Optimization of Skin Preparation to Reduce Cutibacterium Acnes Colonization in Superficial and Deep Samples During Prosthetic Shoulder Surgery in Male Patients

Inclusion Criteria:

• Male patients, Adult patients,

• Patient without a history of surgical intervention on the operated shoulder,

• Patient managed for glenohumeral, partial (cup or anatomical hemi- arthroplasty) ortotal (anatomical or inverted) glenohumeral arthroplasty placement for primaryosteoarthritis, or secondary to necrosis, massive rotator cuff tear or old fracture.

• Patients affiliated to a social security system

• Patients who have given their informed and written consent

Exclusion Criteria:

• Patient with arthroplasty for resumption of previous shoulder surgery or failure ofarthroplasty

• Patient with arthroplasty for acute trauma

• Patient on immunosuppressantsimmunosuppressive drugs

• Patient with inflammatory rheumatism

• Patient with progressive cancer pathology

• Allergies or intolerances concerning the modalities of selected skin preparations (Povidone Iodine, hypersensitivity to benzoyl peroxide)

• Dermatological pathologies in the area to be treated

• Acne treatment in the area to be treated within four weeks before inclusion

• Patient without possible help from a third party for the application of Cutacnyl® 5%in the intervention group if necessary

• Major under guardianship

• Patient under the protection of justice

• Patient not covered by social security