2.2 Secondary
- Analyze the average erosion time of the retaining ring, both by the
metallic and plastic prosthesis;
- Describe whether there was a resolution of food intolerance by the two
types of stents;
- Discriminate the resolution of the methods in relation to the
respective complications;
- Identify whether there was superior treatment for one of the two
stents in relation to the time and resolution of complications.