전치 유도각의 인위적 증가에 의한 저작근과 하악 운동 양상의 변화에 대한 연구

이용식,최대균,최부병 慶熙大學校 齒科大學 1995 慶熙齒大論文集 Vol.17 No.2

This study' was performed to measure the changes of the mandibular movement and the masticatory muscular activities anterior temporal and masseter muscle of both side - reflected by intentional increase of anterior guidance angle. For this study, 5 volunteers (3 males and 2 females with average age of 24.0) were selected. Each volunteer had Angle's classification I and did not have any missing tooth except third molar and any extensive restorations. Metallic guide plate was made at volunteer's working model fabricated by improved dental stone and cemented to the palatal surface of maxillary central incisor using resin cement(Panavia 21�) and then adjusted not to give any occlusal interferences at intercuspal position. The activity of masticatory muscles and the changes of mandibular movement were recorded by EMG and Sirognathograph in Biopak analysing system(Bioresearch Inc., Milwaukee, Wisconsin, USA). Measurement was done at before experiment, irnmediatley after placement, 1 week after placement, immediately after removal, and 1 week after removal. The results were as follows: 1. Moderate phonetic disturbance and mild headache were occured to 3 volunteers for 2 days after setting and l volunteer had positive reaction to percussion and slight midline diastema. But all of these clinical signs were diappeared 1 week after removal and the other volunteer did not have any special clinical sign. 2. In the EMG of the mandibular rest position, the mean value of anterior tempotal muscle was increased immediately after placement(p<0.01) and then decreased 1 week after placement(p<0.05) and increased 1 week after removal(p<0.05) but not recovered as before experiment. The mean value of masseter muscle was decreased during the experiment period: 3. In the EMG during mandibular protrusive movement, all muscular activity was decreased during the experiment period. Reduced activity was not recovered I week after? removal(p<0.05). 4. During the habitual opening, anteroposterior movement of mandible was decreased immediately after place ment(p<0.05) and then increased 1 week after placement but not statistically significant(p>0.1). Vertical movement was not shown significant difference during the experiment period(p>0.1). Lateral movement was decreased immediately after placement(p<:0.05) and then increased 1 week after placement but not recovered as before experiment. The opening and closing velocity of mandible was shown minor changes but not statistically significant. 5. During the habitual opening, anteroposterior movement of mandible was decreased 1 week after placement(p<0.(6) and then increased immediately after removal and recovered 1 week after removal as before experiment. Vertical movement was not shown significant changes. Lateral displacement of mandible was increased continuously and recovered 1 week after removal. Opening velocity was temporarily increased immediately after removal but recovered and closing velocity was not shown significant changes. 6. During the right side chewing, anteroposterior movement of mandible was increased immediately after removal but recovered and vertical movement was not shown statistically significant results. Lateral displacement and velocity o mandible were not shown significant results. 7. During the left side chewing, the changes of mandibular movement pattern were not shown statistically significant results.

복합레진의 중합 수축력과 수복물의 결합양상에 관한 연구 제 3 편 변연누출과 틈새

박남수,최대균,임호남,최부병,우이형 大韓齒科器材學會 1993 대한치과재료학회지 Vol.20 No.2

This study was designed to confirm the influence of the polymerization contraction stress to the marginal leakage and gaps of resin restorations. Ten kinds of experimental composite resins were prepared with varing the filler contents to display the different polymerization contraction stress. A cavity with enamel and dentin margins were prepared on the cervical area of human tooth. Enamel margins were etched with 37% phosphoric acid for 1 minute. Experimental composite resins were filled into the cavities and immersed in water bath of 37±1℃ for 24 hours, and then immersed into dye solution. Tooth were cut through the restoration, and the infiltration of dye was observed. Marginal gaps were measured on the light microscope with 100 magnifications. The following conclusions were drawn : 1. Polymerization contraction stress and gaps showed the corelation between them, gaps were decreased by increase of filler contents. 2. There was not exist the relationships between polymerization contraction stress and marginal leakage. 3. Marginal leakage and gaps were larger at dentinal margins than enamel margins.

