• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제43권3호
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• pp.152-159
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• 2017

Objectives: The aim of this study was to investigate the effects of advancement magnitude and changes in mandibular plane angle on the stability of mandibular advancement. Materials and Methods: This retrospective cohort study evaluated the postoperative stability of mandibular advancement in class II skeletal subjects who underwent bilateral sagittal split osteotomy. Radiographs taken preoperatively, immediately postoperatively and 1 year postoperatively were traced and analyzed using linear and angular measurements. To determine horizontal and vertical relapse, an X-Y coordinate system was established in which the X-axis was constructed by rotating S-N downward by $7^{\circ}$ (approximation of the Frankfort horizontal plane) and the Y-axis was defined as a line perpendicular to the X-axis and passing through the point Sella. For certain reference points including point A, point B, pogonion and menton, the perpendicular distance between each point and both axes was determined and cephalometric variables were recorded as X and Y coordinates. Results: Twenty-five subjects were studied. A significant correlation between the amount of mandibular advancement and relapse in the B point (vertical and horizontal) and the pogonion point was observed (vertical and horizontal, P<0.001). Evaluation of data demonstrated a positive correlation between the mandibular plane angle (SN/ML) change and vertical relapse in the B point (P<0.05). A simple regression model demonstrated that 74% of horizontal relapse and 42.3% of vertical relapse in the B point was related to the amount of mandibular advancement. The receiver operating characteristic test showed that 8.5 mm mandibular advancement is related to a relapse rate of 1 mm or more in the pogonion, vertically or horizontally. Conclusion: The magnitude of mandibular advancement is a stronger surgical predictor for horizontal rather than vertical relapse at the B point. Changes in mandibular plane angle (SN/ML) during surgery affect vertical, but not horizontal relapse at the B point.

• 농촌의학ㆍ지역보건
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• 제36권2호
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• pp.87-100
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• 2011

이 연구는 보건소 금연클리닉에 등록하여 6개월 금연에 성공한 사람들의 장기적인 금연 지속 여부와 재흡연에 영향을 미치는 요인을 파악하기 위하여 실시되었다. 2008년 1월부터 2009년 2월까지 C시 보건소 금연클리닉에 등록하여 6개월 금연에 성공한 920명 중 조사에 응한 남성 159명을 최종 분석 대상으로 하였다. 연구 자료는 금연클리닉 등록카드와 2010년 9월 20일부터 10월 20일까지 실시된 우편설문을 통해 수집되었다. 연구에 포함된 변수는 응답자들의 흡연상태, 인구사회학적 특성, 금연클리닉 등록 당시의 흡연관련 특성, 금연클리닉을 통하여 제공받은 서비스, 건강행태, 건강믿음모형의 구성 변수 등이었다. 연구의 결과는 다음과 같다. 6개월 금연성공자 중 지속적 금연성공자는 57.2%, 중간 흡연자는 17.0%, 재흡연자는 25.8%였다. 재흡연자들의 재흡연 이유는 스트레스가 쌓여서 76.2%, 본인의 의지가 약해서 16.7%, 주위의 유혹에 의해서 7.1%로 나타났다. 응답자의 인구사회학적 특성, 과거의 흡연관련 특성, 제공받은 금연상담서비스, 건강행태 요인 등은 6개월 금연 성공자의 1년 후 재흡연 여부에 유의한 영향을 미치지 못하였으며, 건강믿음모형의 구성요소 중 (1) 흡연으로 인한 질병의 발생 가능성, (2) 흡연으로 야기되는 질환의 심각성, (3) 금연의 건강증진에 대한 도움, (4) 금연으로 인한 스트레스와 사회생활에 대한 장애정도, (5) 자기효능감이 단변량분석에서 재흡연 여부에 유의한 영향을 미치는 것으로 나타났다. 서열 로짓 분석을 시행한 결과 이 중 (4) 금연으로 인한 스트레스와 사회생활에 대한 장애정도, (5) 자기효능감만이 재흡연 여부에 유의한 영향을 미쳤으며, 특히 자기효능감이 매우 중요한 영향을 미치는 것으로 밝혀졌다. 이 연구를 통해 보건소 금연클리닉을 통하여 6개월 금연에 성공한 남성들 중 상당수가 재흡연을 하게 된다는 것을 알 수 있었다. 재흡연자들은 다시 담배를 피우게 된 이유를 스트레스의 증가나 자신의 의지부족 때문이라고 하였으며, 재흡연에 영향을 미치는 요인이 금연자의 인구사회학적 변수나, 과거의 금연습관보다는 심리학적 요인, 특히 자기효능감과 금연과 관련된 인지된 장애임도 밝혀졌다. 이러한 연구결과는 금연클리닉 등록자 중 재흡연 위험이 높은 사람을 선별하여 맞춤식 관리를 하는데 도움을 줄 것으로 기대되며, 금연 클리닉 등록자를 위한 스트레스 해소나 자기효능감 강화 프로그램 개발이 시급함을 시사한다. 이 연구는 일개 중소도시의 금연클리닉 등록자 중 남성만을 대상으로 하였고, 우편조사로 인한 낮은 응답률, 조사 시기에 따른 회상 오차, 금단 증상, 행동계기(cue to action), 금연에 대한 사회적 지지와 같은 변수가 누락되는 등 연구방법론 상에 제한이 있어 연구결과의 일반화에 주의를 요하며, 향후 연구에서는 이러한 문제점을 보완할 필요가 있다.

