1.Bone inducing activity and antigenicity of native bone morphogenetic protein after various storage times
Hongxun SANG ; Dan LI ; Yunyu HU
Chinese Journal of Orthopaedics 1996;0(09):-
0.05). 3)ALP assay showed that the 7th,14th and 28th day of bBMP implantation, the ALP activities of bBMP in implantation groups were relatively higher than that of the control group (P0.05). 4)Histologically,after the 7th day implantation, a large quantity of mesenchymal cells differentiated with active chondrogenesis. The 14th day later, a large amount of cartilage and woven bone formed, and laminar bone and bone marrow were seen on day 28 after implantation. Conclusion The bBMP possesses active bone induction properties even after 10 years storage in 4℃ . The low-level antibodies of the recipient mice can be detected after implanted with bBMP, but the bone inducing activities are not affected. This may be a reference data for purification and clinical application of native BMP.
2.Comparison of Intraocular Pressure Measurements of Tono-Pen and Perkins Tonometer in Children Under the General Anesthesia.
Jin Sang KIM ; Dan Ho LEE ; Hae Ran CHANG
Journal of the Korean Ophthalmological Society 1997;38(9):1590-1594
Tono-pne and Perkins tonometer have been widely accepted to measure the intraocular pressure(IOP) of children under the general anesthesia because of their portability. We evaluated the difference of IOP between two devices and the IOP variability in 39 children(77 eyes) under age 13 who had undergone surgery for strabismus or entropin under the general anesthesia. One observer measured the IOP three times alternately, and the order of measurement was randomized. Only 5% of Tono-pens coefficient of variance was considered valuable. The range of Tono-pen IOPs was 9~22mmHg, and the average was 15.41+/-3.23mmHg. The range of Perkins IOPs was 4~20 mmHg, with the average of 12.47+/-3.31mmHg. The difference between two methods on average was 2.94mmHg. Tono-pen IOPs were significantly greater than those recorded by Perkins tonometer, but both were within normal range. The IOP variability was not significantly different between two devices. Therefore both methods can be applied effectively in a clinical setting after sedation or general anesthesia of uncooperative children.
Anesthesia, General*
;
Child*
;
Humans
;
Intraocular Pressure*
;
Reference Values
;
Strabismus
3.Development of an ELISA to quantitatively determine the nucleoprotein of rabies virus
Sufang HAN ; Jun LI ; Qiang GAO ; Lili SONG ; Dan YU ; Jianli SANG
Chinese Journal of Clinical Laboratory Science 2006;0(06):-
Objective To develop a double-antibody sandwich ELISA for determining the concentration of nucleoprotein (NP) of rabies virus in various products of rabies vaccine.Methods The purified rabies antibodies from a rabbit were used to coat microwell plates. Horseradish peroxidase-conjugated anti-NP monoclonal antibody was used to probe the NP bound to coated antibodies.The assay was used to quantitatively determine the concentration of NP of rabies virus.Results The results showed that the coefficient of linear correlation was higher than 0.97.The optimal linear range was 0.000625~0.01 IU/ml and the detection limit was 0.000625 IU/ml. The recovery rate was 102~109% and the coefficient of variation was only 7.2%~9.4%.No cross reactions were observed with bovine serum,bovine serum albumin,ovalbumin,refined solution of influenza vaccine,encephalitis B vaccine,and hepatitis A vaccine.Conclusions The results indicated that the assay is specific,sensitive,accurate,reproducible,and stable,and could be suitable for quantitative determination of different rabies vaccine's processes products.
4.The effects of mechanical stress on cultured bone cell populations.
Korean Journal of Orthodontics 1994;24(1):105-114
The movement of teeth during orthodontic treatment requires bone remodeling process of bone formation and bone resorption. To find out the changes occuring in the cell itself, mechanical stress was applied to the cell populations involved in the bone metabolism. Bone tissue cell populations were isolated from fetal rat calvaria and divided into OC and OB groups. Following results were obtained from measuring the changes in acid & alkaline phosphatease activity, cyclic AMP and PGE2 production in time lapse after the application of mechanical stress. 1. In case of the marker enzyme of specific bone tissue cell, acid phosphatase activity was high in OC group and alkaline phosphatase activity was high in OB group. 2. After the mechanical stress was applied, acid phosphatase activity was decreased in both OC and OB groups and alkaline phosphatase activity was increase in OB group. 3. When the mechanical stress was applied for 15, 30 and 60 minutes, the production of PGE2 increased in both OC and OB groups, as the time span increased. 4. When the mechanical stress was applied for 20 and 40 minutes, the production of PGE2 increased in both OC and OB groups, as the time span increased.
