소아치과에 내원한 환자의 전신마취에 관한 연구

강덕일,정문용,이창섭,이상호 朝鮮大學校 口腔生物學硏究所 1997 口腔生物學硏究 Vol.21 No.1

The use of general anesthesia as a special method of behavior management is necessary if certain handicapped or unmanaged patients be to receive dental treatment. This study was designed to report the result of 13 cases of complete oral rehabilitation under general anesthesia. The data were obtained from 13 patinents managed under general anesthesia at the Dept. of Pedodontics, Chosun Universit. The distribution of age, source of referral, primary reason for general anesthesia, preoperative physical status, oral condition, intubation methods, drugs used for maintaining the general anesthesia, types and extent of dental treatment, duration of procedure, duration of hospitalization, and postoperative complications were surveyed. The results were obtained as follows : 1. In distribution of age, most(92.3%) were younger than 10 years and mean was 5.2years. The major sources of patients(69.2%) came to the practice at their own intiative and the other(30.7%) were refered local dentist. 2. In the primary reason for general anesthesia, the majority of the patients(76.9%) were management problem and others(13.1%) were received general anesthesia because of mentally or physical handicapped. 3. In the preoperative physical status, the majority of the patients(92.3%) were in ASA class Ⅰ or class Ⅱ. In the preoperative oral condition, the mean number of caries teeth was 12. 4. Nasotracheal intubation was used in all patients and the drug used for maintaining the general anesthesia were Enflurane. 5. In the performed dental treatment, the mean number of teeth treated with amalgam 1.5, G-Ⅰ filling 2.1, resin filling 3.6, sealing 1.4, pulpotomy 0.7, pulpectomy 1.6, preformed crown 3.7, and Extracted teeth was 0.2 . The mean duration of procedure was 178 min, and the mean duration of hospitalization was 1.6days. 6. Of the 13 patients, postoperative complications developed in 3 patients(23%). Complication were postoperative fever.

고속 촬영에 의한 고주파 전기 저항 용접 현상의 해석

강덕일,최재호,장영섭,김용석 대한용접접합학회 1998 대한용접·접합학회지 Vol.16 No.2

화학제재를 이용한 우식상아질 제거 효과 및 레진과의 결합강도에 관한 연구

강덕일,이병채,설재헌 조선대학교 구강생물학연구소 2003 口腔生物學硏究 Vol.27 No.1

The aim of this study was to evaluate the effect of chemo-mechanical caries removal system(CarisolvTM, Medi Team. Sweden) for resin adhesion to carious primary and Permanent dentin compared with conventional drilling method. The buccal surface of 92 Primary molars and 92 permanet molars were used. Exposed dentins were occurred artificial caries. 32 tooth of primary molars and 32 tooth of permanet molars were prepared to observe treated dentin surface with CarisolvTM and conventional drilling method by SEM. Other tooth were prepared to measure resin-dentin shear bonding strength according to caries removal methods and dentin adhesive system. Two adhesive systems and a composite resin were used: single bonding agent(Scotchbond Multi-Purpose Plus, 3M) and self-etching bonding system(Prompt L-Pop, 3M ESPE), and a composite resin(Z-250, 3M) The results were as follows : 1. The effect of CarisolvTM on primary dentin was stronger than that to permanent dentin, and dentin surface became rougher with treated CarisolvTM than drilling method. 2. Acid-etched dentin surfaces were showed smoothing without smear layer. 3. In specimen applied single bonding system hybrid layer and adhesive layer were 3-4㎛ and 10-15㎛ in thickness, whereas self-etching bonding system hybrid layer were 1-2㎛ 4. The shear bonding strength of group applied single bonding agent was higher than that applied self-etching priming system(P<0.05). 5. The shear bonding strength of group applied CarisolvTM and self-etching priming system were slightly higher than that applied conventional drilling method and self-etching priming system(P>0.05).

