Postoperative Increase in Occiput–C2 Angle Negatively Impacts Subaxial Lordosis after Occipito–Upper Cervical Posterior Fusion Surgery
| Autor: | Mitsutoshi Ota, Masaaki Aramomi, Satoshi Maki, Takane Suzuki, Masao Koda, Koshiro Kamiya, Takeo Furuya, Masashi Yamazaki, Chikato Mannoji, Taigo Inada, Kazuhisa Takahashi |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Spinal curvatures
medicine.medical_specialty Lordosis medicine.medical_treatment Radiography lcsh:Medicine 03 medical and health sciences 0302 clinical medicine Cervical spine medicine Orthopedics and Sports Medicine 030222 orthopedics Occipital bone business.industry lcsh:R Occiput medicine.disease Surgery Vertebra medicine.anatomical_structure Spinal Curvatures Spinal fusion Clinical Study business 030217 neurology & neurosurgery |
| Zdroj: | Asian Spine Journal Asian Spine Journal, Vol 10, Iss 4, Pp 744-747 (2016) |
| ISSN: | 1976-7846 1976-1902 |
| Popis: | Study design Retrospective case series. Purpose To elucidate the impact of postoperative occiput-C2 (O-C2) angle change on subaxial cervical alignment. Overview of literature In the case of occipito-upper cervical fixation surgery, it is recommended that the O-C2 angle should be set larger than the preoperative value postoperatively. Methods The present study included 17 patients who underwent occipito-upper cervical spine (above C4) posterior fixation surgery for atlantoaxial subluxation of various etiologies. Plain lateral cervical radiographs in a neutral position at standing were obtained and the O-C2 angle and subaxial lordosis angle (the angle between the endplates of the lowest instrumented vertebra (LIV) and C7 vertebrae) were measured preoperatively and postoperatively soon after surgery and ambulation and at the final follow-up visit. Results There was a significant negative correlation between the average postoperative alteration of O-C2 angle (DO-C2) and the average postoperative alteration of subaxial lordosis angle (Dsubaxial lordosis angle) (r=-0.47, p=0.03). Conclusions There was a negative correlation between DO-C2 and Dsubaxial lordosis angles. This suggests that decrease of mid-to lower-cervical lordosis acts as a compensatory mechanism for lordotic correction between the occiput and C2. In occipito-cervical fusion surgery, care must be taken to avoid excessive O-C2 angle correction because it might induce mid-to-lower cervical compensatory decrease of lordosis. |
| Databáze: | OpenAIRE |
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