• 대한치과의사협회지
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• 제37권4호통권359호
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• pp.287-293
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• 1999

Long-term posttreatment stability is great concern to all orthodontist. So, this article was disussed that etiology of relapse, classificatioan of retention, duration of retention and treat after relapse. The most important thing about stability was considered that growth pattern, periodontal remodeling, neuromuscular factors and applied the appropriate mechanotherapy. Retenton was considered during the treatment planning and required considerable analytic thought.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제26권6호
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• pp.636-643
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• 2000

Facial asymmetry is the most frequent disease in craniofacial deformities. And the primary causing area of that is mostly placing in mandible. That is to say, it is known that primarily, mandible grows excessively or deficiently, and other facial region involving maxilla undergoes compensatory growth secondarily, so asymmetric face develops. In facial asymmetry, the surgical correction of undergrowth is more difficult than that of overgrowth and the reason of it is the postoperative relapse caused by stress of surrounding soft tissues. It means the stress of surrounding soft tissues occurring after bone lengthening and reducing above stress is the same meaning with reducing postoperative relapse. Among various areas, mandibular ramus is the most difficult area to lengthen vertically and maintain its length. The reason of it is considered by many authors as the stress of surrounding pterygomasseteric sling which is enveloping lower border of mandible and interrupting elongation of ramal height. So we applied two different surgical procedures in which pterygomasseteric slings have different stress respectively to monkeys which have similar masticatory function and anatomy to human being and compared relapse by radiographic film and observed periodically the histochemical change of masseteric muscle fiber. So we could see the following results. The relapse was less in EVRO group in which we separated pterygomasseric sling in inferior border and didn't approximate muscle sling after vertical lengthening to minimize the stress of soft tissues than IVRO group in which we elongated ramal height preserving pterygomassetric sling. Of course, we could see a problem in EVRO group such as bone resorption in inferior border caused by uncovering the periosteum of inferior border. But we expect that such problem will be solved by developing periosteum substitutes for covering the exposed bone and minimizing the surgical trauma. In histochemical study of masseteric muscle fiber, the fiber constituents of EVRO group in which we minimized soft tissue stress was changed immediately after operation and maintained it for 1 year, whereas that of IVRO group in which we preserved soft tissue stress was changed in more portion after operation and recovered it by 1 year. By the histochemical results, we can see that the recovery of fiber constituents reflect the recovery of muscle stress and it is closely related with relapse phenomenon.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제15권2호
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• pp.123-128
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• 1993

For the purpose of studying postsurgical stability of mandibular prognathism, 18 patients(8 men and 10 women) were selected who underwent sagittal split ramus osteotomy and lateral cephalograms taken preoperatively, immediate postoperatively, and over 6-month follow-up were traced and analysed. The following results were obtained. 1. Average magnitude of setback vas 11.0mm, and aberage relapse was 3.0mm, so the rate of relapse was 27%. 2. Magnitude of mandibular setback contributed to relapse. 3. The patients of less than 10mm setback showed average 10% of relapse rate, and it was of little clinical significance. 4. Proper detachment of pterygomasseteric sling prevention of clockwise rotation of proximal segment and rigid fixation are recommended for the better postoperative stability.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제29권2호
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• pp.95-101
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• 2003

