The aiming device for cervical distractor pin insertion: a proof-of-concept, feasibility study
| Autor: | Nantawit Sugandhavesa, Raphi Raphitphan, Sittichai Luangkittikong, Wongthawat Liawrungrueang, K. Daniel Riew, Menghong Tosinthiti, Torphong Bunmaprasert, Supachoke Nivescharoenpisan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
medicine.medical_specialty
medicine.medical_treatment Diseases of the musculoskeletal system Bone Nails urologic and male genital diseases Anterior cervical surgery Anterior cervical discectomy 03 medical and health sciences 0302 clinical medicine Rheumatology Discectomy Cervical spine medicine Humans Orthopedics and Sports Medicine Orthodontics 030222 orthopedics business.industry Cervical lordosis Vertebral body Radiation exposure RC925-935 Orthopedic surgery Cervical Vertebrae Lordosis Feasibility Studies business Cadaveric spasm 030217 neurology & neurosurgery Diskectomy Research Article Caspar vertebral distraction pin insertion |
| Zdroj: | BMC Musculoskeletal Disorders, Vol 22, Iss 1, Pp 1-8 (2021) BMC Musculoskeletal Disorders |
| ISSN: | 1471-2474 |
| Popis: | Background Restoration of cervical lordosis after anterior discectomy and fusion is a desirable goal. Proper insertion of the vertebral distraction or Caspar pin can assist lordotic restoration by either putting the tips divergently or parallel to the index vertebral endplates. With inexperienced surgeons, the traditional free-hand technique for Caspar pin insertion may require multiple insertion attempts that may compromise the vertebral body and increase radiation exposure during pin localization. Our purpose is to perform a proof-of-concept, feasibility study to evaluate the effectiveness of a pin insertion aiming device for vertebral distraction pin insertion. Methods A Smith-Robinson approach and anterior cervical discectomy were performed from C3 to C7 in 10 human cadaveric specimens. Caspar pins were inserted using a novel pin insertion aiming device at C3-4, C4-5, C5-6, and C6-7. The angles between the cervical endplate slope and Caspar pin alignment were measured with lateral cervical imaging. Results The average Superior Endplate-to-Caspar Pin angle (SE-CP) and the average Inferior Endplate-to-Caspar Pin angle (IE-CP) were 6.2 ± 2.0° and 6.3 ± 2.2° respectively. For the proximal pins, the SE-CP and the IE-CP were 4.0 ± 1.1°and 5.2 ± 2.4° respectively. For the distal pins, the SE-CP and the IE-CP were 7.7 ± 1.4° and 6.2 ± 2.0° respectively. No cervical endplate violations occurred. Conclusion The novel Caspar pin insertion aiming device can control the pin entry points and pin direction with the average SE-CP and average IE-CP of 6.2 ± 2.0° and 6.3 ± 2.2°, respectively. The study shows that the average different angles between the Caspar pin and cervical endplate are less than 7°. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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