Objective To study the clinical effect of expert tibial nail (ETN) in the treatment of distal tibial fractures. Methods From October 2007 to June 2008,ETN was performed in 13 patients with distal tibial fractures. There were eight males and five females, at age range of 25-47 years (33.8 on average). According to AO/ASIF classification, there were three patients with 43-A1 fractures, four with 43-B1 fractures, four with 43-B2 fractures and two with 43-C1 fractures. All the patients were with close fractures except for three patients with Gustilo-Anderson type Ⅰ fractures. Their clinical data were analyzed for assessing the clinical effect of ETN. Results All patients were followed up for a mean time of 8.4 months (range 3-13 months), which showed that all the fractures obtained stable fixation and sound healing, with no complications like breakage of ETN, wound infection, fracture nonunion or limb shortening. According to Johner-Wruhs standard, the functional results were excellent in 10 patients and good in three. Conclusion ETN has advantages of minimal invasion, shorter operation time, stronger fixation,better soft tissue protection and better functional recovery for distal tibial fractures in comparison with traditional open reduction and buttress plate fixation.

Objective To evaluate preliminary effect of In-Space percataneous interspinous spacer in the treatment of lumbar instability.Methods Data of 18 patients who had undergone interspinous spacer implant for lumbar instability from May 2009 to June 2011 were retrospectively analyzed.There were 10 males and 8 female,aged from 39 to 58 years.All patients suffered from varying degrees of lower back pain induced by lumbar hyperextension,as well as radiating and segmental pain of unilateral lower limb.The visual analogue scale (VAS) and Oswestry disability index (ODI) were used to evaluate clinical outcomes.The pre-and postoperative interspinous distance,trailing edge height of intervertebral space,foraminal width,foraminal height,segmental lordotic angle and lumbar range of motion were tested and compared.Results All patients were followed up for 18 to 36 months.The VAS score improved from preoperative 7.9±2.1 to 3.1±1.3 at 6 months postoperatively and 1.5±0.8 at final follow-up.The ODI improved from preoperative 82.1％±13.1％ to 54.7％±14.8％ at 6 months postoperatively and 10.1％±2.5％ at final follow-up.The postoperative interspinous distance,trailing edge height of intervertebral space,foraminal height,foraminal width,segmental lordotic angle and lumbar range of motion were 9.29±1.43 mm,11.28±0.85 mm,21.27±1.01 mm,10.83±0.73 mm,7.62°±0.74° and 6.34°±0.81°,respectively.Wound healed smoothly in all patients,and there were no complications such as spinous process fracture,spinal cord injury,cerebrospinal fluid leakage,device displacement and device dislocation.Conclusion It is easy and safe to use In-Space percataneousinterspinous spacer in the treatment of lumbar instability,and the preliminary effect is satisfactory.

Objective: To investigate the trends in incidence of viral hepatitis in Yuxi City, Yunnan Province from 2004 to 2022, so as to provide insights into the management of viral hepatitis. Methods: Data of viral hepatitis cases in Yuxi City from 2004 to 2022 were retrieved from the China Disease Prevention and Control Information System. The temporal, human and spatial distribution of viral hepatitis cases were analyzed using a descriptive epidemiological method, and the trends in incidence of viral hepatitis were evaluated in Yuxi City from 2004 to 2022 using annual percent change (APC) and average APC (AAPC). Results: A total of 37 430 viral hepatitis cases were reported in Yuxi City from 2004 to 2022, with an average annual incidence rate of 91.27/105, and the incidence showed a tendency towards a rise (AAPC=12.686, P<0.05). There were 29 229 cases with hepatitis B, 5 796 cases with hepatitis C, 1 451 cases with hepatitis A, 520 cases with hepatitis E and 434 cases with unclassified hepatitis reported in Yuxi City, with average annual incidence rates of 71.27/105, 14.13/105, 3.54/105, 1.27/105 and 1.06/105, respectively. The average annual incidence rates of viral hepatitis were 98.24/105 and 78.94/105 among men and women, which both appeared a tendency towards a rise (AAPC=12.415% and 12.581%, both P<0.05). The highest average annual incidence of viral hepatitis was seen among residents at age of 25 to 29 years (139.89/105), with the lowest seen among residents at ages of 0 to 4 years (11.38/105), and the average annual incidence of viral hepatitis appeared a tendency towards a rise with age (P<0.05). The highest average annual incidence of viral hepatitis was seen in Huaning County (234.24/105), with the lowest seen in Chengjiang City (26.11/105), and the average annual incidence appeared a tendency towards a rise in Xinping County from 2004 to 2022 (AAPC=21.451%, P<0.05). Conclusions The reported incidence of viral hepatitis appeared a tendency towards a rise in Yuxi City from 2004 to 2022, with hepatitis B as the main type. High incidence was seen among men and adolescents. The viral hepatitis control strategy requires to be adjusted with adaptations to high-incidence hepatitis subgroups, residents and regions.

