Abstract: A dental floss 2 containing a multifilament is a flat braided cord. The number of threads constituting the flat braided cord is preferably 6 to 33, and the dental floss preferably has a width of 0.5 to 4.0 mm, and a passage gap of 0.01 to 0.1 mm. The flat cord may contain a monofilament or a multifilament-connected thread together with the multifilament. Constituent threads of the braided cord are obliquely arranged and fixed, and, when the cord is moved in a length direction, the obliquely fixed constituent threads efficiently remove food residue, dental plaque, and the like between teeth. Furthermore, the flat braided cord is flat and thin, and easy to insert between teeth. Accordingly, a dental floss that can efficiently remove food residue, dental plaque, and the like between teeth is provided.

Abstract: The present invention provides a biocompatible membrane which has a configuration that conforms well to an affected part and can be used in fields such as dentistry, oral surgery, orthopedics, etc., by a compatible membrane production process in which a biocompatible material is subjected to a lamination forming process or a powder electrostatic coating process. Examples of lamination forming processes include (a) selective laser sintering, (b) powder adherence, (c) fused deposition molding, (d) laminated object manufacturing, and (e) optical molding. The biocompatible membrane is useful as, for example, a tissue regeneration membrane or a bone regeneration membrane for periodontal tissue, bone tissue, and like tissue regeneration treatment.