Adolescent idiopathic scoliosis: sagital plane and low
               density pedicle screws

Amaral, Rodrigo Augusto do; Meves, Robert; Caffaro, Maria Fernanda Silber; Umeta, Ricardo Shigueaki Galhego; Pelegrino, Luciano Antônio Nassar; Bergamaschi, João Paulo Machado; Avanzi, Osmar

doi:10.1590/S1808-18512014130100210

OBJECTIVE:

To examine the sagittal curves of patients treated with CD instrumentation using exclusively pedicle screws.

METHODS:

Image analysis of medical records of 27 patients (26 M and 1 F) with a minimum follow-up of 6 months, who underwent surgical treatment in our service between January 2005 and December 2010. The curves were evaluated on coronal and sagittal planes, taking into account the potential correction of the technique.

RESULTS:

In the coronal plan the following curves were evaluated: proximal thoracic (TPx), main thoracic (TPp), and thoracolumbar; lumbar (TL, L), and the average flexibility was 52%, 52%, and 92% and the capacity of correction was 51%, 72%, and 64%, respectively. In the sagittal plane there was a mean increase in thoracic kyphosis (CT) of 41% and an average reduction of lumbar lordosis (LL) of 17%. Correlation analysis between variables showed Pearson coefficient of correlation of 0.053 and analysis of dispersion of R² = <0.001.

CONCLUSION:

The method has shown satisfactory results with maintenance of kyphosis correction in patients with normal and hyper kyphotic deformities.

Scoliosis; Radiography; Spinal curvatures; Adolescent

[1] Correspondence: IPC - Instituto de Patologia da Coluna Rua Vergueiro, 1421, Cj 305, São Paulo, SP, Brasil. 04101-000. rodrigo@patologiadacoluna.com.br

n	Age	Sex	King	Lenke	Levels	Sagittal Pre(°)		Sagittal Post(°)
n	Age	Sex	King	Lenke	included	T5-T12	T12-S1	T5-T12	T12-S1
1	17	F	3	1A-	T4-T12	0	-46	8	-32
2	13	F	3	1AN	T4-L1	20	-60	23	-55
3	13	F	2	1BN	T4-T12	20	-54	25	-40
4	13	F	3	1AN	T4-L1	20	-45	36	-34
5	18	F	3	1AN	T3-L1	35	-62	29	-51
6	17	F	2	1CN	T4-L1	30	-49	27	-44
7	13	F	2	1CN	T4-L1	20	-50	28	-52
8	13	F	3	1BN	T4-L1	14	-50	30	-51
9	15	F	2	1BN	T5-L1	18	-45	35	-40
10	13	F	3	1A-	T4-L1	7	-42	20	-42
11	11	F	3	1AN	T4-L1	13	-32	23	-31
12	16	M	3	1A-	T4-L1	10	-30	14	-32
13	12	F	3	1AN	T4-T12	22	-38	22	-39
14	13	F	3	1AN	T4-L1	20	-50	24	0
15	15	F	3	1BN	T5-L3	40	-40	30	-30
16	16	F	2	1BN	T5-L4	24	-45	10	-48
17	15	F	2	1BN	T3-L3	40	-60	34	-38
18	15	F	3	1AN	T5-L2	24	-32	10	-42
19	15	F	3	1A-	T4-L3	6	-51	10	-30
20	17	F	3	1AN	T4L1	16	-65	24	0
21	12	F	3	1AN	T4-L1	18	-37	20	-40
22	11	F	3	1AN	T4-L1	38	-47	26	-34
23	16	F	3	1AN	T5-L1	15	-45	22	-40
24	14	F	3	1AN	T5-L1	14	-50	23	-47
25	13	F	3	1BN	T6-L1	12	-40	26	-49
26	16	F	2	1BN	T5-L1	20	-50	60	-43
27	13	F	3	1BN	T4-L1	21	-44	19	-22
	14.3					20.4	-46.63	24.4	-37.3

	TPx	TPp	TL/L
Pre (°)	26.2 ± 7.1	56.2 ± 7.5	31.8 ± 11.4
Flexibility	52%	52%	92%
Post (°)	12.9 ± 6.8	15.9 ± 9.0	11.5 ± 8.2
Correction (%)	51%	72%	64%

Brasil

Brasil

Adolescent idiopathic scoliosis: sagital plane and low density pedicle screws

Escoliose idiopática do adolescente: plano sagital e baixa densidade metálica de parafusos pediculares

Escoliosis idiopática del adolescente: el plano sagital y tornillos pediculares metálico de baja densidad

OBJECTIVE:

METHODS:

RESULTS:

CONCLUSION: