| Lai WFT |
------>authors3_c= ------>paper_class1=1 ------>Impact_Factor=0.692 ------>paper_class3=2 ------>paper_class2=1 ------>vol=28 ------>confirm_bywho=chlin ------>insert_bywho=??? ------>Jurnal_Rank=89.6 ------>authors4_c= ------>comm_author=1 ------>patent_EDate=None ------>authors5_c= ------>publish_day=1 ------>paper_class2Letter=None ------>page2=266 ------>medlineContent= ------>unit=E0200 ------>insert_date=19991209 ------>iam=1 ------>update_date= ------>author=??? ------>change_event=4 ------>ISSN= ------>authors_c= ------>score=496 ------>journal_name=Journal of Oral Rehabilitation ------>paper_name=Evaluation of biomechanical properties of expanded-polytetrafluoroethylenetm soft tissue patch after dorsal implantation in the rat to mimic tmj lateral reconstruction. ------>confirm_date=20060512 ------>tch_id=082002 ------>pmid=11394372 ------>page1=257 ------>fullAbstract=Clinically, Gore-Tex Expanded-Polytetrafluoroethylene (E-PTFE) has been used to reconstruct the lateral temporomandibular joint (TMJ) ligament. The purpose of this study was to assess changes in the biomechanical properties of implanted E-PTFE over time with respect to tissue infiltration. Ninety-six specimens of implants were divided into four groups. Group A was the experimental group. Thirty-six autoclave-sterilized specimens were subcutaneously implanted into the backs of 36 rats. The rats were randomly sacrificed at 2 (n = 12), 7 (n = 12) and 12 (n = 12) weeks. The implants were tested for mechanical properties including maximal stress, strain and Young~s modulus of elasticity (E) using the servo-hydraulic material testing system (MTS). Group B was the in vitro control group. Thirty-six specimens were placed in tissue culture media at 37 degrees C for a time period equivalent to the experimental group to simulate the effect of a moist, warm environment on biomechanical properties. Group C was the temperature and pressure control group. Twelve specimens were autoclave-sterilized to determine the changes of tensile strength under high temperature and pressure. Control group D (no treatment) was tested to determine the initial tensile strength. The results showed significantly larger maximal stress as well as an increase in E and smaller maximal strain in experimental group A than in control groups B, C and D. There was no significant difference among control groups B, C and D. Histological examination of implants at 12 weeks demonstrated that 0.2-0.3 mm of 1-mm thick implants were occupied by connective tissue from each side. It may be concluded that E-PTFE implants become stronger and less flexible after implantation in vivo. ------>tmu_sno=None ------>sno=296 ------>authors2=Stockstill JW ------>authors3=Burch JG ------>authors4= ------>authors5= ------>authors6= ------>authors6_c= ------>authors=Lai WFT ------>delete_flag=0 ------>SCI_JNo=None ------>authors2_c= ------>publish_area=0 ------>updateTitle=Evaluation of biomechanical properties of Expanded-Polytetrafluoroethylene Soft Tissue Patch after dorsal implantation in the rat to mimic TMJ lateral reconstruction. ------>language=2 ------>check_flag=0 ------>submit_date= ------>country=None ------>no=3 ------>patent_SDate=None ------>update_bywho= ------>publish_year=2001 ------>submit_flag= ------>publish_month=1 |