The purpose of this study was to evaluate the patterns of skeletal changes of proximal and distal segments after one jaw surgery and two jaw surgery with posterior impaction using SSRO on mandible in order to determine the skeletal origin of relapse and compare the stability of surgical methods in anterior open bite. The points and lines from lateral cephalometrics were measured before, after surgery, and at least 6-month follow up period. And then, the positional change of the proximal and distal segment were evaluated respectively. The results obtained were as follows; In cases of two jaw surgery, the results were stabler because they had less relapse factors. In cases of one jaw surgery, the value of APD were increased but it didn't relapse to the original value. Both of proximal and distal segments were responsible for the relapse tendency. But in one jaw surgery, the rotation of proximal segment was more responsible, and in two jaw surgery, the rotation of distal segment was.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제22권2호
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• pp.184-190
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• 2000

Objective : To compare two different methods of rigid fixation in postoperative stability after mandibular setback. Material and Methods : 28 patients with Class III malocclusion were treated by bilateral sagittal split ramus osteotomy(BSSRO) and mandibular setback were selected for this study. Group A(n=14) had the bone segments fixed with monocortical miniplate on the lateral side of the mandibular body and Group B(n=14) had three noncompressive bicortical screw inserted at the genial area through a transcutaneous approach. Cephalograms were taken preoperatively, postoperatively within 1 weeks and at a follow-up period (mean 8.9 months after surgery) and the amount of setback and postoperative change were measured. Results : Postoperative relapse between two groups was minimal in setback of the mandible. Statistical analysis showed no significant difference in postoperative relapse. Conclusion : This study suggests that both methods of skeletal fixation investigated give comparable postoperative stability and their use in mandibular setback appears to be a fairly stable clinical procedure .

• Maxillofacial Plastic and Reconstructive Surgery
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• 제18권4호
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• pp.563-569
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• 1996

Skeletal and dental changes were examined in 38 patients of mandibular prognathism who been treated by a bilateral sagittal split osteotomy(SSRO) and internal fixation using titanium mini-screws. All patients were followed up for over 8 months after the surgeries, and postoperative cephalometric measurements were compared at 2 months and at 8 months. Linear measurements of the "Pog-most posterior screws" and angular measurementsts of "SN-Pog'were compared to figure out the change of bony fragments. The significancy of data were tested by unpaired T-test. The results were as follows : 1. The fixation screws were changed in cephalometric position as little as $0.32{\pm}2.51mm$ in SSRO and $0.15{\pm}1.00mm$ in SSRO & Le Fort I Osteotomy.(P<0.05) 2. Mandibular set-back over 5mm resulted in less stability of the fixation screws and higher relapse tendency. 3. The internal fixation using two screws along the inferior border and one on the superior ridge is considered to be very resistant to postoperative relapse of the repositioned bony segments.

• 성인간호학회지
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• 제17권3호
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• pp.474-483
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• 2005

Purpose: This descriptive study was undertaken to explore the distribution of stages of mammography adoption and identify benefits and barriers perceived by women according to the stage of mammography adoption. Methods: A total of 227 women aged between 30 - 60 was selected by the convenient sampling in W city. The instrument developed by the researcher based on the scales of Champion(1993), Champion & Skinner(2003), and Rakowski et al (1992) was used. Results: The distribution of stages of mammography adoption was as following; precontemplation 30.7%, contemplation 23.8%, relapse 20.2%, action 14.4%, and maintenance 10.8%. Women in maintenance and actors showed high scores in benefits and low scores in barriers. Those in relapse reported high scores in both benefits and barriers, while precontemplators and contemplators showed high score in barriers and low scores in benefits. Conclusion: Despite the rate of mammography participation has increased, the proportion of maintenance stage is still low and that of relapse is high. For those in relapse, strategies to eliminate barriers hindering regular and continuous mammography are necessary. For precontemplators and contemplators, detail information including purpose, procedure and benefits of mammography should be given primarily.

• 한국의류학회지
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• 제32권7호
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• pp.1116-1128
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• 2008

The purpose of this study was to investigate the effects of clothing materials on the atopic determatitis of atopic patients. A questionnaire was used as the measurement tool of this study. The survey of questionnaire was performed for atopic patients of 987. For the statistical analysis of data, $X^2$-test and percentage of SPSS were used. In the analysis results of the clothing materials which are both effective and ineffective against atopic determatitis, the results indicate that the most effective clothing materials for atopic determatitis were the those containing natural aroma and the most ineffective clothing materials for atopic determatitis were the those containing nylon. In the difference analysis results of both the relapse materials and the relapse factors for atopic determatitis according to demographic variables, both the relapse materials and the relapse factors for atopic determatitis showed a significant difference according to gender, age, educational background, monthly income, and occupation. Consequently, the results of this study will help develop the clothing materials suitable for atopic patients and lay the foundation for managing atopic determatitis more effectively through the rational choice of clothing of atopic patients.