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@#Objective To investigate the effects of different types of tricuspid regurgitation, implantation positions, and device models on the treatment outcomes of K-Clip for tricuspid regurgitation using numerical simulations. Methods Three-dimensional reconstruction of the heart model was performed based on CT images. Two different regurgitation orifices were obtained by modifying the standard parameterized tricuspid valve leaflets and chordae tendineae. The effects of different K-Clip models at different implantation positions (posterior leaflet midpoint, anterior-posterior commissure, anterior leaflet midpoint, posterior septal commissure) were simulated using commercial explicit dynamics software Ls-Dyna. Conclusion For the two types of regurgitation in this study, clipping at the posterior leaflet midpoint resulted in a better reduction of the regurgitation orifice (up to 75% reduction in area). Higher clamping forces were required for implantation at the anterior leaflet midpoint and posterior septal commissure, which was unfavorable for the smooth closure of the clipping components. There was no statistical difference in the treatment outcomes between the 18T and 16T K-Clip components, and the 16T component required less clamping force. Therefore, the use of the 16T K-Clip component is recommended.
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Objective:To evaluate the correlation of serum vitamin D (VitD) and parathyroid hormone (PTH) with insulin resistance and islet β-cell function in patients with type 2 diabetes mellitus (T2DM), and to analyze the role of serum VitD and PTH in the progression of T2DM.Methods:A total of 376 T2DM patients hospitalized in endocrinology department from January 2018 to January 2021 were selected. The baseline data were collected and the biochemical indexes were determined. Patients were divided into 3 groups according to serum VitD level, including 220 cases in deficiency group [25-(OH)D ≤ 20 μg/L], 107 cases in insufficiency group [25-(OH)D>20 and ≤ 30 μg/L] and 49 cases in sufficiency group [25-(OH)D > 30 μg/L]. Meanwhile, 31 of the patients were classified into PTH decreased group (PTH < 25.16 ng/L), 137 into normal PTH group (PTH ≥ 25.16 and < 38.35 ng/L) and 208 into PTH elevated group ( PTH ≥ 38.35 ng/L). According to body mass index (BMI), patients were divided into normal weight group (18.5 kg/m 2 ≤ BMI ≤ 23.9 kg/m 2), overweight group (BMI ≥24 and ≤ 27.9 kg/m 2) and obese group (BMI ≥ 28 kg/m 2). Results:Among the three groups defined by serum VitD level, comparisons of glucose metabolism and calcium and phosphorus metabolism indicators showed no significant differences in BMI, fasting insulin (FINS), fasting plasma glucose (FPG), homeostasis model assessment of insulin resistance index (HOMA-IR), serum calcium and phosphorus (all P > 0.05). The levels of glycated hemoglobin (HbA1c) and PTH in vitamin D deficiency group and sufficiency group were significantly lower compared with vitamin D deficiency group (both P < 0.05). Among the three groups defined by PTH level, there were no significant differences in BMI, FINS, FPG, HbAlc, HOMA-IR, and serum calcium (all P > 0.05). Serum phosphorus in the PTH elevated group was significantly lower compared with PTH decreased and normal PTH group ( P = 0.000), and VitD in the PTH elevated group was significantly lower compared with PTH decreased group ( P = 0.002). There were significant differences in age and blood phosphorus among the three groups defined by BMI level (all P<0.05). According to the analysis of clinical indexes of different nationalities, the level of VitD in Mongolians was significantly higher than that in Han nationality patients ( P <0.034). Spearman correlation analysis showed that VitD was negatively correlated with PTH and HOMA-IR and positively correlated with serum calcium. PTH was negatively correlated with serum calcium and phosphorus, and positively correlated with HOMA-IR. There was a significant negative correlation between normal PTH and VitD. Multiple linear regression analysis showed that HOMA-IR and homeostasis model assessment of β-cell function (HOMA-β) were protective factors, and FPG and FINS were risk factors for HOMA-IR and HOMA- β. Conclusion:There is a negative correlation between VitD and insulin resistance, and a positive correlation between PTH and insulin resistance, suggesting that VitD and PTH are possibly two impacting factors for T2DM pathogenesis.
