Knotted or knotless double-row rotator cuff repair retear rates: a systematic review and meta-analysis.

Background: Arthroscopic rotator cuff tear repair techniques used to rely on knot-tying double row techniques, but the advent of knotless transosseous equivalent procedures introduced a new variable to the debate. The purpose of this study is to determine which technique is associated with lower retear rates. For its' biomechanical advantages, the authors' hypothesis is that knotless techniques would have lower retear rates.

The environmental risk as a culture in the Sinos Valley, Brazil.

The proposal of analysis of the social-environmental perception will be developed from the discourse as a constitutive element of reality. The discourse practices and their concretion will be the source of meaning and social-cultural value. Thus, the chosen research method was the qualitative and quantitative case study.