Otology sponges are sterile, compressed, fiber-free absorbable packing materials (PVA or gelatin-based) used in ear surgery to support grafts, control bleeding, and prevent external auditory canal stenosis post-tympanoplasty or mastoidectomy. They expand anatomically upon hydration to maintain medication contact, minimize tissue ingrowth, and protect the tympanic membrane while dissolving naturally. Available in 12-24 mm diameters, these latex-free sponges ensure clear visualization and infection control in otologic procedures.