Observational Study to Evaluate the Influence of Undercast Material Types on Skin Microbiome

Inclusion Criteria: 1. Subject ≥ 18 years of age 2. Patient is physically and mentally able to participate in this study 3. Proper understanding of the Dutch language 4. Signed informed consent 5. Fractures to be treated with a short-arm cast without thumb inclusion for the period of 3 weeks (e.g. 2R3A1 = radial styloid avulsion, 2R3A2 = Simple radial fracture, 2U3A1 = Ulnar fracture of the base of the styloid process, 2U3A2= Simple distal ulna fracture, 2R3B1 = Intraarticular fracture of the styloid process of the radius (not displaced) or Triquetrum fracture (non AO classified)) Exclusion Criteria: 1. Subject \<18 years of age 2. Pregnancy, breast feeding 3. Participation in other clinical trials 4. Patient is neither physically nor mentally able to participate in this study 5. Non-intact skin in treatment area (including dermatological issues) 6. Patients with impaired (e.g. Cortisone skin, extremely dry skin, parchment skin) or damaged skin with either a surgical wound or a traumatic wound 7. Medical treatment prior casting which could influence the microbiome 8. Known Blood Circulatory Diseases 9. Known Lymphedema or any general disorder of the lymphatic system 10. Known Osteoporosis 11. Known Diabetes 12. Knowing of one of the following illnesses that might require regular systemic medication: cancer, rheumatic disease 13. Intolerability or documented allergies against cast materials 14. Subjects with not "normal" (unusual) hygienic behavior 15. Suspected drug addiction or alcohol abuse 16. Patients diagnosed HIV-positive or with infectious hepatitis based on self-declaration by subjects