title: A new adjustable parallel drill guide for internal fixation of femoral neck fracture: a developmental and experimental study.
abstract: BACKGROUND
  Internal fixation is one treatment for femoral neck fracture. Some devices and techniques reported improved accuracy and decreased fluoroscopic time. However, these are not widely used nowadays due to the lack of available special instruments and techniques. To improve the surgical procedure, the authors designed a new adjustable drill guide and tested the efficacy of the device.
  
  
  METHODS
  The authors developed a new adjustable drill guide for cannulated screw guide wire insertion for multiple screw fixation. Eight orthopaedic surgeons performed the experimental study to evaluate the efficacy of this device. Each surgeon performed guide wire insertion for multiple screw fixation in six synthetic femurs: three times with the new device and three times with the conventional technique. The fluoroscopic time, operative time and surgeon satisfaction were evaluated.
  
  
  RESULTS
  In the operations with the new adjustable drill guide, the fluoroscopic and operative times were significantly lower than the operations with the conventional technique (p < 0.05). The mean score for the level of satisfaction of this device was also statistically significantly better (p = 0.02) than the conventional technique.
  
  
  CONCLUSIONS
  The fluoroscopic and operative times with the new adjustable drill guide were reduced for multiple screw fixation of femoral neck fracture and the satisfaction of the surgeons was good.
authors.affiliation: Department of Orthopaedic Surgery and Physical Medicine, Faculty of Medicine, Prince of Songkla University, Songkhla, 90110, Thailand. varahortho@gmail.com.
authors.forename: Varah
authors.initials: V
authors.lastname: Yuenyongviwat
authors.affiliation: Department of Orthopaedic Surgery and Physical Medicine, Faculty of Medicine, Prince of Songkla University, Songkhla, 90110, Thailand. suttop@hotmail.com.
authors.forename: Pakjai
authors.initials: P
authors.lastname: Tuntarattanapong
authors.affiliation: Department of Orthopaedic Surgery and Physical Medicine, Faculty of Medicine, Prince of Songkla University, Songkhla, 90110, Thailand. boonsin.b@psu.ac.th.
authors.forename: Boonsin
authors.initials: B
authors.lastname: Tangtrakulwanich
mesh_terms: D001863:Bone Screws / Q000639:trends*; D004867:Equipment Design / Q000295:instrumentation* / Q000639:trends*; D005265:Femoral Neck Fractures / Q000000981:diagnostic imaging / Q000601:surgery*; D005593:Fracture Fixation, Internal / Q000295:instrumentation* / Q000639:trends*; D006801:Humans; D011859:Radiography