1.Herniorrhaphy with dacron patch.
Won Kyoo JUNG ; Min Hyuk LEE ; Ik Soo KIM ; Kyung Bal HUR
Journal of the Korean Surgical Society 1993;45(2):263-270
No abstract available.
Herniorrhaphy*
;
Polyethylene Terephthalates*
2.Experimental study about dacron graft on cannine aorta
Jung Kee CHUNG ; Oh Hoong KWON ; In Kyu HONG ; Sung Joon KIM ; Soo Tae KIM ; Yong Il KIM ; Jin Wook CHOI ; Kyu Baek LEE ; Byung Koo MIN ; Song Cho KIM ; Rae HONG ; Jin Ho LEE
Journal of the Korean Society for Vascular Surgery 1991;7(1):65-73
No abstract available.
Aorta
;
Polyethylene Terephthalates
;
Transplants
3.Diastema closure with direct composite: architectural gingival contouring.
Journal of Korean Academy of Conservative Dentistry 2011;36(6):515-520
One of the most challenging task in closing anterior diastema is avoiding "black triangle" between the teeth. This paper reports a case that the closure of diastema in anterior teeth could be successfully accomplished using direct adhesive restorations and gingival recontouring. The traditional technique using Mylar strip was modified to increase the emergence profile with natural contours at the gingival-tooth interface. Mylar strip was extended out of the sulcus by approximately 1 mm high from the gingival margin, and a small cotton pellet was used to provide the emergence contour. This modified approach is acceptable for the clinical situation.
Adhesives
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Diastema
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Polyethylene Terephthalates
;
Tooth
4.Trido Mitral Valve Replacement with Dacron Collar Prosthetic Valve due to Paravalvular Leak.
Yun Suk BAE ; Sung Chol JUNG ; Woo Sik KIM ; Sung Hyock CHUNG ; Jung Ho LEE ; Byung Yul KIM
The Korean Journal of Thoracic and Cardiovascular Surgery 2002;35(11):822-825
The paravalvular leak after redo mitral prosthetic valve replacement is rare but serious complication when it does happen. This condition should be corrected surgically to increase life span and improve symptoms. But simple closure or patch closure of paravalvular leak are not effective in cases of weak annulus or broad defect. We report 3 cases of trido mitral valve replacement using mechanical valve with its sewing ring expanded by a collar of Dacron sheet. The prosthetic sewing ring is anchored on the weak mitral annulus with multiple interrupted sutures, while the Dacron collar is contineuously sutured to the left atrial wall for blood tight sealing. All of the three cases showed event free postoperative course.
Mitral Valve*
;
Polyethylene Terephthalates*
;
Reoperation
;
Sutures
5.Trido Mitral Valve Replacement with Dacron Collar Prosthetic Valve due to Paravalvular Leak.
Yun Suk BAE ; Sung Chol JUNG ; Woo Sik KIM ; Sung Hyock CHUNG ; Jung Ho LEE ; Byung Yul KIM
The Korean Journal of Thoracic and Cardiovascular Surgery 2002;35(11):822-825
The paravalvular leak after redo mitral prosthetic valve replacement is rare but serious complication when it does happen. This condition should be corrected surgically to increase life span and improve symptoms. But simple closure or patch closure of paravalvular leak are not effective in cases of weak annulus or broad defect. We report 3 cases of trido mitral valve replacement using mechanical valve with its sewing ring expanded by a collar of Dacron sheet. The prosthetic sewing ring is anchored on the weak mitral annulus with multiple interrupted sutures, while the Dacron collar is contineuously sutured to the left atrial wall for blood tight sealing. All of the three cases showed event free postoperative course.
Mitral Valve*
;
Polyethylene Terephthalates*
;
Reoperation
;
Sutures
6.Repair of Aortic Periprosthetic Leakage with Pseudoaneurysm: A case report.
Hyuck KIM ; Hyung Chang LEE ; Won Sang CHUNG ; Young Hak KIM ; Jung Ho KANG
The Korean Journal of Thoracic and Cardiovascular Surgery 2005;38(9):637-639
There are several methods of repairing in aortic periprosthetic leakage after aortic valve replacement. We present a case in which the aortic periprosthetic leakage with pseudoaneurysm was repaired with dacron patch.
Aneurysm
;
Aneurysm, False*
;
Aortic Valve
;
Polyethylene Terephthalates
7.Changes in Polytetrafluoroethylene and Dacron GraftDiameters after Arterial Bypass Surgery.
