• 보건행정학회지
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• 제25권2호
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• pp.107-117
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• 2015

Background: The purpose of this study is to analyze the cost for the denture treatment in accordance with the government's plan to expand the National Health Insurance coverage for dental prothesis from July 1, 2012. Methods: We developed the draft of classification of the treatment activities based on the existing researches and expert's review and finalized the standard procedures through confirming by Korean Dental Association. We also made the list of input at each stage of treatments. We conducted survey of 100 dental clinics via post from April 4 to May 20 in 2011 and 37 clinics took part in the survey. The unit of cost calculation is the process from the first visit for denture treatment to setting of denture and adjustment. The manufacturing process performed by dental technician was not included in the cost analysis. Results: The process for the complete denture treatment was classified with 10 stages. The partial denture treatment was classified with 8 stages. The treatment time per each denture is about 5.6 hours for complete dentures and about 6.6 hours for partial dentures. The treatment cost were from 591,108 won to 643,913 won for complete denture and from 670,219 won to 738,840 won for partial denture in 2011, depending on the location, type of the clinics and the types of physician's income. Conclusion: This study shows the example of cost analysis for the treatment to set the fee schedule. Measures to get representative and accurate information need to be made.

• 대한치과재료학회지
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• 제44권1호
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• pp.69-77
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• 2017

The aim of this study was to investigate the effects of chitosan powder addition on the strengthening of conventional glass ionomer cement. Two types of chitosan powders with different molecular weight were mixed with conventional glass ionomer cement (GIC): low-molecular weight chitosan (CL; 50~190 kDa), high-molecular weight chitosan (CH; 310~375 kDa). The chitosan powders (CL and CH) were separately added into the GIC liquid (0.25-0.5 wt%) under magnetic stirring, or mixed with the GIC powder by ball-milling for 24 h using zirconia balls. The mixing ratio of prepared cement was 2:1 for powder to liquid. Net setting time of cements was measured by ISO 9917-1. The specimens for the compressive strength (CS; $4{\times}6mm$), diametral tensile strength (DTS; $6{\times}4mm$), three-point flexure (FS; $2{\times}2{\times}25mm$) with flexure modulus (FM) were obtained from cements at 1, 7, and 14 days after storing in distilled water at $(37{\pm}1)^{\circ}C$. All mechanical strength tests were conducted with a cross-head speed of 1 mm/min. Data were statistically analyzed by one-way ANOVA and Tukey HSD post-hoc test. The mechanical properties of conventional glass ionomer cement was significantly enhanced by addition of 0.5 wt% CL to cement liquid (CS, DTS), or by addition of 10 wt% CH (FS) to cement powder. The CL particles incorporated into the set cement were firmly bonded to the GIC matrix (SEM). Within the limitation of this study, the results indicated that chitosan powders can be successfully added to enhance the mechanical properties of conventional GIC.

• 대한치위생과학회지
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• 제5권1호
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• pp.13-19
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• 2022

Background: In this study, zirconia copings were fabricated by setting clinically acceptable inner values for prostheses using computer-aided design/computer-aided manufacturing (CAD/CAM). The processed copings were evaluated for the marginal and internal fit of each abutment shape with a CAD program using the silicone replica technique. Methods A total of 20 copings was produced by selecting models commonly used in clinical practice. After injecting the sample, the minimum thickness, internal adhesion interval, and distance to the margin line were set to 0.5, 0.05, and 1.00 mm using a dental CAD program, respectively. It was measured using a 2D section function in a three-way program of the silicon replication technology. Although the positions and number of measurements of the anterior and posterior regions differed, nine parts of each pre-tube were designated and measured by referring to a previous study to compare the two samples. Results As a result, the average margin of the mesial, distal, and buccal (labial) surfaces was 59.90 ㎛ in the anterior region and 60.40 ㎛ in the posterior region. The mean axial wall margin was 67.25 ㎛ in the anterior region and 69.25 ㎛ in the posterior region. In occlusion, the anterior teeth (77.70 ㎛), posterior teeth (77.60 ㎛), and both anterior and posterior regions were within the clinically acceptable range. Conclusion The edge and inner fit of zirconia coping manufactured using the CAD/CAM system showed clinically applicable results. To reduce errors and increase accuracy, materials and machine errors that affect the manufacture of prosthetics should be investigated. Based on our results, the completeness of prosthetics could increase if the inner value and characteristics of the material are adjusted when applied in clinical practice.