복합레진의 중합 수축력과 수복물의 결합양상에 관한 연구 제 1 편 : 중합수축력

박남수,최대균,임호남,최부병,우이형 大韓齒科器材學會 1993 대한치과재료학회지 Vol.20 No.1

The polymerization contraction forces has a relationship with the contents of filler, and if forces surpass the bond strength between restoration and bonded surface, the failure of bond can be occured. This study was designed to evaluate the effects of filler contents on the polymerization contraction forces and to confirm whether the polymerization forces could induce the bond failure of composite resins to enamel or dentin. Low capacity load cell using strain gauge were prepared and used as a measurement system for polymerization contraction forces. Oxidized alloy surfaces, enamel surfaces and dentin surfaces were used as bonded surface. Measurements of the polymerization contraction forces were done for 1 hour, and a stress at 1 hour after was recorded as a polymerization contraction force. It was considered as a bond failure that the polymerization contraction forces increased and then decreased by the time. The following conclusions were drawn : 1. Polymerization contraction forces of composite resins were decreased by the increase of filler contents. 2. Polymerization contraction forces were increased at thickened resin specimens, but it was not significant at over two millimeter thickness. 3. Bond strength of composite resins to the acid etched enamel surfaces exceeded the polymerization contraction forces and the reduced polymerization contraction forces due to the bond failure were not confirmed. 4. Failure of bond and reduced polymerization contraction forces occured on dentin.

복합레진의 중합 수축력과 수복물의 결합양상에 관한 연구 제 2 편 결합강도

박남수,우이형,최부병,임호남,최대균 大韓齒科器材學會 1993 대한치과재료학회지 Vol.20 No.2

Failure of bond between resinous restorative materials and tooth can be occured by the polymerization contraction forces larger than bond strengths. This study was planned to confirmed that the bond strengths between composite resin and acid etched enamel will be influenced by the polymerization contraction forces altered with filler contents and diameter of attached resin specimens. Ten kinds of experimental composite resins were prepared and bonded to bovine tooth enamel which were acid-etched. The diameter of resin specimens attached were 4 mm and 6 mm. The following conclusions were drawn : 1. Shear bond strengths were increased and then decreased with rise of filler contents, maximum shear bond strength was obtained by the 40% filled composite resin. 2. Unit shear bond strengths of resin specimens bonded with large area were lower than that of narrow area bonding. It was concluded that shear bond strengths to acid etched enamel can be influenced by the polymerization contraction forces.

균형측 교합장애로 인한 하악운동 및 저작근 활성도의 변화에 관한 연구

이윤정,박남수,최부병 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 was to investigate the influence of balancing interference on the mandibular movement and masticatory muscle activity. 5 subjects(male, average age of 24.3) without dysfuction in masticatory system were selected. The balancing interference was provided by construction of cast metal crown and onlay on the upper and lower first molars. Clinical examination, changes of mandibular displacement and velocity, and muscle activity were recorded and analyzed by means of BioPak system(Bioresearch Inc., Milwaukee Wisconsin, USA). The results were as follows ; 1. In clinical examination, various symptoms were reported by all subjects after application of interference. Almost symptoms were subsided after elimination of interference. 2. In the border movements in frontal plane, lateral border movement toward non-interference side was changed according to the interference after application of interference. Immediately after removal of interference, border movements' pattern was recovered as same as before experiment. 3. Duringguru chewing on the non-interference side, horizontal movement was decreased immediately after application of interference(p<0.05). 1 week after application of interference, horizontal movement was more decreased in 3 subjects and showed a chopping type masticatory stroke. But in 2subjects, horizontal movement was increased to avoid interference. 4. In EMG of the mandibular rest position, no significant changes were showed in the experiment period(p>0.05). 5. During gum chewing on the interference side, the activity of opposite temporal muscle was increased immediately after application of interference(p<0.05). 1 week after application of interference, The activity of ipsilateral temporal muscle and left and right masseter muscles was increased (p<0.05). 1 week after elimination of interference increased muscle activity was recovered about the same level as before experiment. 6. During gum chewing on the non-interference side, 1 week after application of interference, the activity of ipsilateral temporal muscle was increased (p<0.05). 1 week after elimination of interference, increased muscle activity was returned about the same level as before experiment.

