성견에서 발치 직후 Titanium plasma sprayed IMZ 임프란트 이식시 조직유도 재생술에 따른 골 재생력에 관한 연구

황희성,정문규,Hwang Hie-Seong,Chung Moon-Kyu 대한치과보철학회 1992 대한치과보철학회지 Vol.30 No.3

The purpose of this investigation was to evaluate the effect of the porous hydroxyapatite particles (Interpore $200^{(R)}$) and guided tissue regeneration membrane ($Gore-Tex^{TM}$ augmentation material) on amount and shape of generating new bone adjacent to implant. Implants were placed immediately after extraction in the bilateral 3rd, 4th premolars of the mandible of the adult dogs. In all experimental groups, artificial bony defects were formed at the buccal cortex area, 3.3mm in width and 3.0mm in depth. In the control group : sutured without HA particles & membranes after placing implants, the experimental group 1 : membrane was place over the artificial bony defect, the experimental group 2 : bony defect was filled with HA particles and covered with membrane. The examination of bone-implant interfaces using light microscope and fluorescent microscope concluded as follows. 1. In all three experimental groups, osseointegration was observed without epithelial migration. 2. In the healing degree of bony defect area, the experimental group 1, 2 showed more prominent healing than control group, and the experimental group 1 showed the most excellent bone formation. 3. In fluorescent microscopic finding, bone remodeling was observed in regenerated bone tissue at defect area of experimental group 1, but in experimental group 2, irregular, discontinuous linear fluorescence was observed at the lower portion of defect area and sign of bone remodeling was weak.

반조절성 교합기의 심미적 기준 평면에 관한 연구

황희성,전영찬,정창모,Hwang, Hie-Seong,Jeon, Young-Chan,Jung, Chang-Mo 대한치과보철학회 1996 대한치과보철학회지 Vol.34 No.3

The purpose of this study is to evaluate suitable anterior reference point similar to esthetic reference plane of the patient while transferring the suitable facebow. So those who live in Pusan with the normal occlusal relationship were chosen as subjects. The esthetic reference planes determined by the participants themselves and the superior reference line (anterior reference point) in Hanau & Denar articulator were compared with F-H plane in the standard lateral cephalogram. The results were as follows. 1. The angle between the esthetic reference plane and F-H plane was $2.81{\pm}5.7^{\circ}$. 2. The reference line, 43mm from Beyron point to the edge of the upper incisor, was the reference plane that had the closest paralleled relationship with the esthetic reference plane. 3. Transferring with ear piece type face-bow, the anterior reference point that showed the esthetic reference plane was 17mm below orbitale or 43mm above, the edge of the upper incisor.

Hanau 96-H<SUB>2</SUB>교합기에 상악 모형 부착시 교합면 경사각에 대한 비교 연구

황희성(Hie Seong Hwang),이호용(Ho Yong Lee) 대한치과의사협회 1987 대한치과의사협회지 Vol.25 No.9

비정복성 관절원판 변위환자들에서 악관절세척술의 술후 예측 인자들에 관한 연구

김철훈(Cheol-Hun Kim),황희성(Hie-Seong Hwang),신상훈(Sang-Hun Sin) 대한구강악안면외과학회 2003 대한구강악안면외과학회지 Vol.29 No.6

Purpose: The purpose of this study was to find the predictors for successful arthrocentesis for anterior disc displacement without reduction(ADD without Reduction) of the temporomandibular joint (TMJ). Patients and Methods: Arthrocentesis and lavage was carried out in 25TMJs of 22patients whose MRI findings were all anterior disc displacement without reduction. The effectiveness of the treatment was evaluated in terms of the postoperative range of maximal mouth opening (MMO) and the degree of postoperative pain score. Predectors which was analyzed were age, duration of painful locking, MMO, the degree of pain, perioperative clicking and the amounts of irrigation fluid. Results: 18cases (72%) was included to criteria for success. There were no significant differences in age, duration of locking, MMO and the degree of pain statistically. But In 15cases(83%) of successful cases, amouts of irrigated solution recovered to normal MMO were less than 150ml. And In 8cases (44%) of successful cases, perioperative clicking was appeared. Conclusion: Amounts of irrigated solution recovered to normal MMO and the appeareance of perioperative clkicking may be predictors of the successful results of arthrocenetesis of ADD without reduction of TMJ.

