title: Research on a novel rigid internal fixation system.
abstract: OBJECTIVE
  The purpose of the present study was to evaluate the efficiency of fixation with a novel (bulge core type system) rigid internal fixation system.
  
  
  METHODS
  Mandibular linear fractures were created artificially in dogs and fixed using a bulge core type system or a miniplate system in vitro. A 3-point load cell was used to contrast the fixation strength of the 2 systems in vitro. Histologic sections were used to analyze the healing of mandibular linear fractures and to contrast the efficiency of fixation of the 2 systems in vivo. Tetracycline-fluorescein staining technology was used to evaluate the bone healing speed in the mandibular fracture lines during bone healing.
  
  
  RESULTS
  In vitro, the 3-point load cell showed that the fixation strength of the bulge core type system was greater than that of the miniplate system (P < .05). In vivo, the histologic sections and tetracycline-fluorescein staining showed that greater and quicker bony healing occurred using the bulge core type system (P < .05) and that the efficiency of fixation of the 2 systems was similar.
  
  
  CONCLUSIONS
  Our results have shown that the bulge core type system can provide sufficient strength for mandibular linear fracture healing.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Fourth Military Medical University School of Stomatology, Xi'an, Shanxi Province, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Yang
authors.forename: Yan-Pu
authors.initials: YP
authors.lastname: Liu
authors.forename: Jin-Long
authors.initials: JL
authors.lastname: Zhao
authors.forename: Zhen-Qiang
authors.initials: ZQ
authors.lastname: Situ
mesh_terms: D000818:Animals; D001696:Biomechanical Phenomena; D001860:Bone Plates; D001861:Bone Regeneration; D001863:Bone Screws; D003799:Dental Stress Analysis; D004195:Disease Models, Animal; D004285:Dogs; D004867:Equipment Design; D005593:Fracture Fixation, Internal / Q000295:instrumentation* / Q000379:methods; D016268:Internal Fixators; D008337:Mandibular Fractures / Q000601:surgery*; D013314:Stress, Mechanical