{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,16]],"date-time":"2026-10-16T19:33:40Z","timestamp":1792179220281,"version":"4.4.0"},"reference-count":34,"publisher":"SAGE Publications","issue":"3","license":[{"start":{"date-parts":[[2025,9,1]],"date-time":"2025-09-01T00:00:00Z","timestamp":1756684800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"},{"start":{"date-parts":[[2025,9,1]],"date-time":"2025-09-01T00:00:00Z","timestamp":1756684800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["J Orthop Surg (Hong Kong)"],"published-print":{"date-parts":[[2025,9]]},"abstract":"<jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>This study aimed to compare the radiological and clinical outcomes of unilateral biportal endoscopic lumbar decompression (UBELD) performed with 0-degree and 30-degree endoscopes.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Patients with single-level lumbar spinal stenosis without instability were included in this single-center retrospective study. The patients were categorized into two groups on the basis of the angle of the endoscope used by the surgeon. Clinical outcome measures included JOA scores, Oswestry Disability Index (ODI), and VAS scores for low back and leg pain, assessed preoperatively and at 12\u00a0months postoperatively. Ipsilateral and contralateral osteotomy angles, overhang distance, and ipsilateral inferior articular process (IAP) area were measured.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Among the 81 patients who met the inclusion criteria, a 30-degree endoscope was used in 51 patients, while a 0-degree endoscope was used in 30 patients. The JOA score, VAS-leg score, VAS-low back pain score, and ODI significantly improved in both groups at the final follow-up period (\n                      <jats:italic>p<\/jats:italic>\n                      &lt; 0.001). Postoperative VAS-low back pain score in the 30-degree endoscope group was significantly lower than that in the 0-degree endoscope group (1.4 vs 2.9,\n                      <jats:italic>p<\/jats:italic>\n                      &lt; 0.001). Significant differences were also observed in the ipsilateral osteotomy angle (77.8\u00b0 vs 87.8\u00b0,\n                      <jats:italic>p<\/jats:italic>\n                      &lt; 0.001), overhang distance (\u22121.16\u00a0mm vs \u22124.39\u00a0mm,\n                      <jats:italic>p<\/jats:italic>\n                      &lt; 0.001), and the postop\/preop ratio of ipsilateral IAP area (0.74 vs 0.69,\n                      <jats:italic>p<\/jats:italic>\n                      = 0.006). Radiological parameters for facet preservation were better in the 30-degree endoscope group.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Successful clinical improvements were achieved with both endoscope angles. However, facet preservation parameters were more favorable in the 30-degree endoscope group compared to the 0-degree endoscope group.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/10225536251386150","type":"journal-article","created":{"date-parts":[[2025,10,1]],"date-time":"2025-10-01T15:22:02Z","timestamp":1759332122000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":6,"title":["Comparison of 0-degree and 30-degree endoscopes in unilateral biportal endoscopic decompression for lumbar spinal stenosis: Which preserves the facet joint better?"],"prefix":"10.1177","volume":"33","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6796-3176","authenticated-orcid":false,"given":"Abdullah","family":"Merter","sequence":"first","affiliation":[{"name":"Department of Orthopedics and Traumatology, Ankara University, Ankara, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2187-9267","authenticated-orcid":false,"given":"Mustafa","family":"\u00d6zy\u0131ld\u0131ran","sequence":"additional","affiliation":[{"name":"Department of Orthopedics and Traumatology, Sand\u0131kl\u0131 State