부가중합형 Silicone putty 인상재를 이용한 인상채득 방법의 정확성에 관한 연구

제홍지,정창모,전영찬,황희성,Je, Hong-Ji,Jeong, Chang-Mo,Jeon, Young-Chan,Hwang, Hie-Seong 대한치과보철학회 1996 대한치과보철학회지 Vol.34 No.2

In order to compare the accuracy of impression method using addition silicone putty impression material, metal master die was fabricated with 4 cylindrical abutments that were similar in shape to mandibular arch. Among the 4 abutments, two(A, D) with 8mm width and 7mm height were formed in the 2nd molar regions and the other two(B, C) with 6mm width and 7mm height were on the canine regions. Impressions were taken using one-step putty wash impression technique and two-step putty wash impression technique by three different types of impression materials(Perfect, Express, Exaflex). Upon measuring the distance between the abutments on the model by three dimensional measuring machine, the percent of devitaion of the materials were obtained, rendering the following results. The results obtained are as follows : 1. There was no significant difference in accuracy in regard with the impression method between one-step putty wash impression technique and two-step putty wash impression technique using addition silicone putty impression material. 2. There were no difference in accuracy among with three different addition silicone putty impression materials. 3. All the distances between abutments on improved stone models increased in comparison with those on the metal master model.

두개의 골유착성 임프란트를 이용한 하악 OVERDENTURE에서 ATTACHMENT 설계에 따른 임프란트 지지조직의 삼차원적 광탄성 응력분석

신규학,정장모,전영환,황희성,Shin, Kyoo-Hag,Jeong, Chang-Mo,Jeon, Young-Chan,Hwang, Hie-Seong 대한치과보철학회 1996 대한치과보철학회지 Vol.34 No.1

The purpose of this investigation was to analyze stress distribution in implant supporting tissue according to different types of attachments such as combination bar attachment, Hader bar attachment, O-Ring attachment and Dal-Ro attachment that are used in mandibular overdenture by using two osseointegrated implants, to study the influence that POM IMC used in bar type attachment has in implant supporting tissue and compare the preceding analyses to find out an effective stress distribution method. Three dimensional photoelastic method was used to obtain the following results. (A) Analysis of stress distribution according to attachment type 1. Under vertical load condition, compressive stress was seen at implant supporting area of working side on all the photoelastic models but in Hader bar attachment tensional stress was seen at distal upper area of implant supporting area. Relatively Hader bar and O-Ring attachment showed even stress distribution pattern. 2. Under vertical load condition, compressive stress at implant apex area and tensional stress at implant lateral supporting area were seen at nonworking side of all models. 3. Under $25^{\circ}$ lateral load condition, general compressive stress was seen at working side implant supporting area in most of the models, especially at distal upper supporting area higher compressive stress concentration was seen in combination bar attachment and tensional stress concentration, in Hader bar attachment. 4. Under $25^{\circ}$ lateral load condition, compressive stress at implant apex area and tensional stress at implant lateral supporting area were seen at nonworking side of all models, except O-Ring model which showed compressive stress only. (B) Influence of POM IMC to stress distribution in bar type attachment 5. Under vertical load condition, better stress distribution pattern was seen at working side of combination bar and Hader bar attachment model using POM IMC. 6. Under vertical load condition, stress value was increased at nonworking side of combination bar attachment model using POM IMC and tendency of increasing compression was seen at nonworking side of Hader bar attachment model using POM IMC. 7. Under $25^{\circ}$ lateral load condition, better stress distribution pattern was seen at working side of combination bar attachment model using POM IMC but tendency of increasing stress was seen on working side of Hader bar attachment model using POM IMC. 8. Under $25^{\circ}$ lateral load condition, stress reduction was seen at nonworking side of combination bar attachment model using POM IMC but tendency of increasing stress was seen at nonworking side of Hader bar attachment model using POM IMC.