에리저가 조사된 유전치 상아질과 복합레진의 전단결합강도에 관한 연구

이우석,이긍호 慶熙大學校 齒科大學 1995 慶熙齒大論文集 Vol.17 No.2

The purpose of this study is to compare the shear bond strength of composite resin to dentin which was irradiated by CO2 laser. 120 primary anterior teeth were divided into one control and five experimental groups. Control group was not surface-treated and experimental groups were laser-irradiated. The CO2 laser was used at the power of 1.0 W, 0.2 sec(Experimental group 1), 15 W, 02 sec(Experimental group 2), 2.0W, 02 sec(Experimental group 3), 2.5 W, 0.2 sec(Experimental group 4) and 3.0 W, 02 sec(Experimental group 5). The smear layer on the surface of dentin was removed, the orifices of dentinal tubules were opened and the shear .bond strength of composite resin to dentin was increased by the irradiation of CO2 laser. The results were as follows: 1. Higher shear bond strength was obtained in laser pre-treated groups than contol group. 2. The smear layer on the surface of dentin was removed by the irradiation of CO2 laser. 3. The highest shear bond strength was found in experimental group 2 and followed by experimental group 1,5,4 and 3. Experimental group 2 shows a significant difference from other groups(P<0.05), experimental group 1 shows a significant difference from experimental group 2,3(P<0.05) and there was no significant difference between experi mental group 3,4 and 5. 4. Surface-fusion of the dentin was occurred in experimental group 3,4,5 according to the increase of the laser energy.

레이저가 조사된 유전치 상아질과 복합레진의 전단결합강도에 관한 연구

이우석,이긍호 大韓小兒齒科學會 1996 大韓小兒齒科學會誌 Vol.23 No.1

The purpose of this study is to compare the shear bond strength of composite resin to dentin which was irradiated by CO₂laser. 120 primary anterior teeth were divided into one control and five experimental groups. Control group was not surface-treated and experimental groups were laser-irradiated. The CO₂laser was used at the power of 1.0 W, 0.2 sec(Experimental group 1), 1.5 W, 0.2 sec(Experimental group 2), 2.0 W, 0.2 sec(Experimental group 3), 2.5 W, 0.2 sec(Experimental group 4) and 3.0 W, 0.2 sec(Experimental group 5). The smear layer on the surface of dentin was removed, the orifices of dentinal tubules were opened and the shear bond strength of composite resin to dentin was increased by the irradiation of CO₂laser. The results were as follows: 1. Higher shear bond strength was obtained in laser pre-treated groups than control group. 2. The smear layer on the surface of dentin was removed by the irradiation of CO₂ laser. 3. The highest shear bond stength was found in experimental group 2 and followd by experimental group 1,5,4 and 3. Experimental group 2 shows a significant difference from other groups(P<0.05), experimental group 1 shows a significant difference from experimental group 2,3(P<0.05) and there was no significant difference between experimental group 3,4 and 5. 4. Surface-fusion of the dentin was occurred in experimental group 3,4,5 according to the increase of the laser energy.

장애인의 치과치료시 전신마취 이용에 관한 통계적 연구

이긍호,정영진 大韓小兒齒科學會 1992 大韓小兒齒科學會誌 Vol.19 No.1

The use of general anesthesia as a special method of behavior management is necessary if certain handicapped or very young patients are to receive dental treatment. This study was designed to report the results of 29 cases of complete oral rehabilitation under general anesthesia. The data were obtained from 29 patients managed at the Dept. of Pedodontics, Kyung Hee Medical Center. The distribution of age, sources of referral, primary reason for general anesthesia, preperative 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(82.7%) were younger than 10 years and mean was 8.6 years(range 2-25). The major source of referral of patients were local or other hospital dentists(69.0%) and the others(31.0%) came to the practice at their own initiative. 2. In the primary reason for general anesthesia, the majority of the patients (82.8%) were mentally or physically handicapped and others(17.2%) were received general anesthesia because of management problem. 3. In the preoperative physical status, the majority of the patients(97%) were in ASA class Ⅰ or classⅡ. In the preoperative oral condition, only the caries teeth were surveyed, the mean number of caries teeth was 11.1(range 3-20). 4. Nasotracheal intulbation was used in 23 patients(79.3%) and the drugs used for maintaining the general anesthesia were Halothane(82.8%) and Ethrane(17.2%). 5. In the performed dental treatment, the mean number of teeth treated with amalgam or composite resin was 7.0(range 1-13), vital pulpotomy was 1.7(range 0-7), stainless steel crown was 0.9(range 0-5), and the number of extracted teeth was 2.6(range 0-10). The mean duration of procedure was 129 minutes(range 65-230), and the mean duration of hospitalization was 1.9 days (range 1.0-2.0) 6. Of the patients, postoperative complications developed in 12 patients (41.5%). The most frequent complication was postoperative fever(n=8), followed by swelling of the lip and/or cheek, vomiting, and upper respiratory infection.

