Journal List > J Korean Soc Spine Surg > v.22(3) > 1076083

Seo, Lee, and Kim: The Effect of Teriparatide in Women with Osteoporosis after Lumbar Posterolateral Fusion or Posterior Lumbar Interbody Fusion

Abstract

Study Design

Retrospective study.

Objectives

To investiggaate radiologic aannd clinicaall outcomes of teripa.ratide in women with osteoporosis afafer instrume.nted lu.mbambar posterolateral fusion (PLF) or posterior lumbar interbody fusion (PLIF).

Summary of Literature Review

Summary of Literature Review: Teriparatide accelerated lumbar posterolateral fusion in women with postmenopausal osteoporosis. Materials and Methods: Eigh ty-six women older than 65 years old with osteoporosis underwent PLF or PLIF with bone graf t between Februar, 2011 ato May, 2012 pPatients were divided into four group: teriparatide group with local bone (A-1: 13 patients;, teriparatide group with composite bone (A-2: 27 patients; non-teriparatide group with local bone (B-1: 14 patients; and non-teriparatide group with composite bone (B-2: 32 patients). At 3, 6, and 12 months postoperatively, the Oswestry Disability Index (ODI), visual analog scale (VAS), fusion rate, and period of bone union were evaluated.

Results

VAS and ODI improved after surgery in all groups, but no significant differences were notell among the groupses Further, there was no sign ifican t diff erence am ong the groups for age fusion level, and fusiops(p>0.05). Fusion rate was 94.44% in the A-1 group, 92.59% in the A-2 group, 79.17% in the B-1 group, and 76.92% in the B-2 group. Average period of bone union was 3.25 months, 3.65 months, 5.67 months, and 5.65 months respectively. Fusion rate and averag e bone union time ma de no sign ifican t diff ereneen am ong the groups divided by graft materials (p>0.05). However, those in the teriparatide group were significantly superior to those in the nonteriparatide group (p<0.05).

Conclusions

In women with osteoporosis after PLF or PLIF with bonegraft, teriparatide showed superiority in the rate of fusion and the period of bone union.

REFERENCES

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Figures and Tables%

Fig. 1.
At the six month foll ow- up of the 73-year-old woman with posterior lumba r fusion for spinal stenosis L4-L5, L5-S1, dynamic flexion (A) and extension (B) radiographs show less than 2˚ angular motion on L4-L5 after instrumentation withoutscrew loosening.
jkss-22-82f1.tif
Fig. 2.
CT scans 6 months after surgery from a 74-year-old woman who underwent posterolateral lumbar fusion of L3-L4, L4-L5with composite bone graft of local bone and allograft. (A) An axial CT image shows big solid trabeculated bilateral fusion massformation bilaterally on L4-L5. (B) A sagittal CT image of the same patient shows continuously sufficient trabecular bone formationin the right transverse processes of L3 to L5.
jkss-22-82f2.tif
Table 1.
Demographic Characteristics of the Patients
Group A (teriparatide) Group B (non-teriparatide) Total p-value
A-1 A-2 P-value B-1 B-2 p-value
Number of patients 13 27 - 14 32 - 86 -
Mean age (year) 73.7±6.6 73.0±6.6 0.757 72.6±4.5 74.5±6.0 0.286 0.599
NSAIDs before surgery 10 23 0.519 11 29 0.264 0.565
Smoker 0 0 - 0 1 - -
Mean BMD (T-score) -3.1±0.8 -3.0±0.7 0.680 -2.9±0.7 -3.1±0.6 0.321 0.963
Preoperative diagnosis 0.941 0.335 0.595
 Spinal stenosis 6 13 7 14 40
 Spondylo -listhesis 2 5 5 7 19
 Mixed 5 9 2 11 27
Pain score before surgery
 *VAS 6.85±0.99 6.52±0.89 0.300 6.57±0.76 7.00±1.02 0.165 0.233
 ODI 29.30±4.03 28.50±4.26 0.580 28.80±3.31 29.90±4.01 0.365 0.360
Operation
PLF 8 5 0.007 6 6 0.011 25 0.830
§PLIF + PLF 5 22 8 26 61

*VAS: Visual Analogue Scale, ODI: Oswestry Disability Index, PLF: posterolateral fusion,

§PLIF: posterior lumbar interbody fusion, - : not applicable.

