title: A modified technique for expanded polytetrafluoroethylene shaping in chin augmentation: parallel groove carving technique.
abstract: OBJECTIVE
  In the current study, we restricted our focus on a modified approach to address the poor curved attachment of expanded polytetrafluoroethylenein chin augmentation.
  
  
  METHODS
  The implant is shaped generally in accordance with the chin, followed by 5-to-8 longitudinally parallel "V"-grooves carved in the median of posterior site where the implant directly attaches to the mandible. Thus, it enhances bend ductility of the prosthesis and renders better attachment from the curved surface of prosthesis to the mandibular embedded region.
  
  
  RESULTS
  This procedure was performed in 15 patients. After follow-up for 2 to 6 months, there were no complications observed postoperatively including mobilization, dead space, subcutaneous dropsy, topical infection, or palpable edges in the subcutaneous area.
  
  
  CONCLUSIONS
  The introduction of longitudinally parallel V-groove technique provides an effective method for avoidance of increasing hardness, decreasing flexibility, and palpable edges after implantation.As a novel and effective technique, it is beneficial for better attachment and satisfactory outcome without causing extra expenses.
authors: From the Departments of *Plastic and Reconstructive Surgery and †Laboratory Medicine, HuaDong Hospital, Fudan University, Shanghai, P.R. China.
authors: Ping
authors: P
authors: Yang
authors: Qingjian
authors: Q
authors: Yang
authors: Tianyi
authors: T
authors: Liu
authors: Jiping
authors: J
authors: Zeng
authors: Bo
authors: B
authors: Bi
authors: Yiqun
authors: Y
authors: Zhou
authors: Yu
authors: Y
authors: Guo
authors: Liang
authors: L
authors: Chen
mesh_terms: D000293:Adolescent; D000328:Adult; D001672:Biocompatible Materials / Q000737:chemistry; D002680:Chin / Q000601:surgery; D005260:Female; D005500:Follow-Up Studies; D063172:Genioplasty / Q000379:methods*; D006801:Humans; D008297:Male; D008334:Mandible / Q000601:surgery; D011138:Polytetrafluoroethylene / Q000737:chemistry; D019736:Prostheses and Implants; D011474:Prosthesis Design; D019919:Prosthesis Implantation / Q000379:methods*; D013499:Surface Properties; D055815:Young Adult
chemical_list: D001672:Biocompatible Materials; D011138:Polytetrafluoroethylene