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Distal margin distance in radical resection of locally advanced rectal cancer after neoadjuvant therapy
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作者 Jun Luo Mingxuan Zhu +6 位作者 Long Zhao Meiwen He Bei Li Yifan Liu Yuhan Sun Guoqing Lyu Zhanlong Shen 《Chinese Journal of Cancer Research》 SCIE CAS CSCD 2024年第2期226-232,共7页
Colorectal cancer has a high incidence and mortality rate in China, with the majority of cases being middle and low rectal cancer. Surgical intervention is currently the main treatment modality for locally advanced re... Colorectal cancer has a high incidence and mortality rate in China, with the majority of cases being middle and low rectal cancer. Surgical intervention is currently the main treatment modality for locally advanced rectal cancer, with the common goal of improving oncological outcomes while preserving function. The controversy regarding the circumferential resection margin distance in rectal cancer surgery has been resolved. With the promotion of neoadjuvant therapy concepts and advancements in technology, treatment strategies have become more diverse.Following tumor downstaging, there is an increasing trend towards extending the safe distance of distal rectal margin. This provides more opportunities for patients with low rectal cancer to preserve their anal function.However, there is currently no consensus on the specific distance of distal resection margin. 展开更多
关键词 Colorectal cancer distal resection margin neoadjuvant therapy
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Knee Osteoarthritis Progression after Distal Femur Closing Wedge Osteotomy
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作者 Ferdinand Nyankoué Mebouinz Khalifa Fall +5 位作者 Kennedy Muluem Justine Raphaela Nyekel Moustapha Niane Alioune Badara Gueye Daniel Handy Eone Charles Valerie Kinkpé 《Open Journal of Orthopedics》 2024年第4期187-199,共13页
Background: Despite the conservative treatment of tibio-femoral osteoarthritis through realignment osteotomies, the rate of total knee replacements following an osteotomy is increasing. The aim of this study was to id... Background: Despite the conservative treatment of tibio-femoral osteoarthritis through realignment osteotomies, the rate of total knee replacements following an osteotomy is increasing. The aim of this study was to identify the factors associated with the progression of knee osteoarthritis after a medial closing-wedge distal femoral osteotomy. Methods: Hospital-based observational study on 20 patients who underwent a medial closing-wedge distal femoral osteotomy evaluating the progression of osteoarthritis using the Kellgren and Laurence classification. The Wilcoxon test was used to compare the variation in the progressive stage of the Kellgren and Laurence classification of knee osteoarthritis preoperatively and at the final follow up. Univariate analysis made it possible to determine the factors associated with progression. The final significance threshold for statistical tests was set at 5% (p Results: Overall, the mean follow-up of 46 months ± 6.6 months, with a mean age of 43 years (range: 27 - 69 years) and a female predominance (M: F = 3/7). The progression of tibiofemoral osteoarthritis following a medial closing-wedge distal femoral osteotomy is associated with valgus or varum malalignment been a moderate valgus (OR 6.2 [1.5 - 42.7] at 95% CI;p-value = 0.02), a correction of the mechanical deviation angle with a valgus alignment (OR 2.7 [0.9 - 8.3] at 95% CI), and loss of correction (OR 3.8 [1.3 - 11.6] at 95% CI;p -value) for the lateral compartment while varus alignment (OR 1.7 [0.9 - 8.3] 95% CI, p-value = 0.05) and with rupture of the lateral cortex (OR 2.8 [1.7 - 11.5] 95% CI, p-value = 0.02) were those of the medial compartment. Conclusion: Distal femur closing wedge osteotomy does not definitively interrupt the progression of valgus knee osteoarthritis. The factors associated with the progression of this pathology are modifiable. Taking them into account when performing this surgical technique could improve the osteotomy survival curve. 展开更多
关键词 KNEE OSTEOARTHRITIS PROGRESSION OSTEOTOMY distal Femur
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Evaluation of Surgical Treatment of Distal Humeral Fractures in Adults
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作者 Abdoulaye Camara Karinka Kéita +7 位作者 Mamady Doukouré Abdoul Karim Baldé Léopold Lamah Fatoumata Camara Alpha Mamadou Felah Diallo Ibrahima Marie Camara Mamadou Madiou Diallo Mamadou Cellou Diallo 《Open Journal of Orthopedics》 2024年第7期287-294,共8页
