• 한국노년학
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• 제37권4호
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• pp.909-924
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• 2017

본 연구는 65세 이상 노인을 대상으로 실시한 "2014년 노인실태조사"의 전국 조사 자료를 활용하여 한국 노인의 저작능력이 인지기능에 미치는 영향을 파악하고 신체기능과 우울의 매개효과를 확인하기 위한 이차자료 분석연구이다. 본 연구는 "2014년 노인실태조사"자료의 응답자 총 10,451명을 대상으로 하였으며 자료수집기간은 2014년 6월 11일~2014년 9월 4일까지였다. 본 연구에서 저작능력은 일상생활 불편감 중 씹기(고기나 딱딱한 것) 능력에 관한 도구를 이용하였으며, 인지기능은 MMSE-DS, 신체기능은 K-IADL, 우울은 SGDS-K 도구를 이용하여 측정하였다. 본 연구에서 수집된 자료는 SPSS 24.0프로그램과 Process Macro를 이용하여 분석하였고, 저작능력이 인지기능에 미치는 영향에 대하여 신체기능과 우울의 매개효과와 이중매개효과 검정은 Hayes(2013)의 Bootstrapping 방법에 기반한 Process Macro를 이용하여 분석하였다. 본 연구결과, 첫째, 대상자의 저작능력이 인지기능에 미치는 총 효과(p>.05)와 직접효과(p>.05)는 유의하지 않은 것으로 나타났다. 둘째, 대상자의 저작능력은 신체기능을 단일 매개하여 인지기능에 미치는 완전매개 효과(p<.05)가 있는 것으로 나타났다. 셋째, 대상자의 저작능력은 우울을 단일 매개하여 인지기능에 미치는 완전매개 효과(p<.05)가 있는 것으로 나타났다. 넷째, 대상자의 저작능력이 신체기능과 우울을 이중 매개하여 인지기능에 미치는 완전매개 효과(p<.05)가 있는 것으로 나타났다. 이롤 통해 본 연구는 한국노인의 인지기능 저하를 예방하기 위해서는 저작능력을 강화하고, 신체기능을 독립적으로 유지하고 우울을 예방하기 위한 프로그램 개발이 필요하고, 포괄적 노인건강사정 시 노인의 인지기능 저하에 영향을 주는 직, 간접적 요인을 주기적으로 모니터링 하는 체계적 전략이 필요함을 시사해 주었다.

• The Journal of Advanced Prosthodontics
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• 제8권3호
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• pp.187-193
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• 2016

PURPOSE. This pilot study was to find the influence of complete denture on the brain activity and cognitive function of edentulous patients measured through Electroencephalogram (EEG) signals. MATERIALS AND METHODS. The study recruited 20 patients aged from 50 to 60 years requiring complete dentures with inclusion and exclusion criteria. The brain function and cognitive function were analyzed with a mental state questionnaire and a 15-minute analysis of power spectral density of EEG alpha waves. The analysis included edentulous phase and post denture insertion adaptive phase, each done before and after chewing. The results obtained were statistically evaluated. RESULTS. Power Spectral Density (PSD) values increased from edentulous phase to post denture insertion adaption phase. The data were grouped as edentulous phase before chewing (EEG p1-0.0064), edentulous phase after chewing (EEG p2-0.0073), post denture insertion adaptive phase before chewing (EEG p3-0.0077), and post denture insertion adaptive phase after chewing (EEG p4-0.0096). The acquired values were statistically analyzed using paired t-test, which showed statistically significant results (P<.05). CONCLUSION. This pilot study showed functional improvement in brain function of edentulous patients with complete dentures rehabilitation.

• 구강회복응용과학지
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• 제28권3호
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• pp.269-276
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• 2012

임플란트 보철물의 저작능력과 관련되어 다양한 요인들이 존재하며 여기에 관해 다양한 연구가 이루어지고 있지만 대부분의 후향적 연구에서는 임플란트 저작력이 다른 유형의 보철물과 비교해서도 우수한 것으로 결론 내리고 있다. 그러나 임상적으로 임플란트 보철치료 후에 저작능력에 대해 만족하지 못하는 환자들이 간혹 있으며 이러한 저작의 불만족을 유발할 가능성이 있는 여러 가지 원인들 중 신경학적 원인에 대해 고찰해 보고자 한다. Pubmed database에서 Implant chewing ability, masticatory ability 등의 임플란트 저작과 관련된 검색어를 사용하여 검색 후 임플란트 보철물의 저작능력에 관련된 요인들 및 임상과 관련된 논문들을 선택하고 고찰하였다. 저작능력에 관한 정의, 저작능력에 관련된 요인들에 대해 고려하였으며 이러한 요인들 중 신경학적 원인과 관련된 내용을 분석 평가하였다. 치주인대(Periodontal Ligament: PDL)의 기계적감각수용기(Mechanoreceptor)는 저작운동 시 치아로부터 얻은 정보를 뇌간으로 전달하여 저작운동의 조절에 관여한다. 임플란트의 경우 치주인대의 부재로 인해 저작운동 시 저작운동 적응 능력이 떨어지며 특히 딱딱한 음식을 저작 시 이러한 현상이 두드러진다. 저작근, TMD의 mechanoreceptor 또한 저작운동에 관여하기 때문에 치주인대의 기계적감각수용기 부재를 보상할 가능성도 있으며 임플란트 주변 조직에 있는 nerve fiber가 감각능력에 관여할 수 있을 가능성에 대한 보고도 있으니 이에 대한 추가 연구가 더 필요할 것으로 사료된다.