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OBJECTIVE To invest igate the distribution of pathogenic bacteria and the antibiotic susceptibility of otitis media in plateau areaandto guide clinical drug application rationally. METHODS Middle ear secretions were collected from 218 inpatients and outpatients(220 ears) with otitis media in our department from December 2016 to January 2018 and were performed by isolation and identification of pathogenic bacteriaand drug sensitivity test. RESULTS 1. 152 strains of microbes were isolatedincluding 125 casesof bacterial infection and 8 cases of fungal infection. 2. The gram-positive bacteria in middle ear effusions of chronic suppurative otitis media was higher than those of cholesteatoma, of which Staphylococcus aureuswas the most frequently isolated pathogen. While Pseudomonas aeruginosa was the highest in cholesteatoma. 3. The antibiotic sensitivity of pathogenic bacteria varies from strain to strain. CONCLUSION Staphylococcus aureusand Pseudomonas aeruginosa were the main pathogenic bacteria. Common pathogenic bacteria were resistance to penicillin and levofloxacin, which were commonly used in clinic. Therefore, bacterial culture should be carried out and rational drug use should be guided.
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Objective To discuss the characteristics,growth and development of atlantoaxial pedicle in preschool children,and to provide the basic theoretical basis for the design,production and clinical application of pedicle screw technique in the treatment of atlantoaxial disease in preschool children.Methods Excluded patients with atlantoaxial fractures,deformities,tuberculosis and tumor,the clinical data of 60 children aged from 3 to 6 years old with cervical spondylolisthesis were collected.The original CT images were reconstructed in DICOM format and the subjects were reconstructed with Mimics software.The subjects were grouped by age to measure and analyze the atlantoaxial pedicle correlation.Results The pedicle width(PW),pedicle height(PH) and total length of pedicle bone channel (PL) increased gradually with age.The PW/PH ratio of the vertebrae(C1) is greater than 1.0,and that is, the width of the pedicle of the C1 pedicle is greater than the height.The PW/PH ratio of the vertebral (C2) is less than 1.0,which means the width of the pedicle of the C1 pedicle is less than the height.Conclusion The growth and development of spine in preschool children are fast, and the pedicle of atlantoaxial calculus in different age groups has different developmental characteristics.In this study,the diameter of the pedicle of the atlantoaxial pedicle in the 3 to 6 year old children is increasing with age.The pedicle screw with the smallest diameter of 3.5 mm can be implanted into the atlantoaxial pedicle with feasibility in theory.
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BACKGROUND:Fetal congenital malformation is an important cause of perinatal fetal death,in which neural tube defects (NTDs) in prenatal deformity screening is more common.In recent years,with the deterioration of environment and the increase in the number of elderly maternal,patients with NTDs are increasing,bringing serious social and family economic burden.Therefore,modern imaging methods are used to provide theoretical basis for prenatal screening NTDs.OBJECTIVE:To study the development of fetal spinal cord morphology by means of imaging,so as to provide reference for the diagnosis of prenatal screening.METHODS:A computer-based retrieval of CNKI,WanFang,VIP,CBM and PubMed databases was conducted for the report on the development of fetal spinal cord from 1959 to 2017,and their different imaging studies were summarized.RESULTS AND CONCLUSION:In view of the impact of radiation on pregnant women and the fetus,in order to better imaging,for different organizational structures using different detection methods.(1) X-ray and CT:due to radiation damage to pregnant women and fetuses,they are only used for the cadaveric spine ossification center development,X-ray has been abandoned,and CT has not seen a live report.(2) Ultrasound is easy to operate,and non-invasive for pregnant women and fetuses,which is the preferred method of inspection.(3) MRI,as an important supplement means of ultrasound,can provide imaging basis for the prenatal assessment of fetal spinal cord development and diagnosis of related diseases.(4) Noticeably,harm of radiation to fetus should be considered.