• Restorative Dentistry and Endodontics
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• 제45권4호
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• pp.42.1-42.9
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• 2020

Objective: This study aimed to examine the physical properties (pH and flow) of 2 novel bioceramic sealers. Materials and Methods: The tested sealers were a calcium hydroxide sealer (Sealapex) and 2 bioceramic sealers (BioRoot RCS and TotalFill BC Sealer). Flow measurements were conducted according to ISO 6876/2012, with a press method of 0.05 mL of sealer. The pH of fresh samples was tested immediately after manipulation, while set samples were stored for 3 times the recommended setting time. The predetermined time intervals ranged from 3 minutes to 24 hours for fresh samples and from 10 minutes to 7 days and 4 weeks for the set samples. Analysis of variance was performed, with p = 0.05 considered indicating significance. Results: The mean flow values were 26.99 mm for BioRoot, 28.19 for Sealapex, and 30.8 mm for TotalFill BC Sealer, satisfying the ISO standard. In the set samples, BioRoot RCS had higher pH values at 24 hours to 1 week after immersion in distilled water. At 2 weeks, both bioceramic sealers had similar pH values, greater than that of Sealapex. In the fresh samples, the bioceramic sealers had significantly higher initial pH values than Sealapex (p < 0.05). At 24 hours post-immersion, all sealers showed an alkaline pH, with the highest pH observed for TotalFill. Conclusions: The TotalFill BC Sealer demonstrated the highest flow. The bioceramic sealers initially presented higher alkaline activity than the polymeric calcium hydroxide sealer. However, at 3 and 4 weeks post-immersion, all sealers had similar pH values.

• Restorative Dentistry and Endodontics
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• 제22권1호
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• pp.156-169
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• 1997

This study was designed to evaluate the influences of evaporation of liquid of dental cements by drying during long term using. Zinc phosphate cement, polycarboxylate cement, and glass ionomer cement were used, and evaluated the properties as follows; consistency, setting time, film thickness, solubility, and compressive strength according to the ADA specification. The specimens of control group were made by mixing the newly opened liquid using the powder-liquid ratio recommended by the manufacturer, and the specimens of ES groups were made by mixing the 10% evaporated liquid by drying with the powder-liquid ratio recommeded by the manufacturer, and the specimens of EM group were made by mixing the 10% evaporated liquid with the powder-liquid ratio modified for standard consistency. The following conclusions were drawn ; 1. The viscosity of mixture of all kinds of cements were increased by the evaporation of liquid, especially the viscosity of glass ionomer cement were influenced significantly. 2. The amount of liquid should be increased to get a standard consistency at the using of evaporated liquid of cement, the most significant increase of liquid amount was required on Ketac-Cem. 3. The setting times were increased at both cases of mixing of evaporated liquid with powder - liquid ratio recommended by manufacturer or modifided through consistency test. 4. At an experimental group of mixing of the evaporated liquid with powder-liquid ratio recommended by manufacturer, solubility was decreased and film thickness was increased. 5. By the result of evaporation of cement liquid, the compressive strength of polycarboxylate cement was increased slightly and it of glass ionomer cement was increased, however, by the increase of amount of liquid to be possible to manipulate the compressive strength were decreased.

• 한국콘텐츠학회논문지
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• 제16권1호
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• pp.541-557
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• 2016

본 연구의 목적은 치과서비스를 대상으로 서비스 개별성, 서비스 능력, 서비스 공감성 등 서비스특성이 신뢰, 감정적 몰입 및 계산적 몰입에 미치는 영향력을 확인하고, 또한 신뢰, 감정적 몰입, 계산적 몰입, 고객 충성도 관계를 확인함으로써 감정적 몰입과 계산적 몰입의 인과적 역할을 설명하는데 있다. 본 연구는 SPSS 20.0 및 AMOS 16.00 통계패키지를 이용하여 구조방정식모형분석으로 연구가설을 검증하였다. 분석 결과 첫째, 서비스개별성은 감정적 몰입에 영향을 주었고, 서비스능력은 신뢰에 영향을 주었으며, 서비스공감성은 감정적 몰입 및 신뢰에 영향을 주었지만, 계산적 몰입은 어떠한 서비스특성에 영향을 받지 않았다. 둘째, 신뢰는 감정적 몰입에는 영향을 주지 않은 반면 계산적 몰입 및 고객 충성도에는 긍정적인 영향을 주었다. 셋째, 감정적 몰입 및 계산적 몰입은 고객 충성도에 긍정적인 영향을 주었다. 따라서 치과서비스제공자는 이용자에게 서비스 능력과 공감성을 제시하여 신뢰를 높이고, 서비스 개별성과 공간성으로 감정적 몰입을 높이는 차별적 관계형성이 필요할 것이다. 또한 신뢰가 형성된 고객은 직접적으로 고객충성도를 유도하거나 또는 다양한 혜택을 제시하여 간접적으로 고객충성도를 구축해야 하며, 감정적 애착이 높은 고객은 강력한 고객충성도를 구축할 수 있도록 적합한 마케팅전략을 제시해야할 것이다.