Objective To investigate the difference of short-term clinical efficacy between decompressive laminectomy into In-Space and simple decompressive laminectomy for treatment of lumbar spinal stenosis with vertebral instability.Methods Thirty-three patients with lumbar spinal stenosis with vertebral instability admired from May 2009 to July 2010,were divided into two groups by random number table.Group A of 16 cases was treated with laminectomy decompression and placement In-Space,group B of 17 cases was treated with laminectomy decompression.Lumbar anteroposterior,lateral and flexion-extension X-ray films,preoperatively,and the follow-up were used to measure anterior and posterior disc height,foraminal height,segmental lordotic angle at surgical level.Using Oswestry disability index (ODI) and the visual analogue scale (VAS) to evaluate the clinical efficacy.Results All patients were followed up for (13.20 ± 2.91 ) months (range 6 to 21 months).The anterior disc height after operation of group A was slightly decreased compared with the preoperative(P＞ 0.05 ),the posterior disc height at 1 day after operation and foraminal height after operation of group A were significantly increased compared with the preoperative (P＜ 0.05).The anterior and posterior disc height,foraminal height of group B at 1 day,1 month,3 months after operation were no significantly different compared with the preoperative (P ＞ 0.05 ),at 6 months after operation and the end of follow-up were significantly decreased compared with the preoperative or 1 day after operation (P ＜ 0.05 ).Activity of lumbar vertebra by preoperative 9.86° ± 1.90° decreased to the end of followup 5.60° ± 2.02°in group A,while activity of lumbar vertebra by preoperative 9.89° ± 2.00°increased to the end of follow-up 10.76° ± 3.14° in group B.At the end of follow-up,lumbar back pain VAS,ODI score [ (2.02 ± 1.98 ),( 20.18 ± 18.80) scores ] of group A were significantly lower than those of group B [ (4.15 ±2.36),(30.39 ± 16.62 ) scores ],the differences were statistically significant (P ＜ 0.05 ).No patient suffered In-Space loosening,fracture and emerge.Conclusion The operation of In-Space can maintain spinal mobility and stability as well as avoiding lumbar vertebral instability,and its short-term efficacy is satisfactory.

Several studies have evaluated the association between vitamin D receptor, matrix metalloproteinase 3 (MMP-3) polymorphisms and the risk of intervertebral disc degeneration susceptibility. The findings were inconsistent. This meta-analysis aimed to systematically assess the association between vitamin D receptor, MMP-3 polymorphisms and the risk of intervertebral disc degeneration susceptibility. A search of various databases was done covering all papers published until December 31th, 2014. Eight, 4, 3 studies were finally included that addressed the risk of intervertebral disc degeneration susceptibility and vitamin D receptor FokI (rs2228570), ApaI (rs7975232), and MMP-3 (rs731236) polymorphisms, respectively. FokI (f vs. F: summary odds ratio [OR], 1.13; 95% confidence interval [CI], 0.76–1.69; ff vs. FF: OR, 1.02; 95% CI, 0.59–1.77; ff vs. Ff/FF: OR, 1.05; 95% CI, 0.70–1.58), ApaI (a vs. A: OR, 0.73; 95% CI, 0.45–1.19; aa vs. AA: OR, 0.53; 95% CI, 0.22–1.25 p=0.14; aa vs. AA/Aa: OR, 0.69; 95% CI, 0.53–0.89) in the vitamin D receptor gene and MMP3 polymorphisms (5A vs. 6A: OR, 1.92; 95% CI, 0.77–4.80; 5A5A vs. 6A6A: OR, 2.17; 95% CI, 0.75–6.24; 5A5A vs. 5A6A/6A6A: OR, 1.58; 95% CI, 0.72–3.44) were not obviously associated with risk of intervertebral disc degeneration susceptibility. FokI, ApaI polymorphisms in the vitamin D receptor gene and MMP-3 polymorphism are not obvious risk factors for intervertebral disc degeneration susceptibility.
Intervertebral Disc Degeneration* ; Intervertebral Disc* ; Matrix Metalloproteinase 3* ; Odds Ratio ; Receptors, Calcitriol* ; Risk Factors ; Vitamin D* ; Vitamins*

Objective To investigate the effect of bone cement distribution on efficacy of vertebroplasty.Methods From January 2013 to June 2016,a total of 132 cases (132 vertebrae) with single segment osteoporotic thoracolumbar vertebral fractures underwent parallel vertebroplasty surgery,and there were 57 male,75 female,with an average age of (71.6±2.2) years old (ranged from 65 to 86 years old).On the basis of the postoperative X-ray films of bone cement distribution were divided into 3 groups.The bone cement was biased to the lateral side of the vertebral body (partial group,35 cases),the bone cement was over the vertebral midline,but not completely filled with contralateral vertebral body (near midline group,46 cases),and the bone cement was filled with bilateral vertebral body (bilateral group,51 cases).There were 15 males and 20 females in the partial group,aged (70.3±5.3) years old;20 males and 26 females in the proximal midline group,aged (72.1±3.2) years old;22 males and 29 females in the bilateral group,aged (71.2±4.6) years old.Local anesthesia was used to make the patient prone to operate on the operating bed.The head and tail of the bed were increased at the same time slightly and vertebral compression fractures reduction was performed.Bone cement was injected into the vertebral body through partial or bilateral transpedicular approach.The visual analogue scores (VAS) were measured of preoperation,postoperation and 3,6,12 months after surgery.Analysis of variance for each group and VAS before and after operation,and postoperative complications were observed too.Results All the 132 cases were followed up for 1-12 months,with an average of (11±0.3) months.There were statistically significant differences in the immediate effect of postoperation among partial group,near middle group and the bilateral group (F=90.472,P=0.000),VAS score in partial group was lower than that in bilateral group (t=11.433,P=0.000),but higher than that in near midline group (t=11.106,P=0.000),and the differences were statistically significant,but there was no significant difference between near midline group and bilateral group (t=0.581,P=0.563).VAS score showed no statistically difference among the three groups 3 months,6 months and 1 year follow-up after operation (F=0.892,P=0.413;F=0.342,P=0.713;F=0.834,P=0.441).In 3 eases of partial group,the pain was not relieved due to unfilled cement until the contralateral bone was injected into the bone cement.However,there were 11 cases of cement leakage in partial group,13 cases in near midline group,and 3 cases in bilateral group.Conclusion The distribution of bone cement is one of the main factors affecting the clinical efficacy after vertebroplasty,and the clinical effect of distributing the midline of vertebral body is better than the one side.