Hospital, Sand\u0131kl\u0131, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2025,10]]},"reference":[{"key":"e_1_3_6_2_2","doi-asserted-by":"publisher","DOI":"10.1056\/NEJMoa070302"},{"key":"e_1_3_6_3_2","doi-asserted-by":"publisher","DOI":"10.1097\/BSD.0000000000000876"},{"key":"e_1_3_6_4_2","doi-asserted-by":"publisher","DOI":"10.1097\/BRS.0000000000001161"},{"key":"e_1_3_6_5_2","doi-asserted-by":"publisher","DOI":"10.1186\/s12891-024-07825-z"},{"key":"e_1_3_6_6_2","doi-asserted-by":"publisher","DOI":"10.3171\/2015.7.SPINE15304"},{"key":"e_1_3_6_7_2","doi-asserted-by":"publisher","DOI":"10.1097\/01.brs.0000182315.88558.9c"},{"key":"e_1_3_6_8_2","doi-asserted-by":"publisher","DOI":"10.1136\/bmj.h6234"},{"key":"e_1_3_6_9_2","doi-asserted-by":"publisher","DOI":"10.1227\/00006123-199508000-00025"},{"key":"e_1_3_6_10_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.clineuro.2015.01.014"},{"issue":"1","key":"e_1_3_6_11_2","first-page":"396","article-title":"Clinical outcomes after microendoscopic laminotomy for lumbar spinal stenosis: a 5-year follow-up study","volume":"24","author":"Minamide A","year":"2014","unstructured":"Minamide A, Yoshida M, Yamada H, et al. Clinical outcomes after microendoscopic laminotomy for lumbar spinal stenosis: a 5-year follow-up study. Eur Spine J 2014; 24(1): 396\u2013403.","journal-title":"Eur Spine J"},{"key":"e_1_3_6_12_2","doi-asserted-by":"publisher","DOI":"10.14245\/ns.2448864.432"},{"key":"e_1_3_6_13_2","doi-asserted-by":"publisher","DOI":"10.1186\/s13018-018-0725-1"},{"key":"e_1_3_6_14_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jos.2019.05.022"},{"key":"e_1_3_6_15_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.wneu.2021.01.031"},{"key":"e_1_3_6_16_2","doi-asserted-by":"publisher","DOI":"10.31616\/asj.2020.0656"},{"key":"e_1_3_6_17_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.wneu.2025.124230"},{"key":"e_1_3_6_18_2","doi-asserted-by":"publisher","DOI":"10.3171\/2019.2.FOCUS197"},{"key":"e_1_3_6_19_2","doi-asserted-by":"publisher","DOI":"10.1097\/BSD.0000000000000026"},{"key":"e_1_3_6_20_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcm.2016.02.012"},{"key":"e_1_3_6_21_2","first-page":"283","volume-title":"Statistical principles in experimental design","author":"Winer BJ","year":"1971","unstructured":"Winer BJ. Statistical principles in experimental design. 2nd ed. McGraw-Hill, 1971, pp. 283\u2013293.","edition":"2"},{"key":"e_1_3_6_22_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.wneu.2011.10.051"},{"key":"e_1_3_6_23_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00381-004-0930-6"},{"key":"e_1_3_6_24_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.wneu.2012.02.032"},{"key":"e_1_3_6_25_2","doi-asserted-by":"publisher","DOI":"10.1016\/S1042-3680(03)00065-2"},{"key":"e_1_3_6_26_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00464-004-8282-6"},{"key":"e_1_3_6_27_2","doi-asserted-by":"publisher","DOI":"10.1080\/01443615.2022.2036957"},{"key":"e_1_3_6_28_2","first-page":"2540","volume-title":"General principles of arthroscopy","author":"Phillips BB","year":"2021","unstructured":"Phillips BB, Azar FM, James HB, et al. General principles of arthroscopy. 14th ed. Elsevier, 2021, pp. 2540\u20132551.e2. Chapter 49.","edition":"14"},{"key":"e_1_3_6_29_2","doi-asserted-by":"publisher","DOI":"10.3390\/jcm12031033"},{"key":"e_1_3_6_30_2","doi-asserted-by":"publisher","DOI":"10.3390\/jcm14082725"},{"key":"e_1_3_6_31_2","doi-asserted-by":"publisher","DOI":"10.1097\/BRS.0b013e31815e3a10"},{"key":"e_1_3_6_32_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.arthro.2010.04.070"},{"key":"e_1_3_6_33_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-014-3336-3"},{"key":"e_1_3_6_34_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.otsr.2019.02.003"},{"key":"e_1_3_6_35_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-014-3452-0"}],"container-title":["Journal of Orthopaedic Surgery"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/10225536251386150","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/full-xml\/10.1177\/10225536251386150","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/10225536251386150","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T23:32:27Z","timestamp":1777678347000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.sagepub.com\/doi\/10.1177\/10225536251386150"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,9]]},"references-count":34,"journal-issue":{"issue":"3","published-print":{"date-parts":[[2025,9]]}},"alternative-id":["10.1177\/10225536251386150"],"URL":"https:\/\/doi.org\/10.1177\/10225536251386150","relation":{},"ISSN":["1022-5536","2309-4990"],"issn-type":[{"value":"1022-5536","type":"print"},{"value":"2309-4990","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,9]]},"article-number":"10225536251386150"}}