Acid Phosphatase
;
Alkaline Phosphatase
;
Animals
;
Bone and Bones
;
Bone Remodeling
;
Bone Resorption
;
Cyclic AMP
;
Dinoprostone
;
Metabolism
;
Osteogenesis
;
Rats
;
Skull
;
Stress, Mechanical*
;
Tooth
5.The efficiency comparision of continuous glucose monitoring system and blood glucose self-monitoring in evaluating blood glucose excursion in type 1 diabetes mellitus complicated with pregnancy
Liping LAI ; Fengxiu JIANG ; Xiangqing FENG ; Yiyi YE ; Cuiyin LI ; Dan SANG ; Zeyuan LU
Chinese Journal of Postgraduates of Medicine 2016;39(3):242-245
Objective To explore the efficiency of continuous glucose monitoring system(CGMS) and blood glucose self-monitoring (SMBG)in evaluating blood glucose excursion in type 1 diabetes mellitus (T1DM) complicated with pregnancy. Methods Twenty-five patients having suffered from T1DM complicated with pregnancy were selected randomly during June 2012 to July 2015. All subjects underwent blood glucose monitoring by CGMS and SMBG for 72 h, including the data of blood glucose before meal, 2 h post-meal blood glucose (2hBG) and blood glucose at 2:00 AM. Results The level of the highest blood glucose in CGMS was significantly higher than that in SMBG:(10.60 ± 2.11) mmol/L vs. (7.50 ± 1.18) mmol/L, P<0.01. The level of the lowest blood glucose in CGMS was significantly lower than that in SMBG:(3.60 ± 1.06) mmol/L vs. (4.50 ± 1.15) mmol/L, P<0.01. The level of mean blood glucose in CGMS and SMBG had no significant difference:(7.20 ± 1.18) mmol/L vs. (7.30 ± 1.15) mmol/L, P>0.05. The rate of hypoglycemia(blood glucose<3.3 mmol/L) in CGMS was 4.6%, and in SMBG was 1.9%. Through adjusting the treatment by CGMS, the blood glucose before meal, 2hBG and blood glucose at 2:00 AM at 49-72 h were significantly lower than that at 0-24 h (P<0.05). Conclusions Compared with SMBG, CGMS has a relatively larger blood glucose monitoring range and can sensitively evaluate blood glucose excursion, CGMS provides a scientific basis to develop a more rational and effective strategies for controlling diabetes.
6.A comparative study on the bite force after modified Widman's flap.
Sang Jin PAEK ; Sung Bin LIM ; Chin Hyung CHUNG ; Ki Seok HONG
The Journal of the Korean Academy of Periodontology 2005;35(2):371-381
The masticatory function of tooth is maintained by the periodontal health, and periodontal health is also maintained by the masticatory function. Bite forces are withstanded by the PDL, and this thought to be through the viscoelastic theory. Mobility test and Bite force test are used to evaluate the viscoelastic theory of the PDL. In this study, the bite force test was used. In the same conditions of quantity of the supporting tissue, the maximum bite force according to the quality of the supporting tissue was evaluated. The study was conducted on 40 patients with moderate adult periodontitis, who were indications to the modified widman flap treatment. The maximum bite force in the premolar and molar regions were tested before treatment, 3weeks and 4 weeks after treatment. and the results were as follows. 1. In the premolar region, 3 weeks and 4 weeks after treatment showed higher maximum bite force than before treatment. And in the molar region the maximum bite force decreased 3 weeks after treatment, but increased after 4 weeks, compared to before treatment. 2. In the 1st premolar, there were only significant difference between before and 3 weeks after treatment, and between and 4 weeks after treatment. 3. In the 2nd premolar, there were only significant difference between before and 3 weeks after treatment, and between and 4 weeks after treatment. 4. In the 1st molar, there were no significant difference between before, 3 weeks after treatment, 4 weeks after treatment. 5. In the 2nd molar, there were no significant difference between before, 3 weeks after treatment, 4 weeks after treatment. From the results above, it shows that there were improvements in the maximum bite force through specific periodontal treatments, and thus it can be considered in clinical situations, that selection of the prosthodontic material, decisions of extraction, evaluation of the prognosis after periodontal treatment is a helpful method.
Bicuspid
;
Bite Force*
;
Chronic Periodontitis
;
Humans
;
Molar
;
Prognosis
;
Prosthodontics
;
Tooth
7.Analysis of surface form change after performing prophylaxis procedure on implant surface using various oral hygiene instruments.
Sun Goo LEE ; Sung Bin LIM ; Chin Hyung CHUNG ; Sang Ho KWON
The Journal of the Korean Academy of Periodontology 2004;34(1):1-17
It is improtant that performing prophylaxis procedure on an infected implant surface in order to treat periimplantitis should not change the surface roughness and composition, so that the surface can be recovered to almost same condition as initial implant surface. This thesis, therefore, studied an effect of various oral hygiene instrument on implant surface. A surface roughness measurement instrument and an injection electron microscope were used to observe a change on surface. The purpose of this study was to obtain a clinical guideline during implant care and peri-implantitis treatment. The result were as follows 1. Ra values (surface roughness value) at experimental group 1, group 2, and group 5 were increased significantly as compared with comparison group (p<0.05). 2. When compared experimental group 1 with each exprimental groups at which prohylaxis procedure was performed, mean values of Ra at experimental group 2, group 3, group 6, and group 7 were decreased significantly(p<0.05). 3. Mean value of Ra was lowest at experimental group 2, and highest at experimental group 2, and highest at experimental group 5. 4. Analysis of SEM showed that was significant surface change at experimental group 2, group 3, group 4, group 5, and group 6 as compared with comparison group(X1000). 5. Analysis fo EDX showed that a quantity of Ti on surface for experimental group 6 was very similar to that for comparison group. In conclusion, air-powder abrasive and citric acid, plastic instrument are safe methods to use for performing prophylaxis procedure on implant care or for cleaning and sterilization process on treatment of peri-implantitis, based on the result that those method did not affect implant surface roughness and Ti composition.