심미성 수복재의 변연누출에 관한 비교 연구

임선희,임호남,최부병 慶熙大學校 齒科大學 1993 慶熙齒大論文集 Vol.15 No.1

This study evaluated the in vitro early marginal seal effectiveness in class V restorations of glass ionomer cement with or without dentin treatment, sandwich technique, and composite resin with several kinds of dentin bonding agents. The preparations were as uniformly as possible, with depth 1.5 mm, size 4 X 3mm. The one kind of glass ionomer cement for each type, 40% polyacrylic acid for dentin treatment, one kind of composite resin and three commercial dentin bonding agents were tested. Four groups were restored with only glass ionomer cement to evaluate the effect of dentin treatment and the type of glass ionomer on marginal leakage. Two groups were filled with composite resin with glass ionomer base by means of sandwich technique. And three groups were restored wih three commercial dentin bonding agent(Gluma�, Scotchbond 2�, and Tenure) and composite resin. The one that was filled with composite resin without use of dentin bonding agent was used as control group. Ten experimental groups including control group were established and each group had ten cavities. Eight of ten cavities of each group were used for marginal leakage test and two of ten, for investigation of marginal gap. Immediately after being restored, all of specimens were thermocycled 100 times through water bath of 5 ± It and 55 ± It for 38 sec in each bath. Then, marginal leakage of them were estimated by dye penetration method and scanning electron micrographs were taken to evaluate the marginal gap between dentin and restorations at X 1,000 magnification. On the summary of this study, the conclusions were as follows 1. Generally, more marginal leakage at the gingival margins was investigated than at the occlusal margin. While the groups filled with composite resin with dentin bonding agents showed less marginal leakage at occlusal margin, the groups restored with glass ionomer cement had the lower marginal leakage score at gingival margin. 2 When glass ionomer/composite resin sandwich restorations were compared with other restorations, they had least margial leakage at gingival margin. 3. Types of glass ionomer cement and dentin treatment did not affect on the marginal leakage at occlusal margin. At gingival margin, marginal leakage of light curing glass ionomer cement with dentin treat-merit showed significantly higher marginal leakage and wider marginal gap was seen in light curing glass ionomer cement than in chemical curing glass ionomer cement. 4. Though Tenure� exibited significantly less marginal leakage than Gluma� and Scotchbond 20, all of three dentin bonding agents seldom made wide marginal gap equally.

합성수지 반제품 생산 공장에서 발생한 반응성 기도과민 증후군

박소영,이종성,김부욱,이정오,박규철,최병순 大韓産業醫學會 2008 대한직업환경의학회지 Vol.20 No.4

배경 직업성 천식 감시체계의 활성으로 국내 직업성 천식의 보고가 증가하였음에도 불구하고 전체 직업성 천식의 약 5-18%를 차지한다고 알려진 반응성 기도과민증후군의 보고는 많지 않다 이에 저자들은 합성수지 반제품을 생산하는 사업장에서 발생한 반응성 기도과민 증후군 사례를 발견하였기에 이를 보고하는 바이다 증례 평소 건강하던 61세 남자 환자는 40세 때인 1987년부터 약 20년 간 합성수지 반제품을 생산하는 사업장에서 배합작업을 하였다 2007년 8월 PVC(polyvinyl chloride) DEHP (d₁-(2-ethylhexyl)phthalate) dibutyl tin maleate epoxidized soybean oil 등의 원료를 혼합하는 기계의 가열로 작업장내 연기가 자욱하게 된 사고가 발생한 직후 환자는 기침 콧물 호흡곤란 천명 등의 증상을 보였다 폐기능 검사에서는 FEV₁ 1.63 L(50%) FVC 3.81 L(82%) FEV₁/FVC 43% 소견을 보였으며 기관지 확장제 투여 후 FEV₁은 1.80 L로 투여 전에 비해 170 ml 10.4% 증가하였다 흡입용 스테로이드 및 기관지 확장제를 포함한 치료 시행 7개월 후에는 FEV₁ 3.21 L(99.3%) FVC 6.56 L(143.5%)로 회복되었으며 메타콜린 기관지 유발검사에서는 음성이었다 결론 혼합기 가열로 인해 발생한 원료물질 자체 또는 이들의 열분해산물에 고농도로 노출되면서 RADS가 발생한 것으로 판단된다. Background Reactive airways dysfunction syndrome (RADS). which represents between 5% and 18% of new-onset, work-related asthma remains underreported in spite of increasing reports of occupational asthma cases through occupational asthma surveillance in Korea We report a 61-year-old male who developed RADS after exposure to a high level of toxic gases from a workplace accident. Case The patient who had worked for 21 years at a PVC manufacture factory and had retained good health until Aug 22, 2007, when he was exposed to PVC (Polyvinyl chloride) DEHP (D₁ (2-Ethylhexyl) Phthalate) dibutyl tin maleate and epoxidized soybean oil gases from a heated mixer. Within several minutes of exposure, he developed coughing rhinorrhea dyspnea and wheezing. Pulmonary function tests (PFTs) showed an FVC of 3.81 L(82% of predicted) FEV₁ of 1.63 L/s (50% of predicted) FEV₁/FVC% of 43 % and FEV₁ of 1.80 L/s that increased by 170 ml and 10.4% in response to bronchodilator. After 7 months of treatment with inhaled steroids and bronchodilators, repeat PFTs showed an FVC of 6.56L(143.5% of predicted) FEV₁ of 3.21 L(99.3% of predicted) and FEV₁/FVC% of 48.9%. A methacholine challenge test was negative at a concentration of 25 ㎎/ml. Conclusion RADS occurred due to exposure to raw material vapors or their thermal decomposition products.

