title: Mechanical properties of nasal fascia and periosteum.
abstract: OBJECTIVE
  To determine under which layer the silicone implants should be inserted into, the biomechanical properties of fascia and periosteum were investigated.
  
  
  METHODS
  Biomechanical testing of cadaveric tissues.
  
  
  BACKGROUND
  In silicone augmentation rhinoplasty, most complications are closely related to the depth of implant and the mechanical character of the tissue surrounding the implant.
  
  
  METHODS
  Biomechanical properties of human nasal periosteum and fascia were studied, including tensile strength, stress-strain relationship and stress relaxation under uniaxial elongation.Result. Although with less failure strain, the periosteum has more tensile strength than fascia. The slope of the linear part of stress-strain curve of the periosteum is bigger than that of fascia, which indicates the periosteum is stiffer than fascia. The stress-relaxation slope of periosteum is smaller than that of fascia.
  
  
  CONCLUSIONS
  In the view of biomechanics, the periosteum is thicker, stronger and stiffer than fascia. Under periosteum the silicone implants are easier to be fixed at desired position, thus periosteum is more suitable for covering silicone implants.
  
  
  CONCLUSIONS
  The periosteum is more suitable than fascia for covering silicone implants in augmentation rhinoplasty.
authors.affiliation: Medical School, Shantou University, Shantou, PR China. yjzeng@bjpu.edu.cn
authors.forename: Yan-Jun
authors.initials: YJ
authors.lastname: Zeng
authors.forename: Xiao-peng
authors.initials: XP
authors.lastname: Sun
authors.forename: Jian
authors.initials: J
authors.lastname: Yang
authors.forename: Wei-hua
authors.initials: WH
authors.lastname: Wu
authors.forename: Xiao-hu
authors.initials: XH
authors.lastname: Xu
authors.forename: Yi-ping
authors.initials: YP
authors.lastname: Yan
mesh_terms: D000293:Adolescent; D000328:Adult; D002102:Cadaver; D046508:Culture Techniques; D004548:Elasticity; D005205:Fascia / Q000502:physiology*; D005790:General Adaptation Syndrome; D006801:Humans; D008875:Middle Aged; D009038:Motion; D009666:Nose / Q000502:physiology* / Q000601:surgery; D010521:Periosteum / Q000502:physiology*; D019919:Prosthesis Implantation / Q000379:methods; D012225:Rhinoplasty / Q000379:methods; D013314:Stress, Mechanical; D013718:Tensile Strength; D014783:Viscosity