title: [A clinical study on reparation of orbital blowout fracture by bridge hydroxylapatite artificial bone].
abstract: OBJECTIVE
  To explore a minimally invasive technique with hydroxylapatite artificial bone to repair the orbital blowout fracture.
  
  
  METHODS
  Twenty-one cases of orbital blowout fracture from March 2008 to April 2010 were enrolled. And the fractures were repaired with a bridge of hydroxylapatite artificial bone under a nasal endoscope. During a regular 6-month follow-up, anatomic and functional recovery was evaluated.
  
  
  RESULTS
  There was neither postoperative visual loss nor infection in all cases. At 3 months post-operation, diplopia vanished completely (n = 17), remained in peripheral vision (n = 2), existed in primary ocular position (n = 2) and the deviation of eyeball (n = 1). At Month 3, diplopia in peripheral vision or in primary position and the deviation of eyeball showed no improvement. Compared with the uninjured side, enophthalmos: ≤ 2 mm (n = 18), > 2 mm (n = 2) and > 4 mm (n = 1). The passive traction test was positive in one case. On computed tomograph (CT) scanning, there was no bone dislocation or slippage in all cases.
  
  
  CONCLUSIONS
  The surgical efficacy is excellent. The technique of combining the advantages of endoscopic sinus approach and hydroxyapatite artificial bone is worth a wider popularization.
authors: Department of Ophthalmology, Third Affiliated Hospital, Hebei Medical University, Shijiazhuang 050000, China. hbeyedr@126.com
authors: Zhong-you
authors: ZY
authors: Zhou
authors: Xiao-rong
authors: XR
authors: Zhang
authors: Xin-li
authors: XL
authors: Jiang
authors: Xiu-jun
authors: XJ
authors: Song
authors: Hui-fang
authors: HF
authors: Wang