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Objective To investigate the morphological regularity of the thoracic pedicle screw in 4 to 12 years old children by the digital technology,and to provide the theoreticl basis for thoracic pedicle screw fixation in children.Methods A total of 60 healthy children aged from 4 to 12 years old with computed tomography(CT) data of thoracic spine were divided into three groups by age,each group 20 cases.Then they were examined by MIMICS software and the parameters of pedicle width(PW),pedicle height(PH),the length of screw path(SL),e angle and f angle were measured.Results The pedicle width,pedicle height,the SL of the pedicle generally showed a rising trend with advancing age.There were significant differences in the PW,PH and LS between the three group(P0.05).E angle of the pedicle generally showed a decreasing trend with increasing vertebral order,and e angle of T11 to T12 showed negative angle.The f angle showed a wavy descending trend.Conclusion There was significant difference in correlation parameters of thoracic pedicle with increasing age in healthy children,which indicates that the pedicle screw fixation for the kind of children should be performed based on 'the Principle of individualization' to improve the success rate of surgery.
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Objective To explore the morphological characteristics and change rule of thoracic joint angles in children aged from 10 to 12 years through thinner CT scanning and 3D reconstruction,and to provide theoretical basis for early diagnosis,treatment and prevention.Methods Totally 30 normal cases aged from 10 to 12 years were admitted into this study.There was no bone destruction,deformity,fractures,tumors and spine surgery involved.DICOM 3.0 data of multi-slice spiral CT (0.625 ～ 1.25 mm),ranging from T1 to T12,were used for 3D reconstruction,measurement and statistical analysis.Results The difference between left and right sagittal section angle of zygopophysis was less than 10°.There was no significant differences between T1,T11,and T12for sagittal section angle of upper zygopophysis (P ＞ 0.05).So was it between T3,T4,T9,T10 and T11 for sagittal section angle of lower zygopophysis (P ＞ 0.05).While there were significant differences between others(P ＜ 0.05).The was no significant difference between left and right coronal plane angle of zygopophysis (P ＞ 0.05).Coronal plane angle of lower and upper zygopophysis tended to be ‘ spike-like’,and the maximum points were at T7 to T9.For horizontal plane angle,left and right upper zygopophysis made significant differences between T2,T4,T8,T10 and T12 only,so did T7 lower zygopophysis (P ＜ 0.05).Horizontal angle of upper zygopophysis tended to be stable in the upper thoracic both in the left and right side,while a decreasing trend was shown in lower thoracic.Horizontal angle of lower zygopophysis showed a decreasing trend generally except individual vertebrae.Both upper and lower zygopophysis showed negative angle at T11 and T12 levels.Conclusion Thoracic joint angles(coronal,sagittal and horizontal angle) in children aged from 10 to 12 years can directly reflect the developmental regularity with growth,and it verified the tendency that horizontal facet joints of the cervical spine gradually changes to coronal facet joints thoracic spine and then changes to sagittal facet joints of lumbar spine.And the left and right side facet joints are basically symmetrical with the angle difference less than 10°.
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Objective To explore the effect of 20°trendelenburg position on hemodynamics during induction of general anesthesia of patients under gastrectomy.Methods One hundred and eighteen patients (77 males and 41 females,aged 50-60 years,ASA physical status Ⅰ or Ⅱ),scheduled for elective radical gastrectomy,were randomly divided into group A (n=40),group B (n=38) and group C (n=40).In group A,patients were placed in the supine position during induction of anesthesia,and vasopressors was administered when hypotension occurred.In group B,patients were placed in the supine position during induction of anesthesia and was placed in the 20°trendelenburg position when hypotension occurred,and vasopressor would be administered if blood pressure was not restored.In group C,patients were placed in the 20°trendelenburg position during induction of anesthesia,and vasopressors was administered when hypotension occurred.In all groups Lactated Ringer′s was infused at 15 ml·kg-1·h-1in 30 min before induction.Anesthesia was induced with propofol 2 mg/kg,sufentanil 0.5 μg/kg,rocuronium 0.9 mg/kg.The occurrence of hypotension and the total amounts of drug administrations were doccumented.Results Nineteen patients (47.5%) in group A,fourteen patients (36.8%) in group B and six patients (15.0%) in group C developed hypotention.The incidence of hypotension in group A and B was significantly higher than that in group C (P<0.05).In all groups the total dosage of ephedrine was used.Phenylephine was only used in the group A at a dose of 26.5±0.14 μg.The amounts of drug administrations in group B and C were significantly lower than that in group A (P<0.05).Two patients in group A went into a refractory hypotensive state.However,no patients in all groups fell into a serious arrhythmia state,so atropine was not used.Conclusion The 20°trendelenburg position during induction of general anesthesia of patients during gastrectomy can prevent hypotension during induction.This position is effective in the management of hypotension after the induction of general anesthesia and can decrease the amounts of drug administrations during induction of general anesthesia.