• 한국치위생학회지
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• 제21권4호
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• pp.383-391
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• 2021

Objectives: Based on the 7th National Health and Nutrition Examination Survey 1,135 adults aged 19 years were selected as the final study subjects to investigate the relationship between oral health and chewing difficulty in adults. Methods: Frequency analysis, chi-square test, and logistic regression analysis were performed for general characteristics, oral health behaviors, awareness symptoms, and oral health using SPSS Program 21.0. Results: Regarding factors related to chewing difficulty, the oral health was 0.44 times lower than the average level and 0.28 times lower than the good condition. In the case of oral examination, chewing difficulty was 0.85 times lower. The speaking problem was 0.11 times lower in usually than inconvenient and 0.06 times lower in not inconvenient. In the case of un-treatment, it was 0.40 times lower than that in the case of treatment. The chewing difficulty was significantly higher by 2.09 times in the case of experience of tooth pain and 1.36 times in the case of periodontal disease. Conclusions: Based on the above results, it is thought that prevention and treatment are actively needed to identify factors of oral health to improve oral health, to solve chewing difficulty and to improve chewing function.

• 대한치과보철학회지
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• 제32권4호
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• pp.565-572
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• 1994

According to the classification of dental arch form and the analysis of patterns of chewing movement, the patterns of chewing movement in each group were evaluated and compared with those of the normal group. Results were summarized as follows ; 1. Opening phase in chewing movement In the group which the maxillary second molar positionsbuccal side, the chewing patterns which have the Vertical Guide Openings in frontal plane, the Posterior Guide Openings in hjorizontal plane were observed. In the group which the maxillary premolars position lingual side, the chewing paterns which have the Protrusive Shift Openings in horizontal plane and sagittal plane were observed. 2. Closing phase in chewing movement. In each group except for the normal group, the chewing patterns which have the Concave Closure in frontal plane and in Horizontal plane were observed. In the group which the maxillary premolars position buccal side, the chewing patterns which have the Lateral Guide Closure in frontal plane and in horizontal plane, the Vertical Guide Closre in sagittal plane were observed: From the results, as the characteristics of the dental arch form have appeared in chewing movement, the close relationships were found between dental arch form and chewing movement. It is suggested that the evaluation of dental arch form is effective in the diagnosis of function of stomatognathic system.

• 한국치위생학회지
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• 제20권3호
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• pp.281-290
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• 2020

Objectives: Stress is the cause of several illnesses, in older people, stress may also cause various social problems. The oral health of older adults is closely related to the quality of life, and chewing ability is particularly important for their general health. The purpose of this study was to investigate the relationship between stress, the number of teeth remaining, and the chewing ability, which reflects the oral health status among older adults. Methods: This study evaluated the stress level and chewing ability of adults older than 65 years using the 6th (2014-2015) Korea National Health and Nutrition Examination data. The total number of remaining teeth was determined based on the data of the teeth conditions. Results: There was an association between stress and chewing ability among older adults. The odds ratio of chewing function increased by 2.67 times (crude OR=2.67; 95% CI=1.88-3.79) with increased stress. After adjusting, the odds ratio increased to 2.74 times (adjusted OR=2.74; 95% CI=1.88-3.98). Conclusions: Reducing stress may facilitate effective oral health management and improve the overall quality of life in older adults. The findings of this study may help in the discovery of various approaches s to reducing stress in older adults and provide relevant information for oral health education.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2003년도 춘계학술대회 논문집
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• pp.1316-1319
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• 2003

The micromovements and stress distributions of cancellous bone in dental implant system play important roles in evaluating chewing function of an implant system. The micromovements and stress distributions in dental implant system generally depend on the chewing force and bone properties. Three dimensional nonlinear finite element analysis has been employed to investigate this issue quantitatively. Chewing forces and bone properties are classified into several groups and three types of implants involving one classical cylindrical type and two expandable implants are investigated in this paper.