천궁(Cnidii Rhizoma)의 메탄올 추출물이 GABA 및 Glycine 수용체에 미치는 영향

이종태,박재홍,이긍호 大韓小兒齒科學會 2005 大韓小兒齒科學會誌 Vol.32 No.1

천궁의 메탄올 수용액 추출물의 진정 작용을 밝히기 위하여 staircase test를 시행하였으며, 근육이완 효과를 검색하기 위하여 rotarod test를 시행하였다. 진정 작용의 기전 구명을 위하여 GABA 및 glycine 수용체에 작용하는 약물인 picrotoxin, yohimbine, isoniazid, strychnine 등의 약물을 이용하여 발작 유도에 걸리는 시간을 비교 관찰하였다. 또한 생체에서의 안전성을 검증하기 위하여 Irwin의 행동시험 및 신경세포에 대한 독성을 평가하기 위하여 MTT test를 실시하여 다음의 결과를 얻었다. 1. Staircase 실험에서 천궁 추출물을 10mg/kg 용량으로 경구 투여했을 때 climbing수는 대조군과 차이가 없었으나, rearing수에서는 대조군에 비하여 42%의 감소를 보였다. 2. 30mg/kg 용량으로 경구 투여했을 때, climbing수는 대조군과 차이가 없었으나, rearing수에서는 51%의 감소를 유발하였다. 3. 근육이완 작용을 탐색하기 위한 rotarod 실험에서는 대조군과 차이를 나타내지 않았다. 4. 천궁 추출물의 투여는 picrotoxin, isoniazid, yohimbine에 의한 발작에서는 큰 변화를 유발하지 않았으나, strychnine에 의한 발작 유도시간은 41%의 증가를 유발하였다. 5. 일반 행동에서도 특이한 변화를 유발하지 않았으며, 신경세포에 적용했을 때 특이한 독성 반응을 나타내지 않았다. 천궁의 메탄올 수용액 추출물은 현저한 진정 작용을 유발하며, 그 작용 기전으로서 glycine의 작용을 증가시켜 chlorideion의 세포내 유입으로 인한 억제성 신경전도를 유도한다고 사료된다. 또한 근육이완 작용도 나타나지 않았으며, 특이한 생체독성도 유발되지 않은 것으로 보아, 향후 치과임상에서 진정요법의 한 수단으로서 사용될 수 있다는 가능성을 제시한다. Cnidii Rhizoma (CR) was subjected to extraction with 70% methanol and tested to determine whether it has anxiolytic activity in mouse by employing staircase and rotarod tests. In addition, to understand the mechanism of anxiolytic action, CR, picrotoxin, yohimbine, isoniazid and strychnine were utilized to delineate the potential involvement of GABA and glycine receptors in the action of Cnidii Rhizoma. To gain insights into the safety of Cnidii Rhizoma extract, behavioral and MTT tests were carried out. The results were obtained as follows: 1. CR extract had little effect on climbing numbers in the stair case test. 2. CR extract had considerable anti-anxiety effects as evidenced by the reduction of rearing numbers in the stair case test. 3. CR extract had little effect on muscle relaxation. 4. Anxiolytic actions of CR extract appeared to be mediated by glycine receptor activation. 5. Cytotoxicity in the neuronal cell was not observed and no strange behaviors were found. In short, these results indicate that CR extract has the ability to exert anxiolytic activity, possibly by activating glycine receptor with little side effects in mouse.

