title: Biodegradability of the Krupin-Denver valve.
mesh_terms: D001673:Biodegradation, Environmental; D004868:Equipment Failure; D005123:Eye / Q000098:blood supply; D005901:Glaucoma / Q000601:surgery; D006801:Humans; D008297:Male; D008855:Microscopy, Electron, Scanning; D008875:Middle Aged; D009389:Neovascularization, Pathologic / Q000601:surgery; D009885:Ophthalmology / Q000379:methods*; D019736:Prostheses and Implants / Q000009:adverse effects*