Introduction: Fractures of the distal end of the humerus are becoming increasingly frequent in young subjects because of the increase in road traffic accidents, and in elderly subjects because of osteoporosis related ... Introduction: Fractures of the distal end of the humerus are becoming increasingly frequent in young subjects because of the increase in road traffic accidents, and in elderly subjects because of osteoporosis related to aging populations. Materials and Methods: It was a prospective, monocentric study from January 2018 to December 2020 involving 14 patients who received and were treated surgically for distal humeral fractures and followed up. Results: We collected 14 patients, including 11 men (78.57%) and 3 women (21.43%), with a sex ratio of 3.7. The mean age was 36.41 years. The circumstances of onset were dominated by road traffic accidents, with 12 cases (85.71%). The dominant side was right-handed, with 11 cases (78.57%). Standard elbow radiography revealed 8 cases of type A fractures (57.14%), 4 cases of type B and 2 cases of type C fractures of the AO. We performed Lecestre plate osteosynthesis in 12 patients and external fixator in 2 others, using the trans-olecranial and transtricipital approaches. Elbow stiffness was the most frequent complication, with 6 cases (42.86%). After six months’ follow-up, our results were excellent and good in 78.57% of cases (MEPS). Conclusion: Surgical treatment with posterior approaches enabled us to achieve restitution of the articular surfaces, solid restraint and early mobilization of the elbow with satisfactory functional results. 展开更多
关键词 FRACTURE distal Humerus Lecestre Plate External Fixator Trans-Olecranial Transtricipital
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Hemiarthroplasty for irreparable distal radius fractures in the elderly:A comprehensive review
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作者 Adriano Cannella Ludovico Caruso +4 位作者 Giulia Maria Sassara Giuseppe Taccardo Marco Passiatore Marina Marescalchi Rocco De Vitis 《World Journal of Orthopedics》 2024年第6期578-584,共7页
BACKGROUND Elderly patients maintaining functional independence can now be candidates for primary wrist hemiarthroplasty to manage acute irreparable distal radius fractures(DRFs).However,further investigation with lon... BACKGROUND Elderly patients maintaining functional independence can now be candidates for primary wrist hemiarthroplasty to manage acute irreparable distal radius fractures(DRFs).However,further investigation with long-term follow-up is required to validate these initial findings.AIM To review the literature on the outcomes of distal radius hemiarthroplasty with available implants to assess its viability as a treatment option.METHODS A comprehensive review of the literature was conducted using electronic databases,including PubMed,Medline,and Scopus.The search terms employed were"distal radius fracture","hemiarthroplasty","wrist arthroplasty",and related terminology.The search was restricted to articles published in English from 1980 until June 2023.Inclusion criteria encompassed cases or case series of DRF treated with hemiarthroplasty,providing clinical or radiographic outcomes,and published in peer-reviewed journals.RESULTS A total of 2508 articles from PubMed and 883 from Scopus were identified initially.Following screening and removal of duplicates,13 articles met the inclusion criteria.These articles,predominantly clinical retrospective studies,provided insights into hemiarthroplasty outcomes,including functional improvements and complications.Hemiarthroplasty was a treatment option for complex DRF,particularly those cases with severe comminution,intraarticular involvement,or severe osteoporosis.Functional outcomes demonstrated improvements in pain relief,wrist mobility,and grip strength,with variability across studies.Complications included implant loosening,infection,nerve injury,and stiffness,with varying incidence rates influenced by surgical techniques and implant choice.Long-term outcomes were inadequately documented,warranting further research.CONCLUSION Hemiarthroplasty is a promising treatment for irreparable DRF in the elderly.Long-term outcomes and complications require further study. 展开更多
关键词 Irreparable distal radius fracture HEMIARTHROPLASTY OSTEOPOROSIS Wrist prosthesis ELDERLY
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Preoperative systemic inflammatory response index as a prognostic marker for distal cholangiocarcinoma after pancreatoduodenectomy
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作者 Wen-Hui Zhang Yu Zhao +3 位作者 Cheng-Run Zhang Jin-Can Huang Shao-Cheng Lyu Ren Lang 《World Journal of Gastrointestinal Surgery》 SCIE 2024年第9期2910-2924,共15页
BACKGROUND The relationship between preoperative inflammation status and tumorigenesis as well as tumor progression is widely acknowledged.AIM To assess the prognostic significance of preoperative inflammatory biomark... BACKGROUND The relationship between preoperative inflammation status and tumorigenesis as well as tumor progression is widely acknowledged.AIM To assess the prognostic significance of preoperative inflammatory biomarkers in patients with distal cholangiocarcinoma(dCCA)who underwent pancreat-oduodenectomy(PD).METHODS This single-center study included 216 patients with dCCA after PD between January 1,2011,and December 31,2022.The individuals were categorized into two sets based on their systemic inflammatory response index(SIRI)levels:A low SIRI group(SIRI<1.5,n=123)and a high SIRI group(SIRI≥1.5,n=93).Inflam-matory biomarkers were evaluated for predictive accuracy using receiver operating characteristic curves.Both univariate and multivariate Cox