Restoration of Lumbar Lordosis in Flat Back Deformity: Optimal Degree of Correction
Study DesignA retrospective comparative study.PurposeTo provide an ideal correction angle of lumbar lordosis (LL) in degenerative flat back deformity.Overview of LiteratureThe degree of correction in degenerative flat back in relation to pelvic incidence (PI) remains controversial.MethodsForty-nine...
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| Format: | Article |
| Language: | English |
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Korean Spine Society
2015-06-01
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| Series: | Asian Spine Journal |
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| Online Access: | http://www.asianspinejournal.org/upload/pdf/asj-9-352.pdf |
| _version_ | 1828443340552536064 |
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| author | Ki-Tack Kim Sang-Hun Lee Dae-Seok Huh Hyo-Jong Kim Jung-Youn Kim Jung-Hee Lee |
| author_facet | Ki-Tack Kim Sang-Hun Lee Dae-Seok Huh Hyo-Jong Kim Jung-Youn Kim Jung-Hee Lee |
| author_sort | Ki-Tack Kim |
| collection | DOAJ |
| description | Study DesignA retrospective comparative study.PurposeTo provide an ideal correction angle of lumbar lordosis (LL) in degenerative flat back deformity.Overview of LiteratureThe degree of correction in degenerative flat back in relation to pelvic incidence (PI) remains controversial.MethodsForty-nine patients with flat back deformity who underwent corrective surgery were enrolled. Posterior-anterior-posterior sequential operation was performed. Mean age and mean follow-up period was 65.6 years and 24.2 months, respectively. We divided the patients into two groups based on immediate postoperative radiographs-optimal correction (OC) group (PI-9°≤LL<PI+9°) and under-correction (UC) group (LL<PI-9°). We also classified the patients according to the PI of each patient-low PI group (PI<55°) and high PI group (PI≥55°). Radiological and clinical results were analyzed.ResultsPatients in OC group had significantly less correction loss and maintained normal sagittal alignment (sagittal vertical axis<5 cm), as compared to patients in UC group (p<0.05). LL of low PI group significantly maintained within 9° better than high PI group (p<0.05). Oswestry disability index (ODI) significantly decreased at last follow-up, as compared to preoperative state. However, there was no significant difference in last follow-up ODI between the groups.ConclusionsIn flat back deformity, correction of LL to within 9° of PI will result in better sagittal balance. Thus, we recommend sufficient LL to prevent correction loss, especially in patients with high PI. |
| first_indexed | 2024-12-10T21:27:54Z |
| format | Article |
| id | doaj.art-bc63265e8cee4865b0b25d61bcc44414 |
| institution | Directory Open Access Journal |
| issn | 1976-1902 1976-7846 |
| language | English |
| last_indexed | 2024-12-10T21:27:54Z |
| publishDate | 2015-06-01 |
| publisher | Korean Spine Society |
| record_format | Article |
| series | Asian Spine Journal |
| spelling | doaj.art-bc63265e8cee4865b0b25d61bcc444142022-12-22T01:32:56ZengKorean Spine SocietyAsian Spine Journal1976-19021976-78462015-06-019335236010.4184/asj.2015.9.3.352770Restoration of Lumbar Lordosis in Flat Back Deformity: Optimal Degree of CorrectionKi-Tack Kim0Sang-Hun Lee1Dae-Seok Huh2Hyo-Jong Kim3Jung-Youn Kim4Jung-Hee Lee5Department of Orthopaedic Surgery, Kyung Hee University College of Medicine, Seoul, Korea.Department of Orthopaedic Surgery, Kyung Hee University College of Medicine, Seoul, Korea.Department of Orthopaedic Surgery, CM Hospital, Seoul, Korea.Department of Orthopaedic Surgery, Shinsegye Hospital, Busan, Korea.Department of Orthopaedic Surgery, Kyung Hee University College of Medicine, Seoul, Korea.Department of Orthopaedic Surgery, Kyung Hee University College of Medicine, Seoul, Korea.Study DesignA retrospective comparative study.PurposeTo provide an ideal correction angle of lumbar lordosis (LL) in degenerative flat back deformity.Overview of LiteratureThe degree of correction in degenerative flat back in relation to pelvic incidence (PI) remains controversial.MethodsForty-nine patients with flat back deformity who underwent corrective surgery were enrolled. Posterior-anterior-posterior sequential operation was performed. Mean age and mean follow-up period was 65.6 years and 24.2 months, respectively. We divided the patients into two groups based on immediate postoperative radiographs-optimal correction (OC) group (PI-9°≤LL<PI+9°) and under-correction (UC) group (LL<PI-9°). We also classified the patients according to the PI of each patient-low PI group (PI<55°) and high PI group (PI≥55°). Radiological and clinical results were analyzed.ResultsPatients in OC group had significantly less correction loss and maintained normal sagittal alignment (sagittal vertical axis<5 cm), as compared to patients in UC group (p<0.05). LL of low PI group significantly maintained within 9° better than high PI group (p<0.05). Oswestry disability index (ODI) significantly decreased at last follow-up, as compared to preoperative state. However, there was no significant difference in last follow-up ODI between the groups.ConclusionsIn flat back deformity, correction of LL to within 9° of PI will result in better sagittal balance. Thus, we recommend sufficient LL to prevent correction loss, especially in patients with high PI.http://www.asianspinejournal.org/upload/pdf/asj-9-352.pdfFlat back deformityLumbar lordosisPelvic incidence |
| spellingShingle | Ki-Tack Kim Sang-Hun Lee Dae-Seok Huh Hyo-Jong Kim Jung-Youn Kim Jung-Hee Lee Restoration of Lumbar Lordosis in Flat Back Deformity: Optimal Degree of Correction Asian Spine Journal Flat back deformity Lumbar lordosis Pelvic incidence |
| title | Restoration of Lumbar Lordosis in Flat Back Deformity: Optimal Degree of Correction |
| title_full | Restoration of Lumbar Lordosis in Flat Back Deformity: Optimal Degree of Correction |
| title_fullStr | Restoration of Lumbar Lordosis in Flat Back Deformity: Optimal Degree of Correction |
| title_full_unstemmed | Restoration of Lumbar Lordosis in Flat Back Deformity: Optimal Degree of Correction |
| title_short | Restoration of Lumbar Lordosis in Flat Back Deformity: Optimal Degree of Correction |
| title_sort | restoration of lumbar lordosis in flat back deformity optimal degree of correction |
| topic | Flat back deformity Lumbar lordosis Pelvic incidence |
| url | http://www.asianspinejournal.org/upload/pdf/asj-9-352.pdf |
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