{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,22]],"date-time":"2026-10-22T15:27:39Z","timestamp":1792682859548,"version":"4.5.0"},"reference-count":34,"publisher":"SAGE Publications","issue":"7","license":[{"start":{"date-parts":[[2021,2,15]],"date-time":"2021-02-15T00:00:00Z","timestamp":1613347200000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Global Spine Journal"],"published-print":{"date-parts":[[2022,9]]},"abstract":"<jats:sec>\n                    <jats:title>Study Design:<\/jats:title>\n                    <jats:p>Retrospective evaluation of prospectively collected data.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Objective:<\/jats:title>\n                    <jats:p>Analyzing time course and stages of interbody fusion of a uniformly operated cohort, defining a grading system and establishing diagnosis-dependent periods of bone healing.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>Sequential lateral radiographs of 238 patients (313 levels) with interbody fusion operated thoracoscopically were analyzed.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>Evaluation of 1696 radiographs with a mean follow-up of 65.19 months and average numbers of 5.42 (2-18) images per level was performed. Diagnoses were Pyogenic Spondylitis (74), Fracture (96), Ankylosing Spondylitis (38) and Degenerative Disease (105). No case with Grade 2 deteriorated to Grade 5. On average, Grade 4 persisted for 113 days, Grade 3 for 197 days, Grade 2 for 286 days and Grade 1 for 316 days. The first 95% of levels (\u201cGreen Zone\u201d, \u2264 Grade 2) fused at 1 year, the remaining 4% levels fused between 12 and 17 months (\u201cYellow Zone\u201d) and the last 1% (\u201cRed Zone\u201d) fused after 510 days.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>Sequential lateral radiographs permit evaluation of interbody fusion. Grade 2 is the threshold point for fusion; once accomplished, failure is unlikely. If fusion (Grade 2,1 or 0) is not reached within 510 days, it should be regarded as failed. The 510-day-threshold could reduce the necessity of CT scanning for assessing fusion.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/2192568220983796","type":"journal-article","created":{"date-parts":[[2021,2,15]],"date-time":"2021-02-15T04:25:22Z","timestamp":1613363122000},"page":"1481-1494","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":11,"title":["Evaluation of Spinal Fusion in Thoracic and Thoracolumbar Spine on Standard X-Rays: A New Grading System for Spinal Interbody Fusion"],"prefix":"10.1177","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7552-9588","authenticated-orcid":false,"given":"Nirmal D.","family":"Patil","sequence":"first","affiliation":[{"name":"Department of Spine Surgery, Zentralklinik Bad Berka, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hussein Abou","family":"El Ghait","sequence":"additional","affiliation":[{"name":"Department of Spine Surgery, Al-Azhar Hospital, Al-Azhar University, Cairo, Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christian","family":"Boehm","sequence":"additional","affiliation":[{"name":"Department of Earth Sciences, ETH Zurich, Zurich, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Heinrich","family":"Boehm","sequence":"additional","affiliation":[{"name":"Department of Spine Surgery, Zentralklinik Bad Berka, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2021,2,15]]},"reference":[{"key":"bibr1-2192568220983796","doi-asserted-by":"publisher","DOI":"10.1097\/00007632-199106001-00017"},{"key":"bibr2-2192568220983796","doi-asserted-by":"publisher","DOI":"10.1097\/00007632-199511000-00009"},{"key":"bibr3-2192568220983796","doi-asserted-by":"publisher","DOI":"10.1097\/00007632-199307000-00010"},{"key":"bibr4-2192568220983796","doi-asserted-by":"publisher","DOI":"10.1097\/00007632-200405150-00013"},{"key":"bibr5-2192568220983796","doi-asserted-by":"publisher","DOI":"10.3171\/2014.4.SPINE14267"},{"key":"bibr6-2192568220983796","doi-asserted-by":"publisher","DOI":"10.3171\/spi.2005.2.6.0653"},{"key":"bibr7-2192568220983796","doi-asserted-by":"publisher","DOI":"10.1016\/j.spinee.2007.03.013"},{"key":"bibr8-2192568220983796","doi-asserted-by":"publisher","DOI":"10.1016\/j.spinee.2007.12.004"},{"issue":"8","key":"bibr9-2192568220983796","first-page":"1885","volume":"26","author":"Lebwohl NH","year":"2005","journal-title":"AJNR"},{"key":"bibr10-2192568220983796","doi-asserted-by":"publisher","DOI":"10.1097\/BSD.0b013e31829a37ac"},{"key":"bibr11-2192568220983796","doi-asserted-by":"publisher","DOI":"10.1007\/s00586-013-2835-0"},{"key":"bibr12-2192568220983796","doi-asserted-by":"publisher","DOI":"10.3171\/2014.4.SPINE14267"},{"key":"bibr13-2192568220983796","doi-asserted-by":"publisher","DOI":"10.1097\/01.brs.0000259808.47104.dd"},{"key":"bibr14-2192568220983796","doi-asserted-by":"publisher","DOI":"10.1016\/j.spinee.2006.04.005"},{"key":"bibr15-2192568220983796","doi-asserted-by":"publisher","DOI":"10.1097\/BRS.0b013e31822ffa05"},{"key":"bibr16-2192568220983796","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.64B2.7040410"},{"key":"bibr17-2192568220983796","doi-asserted-by":"publisher","DOI":"10.3171\/foc.2001.10.4.12"},{"key":"bibr18-2192568220983796","doi-asserted-by":"publisher","DOI":"10.1097\/01.BRS.0000048469.45035.B9"},{"key":"bibr19-2192568220983796","doi-asserted-by":"publisher","DOI":"10.1097\/00007632-200102010-00020"},{"key":"bibr20-2192568220983796","doi-asserted-by":"publisher","DOI":"10.1016\/j.spinee.2013.07.459"},{"key":"bibr21-2192568220983796","doi-asserted-by":"publisher","DOI":"10.1097\/00007632-199703150-00021"},{"key":"bibr22-2192568220983796","doi-asserted-by":"publisher","DOI":"10.1097\/00007632-200212010-00010"},{"key":"bibr23-2192568220983796","doi-asserted-by":"publisher","DOI":"10.1097\/00007632-199506020-00014"},{"key":"bibr24-2192568220983796","doi-asserted-by":"publisher","DOI":"10.1097\/00007632-199310001-00030"},{"key":"bibr25-2192568220983796","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.89B5.19039"},{"key":"bibr26-2192568220983796","doi-asserted-by":"publisher","DOI":"10.1016\/j.joca.2007.10.001"},{"key":"bibr27-2192568220983796","unstructured":"Post-hoc Power Calculator: Evaluate statistical power of an existing study. 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