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Objective To study the protein levels of fibronectin (Fn) in the sinoatrial node tissues of hearts caused by electric shock death ,and to provide a new theoretical basis for the diagnosis of electric shock death and the identification of death time.MethodsUsing immunohistochemical technique(S-P method) to detect protein levels of 15 cases of human sinoatrial node following electrocution(human experimental group),15 cases of human sinoatrial node with severe traumatic cerebral injury(human control group),35 cases of rabbit sinoatrial node following electrocution(rabbit experimental group ,divided into7 groups according to different sampling time: 0 h ,1 h ,3 h ,6 h ,12 h,24 h.48 h),and 35 cases of rabbit sinoatrial node with broken neck executed(rabbit control group ,divided int0 7 groups according to different sampling time :0 h,1 h.3 h,6 h.12 h.24 h,48 h).ResultsFn positive expression rate in human experimental group was 100% while it was 6.67% in the human control group,and the differences were statistically significant (P < 0.01 ).The Fn expression can be seen after electric shock immediately in the rabbit experimental group,and there was statistical difference compared with the rabbit control group (P < 0.05).Distribution of Fn expression became more and more widely after 3 hours t0 12 hours in the rabbit experimental group ,and there was significant difference compared with the rabbit control group(P < 0.01).The Fn expression began to decrease 24 hours after electrocution,ancl it still had statistical significance 48 hours after electrocution compared with the rabbit control group (P < 0.05).Conclusion Electric shocks significantly enhanced the expression of Fn protein levels in the sinoatrial node tissues , and optical density of Fn positive expression has a regularity change along with the extended time of death.These results could provide a theoretical reference basis for forensic diagnosis of electrocution and identification of death time.
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BACKGROUND:With the change of modern living habits, the incidence of cervical disease and cervical related diseases is increasingly at younger age. Based on this feature, the discussion of the relationship between the cervical spine and vertebral body as wel as regular feature can provide theoretical basis for early diagnosis, prevention and treatment of cervical spondylosis. OBJECTIVE:To analyze the correlation structure of the cervical vertebra uncinate process with the vertebral body and intervertebral foramen among adolescents. METHODS:A total of 66 cases without injuries, neurological symptoms or signs of 6 to 20 years old were scanned with multi-row thin-slice spiral CT from C1-T1. The original data were loaded in DICOM format into three-dimensional reconstruction software for measurement and statistical analysis. RESULTS AND CONCLUSION:(1) In addition to uncinate process height and vertebral body height, the uncinate process spacing, uncinate base width and diameter between the vertebrae and a uncinate process base radius vector length and vertebral bodies were positively correlated (P<0.05). (2) Uncinate high uncinate base long uncinate base width and height between the foramen in addition to the uncinate process had a positive correlation with the length of the substrate (P<0.05). (3) In conclusion, there is a certain correlation in juvenile cervical uncovertebral joint between the uncinate process and vertebral body and intervertebral foramen. With the growth of age, cervical activity is increased and the uncinate hyperplasia, trauma, and fracture can oppress spinal nerve within the intervertebral foramen to cause corresponding nerve root type of cervical spondylosis.
