ABSTRACT
Objectives:To investigate the clinical outcome of Smiley face rod fixation system for lumbar isthmic spondylolysis.Methods:From January 2016 to June 2017,18 patients with isthmic spondylolysis were treated with smiley face screw-rod fixation system.There were 13 males and 5 females,with an average age of 28.2±3.2(25-32) years old.The average disease duration was 16.3±5.7(7-24) months.L5 isthmic spondylolysis was involved in all cases.All patients had been followed up at 3 months and 1 year after surgery.The preoperative and postoperative visual analogue scale(VAS) and Oswestry disability index(ODI) were compared.The X-ray and CT scan were evaluated to analyze the change of range of motion in the lumber spine and the bony fusion rate.Results:The mean operation time was 90.0±24.1 minutes.The average blood loss was 140±15ml.The average follow-up was 18.5±5.0 (12-24) months.The VAS at 3 months after operation was 3.0±1.2,and the ODI was (17.2±4.5)％ respectively,which showed significant differences compared with the preoperative ones[7.3±2.5 and (67.0±15.1)％](P＜0.05).The VAS and ODI at 1 year after operation were 1.0± 0.6 and (9.1±5.3)％,which showed significant differences compared with 3 months postoperation(P＜0.05).The range of motion between L5 and S1 was 13.1°±2.1° and the incidence of lumbar instability was 83.3％(15/18) preoperatively;it was 9.3°±1.6° and 11.1％(2/18) postoperatively,and there was statistic difference(P＜0.05).All patients achieved bone fusion in the isthmic defect 1 year after operation.Conclusions:The Smiley face rod fixation is a reliable treatment for lumbar spondylolysis with the advantage of minimal invasive,less nerve interference,and to restore normal anatomical structure,maintain the lumbar spine stability.
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Objective To observe the effect of tendon-bone healing after anterior cruciate ligament reconstruction through BFGF and PDGF.Methods Based of seventy two healthy matured New Zealand white rabbits underwent ACL reconstruction.Devide three groups through different methods,group BFGF,group PDGF,group normal.Results The maximum loads of group BFGF and PDGF after 2 and 5 weeks are higher than group normal,there was significant difference in maximum loads (P <0.05).The max stiffness of group BFGF and PDGF after 2 and 5 weeks are higher than group normal,there was significant difference in maximum loads(P <0.05).Conclusion The group BFGF and PDGF can promote tendon-bone healing by increasing the vascularization and blood vessels of the tendon-bone interface and vascular endothelial growth factor.In biomechanics,group BFGF and PDGF can pro-mote maximum loads、max stiffness and hardness of tendon-bone healing.
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Objective To study the accuracy in placement pediele screws with different method in the selection of entrance point in surgery of scoliosis.Method 27 cases with Lenke Ⅰ type of Adolescent Idiopathic Seoliosis(AIS)from Mar 2006 to September 2008,were retrospectively analyzed.14 eases were randomly divided into standard group(group A)and the entrance point was the same one as described in literatures.13 cases were randomly divided into individually group(group B)and the entran~point wag designed by surgeons on CT scans before surgery.There was no statistical difference in the mean age at time of surgery,Cobb angle on coronal and saggital(T5T12)plane,flexibility and rotational degree of apical vertebra preoperatively between two groups.Result There was no statistical difference in the time of surgery,blood losing,fixation segments,correction rate in Cobb angle and rotational degree of apical vertebra between two groups.The accuracy in placement pedicle screws in individually group was higher than that in control group(P＜0.01).Conclusion The accuracy in placement pedicle screws in the surgery of scoliesis can be improved by individual selection of entrance point.
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Aim To introduce and apply artificial lumbar interverte-brai disc replacement for the treatment of lumbar disc degenerative diseasesand lumbar disc herniation accompanying evident disc space narrowing andinvestigate the regulation of its recovering spinal motion and carrying a-bility. Methods Thirty-one cases (37 discs) of artificial lumbar disc re-placement were performed using SB Charite Ⅲ from April 1998 to April2000. Among them, disc degenerative diseases were in 16 cases (18discs), disc herniation accompanying evident disc space narrowing in 13cases ( 17 discs), rec urrent dise herniation in 2 cases. The rehabilitationtraining was done under postoperative instructions. Results All the caseswere followed up from 17 to 41 months (averagely 26 months) untilSeptember 2001. The clinical outcomes were excellent in 23 cases, goodin 6 cases, fair in 2 cases. The mobility of the operated level had 4.0°anterior flexion and 5. 1° posterior extension after operation and 9.1° ontotal mobility. Meanwhile, the operated intervertebral space got an average4. 2 mm higher than that before. Because of technical problem, a slightdisplacement of the core occurred in one case without any clinical symp-toms and signs. Conclusion Artificial lumbar disc replacement can re-covery spinal motion and carrying capacity and provides a new kind ofoperation for the treatment of lumbar disc degenerative diseases and discherniation accompanying evident disc space narrowing.