Avaliação e caracterização de dispositivos intrauterinos utilizados comercialmente.

Abstract

The research aims to perform comparative analysis between contraceptives - IUD`s used commercially. Within this objective we sought: to propose a comparative basis between composition of TCu 380A IUD and Hormonal Endoception; determine the possible oxidation of copper IUDs; determining the type of polyethylene used in both IUD's. The research was conducted at the Laboratory of Biomaterials Evaluation and Development of the Northeast - CERTBIO, located in the Academic Unit of Materials Engineering, Federal University of Campina Grande / UFCG. TCu 380A and Sterile Endoception: two samples of intrauterine devices commonly used, as described below were used. Chemical compositions of IUDs and type of polyethylene were evaluated using the following techniques: Optical Microscopy (OM), Scanning Electron Microscopy (SEM / EDX) Spectroscopy in the Region with Infrared Fourier Transform Spectroscopy (FTIR), X-Ray Diffraction (XRD) and Differential Scanning Calorimetry (DSC). It can also prove from the EDS analysis the presence of barium sulphate in both IUD's, where it was used to make the IUD visible on x-rays proved the presence of silicium and oxygen in the stem of the IUD levonorgestrel indicating that it comprises a polydimethylsiloxane as reported by the manufacturer. Can be proved with FTIR analysis of the forming material of the principal of both bodies was polyethylene IUD‟s for examining the spectrogram. XRD analysis corroborated the results obtained with FTIR analysis of the material indicated that the devices it was polyethylene having a typical PE spectrogram. One can also show that the wire rings and the TCu 380 were composed of copper. The DSC analysis showed to be a constituent of both polyethylene IUDs Low Density Polyethylene (LDPE). Given the above it can be concluded that both IUDs have bodies formed of low density polyethylene, but have different processing, where the structure of the IUD levonorgestrel has finer surface finish compared to TCu 380 A.