• 치위생과학회지
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• 제17권2호
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• pp.123-133
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• 2017

본 연구에서는 국제적인 치위생계의 임상실무와 교육의 표준인 치위생 관리 과정을 기반으로 표준화된 치위생 교육기관인 미국 폰즈스쿨의 임상치위생학 교육과정에 대해 심층분석 함으로써 국내 실정에 맞는 임상치위생학 교육과정의 표준화 방안에 대해 고찰해 보고자 하였다. 2015~2016년 폰즈스쿨의 임상치위생학은 모두 'Dental Hygiene Clinical Practice (DHYG)'라는 과목명으로 운영되었고, 실습의 비중이 매우 컸으며, 실습강의는 교수 1명당 학생 5명이 한 팀으로 운영되었다. 폰즈스쿨의 학과 목표는 브릿지포트 대학교의 미션에 따라 설정되었고, 폰즈스쿨의 임상치위생학 교육목표 또한 폰즈스쿨의 학과 목표에 기반하여 설정되었다. 또한, 임상치위생학의 교육목표는 ADHA에서 제시한 치위생임상 실무표준에 따라 개발되었고, 이를 기반으로 임상치위생학 교육을 통해 달성해야 하는 임상 핵심역량과 세부역량을 제시하고 있었다. 임상치위생학 교육내용은 다양한 대상자에게 적절한 치위생 관리 과정을 제공하기 위한 이론 및 실습으로 구성되었고, 특히, 졸업 후 실제 임상 현장에서 수행하게 될 업무에 대한 실습내용이 다뤄졌다. 학생은 대상자/환자별로 수행한 술식에 문서를 작성하여 교수자와 함께 검토 및 보완작업을 통해 치위생 임상역량을 높이고자 하였다. 실습내용 중 치위생 관리 과정 실습은 필수적으로 어린이, 청소년, 성인, 노인, 특별환자를 대상으로 선정해야 하며, 구강 상태에 따라 중등도 이상의 치주환자를 포함해야 했다. 이론평가는 지필고사 혹은 사례연구 발표 등으로 이루어졌고, 실습평가는 주로 임상역량의 달성 정도에 따라 평가되었다. 특히 교수자의 로테이션 평가를 실시하였는데, 이를 통해 모든 학생의 임상역량 달성 정도를 파악하고 부족한 역량에 대해 개선방안을 함께 모색하는 과정을 수행하였다. 본 연구는 ADHA에서 제시하는 치위생임상 실무표준에 따라 운영되고 있는 표준화된 임상치위생학 교육과정을 심층적으로 분석함으로써 향후 우리나라 임상치위생학의 개선방향을 모색하기 위한 기초 자료로 제시될 수 있을 것이라 판단되었다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제48권5호
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• pp.249-258
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• 2022

The specific muscular structure of the tongue greatly affects margin shrinkage and tumor invasion, making the optimal surgical margin controversial. This study investigated surgical margin correlated prognosis of TSCC (tongue squamous cell carcinoma) according to margin location and its value, and the histopathologic factors which are suggestive of tumor invasion. And we would like to propose defining of the surgical margin for TSCC via prognosis according to location and margin values. We reviewed 45 patients diagnosed with TSCC who visited Seoul National University Dental Hospital (SNUDH) (Seoul, Republic of Korea) from 2010 to 2019, who were managed by a single surgical team. Patient clinical and pathological data of patients were retrospectively reviewed, and in 36 out of 45 patients, the pathologic parameters including the worst pattern of invasion (WPOI) and tumor budding were investigated via diagnostic histopathology slide reading. When standardized with as 0.25 cm anterior margins, as 0.35 cm deep margin, there was no significant difference in disease specific survival (DSS) or loco-regional recurrence-free survival (LRFS). Additionally, there was a non-significant difference in DSS and LRFS at the nearest margin of 0.35 cm (P_DSS=0.276, P_LRFS=0.162). Aggressive WPOI and high tumor budding showed lower survival and recurrence-free survival, and there were significant differences in close margin and involved margin frequencies. In TSCC, the value and location of the surgical margin did not have a significant relationship with prognosis, but WPOI and tumor budding suggesting the pattern of muscle invasion affected survival and recurrence-free survival. WPOI and tumor budding should be considered when setting an optimal surgical margin.