Citric Acid
;
Oral Hygiene*
;
Peri-Implantitis
;
Plastics
;
Sterilization
8.Histopathologic Study of the Effect of two Bovine Bone Powder on Healing of Extraction Socket of Dogs.
Sang Hun LEE ; Sung Bin LIM ; Chin Hyung CHUNG ; Chong Heon LEE
The Journal of the Korean Academy of Periodontology 2002;32(2):339-350
Recently the esthetic demands of clinicians and patients made the surgeon try to regenerate bone defects and gingival tissue after extraction. For that, many surgical methods were used and socket preservation have been evaluated simple, effective and good prognosis in the implant placement. Bone grafting was one of the methods for socket preservation. This study was to evaluate the histologic view of the effects on healing of the extraction sockets when deproteinized bovine bone mineral and tetracycline coated deproteinized bovine bone mineral was implanted 1. In control group, at 4 weeks after implantation, the extraction sockets were filled with connective tissue. And after 8 weeks, osteoblasts were observed in newly formed trabecular among the fibrous connective tissue in the extraction sockets. 2. In experimental 1 group, there was connective tissue and new bone trabecular around newly formed woven bone at 4 weeks. And many osteoblasts were observed in various direction at 8 weeks. 3. In experimental 2 group, there was a lot of new bone made around the bone powder after 4 weeks, and the thicker bone trabecular, lamellar bone and irregular osteoblasts arrangement were observed at 8 weeks. From the results of this study, tetracycline coated BBP would be better than the other groups in the lamellar bone formation and be faster in the bone formation rate.
Animals
;
Bone Transplantation
;
Connective Tissue
;
Dogs*
;
Humans
;
Osteoblasts
;
Osteogenesis
;
Prognosis
;
Tetracycline
9.A Comparative Study of Clinical Sffects Following Periodontal Surgery with and without Dressing.
Sang Bum BAE ; Sung Bin LIM ; Chin Hyung CHUNG
The Journal of the Korean Academy of Periodontology 1999;29(3):693-701
Since they were introduced by Ward in 1923, periodontal dressing have been routinely used following the periodontal surgery to avoid pain, infection, desensitizing teeth, inhibiting food impaction of the surgical areas, and immobilizing injured areas. Recently, however, the value of periodontal dressings and their effects on periodontal wound healing have been questioned, several authors have been reported that the use of dressing has little influence on healing following periodontal surgical procedures. In addition, there is evidence that when good flap adaptation is achieved, the use of a periodontal dressing does not add to patient comfort nor promote healing. The purpose of this study was to evaluate patient postoperative pain experience and discomfort with and without the use of periodontal dressing following periodontal surgery. Twenty-eight patients, 11 male and 17 female. were selected for this study; The age range was 31 to 56, with an average of 40.2years. Patient selection was based on existence of two bilateral sites presenting similar periodontal involvement, as determined by clinical and radiographic assessment, and requiring comparable bilateral surgical procedures. Using a splitmouth dressing. one site received a periodontal dressing while the other site did not. Pain assessment was made according to a horizontal, rating scale(0-10). After at least a two - week period, the second surgical precedure was performed using the alternate postoperative treatment. At the conclusion of the trial, a self-administered questionnaire on postoperative experience was administered, and were asked of their preference of either, dressed or undressed. The results were as follows: 1. A similar trend for mean pain and discomfort scores as assessed by patients both dressed and saline-treated procedures was evident during 7-day postsurgical period. 2. Statistical analysis of differences between the dressed side and saline-treated side with respect to pain, discomfort and patient's experiences revealed that both treatment sides behaved similarly at any postoperative day(P>0.05). 3. Considering the patient's preference, on the basis of pain and discomfort experienced, 43% preferred the saline-mouthwash and 32% preferred the dressing, 25% showing no preference for either the dressing or the saline-mouthwash. There is evidence to support the use of a periodontal dressing in retention of an apically positioned flap by preventing coronal displacement, or its use to provide additional support to stabilize a free gingival graft. However, there will always be a use for periodontal dressing although routine use of dressings may decrease because of better surgical techniques and the use of antibacterial mouth rinses.
Bandages*
;
Female
;
Humans
;
Male
;
Mouth
;
Pain Measurement
;
Pain, Postoperative
;
Patient Selection
;
Periodontal Dressings
;
Surveys and Questionnaires
;
Tooth
;
Transplants
;
Wound Healing
10.A Case of Wilson Disease.
Cheol Soo DAN ; Sang Hoon LEE ; Woo Yeong CHUNG ; Soon Yong LEE ; Jong Eun JOO ; Hye Jae CHO
Journal of the Korean Pediatric Society 1988;31(11):1502-1508
No abstract available.
Hepatolenticular Degeneration*