금속면의 표면처리 방법에 따른 금합금과 전장레진간의 전단결합강도에 관한 연구

박동원,임호남,우이형,최부병 慶熙大學校 齒科大學 1994 慶熙齒大論文集 Vol.16 No.1

The effect of five different surface treatments on the shear bond strength of the resin bond to Type IV Gold alloy was studied by bonding resin to metal. The metal surface was subjected to one of the following treatments and bonded ; (1) air abraded with 50?m alumina particles, (2) beads (3) beads and tin-plated at current density of 300mA/cm2, (4) tin-plated at current density of 300mA1cm (5)silicacoating with Sililink, and bonded with an MDP Opaque primer, CESEAD resin system. The bonded specimens were immersed in water for 23 hours after 1 hour resin curing and shear bond strength were recorded On the basis of this study, the following conclusions can be drawn; 1. Difference were found in the shear bond strength among all experimental groups. and bead group exihibited the highest shear bond strength and sand blasting group exhibited the lowest shear bond strength on five groups. 2. Bead group, mechanical bonding was significantly higher than that obtained with the samples, tinplating, silicacoating, and chemical bonding. 3. No statistically significant difference was found between the shear bond strengths obtained with bead and bead tinplating, and between tinplating and silicacoating.

레진접착제를 도포한 상아질에 대한 합착용 시멘트의 전단결합강도

김교철,우이형,이성복,최부병 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 was to confirm the formation of hybrid layer and resin tags in dentin tissue and the possibility of bonding between luting cements used for the prosthesis and the resinous surface coated with resin bonding agents to prevent the dentin hypersensitivity after abutment preparation. Some resin bonding agents, which may have the possibility of bonding with polyacrylic acid as a liquid ingredient of polycarboxylate and glass ionomer cements, were selected. All-Bond desensitizer containing NTG-GMA and BPDM, Scotch-Bond Multipurpose plus containing HEMA, and XR-bond containing organophosphate were selected as a coating agent. Dental cements were zinc phosphate, polycarboxylate, and glass ionomer cement. After the exposed dentin surface of premolars was ethced with 10% phosphoric acid and coated with resin bonding agents, the morphology of treated surfaces and the resin tags and hybrid layers on sectioned surfaces were observed by SEM. Shear bond strength between the resin bonding agents and 3 kinds of cements was measured 24 hours after bonding. On the debonded surfaces of the shear bond strength tested specimens, the cement tags and the bonding sites between the resin materials and cements were examined by SEM. Following conclusions were drawn 1. Coating of dentin with resin bonding agents had no effect on the shear bond strength of zinc phosphate cement. 2. Both of polycarboxylate and glass ionomer cements showed the increased shear bond strength by the dentinal coating with Scotch-Bond Multipurpose plus containing HEMA. However, in the case of dentinal coating with some agents containing NTG-GMA and BPDM or organophosphate, polycarboxylate cement exhibited the lowered shear bond strength, and glass ionomer cement showed the unchanged shear bond strength. 3. Complete obstructions of dentinal tubules were observed on the dentin coated with All-Bond desensitizer or XR-bond, but distinct shape of the orifices of dentinal tubules was observed consistently on the dentin coated with Scotch-Bond Multipurpose plus. 4. The hybrid layer was thickest on the dentin coated with Al1'Bond desensitizer, and the length of resin tags was longest on the dentin coated with Scotch-Bond Multipurpose plus. 5. On the debonded specimens which had been bonded with polycarboxylate cement or glass ionomer cement after coating with Scotch-Bond Multipurpose plus, the cement tags and the bonding sites between the resinous surface and the cements could be examined.

증례 : 접착 Bridge 2 예 ( Case Report : 2 Cases of Adhesion bridge )

최부병(Boo Byung Choi),우이형(Yi Hyung Woo),최대균(Dae Gyun Choi),박남수(Nam Soo Park) 경희대학교 경희의료원 1986 慶熙醫學 Vol.2 No.3