• 대한치과의료관리학회지
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• 제5권1호
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• pp.1-12
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• 2017

치과의료가 새로운 재료와 기자재, 기술의 등장으로 지속적으로 변화하지만 구강보건인력의 업무 범위는 법적 개정이 쉽지 않은 현실이다. 특히 치과위생사의 경우 업무가 체계화 되고 않고 있으며 업무범위에 대한 이견이 존재한다. 본 연구의 목적은 치과의사와 치위생학과에 재학 중인 학생들 간의 치과위생사의 현재와 미래의 업무 범위에 대한 인식의 차이를 알아보아 치과위생사의 법적 업무범위에 대한 검토 자료로 제공하고자 한다. 일개지역 치과의원, 치과병원에 종사하는 치과의사와 치위생학과 4학년에 재학 중인 학생을 대상으로 하였으며 개원치과의사 42명, 치위생학과 4학년 30명이 설문조사에 응하였으며 통계검정은 피셔의 정확검정을 시행하였다. 치과의사와 치위생학과 학생간의 업무 범위 이견은 진료기록부 작성하기, 치주낭 측정, 활력징후 측정하기, 구강위생관리 계획하기, 러버댐장착하기, 도포마취하기, 침윤마취하기, 수술 후 처치하기, 건강보험 청구하기, 치근활택하기, 치주기구 관리하기, 매트릭스 밴드 장착하기, 임시충전하기, 와동내 충전하기, 근관 처치하기, 보철물장착하기, 개인트레이 제작하기, 치면열구전색하기, SP crown 및 제작 및 장착하기, 치간이개하기, 교정용브라켓장착하기, 와이어결찰하기, 엘라스틱 걸기, 고정성교정장치 제거하기, 인력채용참여하기, 인력 교육 및 관리하기에서 나타났다. 치과의사와 치위생학과 학생간의 업무범위에 관해 의견이 차이가 없는 것은 구내외 방사선 촬영 및 현상, 예진하기, 구강보건교육, 진료 후 주의사항 전달하기, 알지네이트 인상채득하기, 모형 만들기, 진료준비하기, 진료보조하기, 감염관리학기, 환자상담하기, 스케일링하기, 연마하기, 치은압배하기, 정밀인상채득하기, 임시치아만들기, 시멘트 제거하기, 불소도포하기, 치과진료비 관리하기, 치과재료 구매하기, 치과기구 관리하기, 치과재료 및 기구 사용상태 기록하기, 폐기물 관리하기, 진료기록부 관리하기이었다. 따라서, 치과의사와 치위생학과 학생은 치과위생사 업무범위에 관한 이견이 존재하므로 관련 단체들의 논의와 합의가 필요할 것으로 사료되었다.

• 한국치위생학회지
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• 제11권2호
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• pp.293-301
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• 2011

Objectives : The aim of the trial was to study the effect of plaque control(tooth brushing instruction) for oral health improvement on periodontitis patients. Methods : 30 patients(35~65 years) with advanced periodontal disease were subjected to a baseline examination including assessment of oral hygiene status(O'leary index), gingival condition(bleeding). the assessment were repeated after 2, 4, 6 weeks. cognitive, behavioral and clinical outcomes were assessed in the primary care setting by questionnaire and clinical oral examination. Results : The oral hygiene status expressed as the individual mean percentage of tooth surfaces with plaque 59.3% at baseline and 21.2% after 6 weeks(p<0.001). The gingival bleeding status expressed as the individual mean point of interdental papilla 3.8 at baseline and 1.9 after 6 weeks(p<0.001). Also, the patients self-assessment about correct tooth brushing behavior was 3.9(5-point likert scales), satisfaction of plan practices 4.1(5-point likert scales), efficacy of tooth brushing instruction 8.7(10-point likert scales). Patients wanted to continuous participation. Conclusions : A verification of effect after individualized oral health instruction and repeated dental plaque control represented to significance on plaque control score, oral care practice and oral health recognition. The important oral care step against periodontal disease is to establish good oral health habits. Also, oral health behavior recognition is more important for the practice of oral health. Therefore professional plaque control and tooth brushing instruction absolutely need in improving oral health.