각, 이동성, 인지·지각, 의사소통, 감정상태, 가정환경, 환자의 지식과 퇴원을 위한 준비, 사회적지지, 안녕감 등 12개 영역으로 나타났다. 평가 영역에 따라 사용된 평가도구를 분석한 결과, 가장 높은 빈도의 사용을 보이는 평가도구는 일상생활활동을 평가하는 Barthel Index, Functional Independence Measure, 안녕감을 평가하는 Short Form Health Survey, 이동성을 평가하는 Timed Up and Go test 등으로 나타났다. 결론 : 본 연구를 통해 뇌졸중, 노인 환자의 퇴원 시 이루어지는 다양한 평가 영역과 평가도구의 사용과 제한적이나 여러 영역을 포괄하는 평가도구들을 확인할 수 있었다. 이는 뇌졸중 환자의 퇴원 시 고려되는 평가 영역과 효과적인 평가도구의 선택을 돕고 적절한 퇴원계획 중재와 제안을 위한 포괄적인 평가도구의 개발의 기초자료가 될 것이다.
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