Dong Hun KIM ; Kyung Bok LEE ; Ki Ick SUNG ; Young Wook KIM ; Kwang Bo PARK ; Young Soo DO ; Dong Ik KIM
Journal of the Korean Society for Vascular Surgery 2008;24(1):18-24
PURPOSE: We compared postoperative diameter changes between polytetrafluoroethylene (PTFE) and Dacron grafts after aortic reconstruction and femoropopliteal bypass. METHOD: We analyzed 173 PTFE grafts and 73 Dacron grafts (165 aortic grafts, 81 peripheral grafts). The mean follow-up period was 28.4 months. RESULT: The mean diameter change in the Dacron grafts (6.6+/-3.0 SD mm) was larger than that in the PTFE grafts (3.7+/-1.8 SD mm). There was a statistically significant difference in the diameter change of PTFE and Dacron aortic grafts (p<0.001). The diameter changes in PTFE peripheral grafts were not significant (p=0.065). There was a significant linear correlation between diameter changes in the Dacron aortic grafts and follow-up duration (correlation coefficient=0.238, p=0.043). Diameter changes in the PTFE grafts showed no linear correlation with follow-up duration, irrespective of grafting range (aortic grafting correlation coefficient=0.048, p=0.646; peripheral grafting correlation coefficient=0.011, p=0.925). CONCLUSION: This study suggests that PTFE has superior durability compared to Dacron, and the change in graft diameter should be taken into consideration when the diameter of the graft needed for aortic reconstruction is selected.
Follow-Up Studies
;
Polyethylene Terephthalates
;
Polytetrafluoroethylene
;
Transplants
8.The application of carbohydrate binding module-Thermobifida fusca cutinase fusion protein in polyethylene terephthalate degradation.
Ying ZHANG ; Zhanzhi LIU ; Guangyao LI ; Xueni FU ; Yucheng ZHANG ; Zhiyuan WANG ; Yaping TIAN ; Jing WU
Chinese Journal of Biotechnology 2022;38(1):217-225
With the development of global economy, the dramatically increased production of polyethylene terephthalate (PET) plastics has led to a remarkably increased amount of plastic waste. PET waste can be treated by landfill, incineration, or biodegradation. While landfilling and incineration may cause secondary pollution, biodegradation has since received increased attentions due to its environmental friendliness. Recent studies have indicated that the carbohydrate binding module (CBM) can effectively enhance the binding of PET degrading enzymes to PET, and consequently increasing PET degradation rate. Here we constructed a fusion protein BaCBM2-Tfuc containing the BaCBM2 from Bacillus anthraci and the cutinase Tfuc from Thermobifida fusca, by megaprimer PCR of whole plasmids (MEGAWHOP). Notabaly, the PET film degradation efficiency (at 60 ℃) of BaCBM2-Tfuc was 2.8 times that of Tfuc. This study may provide technical support for constructing fusion proteins capable of efficiently degrading PET.
Carbohydrates
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Carboxylic Ester Hydrolases
;
Polyethylene Terephthalates
;
Thermobifida
9.Commentary: polymer binding modules accelerate enzymatic degradation of poly(ethylene terephthalate).
Yi LU ; Ruizhi HAN ; Ulrich SCHWANEBERG ; Yu JI
Chinese Journal of Biotechnology 2023;39(5):1883-1888
The large scale production and indiscriminate use of plastics led to serious environmental pollution. To reduce the negative effects of plastics waste on the environment, an approach of enzymatic degradation was put forward to catalyze plastics degradation. Protein engineering strategies have been applied to improve the plastics degrading enzyme properties such as activity and thermal stability. In addition, polymer binding modules were found to accelerate the enzymatic degradation of plastics. In this article, we introduced a recent work published in Chem Catalysis, which studied the role of binding modules in enzymatic hydrolysis of poly(ethylene terephthalate) (PET) at high-solids loadings. Graham et al. found that binding modules accelerated PET enzymatic degradation at low PET loading (< 10 wt%) and the enhanced degradation cannot be observed at high PET loading (10 wt%-20 wt%). This work is beneficial for the industrial application of polymer binding modules in plastics degradation.
Polyethylene Terephthalates/metabolism*
;
Polymers
;
Plastics
;
Ethylenes
10.Effect of glycerin on the surface hardness of composites after curing.
Journal of Korean Academy of Conservative Dentistry 2011;36(6):483-489
OBJECTIVES: The purpose of this study was to examine the effect of glycerin topical application on the surface hardness of composite after curing. MATERIALS AND METHODS: A composite (Z-250, 3M ESPE) was packed into a disc-shaped brass mold and light cured according to one of the following protocols. Group 1 (control) was exposed to air and light cured for 40 sec, group 2 was covered with a Mylar strip and light cured for 40 sec, group 3 was surface coated with glycerin and light cured for 40 sec, and group 4 was exposed to air and light cured for 20 sec and then surface coated with glycerin and cured for additional 20 sec. Twenty specimens were prepared for each group. The surface hardnesses of specimens were measured with or without polishing. Five days later, the surface hardness of each specimen was measured again. Data were analyzed by three-way ANOVA and Tukey's post hoc tests. RESULTS: The surface hardnesses of the unpolished specimens immediately after curing decreased in the following order: group 2 > 3 > 4 > 1. For the polished specimens, there was no significant difference among the groups. Within the same group, the hardness measured after five days was increased compared to that immediately after curing, and the polished specimens showed greater hardness than did the unpolished specimens. CONCLUSIONS: The most effective way to increase the surface hardness of composite is polishing after curing. The uses of a Mylar strip or glycerin topical application before curing is recommended.
Copper
;
Fungi
;
Glycerol
;
Hardness
;
Light
;
Polyethylene Terephthalates
;
Zinc