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1. Key words: spondylolysis, spondylolisthesis, magnetic resonance imaging, fusion, spondylodesis.

2. BACKGROUND: The incidence rate of spondylolysis of lumbar vertebral arch in recruits is higher during the training, and it affects the normal training.

3. The incidence rate of spondylolysis of vertebral arch before and after training: Before training, 5 cases had spondylolysis of L5 vertebral arch, and the incidence rate was 5%.

4. Methods 25 cases with lumbar spondylolysis were treated with isthmic debriment, local bone graft and pedicle screw tension band fixation.

5. Conclusion MPR images of 64-slice CT can get spondylolysis images of different angles and planes, and it has important value in improving diagnostic ability of CT for this disease.

6. Results The characteristic performance that the spondylolysis of lumbar spine was the bone wreath consecution to break off.

7. Objective: To improve CT diagnostic level of spondylolysis and spondylolisthesis of the lumbar spine.

8. Conclusion. This case report discusses the rare occurrence of multiple lumbar pedicle fractures and pars interarticularis (spondylolysis) fractures in a patient with osteopetrosis.

9. Summary of Background Data. Spondylolysis is thought to be caused primarily by a fatigue fracture and spondylolytic tissue has been recognized as being a fibrocartilaginous mass.

10. Methods 26 young cases with lumbar spondylolysis acre treated with isthmic debriment, local bone graft and lamina lag screw fixation.

11. The authors conclude that spondylolysis is mainly the fatigue fracture due to locally increased stress and is contributing most by backward extension of lumbar spine.

12. Lumbar spondylolysis, a common injure in badminton athlete(sentencedict.com), greatly obstructs maintaining and enhancing athletes competitive levels.

13. Summary of Background Data. Spondylolysis and spondylolisthesis are prevalent in the general population; however, the relationship between these conditions and LBP is controversial.

14. Conclusion. Spondylolysis is a pseudarthorosis of the pars interarticularis and the spondylolytic tissue tends to develop noninnervated ligament-like tissue with an enthesis structure.

15. Methods 26 young cases with lumbar spondylolysis were treated with isthmic debriment, local bone graft and lamina lag screw fixation.

16. Conclusion: The power of iliolumbar ligament of L5 spondylolysis with L4-5 disc hernia is higher than that with L5 spondylolisthesis.

17. The symptomatic spondylolysis or minimal degree of spondylolisthesis may be repaired of by bone grafting and internal fixation with screw and wires.

18. Methods Twenty-four lumbar spondylolysis patients with no vertebral surge were treated with single vertebra reduction fixation and isthmic debridement and bone grafting.

19. CONCLUSION: The incidence rate of spondylolysis of vertebral arch is associated with the training intensity.

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20. It is vital to correct the deformities of the scoliosis, loss of lordosis, spondylolysis and spinal rotation.

21. Objective To identify the potential relation of geometric characteristics of the lumbar spine to the isthmic spondylolysis and degenerative joints under loading.

22. Conclusion: Sagittal reconstruction can completely display the isthmus of vertebral arch and the features of spondylolysis in detail.

23. Objective To investigate direct bone graft repair with lag screw and tension band fixation technique and its value for the treatment of adolescence spondylolysis.

24. OBJECTIVE: To analyze the correlation of the incidence rate of spondylolysis of lumbar vertebral arch with training and the original lesions at waist in recruits.