• 대한치과보철학회지
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• 제27권2호
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• pp.37-52
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• 1989

The purpose of this study was to investigate the relationship between sternocleidomastoid (SCM) and masseter muscles during occlusal functions by means of EMG recordings of examined muscles. For the study, eighteen normal subjects were selected and the Bio-electric Processor EM2 (Myo-tronics Research, Inc., U.S.A.) with the surface electrodes was used to record the EMG activity from the right and left middle of masseter and insertion of SCM of each subject during right and left gum-chewing and isometric contraction by changing the biting force at right eccentric position of jaw. The amount of biting force ranged from 5 to 70kg during isometric contraction were measured by use of Jaw Force Meter. (Nihon Koden Kogyo, Japan.) The results were as follows: 1. The activity onset of SCM and masseter on the same side was almost at the same time, and integrated EMG values of two muscles on the chewing side were higher than the same named muscles on the non-chewing side during gum-chewing. (p<0.01) 2. The regression correlation was not present between both masseters (p>0.05), but between both SCM muscles or muscles of two kinds on the chewing or non-chewing side. ($p{\leqq}0.05$) 3. The integrated EMG value of SCM on chewing or non-chewing side were about 10 percent of that of ipsilateral masseter. 4. Mean voltage of each examined muscles were almost proportional to biting force during isometric contraction and the slope of voltage/biting force line was steepest at the ipsilateral masseter, followed by contalateral masseter, ipsi- and contra-lateral SCM muscles. 5. Mean voltage of ipsilateral masseter was highest during isometric contraction, followed by ipsilateral masseter, contra- and ipsi-lateral SCM muscles.

• 대한치과보철학회지
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• 제33권4호
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• pp.718-730
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• 1995

This study was performed to measure the mandibular movement and the changes of masicatory and sternocleidomastoid muscle activity reflected by occlusal disturbance during habitual chewing. For this study, 18 subjects(14 males and 4 females with an average age of 24.0) were selected. The impression of each subject were taken for measuring intermolar distance on lower dentition. The activities of masticatory and sternocleidomastoid muscle and the mandibular movement were recorded and analyzed during habitual chewing by means of E.M.G.(electromyograph), E.G.N.(electrognathograph), rotate program in BioPak analyzing system(BioResearch Inc.). The results were as follows : 1. In EMG of the mandibular rest position, the mean value of muscle activites were increased by nocleidomastoid muscle and anterior belly of digastric muscle(0.05

• Journal of Oral Medicine and Pain
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• 제30권1호
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• pp.45-55
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• 2005

오른손잡이와 왼손잡이가 있듯이 저작도 주로 사용하는 쪽이 있는 편측저작습관자와 양쪽을 다 사용하는 비편측저작자가 있다. 본 연구는 1년 이상 지속된 편측저작습관이 저작근과 턱관절에 미치는 영향을 알아보고자, 연세대학교 치과대학 재학생 및 치과병원 교직원 중 참여하기를 희망하는 편측저작습관자 46명, 비편측저작습관자 36명, 총 82명의 지원자를 대상으로 저작근의 근활성도와 교합력을 검사하여 다음과 같은 결과를 얻었다. 연구에 앞서 설문 및 임상검사를 통하여 연구에 영향을 끼칠 수 있는 특기할 전신병력이나 불규칙한 치열 및 비정상적인 교합을 가진 자는 배제하였다. 1. 편측저작습관자군에서 안정위와 최대 이악물기(maximal voluntry contraction; MVC)상태에서의 저작측과 비저작측간 근활성도는 차이를 나타내지 않았다 (p>0.05). 2. 안정위 시 전측두근과 교근에서의 근활성도 비대칭 지수는 편측저작습관자군과 비편측저작습관자군 사이에 차이를 나타내지 않았다(p>0.05). 3. 최대 이악물기 시 교근의 근활성도 비대칭 지수는 편측저작습관자군에서 비편측저작습관자군 보다 높게 나타났으며 (p<0.05), 전측두근의 근활성도 비대칭 지수는 편측저작습관자군과 비편측저작습관자군간에 차이를 나타내지 않았다(p>0.05). 4. 편측저작습관자군에서 저작측과 비저작측간의 평균교합력과 교합접촉면적은 차이를 나타내지 않았다(p>0.05). 5. 편측저작습관자군과 비편측저작습관자군간의 평균교합력의 비대칭 지수와 교합접촉면적의 비대칭 지수는 차이를 나타내지 않았다(p>0.05). 이상의 연구결과 편측저작습관은 저작근의 근활성도와 평균교합력 및 교합접촉면적에 영향을 미쳐 변화를 일으키기 보다는, 정상적인 기능을 하는 생리적 비대칭이라고 보는 것이 타당하다고 생각한다. 향후 연구 시 편측저작자와 비편측저작자를 구분하기위한 객관적인 기준의 제시가 필요하다고 생각한다.