title: [Biomechanical research of different polypropylene meshes in breast ptosis correction].
abstract: OBJECTIVE
  To investigate the biomechanical properties of different polypropylene meshes, so as to select the proper mesh for breast ptosis correction as inner bra.
  
  
  METHODS
  Mini-pigs were used as animal model. Four different polypropylene meshes were implanted subcutaneously at abdomen. 90 d later, the specimens were taken out for biomechanical study.
  
  
  RESULTS
  The tensile strength, stress, relaxation and creep of the four meshes were different. The material and the knitting of the four meshes were different.
  
  
  CONCLUSIONS
  The biomechanical properties of relaxation and creep are important in maintaining the postoperative breast figure. Premilene Mesh LP is a new and light polypropylene mesh with mini-pores. Its biomechanical properties are superior to the others.
authors.affiliation: Plastic and Aesthetic Surgery Center, Beijing Union Hospital, Chinese Academy of Medical Sciences , Beijing 100032, China.
authors.forename: Zhi
authors.initials: Z
authors.lastname: Wang
authors.forename: Yan-jun
authors.initials: YJ
authors.lastname: Zeng
authors.forename: Hai-lin
authors.initials: HL
authors.lastname: Zhang
authors.forename: Bao-dong
authors.initials: BD
authors.lastname: Sun
authors.forename: Qun
authors.initials: Q
authors.lastname: Qiao
mesh_terms: D000818:Animals; D001672:Biocompatible Materials; D001696:Biomechanical Phenomena; D005260:Female; D016462:Mammaplasty; D008321:Mammary Glands, Animal / Q000601:surgery; D008422:Materials Testing; D011126:Polypropylenes; D013552:Swine; D013556:Swine, Miniature; D013718:Tensile Strength
chemical_list: D001672:Biocompatible Materials; D011126:Polypropylenes