No abstract available.
Herniorrhaphy* ; Polyethylene Terephthalates*

No abstract available.
Aorta ; Polyethylene Terephthalates ; Transplants

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 ; Diastema ; Polyethylene Terephthalates ; Tooth

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

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

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

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

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 ; Carboxylic Ester Hydrolases ; Polyethylene Terephthalates ; Thermobifida

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

We conducted experimental studies to evaluate the possibility of Dacron patch for artificial sclera and to gain basic data for practical approach. Forty eyes of twenty rabbits were randomly assigned to experimental or control eye in both eyes. The lamellar-thickness scleral resection was performed and followed by implantation of Dacron and homologous scleral patch respectively. We examined them after one, two, four and 12 weeks. Grossly adhesion of Dacron patch was stable after four weeks. Histologically Dacron graft evoked an outer capsule and a well-vascularized granulomatous foreign body reaction. There were fibrous and vascular ingrowth securety anchored graft to bed and adhesion was uniform and firm throughout the tissue. Attachment of homolgous graft to bed was poor after 1 week but stable after two weeks. Dacron patch appears to be a good alternative to homologous sclera for scleral reinforcement.
Fibroblasts ; Foreign-Body Reaction ; Polyethylene Terephthalates* ; Rabbits ; Sclera ; Transplants*