화학제재를 이용한 우식상아질 제거효과 및 레진과의 결합강도에 관한 연구

강덕일,박인천,이난영,이상호,이창섭,Kang, Dug-Il,Park, In-Chon,Lee, Nan-Young,Lee, Sang-Ho,Lee, Chang-Seop 대한소아치과학회 2003 大韓小兒齒科學會誌 Vol.30 No.4

본연구는 유치와 영구치의 우식상아질을 제거하는 방법에 따른 상아질표면의 변화와 산부식양상, 혼성층의 양상, 그리고 이들이 상아질에 대한 복합레진의 전단결합강도에 미치는 영향을 평가할 목적으로 시행되었다. 92개의 유구치와 92개의 영구 구치를 준비하여 상아질 표면을 노출시키고 인공우식을 유발시켰다. 이중 32개의 유구치와 32개의 영구구치는 $Carisolv^{TM}$과 bur로 삭제후 상아질표면을 SEM관찰하였으며 나머지 치아에서는 레진-상아질간 전단결합강도를 측정하였다. 두가지 접착시스템(Single bond system, self-etching bonding system)과 한 종류의 레진(Z250, 3M)을 사용하였으며 다음과 같은 결과를 얻었다. 1. $Carisolv^{TM}$의 우식치질 제거효과는 영구치보다 유치에서 더 우수하였으며, bur로 제거한 경우보다 더 거친 상아질 표면이 관찰되었다. 2. 산부식처리한 경우 유치와 영구치 모두 우식제거방법과 관계없이 도말층이 제거된 양상을 보였다. 3. Single bond system을 이용한 경우 두터운 $2-4{\mu}m$의 혼성층과 $10-15{\mu}m$의 adhesive layer가 관찰된 반면, self-etching bonding system에서는 비교적 얇은($1-2{\mu}m$) 혼성층만이 형성되었다. 4. 전단결합강도는 유치와 영구치 모두 우식제거방법에 관계없이 Single bonding agent를 적용한 경우에 self-etching bonding agent를 적용한 군보다 유의하게 높게 나타났다(P<0.05). 5. $Carisolv^{TM}$와 self-etching bonding agent 처리군에서 bur와 self-etching system 처리군보다 다소 높은 전단결합강도를 보였으나 유의성은 없었다(P>0.05). The aim of this study was to evaluate the effect of chemo-mechanical caries removal system($Carisolv^{TM}$, Medi Team, Sweden) for resin adhesion to carious primary and permanent dentin compared with conventional drilling method. The buccal surface of 92 primary molars and 92 permanent molars were used. Exposed dentins were occurred artificial caries. 32 tooth of primary molars and 32 tooth of permanent molars were prepared to observe treated dentin surface with $Carisolv^{TM}$ and conventional drilling method by SEM. Other tooth were prepared to measure resin-dentin shear bonding strength according to caries removal methods and dentin adhesive system. Two adhesive systems and a composite resin were used; single bonding agent(Scotchbond Multi-Purpose Plus, 3M) and self-etching bonding system(Prompt L-pop, 3M ESPE), and a composite resin (Z-250, 3M). The results were as follows : 1. The removal effect of carious dentin on $Carisolv^{TM}$ was stronger on the primary dentin than that to permanent dentin, and dentin surface became rougher with treated $Carisolv^{TM}$ than drilling method. 2. Acid-etched dentin surfaces were showed smoothening without smear layer. 3. In specimen applied single bonding system hybrid layer and adhesive layer were $2-4{\mu}m$ and $10-15{\mu}m$ in thickness, whereas self-etching bonding system were showed only thin hybrid layer($1-2{\mu}m$). 4. The shear bonding strength of group applied single bonding agent was higher than that applied self-etching priming system(P<0.05). 5. The shear bonding strength of group applied $Carisolv^{TM}$ and self-etching priming system were slightly higher than that applied conventional drilling method and self-etching priming system(P>0.05).

