Structural and thermal properties of polypropylene mesh used in treatment of stress urinary incontinence.

Besides material biocompatibility, it is possible to infer that both vaginal and urethral erosion rates associated with sub-urethral synthetic slings may be related to the mechanical properties of the meshes and also to their other properties. With the aim of understanding what distinguishes the different polypropylene meshes, used for the treatment of the stress urinary incontinence (SUI), their structural and thermal properties were investigated. Five different mesh types were tested (Aris, Auto Suture, Avaulta, TVTO and Uretex).

Tensile strength study of the abdominal wall following laparotomy synthesis using three types of surgical wires in Wistar rats.

Purpose: To study the tensile strength of the abdominal wall following laparotomy synthesis utilizing three types of surgical wires.

Methods: Thirty Wistar rats were randomized into three groups of ten rats each. Each group underwent a 3cm-laparotomy which was closed with 3-0 polyglactin 910, polyglecrapone and catgut wires.

Considerations that may influence the result of trials assessing tensile strength in experimental surgery.

Purpose: To provide information gathered upon the execution of trials assessing tensile strength in experimental surgeries.

Methods: Descriptive study considering details on the execution of trials assessing tensile strength in experimental surgery.

Results: The analysis of the rupture force in a mechanical test machine is an adequate technique since it provides precise and quick results.

Experimental study comparing the tensile strength of different surgical meshes following aponeurotic-muscle deformity synthesis on Wistar rats.

Purpose: To assess the tensile strength of polypropylene and polypropylene associated with polyglactin meshes (Vypro II--Ethicon, Somerville, NJ, USA) in a situation of partial separation of abdominal muscle aponeurosis on rats.

Methods: Thirty rats were used of the Wistar strain, which were randomized into two groups of 15 specimens each. In both groups an aponeurotic-muscle deformity was created on the abdominal wall measuring 3.