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Objective To discuss the differences of immunofluorescence pathological test results in four types of syndromes for lupus nephritis(LN) patients. Methods A retrospective study was carried out in 116 LN patients who had performed renal biopsy. The patients were differentiated into four syndrome patterns of excessive heat-toxicity, liver-kidney yin deficiency, qi-yin deficiency, and spleen-kidney deficiency. The results of immunofluorescence pathological tests were recorded for the analysis of the differences among the four patterns. Results (1)Of 116 LN patients, 59 were classified into spleen-kidney deficiency, 30 into excessive heat-toxicity, 14 into liver-kidney yin deficiency, and 13 into qi-yin deficiency. (2)The positive expression rate of IgA, IgG, IgM, C3, and Fi fluorescen ce antibody differed in the 4 syndrome patterns of LN patients(P0.05). Conclusion The immune complex deposition in LN patients is dominated by IgA and C3 antibodies deposition, and the“full-house” immunofluorescence staining is commonly seen in the syndrome of excessive heat-toxin type. But the results of immunofluorescence pathological tests can not be used as the evidence to tell the differences in the 4 syndrome patterns of LN patients.
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Objective To study the developmental patterns and aging characteristics of anterior intervertebral disc and spinal canal based on anatomy CT scan and three dimensional reconstruction imaging measurement in the adolescents ages from 12 ~18 years old,and to provide the anatomical basis for the treatment and prevention of disc herniation diseases.Methods A total of 30 adolescents,who were with normal spines and without any the problems of nervous system,were selected to do CT scan of lumbosacral vertebrae through dual-source 64-slice spiral CT.CT original data of lumbosacral,which were translated into DICOMformat,were measured and analyzed statistically with Mim-ics software.Results There was no significant difference among the intervertebral disc and the superior sagittal diameter of the spinal canal, which were not influenced by gender (P >0.05).The intervertebral disc and the superior sagittal diameter of the spinal canal would increase with age with wavy trends,and there were some significant differences(P <0.05).Conclusion The anatomy parameters of lumbosacral disc and spinal changed regularly.In order to achieve satisfactory results of the lumbosacral disease treatment,it must be combined with individual radiographic findings,biomechanics and materials science,etc.
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BACKGROUND:Artificial knee joint replacement is the main surgical method for the treatment of severe knee joint deformation, but due to the limited existing knee prosthesis type. The stature of Fujian population in southeast China was shorter than that of the north. The size of artificial knee joint usual y did not fit for patients in clinic. The substitution effect was poor. OBJECTIVE:To measure the geometric parameters of proximal surface and cross-section of adult female tibia in southeastern area of Fujian Province of China, and provide basic data for design and replacement of artificial knee joint in females. METHODS:We chose 85 cases of dry female skeleton in southeastern area of Fujian Province of China, measured tibial plateau width, medial tibial plateau width and anteroposterior diameter, lateral tibial plateau width and anteroposterior diameter. We col ected clinical normal proximal tibial CT data of 36 patients (38-65 years old), with scan range of 30 cm (intercondylar eminence 30 cm) and layer thickness of 0.625 mm. Mimics 16.0 three-dimensional reconstruction software was used to measure above indexes and cut the reconstructed models with thickness of 3 mm, total y 10 layers. We divided its widest distance into four equal parts, and measured tibial anteroposterior diameter on three points. Statistical software was used to analyze the linear relationship between the data. RESULTS AND CONCLUSION:The experiment has successful y obtained geometric parameters of tibial specimens of adult females in southeastern area of Fujian province of China. Tibia platform inside and outside diameters were greater than the width inside and outside;inside and outside diameter and inside and outside width were similar. Ten segment planes of tibia, inside and outside diameters were always less than middle anteroposterior diameter. Three groups of data increased firstly, and then reduced. There were positive correlations between tibia length and width of the medial tibia platform, the lateral tibia platform width and anteroposterior diameter, the medial tibia platform width and anteroposterior diameter, and the lateral tibia platform width and anteroposterior diameter (P<0.05). These results suggested that relevant parameters of tibial plateau adult women in southeastern area of Fujian province of China showed some regular changes. Our results may provide quantitative reference data for the design and operation of artificial tibial plateau.