뇌성마비 환자의 치아우식 경험도에 관한 조사 보고

이긍호,한창규 大韓小兒齒科學會 1994 大韓小兒齒科學會誌 Vol.21 No.2

The purpose of this study was evaluation of the oral health of cerebral palsied children by considering the DMFT index. The 31 cerebral palsied children (Male 20, Female 11) participated in the study, and mean age was 11.3 years. All patient were examined for determination of decayed tooth, missing tooth, filled tooth. For children with only deciduous dentition, the dmf system was used ; for children with only permanent dentition, the DMF system was used ; for children with mixed dentition, a combination of two systems(dmf and DMF) was used. The results were as follows : 1. In the deciduous dentition, dmft index was 11.60.(dt rate ; 83.62%, mt rate ; 12.07%, ft rate ; 4.31%) 2. In the mixed dentition, DMFT index was 12.25 and dmft index was 10.75.(DT rate ; 90.00%, MT rate ; 0%, FT rate ; 10.00%, dt rate ; 60.53%, mt rate ; 28.95%, ft rate ; 10.52%) 3. In the permanent dentition, DMFT index was 8.16.(DT rate ; 87.77%, MT rate ; 11.51%, FT rate ; 0.72%)

다발성 무치근 치아에 대한 치과적 처치

이미숙,이긍호,최영철 대한소아치과학회 2001 大韓小兒齒科學會誌 Vol.28 No.2

감각신경아세포종으로 생후 1년 6개월부터 약 1년간 6주기의 화학요법과 생후 1년 6개월에 29회에 걸친 방사선 조사(AP 4540 R+LAT 1080 R : total 5620 R)를 받은 후 후유증으로 상악치아 및 상악골의 발육장애를 보이는 10세 남아의 임상적, 방사선학적 관찰 및 치료 후 다음과 같은 지견을 얻었기에 보고하는 바이다. 1. 성장중인 어린이에서 악성종양의 치료를 위한 방사선 조사는 연조직 및 경조직(골, 연골, 치아)등의 성장장애를 유발할 수 있으므로 시술 전 충분한 고려가 필요하다. 2. 치배의 손상은 치관 및 치근의 형성장애를 유발하고 이에 따라 치조골의 성장장애가 나타나므로 치근이 없는 치아일지라도 치조골의 흡수를 억제하기 위하여 hawley type의 부분의치 등을 이용하여 잔존시켜야 한다. 3. 향후 성장이 완료된 이후(만 18세 이상)에 무치근 치아 및 무치악 부위에 틀니(denture)나 임플란트 등의 보철수복이 필요할 것으로 여겨진다. Chemotherapy and radiotherapy used on pediatric oncology patients often causes dentofacial anomalies. Defects noted include tooth and root agenesis, root thinning, root shortening, localized enamel defect and maxillofacial underdevelopment. The effect of radiotherapy usually is confined to the radiation site but the effect of chemotherapy may be more wide spread becuase of its systemic distribution. Many pediatric cancers are treated with a combination of radiation and multiagent chemotherapy. Dental treatment affected by chemotherapy and radiation therapy damate to developing teeth and maxilloface includes retention of teeth, space maintenance, prosthetic considerations, requirements for oral hygiene. The following case related to multiple rootless teeth.

Frankel appliance(FR-2)를 이용한 2급 부정교합 환자의 치험례

이긍호,최영철,부성언 大韓小兒齒科學會 1990 大韓小兒齒科學會誌 Vol.17 No.2

The functional regular(FR-2) is a removable orthodontic appliance developed by Rolf Frankel that is used during the mixed and early permanent dentition stages to effect changes in anteroposterior, transverse, and vertical jaw relationship in class Ⅱ malocclusions. This appliance serves as a template against which the craniofacial muscles function. The framework of the appliance provides an artificial balancing of the environment, thereby promoting more normal patterns of muscle activity. The Frankel also influences skeletal and dental development. The appliance removes muscle forces in the labial and buccal areas that restrict skeletal growth, thereby providing an environment that maximizes mandibular growth. The case presented here and the progressive analysis reveals the forward and downward growth of the mandible remarkably. This patient with severe overjet, convex profile, underdeveloped and retrognathic mandible have been treated with FR-2, and forward and downward growth of the mandible was observed.

