title: An innovative broken pedicle screw retrieval instrument.
abstract: OBJECTIVE
  To introduce a new broken pedicle screw fragment retrieval instrument, and evaluate its clinical viability and effectiveness.
  
  
  METHODS
  Following basic retrieval contrivance of broken pedicle screws described in literature, a new retrieval instrument was designed and developed; introducing its mechanism, technical components, and use. This innovative apparatus proved successful not only in saw bone and cadaver trials but in 10 clinical cases as well.
  
  
  RESULTS
  This particular unique instrument successfully retrieves broken pedicle screw fragments through original passage backing out the screw with preservation of pedicle integrity while maintaining pedicle biomechanics. No complications were observed.
  
  
  CONCLUSIONS
  With solid scientific theoretical planning and experimentation, the new retrieval instrument design proved clinical practicality and efficacy.
authors.affiliation: Department of Orthopedics, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China 100730.
authors.forename: Xisheng
authors.initials: X
authors.lastname: Weng
authors.forename: Guixing
authors.initials: G
authors.lastname: Qiu
authors.forename: Junwei
authors.initials: J
authors.lastname: Li
authors.forename: Shugang
authors.initials: S
authors.lastname: Li
authors.forename: Chia-I
authors.initials: CI
authors.lastname: Lee
authors.forename: Bin
authors.initials: B
authors.lastname: Yu
authors.forename: Lianhua
authors.initials: L
authors.lastname: Li
mesh_terms: D020811:Biomedical Technology / Q000295:instrumentation / Q000592:standards; D001863:Bone Screws / Q000009:adverse effects / Q000592:standards*; D006801:Humans; D016268:Internal Fixators / Q000009:adverse effects / Q000592:standards*; D011183:Postoperative Complications / Q000209:etiology / Q000503:physiopathology / Q000601:surgery*; D013123:Spinal Fusion / Q000295:instrumentation* / Q000379:methods; D013131:Spine / Q000473:pathology / Q000601:surgery; D013525:Surgical Instruments / Q000592:standards* / Q000639:trends