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BACKGROUND:Articular process of joint is an important bony structure to maintain the spinal stability and normal physiological activities. Clinical study found that bilateral articular process asymmetry is also one of the causes of vertebral degeneration, but the existing research mainly focuses on the adult, and give priority to with cervical vertebra and lumbar vertebra. OBJECTIVE:To explore the morphological and developmental characteristics of thoracic facet joints and bony structures of 10 to 12-year-old children and compare with data of adults. METHODS:A total of 30 normal cases aging from 10 to 12 years were admitted into this study. No cases experienced bone destruction, deformity, fractures, or tumors, and spine surgery was not involved in. DICOM 3.0 data of multi-slice spiral CT (0.625-1.25 mm), ranging from T1 to T12, were used for three-dimensional reconstruction, measurement and statistical analysis. RESULTS AND CONCLUSION:(1) Joint width overal trends in“V”. Joint surface height from T1 to T12 increased gradual y with the increase of the operation sequence. (2) The joint thickness from T1 to T12 showed a gradual y increasing trend with the increase of the job sequence;articular process under the joint thickness was gentle. In the left and right sides of the upper and lower joints, joint surface width, height, and thickness did not show significant difference in addition to the significant difference between the individual vertebral body. Joints spacing on the side and there was no significant difference between upper and lower, articular process spacing between sides showed an increasing trend with the increase of operation sequence;upper and lower joints spacing increased with the job sequence, and showed wide“U”shape. (3) These results confirmed that the application of three-dimensional reconstruction techniques can display shape and characteristics of each vertebral body clearly and intuitively and improve measurement accuracy. Width and height of facet joints in 10-12-year-old school children were overal smal er than those of adults. The distance between upper and lower facet joints changed a little. Distance between left and right facet joints increased from T1 to T12, which complies with the growth and development of children.
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Objective To study the developmental patterns and aging characteristics of anterior sacral foramina and posterior sacral forami-na in adolescents aging from 12 to 18 years old through CT imaging scanning and three-dimensional reconstruction measurement,and to provide the anatomical basis for the diagnosis and treatment of sacral vertebra diseases.Methods The 30 adolescents without any the problems of nerv-ous system were selected to conduct 64-slice spiral CT in the pelvic cavity.The original data were input into three-dimensional reconstruction software Mimics with the form of DICOM,and the relevant indicators were measured and analyzed.Results There was no significant difference in the height,width and distance of inner edge of anterior sacral foramina and the posterior sacral foramina in different gender and sides (P >0.05).The physical development of human increases gradually with age and there were significant differences.Conclusion There is a regular change process in the relevant indicators of anterior sacral foramina and posterior sacral foramina in adolescents.But the clinical appli-cation must be combined with the results of individual imaging,the technology of reverse engineering and the support of rapid prototype manu-facturing so as to meet the satisfactory results of individualized treatment.
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Objective The correlation analysis was proceeded between youth cervical hook and transverse foramen by using imaging scanning and three-dimensional reconstruction method,which can provide theoretical basis for early diagnosis,treatment and prevention of ju-venile cervical spondylosis.Methods A total of 66 teenagers who had no trauma,neurological symptoms or signs were selected with aged from 6 to 20 years old,who were scanned by multi slice spiral CT,ranged from C1 to T1 .The original data in DICOMformat to import 3D re-construction software was related index measurement and subsequent statistical analysis.Results There was a correlation between hook height,base width,base length of luschca joint and transverse diameter,longitudinal diameter.Conclusion Hook vertebral meridian of lus-chca joint and transverse foramen has a close contact.Factors such as fracture and hyperplasia of luschca joint,vertebral artery of transverseforamen can be oppressed that cause corresponding vertebral artery type of cervical spondylosis.