Table 2.
Clinical Pain Scores of Patients
Group A (teriparatide) Group B (non-teriparatide)
A-1 A-2 B-1 B-2
Visual Analogue Scale
 3 months after surgery 4.62±0.961 4.29±0.869 4.71±1.069 4.50±1.295
 6 months after surgery 2.46±0.660 2.81±0.921 2.46±0.967 2.90±1.088
 12 months after surgery 1.69±0.630 1.59±0.797 1.93±0.829 2.00±1.164
Oswestry Disability Index
 3 months after surgery 15.85±2.410 15.30±2.462 16.00±1.617 15.59±1.915
 6 months after surgery 13.07±2.139 13.52±2.408 13.29±1.978 13.72±2.317
 12 months after surgery 12.31±2.175 12.19±2.573 12.50±2.442 12.69±2.533
Table 3.
Multivariate Analysis
variables Wilks’ Lambda F-value df p-value
*VAS Age 0.958 0.757 3.000 0.523
Numbers of fusion level 0.966 0.612 3.000 0.610
Fusion 0.972 0.502 3.000 0.682
Teriparatide 0.928 1.016 3.000 0.390
Bonegraft 0.907 1.771 3.000 0.164
Teriparatide * bone graft 0.997 0.059 3.000 0.981
ODI Age 0.973 0.476 3.000 0.700
Numbers of fusion level 0.994 0.110 3.000 0.954
Fusion 0.933 1.242 3.000 0.304
Teriparatide 0.945 0.961 3.000 0.415
Bonegraft 0.901 1.908 3.000 0.140
Teriparatide * bonegraft 0.990 0.169 3.000 0.917

VAS: Visual Analogue Scale, ODI: Oswestry Disability Index.

Table 4.
Tests of Between-Subjects Effect
variables months *VAS ODI
Mean square F p-value Mean square F p-value months
Age 3 months 1.249 1.329 0.254 0.127 0.035 0.853
6 months 0.045 0.068 0.796 1.361 0.379 0.541
12 months 0.452 1.111 0.296 0.532 0.136 0.714
Numbers of fusion level 3 months 0.985 1.048 0.311 0.798 0.216 0.644
6 months 0.117 0.178 0.675 0.365 0.102 0.751
12 months 0.517 1.271 0.265 0.088 0.023 0.881
Fusion 3 months 0.154 0.163 0.688 6.530 1.771 0.189
6 months 0.811 1.233 0.272 9.664 2.695 0.107
12 months 0.318 0.782 0.381 8.699 2.221 0.142
Teriparatide 3 months 1.851 1.968 0.166 6.126 1.661 0.203
6 months 1.044 1.587 0.213 0.495 0.138 0.712
12 months 0.286 0.702 0.406 0.642 0.164 0.687
Bonegraft 3 months 0.733 0.780 0.381 5.231 1.419 0.239
6 months 1.223 1.860 0.178 6.352 1.771 0.189
12 months 0.669 1.644 0.205 7.001 1.787 0.187
Teriparatide * bonegraft 3 months 0.147 0.156 0.694 0.007 0.002 0.965
6 months 0.011 0.017 0.896 0.022 0.006 0.938
12 months 0.017 0.041 0.840 0.492 0.126 0.725

*VAS: Visual Analogue Scale, ODI: Oswestry Disability Index.

Table 5.
Evaluation of Bone Union
Group A (teriparatide) Group B (non-teriparatide) Total p-value
A-1 A-2 p-value B-1 B-2 p-value
Numbers of fusion level 0.015 0.229 0.619
 1 level 8 5 6 6 25
 2 level 5 17 6 19 47
 3 level 0 5 2 7 14
 Total 13 27 14 32 86
Bone union on *CT, numb ers of segm ents (%) 0.976 0.987 0.009
 Bilateral fusion Mass 11 (61.1) 36 (66.7) 10 (41.7) 27 (41.5) 84
 Unilateral fusion Mass 6 (33.3) 14 (25.9) 9 (37.5) 23 (35.4) 52
 Insufficient fusion mass 1 (5.6) 3 (5.5) 3 (12.5) 10 (15.4) 17
 No fusion mass 0(0) 1 (1.9) 2 (8.3) 5 (7.7) 8
 Total 18 54 24 65 161
Bone union on flextion- extension radiography, numbers of segments (%) -y, > 0.999 0.868 0.095
 Instability (–) 17(94.44) 51 (94.44) 21(87.50) 56 (86.15) 145
 Instability (+) 1 (5.56) 3 (5.56) 3 (12.50) 9 (13.85) 16
 Total 18 54 24 65 161
Average period of bone union by*CT (month) 3.25±0.87 3.65±1.27 0.332 5.67±1.00 5.65±0.99 0.962 < 0.001
Bone union rate by *CT (%) 94.44 92.59 0.784 79.17 76.92 0.821 0.009

*CT: computed tomography.

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