Korean J Spine.
2016 Sep;13(3):151-156. 10.14245/kjs.2016.13.3.151.
The Surgical Overcorrection of Lenke Type 1 Deformities with Selective Fusion Segments: What Happens to the Coronal Balance?
- Affiliations
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- 1Department of Orthopaedics and Traumatolgy, Carsamba State Hospital, Samsun, Turkey. yunatici@hotmail.com
- 2Department of Orthopaedics and Traumatolgy, LIV Hospital, Istanbul, Turkey.
- 3Department of Orthopaedics and Traumatology, Metin Sabanci Baltalimani Bone Diseases Training and Research Hospital, Istanbul, Turkey.
- 4Department of Orthopaedics and Traumatology, Gaziosmanpasa University, Istanbul, Turkey.
- 5Department of Orthopaedics and Traumatology, Medipol University, Istanbul, Turkey.
- 6Department of Orthopaedics and Traumatology, Istanbul Training and Research Hospital, Istanbul, Turkey.
- KMID: 2354715
- DOI: http://doi.org/10.14245/kjs.2016.13.3.151
Abstract
- PURPOSE
The aim of our study is to determine the alterations on coronal balance after overcorrection of Lenke type 1 curve, retrospectively.
METHODS
Datas of 34 patients (29 female, 5 male patients; mean age, 16.3±3.3 years; range, 13-24 years) surgically treated for scoliosis between 2004 and 2010 were reviewed, retrospectively. The adolescent idiopathic scoliosis patients with Lenke type 1 curve treated with only posterior pedicle screw and postoperative thoracic curves less than 10° by Cobb method on frontal plane were enrolled in this study. Mean follow-up period was 52.5±29.7 months.
RESULTS
The mean amount of the preoperative thoracic curves was measured as 41.2°±6.1° (range, 30°-56°). The mean amount of the early postoperative thoracic curves was measured as 6.5°±1.8° (range, 3°-9°). The mean amount of the thoracic curves was measured as 8.5°±4.6° (range, 3°-22°) during the last follow-up (p=0.01). The mean preoperative coronal balance was measured as 8.5mm(range, 1-30mm). The mean early postoperative coronal balance was measured as 3.5mm(range, 0-36 mm). The mean coronal balance was measured as 5.5mm(range, 0-38mm) during the last follow-up (p>0.05).
CONCLUSION
We suggest that Lenke type 1B and 1C should be carefully evaluated and the fusion levels should be accurately selected in order to maintain the correction of coronal balance. We suggest that selective fusion with overcorrection in Lenke type 1A are applied to curves that can be corrected lumbar curve at the preoperative bending radiograph and curves that not have coronal decompensation and >10° distal junctional kyphosis, preoperatively.
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