전신마취를 이용한 장애인의 보철치료 : 증례보고

이정옥,최영철,이긍호 大韓小兒齒科學會 2000 大韓小兒齒科學會誌 Vol.27 No.1

장애인은 일반적으로 구강관리에 대한 인식과 수행능력의 부족으로 구강위생상태가 불량하며, 치과질환의 발생빈도가 높고 그 정도가 심한 편이다. 장애인의 치과치료시 많은 어려움이 따르는 행동조절은 장애의 종류와 정도에 따라 심리적, 물리적, 약물적 방법 및 전신마취 등을 선택할 수 있으나, 여러가지 이유로 인하여 일반적인 방법으로 치료가 불가능할 경우 전신 마취를 이용하게 된다. 장애인 환자에 있어서 보철치료는 정상인에서와 다를 바가 없으나 장애 정도에 따라 치과의사의 세심한 주의가 필요하며, 수복 후에도 철저한 구강위생관리를 위해 환자 스스로나 보호자의 각별한 노력이 요구된다. 본 증례는 경도의 장애를 가지고 있으나 치과치료에 대한 불안과 공포가 심하고, 다수치아의 수복을 위하여 장시간의 치과 치료가 요구된 경우로서 전신마취를 이용한 보존, 외과적 처치 및 보철치료를 시행하여 비교적 양호한 결과를 얻었다. Dental caries and periodontal disease continue to present unique problems in the dental management of the persons with disabilities because the chronicity of oral diseases complicates the primary physical or mental disability. The increased prevalence of dental disease in most persons with disabilities is probably mot due to any inherent proclivity for dental disease but more likely evolves because dental care receives less attention. Prosthetic dentistry procedures are not contraindicated for most patients with physical and mental disabilities. Fixed bridges may be feasible if the patient or care provider can maintain adequate oral hygiene and the patient's disability dose not preclude this type of prosthesis. Removable partial or full dentures may be indicated if the patient or care provider can easily remove the prosthesis and care for it. Although most persons with disabilities need no additional behavior management modalities to complete dental care, some persons require professionally recognized behavior management techniques during treatment, such as physical restraint, pharmacologic agents, or general anesthesia. Hospitalization and the use of general anesthesia are sometimes required to deal effectively with the extreme management problem patient. This patient with mild mental retardation was fearful of dental treatment. Routine restorative, surgical and prosthetic dentistry procedures were performed under general anesthesia.

치면열구 전색재의 중합도에 관한 연구

이긍호,부성언 大韓小兒齒科學會 1992 大韓小兒齒科學會誌 Vol.19 No.1

The purpose of this study was to assess the thickness of unpolymerized layers on sealants and to estimate the degree of polymerization of sealants. In this study, amterials used were four kinds of visible light-cured sealants and two kinds of chemically cured sealants. The thickness of unpolymerized layer was assessed by light microscope and the degree of polymerization was analysed by FTIR spectroscopy and following results were obtained. 1. The thickness of unpolymerized layers ranged from 6.33 to 13.89㎛ in light cured sealants and from 67.11 to 75.00㎛ in chemically cured sealants, and the thickness of unpolymerized layer of light cured sealants were thinner than those of chemically cured sealants(p<0.001). 2. As the exposure time incureased, the differences of thickness of unpolymerized layers in light cured sealants were statistically insignificant except differences between 10 seconds group and 20 seconds group of Concise(p<0.01). 3. As the exposure time increased, the increases of degree of polymerization between 10 seconds group and 20 seconds group of Pit & Fissure Sealant and Teethmate-A were statistically significant (p<0.01). 4. The detree of polymerization of Teethmate-A, Fissureseal and Hi-Pol was greater than that of other visible light cured sealants(p<0.01).

아동의 치과치료시 심박동과 동맥혈 산소포화도의 변화에 관한 연구

이상훈,이긍호,김광철 大韓小兒齒科學會 1993 大韓小兒齒科學會誌 Vol.20 No.1

The purpose of this study was to examine the effect routine dental procedures on pulse tate and oxygen saturation in children using the pulse oximetry(Nellcor N-250 Pulse oximeter/display midule, U.S.A.) and to develop a baseline for additional studies of oxygen saturation in sedated pediatric dental patients. The data were obtained from 65 children(2 to 15 years of age) treated at the Dipt. of Pedia. Dint.,Kyung-Hee Medical Center. Subjects were divided into 2 groups. An Amalgam treatment group and an Extraction group. Pulse rate and oxygen saturation were measured and recorded using pulse oximetry and were evaluated the change above or below three-minutes preoperative baseline for each step. The results were as follows: 1.In Amalgam treatment group, significant increases of pulse rate were observed during rubber dam application, local anesthetic injection, cavity preparation and anesthetic uptake. 2.In Extraction group,significant increases of pulse rate were observed during all treatment session. 3.In Amalgam treatment group, no significant increases of oxygen saturation were observed during all treatment session. 4.In Extraction group, significant increases of oxbgen saturation were ovserved during anesthitic uptake,tooth extraction and postoperative period.