Midazolam의 비강내 분무시의식진정효과에 관한 연구

강덕일,정문용,김형태 朝鮮大學校 口腔生物學硏究所 1998 口腔生物學硏究 Vol.22 No.2

The purpose of this study was to assess the sedative effect of intranasal spray with midazolam for management of the uncooperative 20 children aged from 24 months to 92months required extensive treatment. The patients were given randomly a dose of 0.2㎎/㎏ of intranasal placebo, intranasal spray with midazolam, and intranasal drop with midazolam. All the children were restrained in a pediwrap and were monitored with pulse oximeter for assessing the pulse rate and peripheral oxygen saturation. According to Fukuta's behavior rating scale, behavior were checked for evaluation of the clinical sedative effect. The obtained results were as follows : 1. Behavior score of intranasal spray with midazolam was inferior to intranasal drop with midazolam(p<0.01). 2. Pulse rate was not affected significantly by adiministration route of drug, however there was a significant change as a function of dental procedure (F + 22.6, P<0.001). 3. The peripheral oxygen saturation was not influenced significantly by either adiministration route of drug or dental procedure. 4. There were no clinical signs of significant cyanosis and respiratory depression. Clinically intranasal spray with midazolam were safe and effective sedation in young children undergoing pediatric dental procedures.

$CO_2$ 용접에서 전류 펄스 조건이 스패터 발생에 미치는 영향

강덕일,최재호,장영섭,김용석 대한용접접합학회 1998 대한용접·접합학회지 Vol.16 No.4

In this study, the effects of the current pulsing conditions, on the spatter generation rate during the $CO_2$ gas metal arc welding (GMAW) were investigated. Normally using the inverter type power supply, of which the welding current waveform was regulated to reduce the spatter generation rate, but in this study pulsing was imposed on the welding current. Observation of the metal transfer phenomena during the pulsed current GMAS indicated that the droplet transfer from the electrode via the short circuit transfer and the repelling transfer mode could be minimized by selecting optimum combinations of pulsing parameters, which include base and peak current, base and pak duration. It was also demonstrated in this study that proper combinations of the pulsing parameters led to reduce generation of spatters during GMAW shielded by $CO_2$ gas.

전신마취하에서 유치 조기발거시 간격유지장치의 설계 및 장착에 대한 증례보고

이상호,정문용,이창섭,강덕일 大韓小兒齒科學會 1997 大韓小兒齒科學會誌 Vol.24 No.3

Space maintainers needs following extraction of primary molars, due to severe dental caries under general anesthesia. Delivery of conventional space maintainers has three of the disadvantages of the method, there being a impression taking and time consuming due to laboratory procedure, and delivery problem due to relaxed tongue. For this problem improved, modified space maintainer is prefabricated before procedure, and adjust, delivery in operation room, favorable results were obtained. The following results were obtained. 1. Delivery time is very reduced than conventional space maintainers. 2. After space maintainer delivery, follow check-up, without impingement of soft tissue, distortion of wire. After space maintainer delivery, continuous research is required so that space maintainer delivery is applied to usual dental treatment, and it is necessary of long term research.

소아치과에 내원한 환자의 전신마취에 관한 연구

강덕일(Dug Il Kang),정문용(Moon Yong Jeong),이창섭(Chang Seop Lee),이상호(Sang Ho Lee) 조선대학교 구강생물학연구소 1997 Oral Biology Research (Oral Biol Res) Vol.21 No.1

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화학제재를 이용한 우식상아질 제거 효과 및 레진과의 결합강도에 관한 연구

강덕일 ( Dug Il Kang ) , 이병채 ( Byung Chae Lee ) , 설재헌 ( Jae Heon Seol ) 조선대학교 구강생물학연구소 2003 Oral Biology Research (Oral Biol Res) Vol.27 No.1

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궤도구조를 고려한 철도교량의 동적거동 분석

강덕만(Kang Duck-Man),안해영(An Hea-Young),성덕룡(Sung Deok-Yong),김성일(Kim Sung-Il),박용걸(Park Yong-Gul) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.5월

This study is objected by analyzing whether it is applied to the analysis model considering the track stiffness or not when the railway bridge is designed or reviewed for the dynamic stability. It is performed that the analysis model is verified by comparing the field test result with the analysis result. Also, The dynamic response of railway bridge through the existing analysis model is compared with the analysis model considered the track stiffness. In addition, it is performed by analyzing the model considering the stiffness of concrete track. Therefore, this study is suggested that the design of railway bridge apply to the existing analysis model considering the mass of track and the dynamic stability review of railway bridge apply to it considered the stiffness & mass of track. Also, it is suggested that the stiffness of concrete slab on the bridge must consider when it is designed or checked over the dynamic stability.