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Objective To explore the uncinate-transverse hole spacing developmental patterns and aging characteristics by means of studying the teenagers aging from 6~20 years old,and provide the basis for image analysis of the treatment and prevention of cervical spondy-losis. Method the 66 adolescents without trauma nor problems of nervous system were selected to do thin spiral CT scan(0. 625 ~1. 25 mm) ,the range was C1 ~T1 . The original data in the form of DICOM are analyzed according to gender and age. Results There was no sig-nificant difference in gender and different sides. Overall,the physical development of human increases gradually with age and has some signifi-cant differences. Conclusion There exists a close relationship between cervical hook-transverse process and the incidence of vertebral artery type and nerve root type cervical spondylosis.
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BACKGROUND:Many scholars at home and abroad have already attempted to apply the technique of the internal fixation pedicle screw placement to cure children’s spinal injuries in recent years, because the children’s thoracic pedicle is more smal , anatomical structure variation is big and adjacent relationship is complicated, so the application of adult’s pedicle screw technology simply to children who was in a continuous growth and development can increase operation risk greatly. Above this, improving the accuracy of nailing and reducing error rate become keys for further development of cervical pedicle fixation. OBJECTIVE:To provide an individualized and accurate positioning method for screw placement in thoracic pedicle of children by computer aided design and rapid prototyping technology. METHODS:After computed tomography scan of four cases of child specimens, the original data were made for three-dimensional reconstruction by the software, then the specimens were randomly divided into two groups:one group used the traditional pedicle internal fixation method, and the other group, first created the individual navigation template using the principle of reverse engineering and rapid prototyping technology. The lumbar pedicle screws were put into the samples by the individual navigation template. The position of the pedicle screws was evaluated according to the computer tomography scan. RESULTS AND CONCLUSION:The accurate rate of screw placement of the traditional pedicle internal fixation method was 58%;and the accurate rate of screw placement of the individual digital navigation template method was 81%. The success rate was better than the traditional surgery group. Furthermore, chi square test showed that there was a significant difference between two groups (P<0.05). These findings suggested that there has a high accuracy of the screw placement in thoracic pedicle of children assisted by the individual navigation template, ful y reflects the principle of individualization of screw placement, and provides a new feasible method for accurate screw placement in thoracic pedicle of children.
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Objective To study the pedicle of lumbosacral developmental patterns and aging characteristics by means of studying the ado-lescents aging from 12~18 years old,and provide the basis for image and three-dimensional analysis of the treatment of spinal diseases. Meth-ods Select the 30 normal spines of adolescents without any the problems of nervous system,who did thin spiral CT scan of lumbosacral verte-brae. The original data in the form of DICOM were put into three-dimensional software to do the relevant measurement and analyzed according to gender and age. Results There were no significant differences between the pedicle of lumbosacral E/F angle and DSP /DNP and these differ-ences were not influenced by age and gender(P>0. 05). The physical development of human increases gradually with age and has some signifi-cant differences. Conclusion A regular change process and operation in the region value in patients with lumbarsacrum is displayed. But it must be combined with the results of individual imagine and the technology of reverse engineering and the support of rapid prototype manufactur-ing. Only in this way can it meet the satisfaction of individualized treatment.
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Objective To study the developmental patterns and aging characteristics of lumbar pedicle morphology in the adolescents aging from 12~18 years old,and to provide the anatomical basis for image and three-dimensional analysis of the treatment and prevention of spinal diseases. Methods the 30 adolescents with normal spines and without any the problems of nervous system were selected to do thin spiral CT scan that the range was lumbar. The original data imported into three-dimensional reconstruction software with the form of DICOM were to measure and analyze statistically the relevant indicators according to gender and age. Results There was no significant difference in the pedicle height,pedicle width and length of form screw entry point to vertebral anterior cotrex,which were not influenced by age and gender (P>0. 05). The physical development of human increases gradually with age and has some significant differences. Conclusion A regular change process is displayed to provide references for clinic. But it must be combined with the results of individual imaging and the technology of reverse engineering and the support of rapid prototype manufacturing. Only in this way can it meet the satisfaction of individualized treatment.