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양동효,권혜진,전성원,김민희,김광현,이순임,이응주,김영관,민봉기,정호정,정미리,최유성,조현재 대한치과의사협회 2023 대한치과의사협회지 Vol.61 No.10
Purpose: To examine the current status and limitations of several healthcare platform cases and develop effective content and models for a public oral health platform through a survey of dentists. Methods: Survey on public platforms was conducted on 362 dentists belonging to the Gyeonggi Dental Association. The survey questions consisted of 4 questions on awareness of recent issues related to platforms, 4 questions on the need for platforms, and 9 questions on essential content for public platforms. Results: In the survey, 77.9% of dentists recognized the importance of public platforms. The main features that should be included in public platforms are "student oral examination function" and "dentist locator function". And 84.3% of respondents answer they would be willing to use a platform with these features. Conclusion: This study emphasizes the need for active participation in public platforms to offset the drawbacks of private platforms.
양동효,이철경 한국공업화학회 2002 한국공업화학회 연구논문 초록집 Vol.2002 No.0
바나듐(V)은 페로바나듐(FeV)의 형태로 철강재에 투입하여 철강의 성질을 향상시키거나 특수강의 제조에 이용되고 있으므로 강수요가 있는 한 FeV의 필요성은 지속될 것이며, 앞으로 항공재료, 전지, 초전도체의 분야에서의 수요 증가로 금속 V 또는 알루미늄-바나듐(AIV) 합금의 제조에도 관심이 커지리라 예상된다. 또한 V는 동(Cu) 및 알루미늄(Al) 합금에 첨가되어서 결정립을 미세화하고 강도와 내식성을 향상시킨다. 그러나 최근 들어 바나듐 광물의 품위가 저하되고 있고, 가격이 인상됨에 따라 바나듐 대체제의 개발이 절실히 요구되고 있다. 예를 들어, V를 함유하고 있는 바나듐 슬래그, 중유회, 폐촉매 등으로부터 V를 V<sub>2</sub>O<sub>5</sub>형태로 회수하는 기술이 개발되어 있다. 그러나 이러한 방법은 V를 회수하는 공정이 복잡하고 단가가 높으며, 철강 첨가제로서 FeV을 제조하기 위해서는 별도의 공정이 필요한 단점이 있다. 따라서 본 연구에서는 저렴하고 간단하고 공정에 의하여 V를 함유하고 있는 석유화학 폐촉매를 재활용하고자 하였으며, 재활용 방법으로 열환원법을 선택하였다. 일반적으로 제강용으로 사용되는 고품위 FeV은 오산화바나듐 정광을 원료로 하고 Al을 탈산제로, Fe을 합금제로 사용하는 알루미늄 열환원법으로 제조하고 있다. 본 연구에서도 Al 열환원법에 의하여 FeV을 제조하는 연구를 수행하였으며, V의 회수율 및 품위를 극대화할 수 있는 최적 조건을 도출하였다. V 정광 실험결과를 바탕으로 V 정광에 폐촉매를 5~40wt% 첨가하였을 때. Al 열환원 거동 및 V 회수율을 조사하였다. Al과 Fe의 첨가량이 증가함에 따라 V의 회수율은 증가하였으며, Al의 산화로 생성되는 Al<sub>2</sub>O<sub>3</sub>에 대한 몰 기준으로 CaO을 100% 첨가하였을 때, V 회수율이 최대가 되었다.
Psychosocial Impact of Chronic Orofacial Pain
양동효,김미은,Yang, Dong-Hyo,Kim, Mee-Eun Korean Academy of Orofacial Pain and Oral Medicine 2009 Journal of Oral Medicine and Pain Vol.34 No.4
The aim of the study was to evaluate psychosocial impact of non-dental chronic orofacial pain (OFP) on daily living using the graded chronic pain (GCP) scale. It is also investigated the clinical profile such as demographics, event related to initiation of OFP and prior treatments for patients. During previous 6 months since September 2008, 572 patients (M:F=1:1.5, mean age=34.7 years) with non-dental OFP attended university-based specialist orofacial pain clinic (Dankook University Dental Hospital, Cheonan) to seek care although 63% of them already experienced related treatment for their OFP problem. They visited the most frequently general dental practitioner and orthopedic doctors due to their pain problem and medication was the most commonly employed modality. Most of the patients (89.2%) had TMD and the most common related event to initiation of their pain was trauma, followed by dental treatment. Almost half of the patients (46%) suffered from chronic pain(${\geq}6\;M$) and 40% of them exhibited relatively high disability due to chronic OFP. GCP pain intensity and disability days were significantly different for age and diagnosis (p<0.05) but not for gender and duration. GCP grades were affected by all the factors including gender, age, pain duration and diagnosis.(p=0.000) Female gender, elders, and long lasting pain were closely related to high disability. The patients with neuropathic Pain and mixed OFP rather than TMD were graded as being highly disabled. Conclusively, a considerable percentage of chronic OFP patients reports high pain-related disability in their daily, social and work activity, which suggest a need for psychosocial support and importance of earlier referral for appropriate diagnosis and tailored management.
Occlusal Analysis of the Patients with Temporomandibular Disorders Using T-Scan II System
양동효,이원섭,김미은,Yang, Dong-Hyo,Lee, Won-Seop,Kim, Mee-Eun Korean Academy of Orofacial Pain and Oral Medicine 2007 Journal of Oral Medicine and Pain Vol.32 No.1
Correlation between occlusal contact pattern and TMD have been hypothesized and partially investigated but results are controversial and not conclusive. The purposes of this study were to compare right-to-left difference of occlusal contact pattern, through contact points, contact force and occlusal balance, in the patients with unilateral TMD and also to evaluate its change related with TMD treatment. 36 patients with unilateral TMD from Department of Oral Medicine in Dankook University Dental Hospital were selected in this study (M:F=7:29, mean age of $29.2{\pm}14.8$ years). A computerized T-Scan II system (Tekscan, INC., USA) was employed for occlusal analysis and the simultaneity and occlusal balance through the number of tooth contact and magnitude of contact force were determined before and after TMD treatment. The number of contact points and contact force was more on the unaffected side than the affected side before treatment (p=0.056 and p=0.060, respectively) while significant difference between both sides was not found after treatment. The number of contact points and contact force on the affected sides significantly increased after treatment (p=0.038 and p=0.052), but the unaffected sides exhibited no significant difference between before and after treatment. In addition, sides difference in relative contact force decreased from about 27% to about 12% after TMD treatment (p=0.001). According to the results of this study, it is likely that unilateral TMD impairs right-to-left occlusal balance and that conservative TMD treatment alleviates the imbalance, subsequently leading to more symmetrical occlusal condition with increased contact points and force.