proportional hazards analyses were performed to estimate SIRI for overall survival(OS)and recurrence-free survival(RFS).RESULTS The study included a total of 216 patients,with 58.3%being male and a mean age of 65.6±9.6 years.123 patients were in the low SIRI group and 93 were in the high SIRI group after PD for dCCA.SIRI had an area under the curve value of 0.674 for diagnosing dCCA,showing better performance than other inflammatory biomarkers.Multivariate analysis indicated that having a SIRI greater than 1.5 independently increased the risk of dCCA following PD,leading to lower OS[hazard ratios(HR)=1.868,P=0.006]and RFS(HR=0.949,P<0.001).Additionally,survival analysis indicated a significantly better prognosis for patients in the low SIRI group(P<0.001).CONCLUSION It is determined that a high SIRI before surgery is a significant risk factor for dCCA after PD. 展开更多
关键词 distal cholangiocarcinoma PANCREATODUODENECTOMY BIOMARKER Systemic inflammatory response index Prognosis
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Treating acute low back pain with acupuncture:A randomized controlled study protocol to compare the effectiveness between distal and local acupoints
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作者 Singleung Chan Shukyan Lam +7 位作者 Sinyin Ho Wanyi Au Poyi Lin Waiming Chan Taking Yu Shungchi Tam Bacon F.L.Ng Linda L.D.Zhong 《Journal of Traditional Chinese Medical Sciences》 CAS 2024年第3期351-356,共6页
Objective:To compare the efficacy of using“distal acupoints only”vs.“local acupoints mainly combined with distal acupoints”in cases of acute low back pain(ALBP).Methods: A total of 102 eligible patients aged 18–6... Objective:To compare the efficacy of using“distal acupoints only”vs.“local acupoints mainly combined with distal acupoints”in cases of acute low back pain(ALBP).Methods: A total of 102 eligible patients aged 18–65 years with ALBP lasting less than 6 weeks will be randomized in a 1:1 ratio to the distal acupoints only group(DPOG)and the local acupoints mainly combined with the distal acupoints group(LPMG).During a 4-week treatment period,patients in the DPOG will receive acupuncture at distal acupoints only(Houxi[SI 3]and Yaotongxue[EX-UE 7])twice a week,while those in the LPMG group will receive acupuncture at local acupoints(mainly Shenshu[BL 23]and Dachangshu[BL 25])combined with distal points(Weizhong[BL 40]).The patients in both groups will be evaluated at every session of treatment,and the follow-up will be performed for 3 months.The primary outcome measure will be the change in ALBP intensity,assessed using visual analogue scale scores before and after treatment.The secondary outcome measure will be the evaluation of functional disability using the Oswestry Disability Index.Discussion: This study compares the DPOG and LPMG to explore the feasibility of the DPOG in the treatment of ALBP. 展开更多
关键词 ACUPUNCTURE Acute low back pain Motion style acupuncture Activating qi acupuncture distal acupoints Local acupoints
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Lung cancer metastasis-induced distal esophageal segmental spasm confirmed by individualized peroral endoscopic myotomy:A case report
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作者 Hong Shi Su-Yu Chen +2 位作者 Zhao-Fei Xie Li-Lin Lin Yan Jiang 《World Journal of Gastrointestinal Surgery》 SCIE 2024年第10期3321-3327,共7页
BACKGROUND Peroral endoscopic myotomy(POEM)has been widely performed as a standard treatment for achalasia;however,its efficacy and safety for treating distal esophageal segmental spasms induced by cancer metastasis r... BACKGROUND Peroral endoscopic myotomy(POEM)has been widely performed as a standard treatment for achalasia;however,its efficacy and safety for treating distal esophageal segmental spasms induced by cancer metastasis remain unknown.CASE SUMMARY A 72-year-old male was referred to our hospital and complained of progressive dysphagia for two years.Endoscopy revealed a 2 cm long segment esophageal stenosis with intact mucosa and normal cardia.Computed tomography showed a right upper lung mass,and pathology of the right pleural effusion confirmed the diagnosis of right upper lung adenocarcinoma with multiple rib and mediastinal lymph node metastases and right malignant pleural effusion.Individualized POEM was performed first to alleviate dysphagia,and the final diagnosis was changed to esophageal muscle metastasis arising from lung adenocarcinoma.After treatment,the patient could eat soft solid food and received multiple rounds of pembrolizumab-combination chemotherapy.The patient’s progression-free survival was approximately 16 months.Long stable disease was obtained during the 24-month follow-up.CONCLUSION The incidence of distal esophageal segmental spasms induced by muscular metastasis arising from lung adenocarcinoma is extremely low.Individualized POEM can effectively improve a patient’s nutritional status before subsequent chemotherapy can be combined with immune checkpoint inhibitors. 展开更多
关键词 Peroral endoscopic myotomy distal esophageal segmental spasm Lung cancer Esophageal metastasis Case report
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Anisotropy of Trabecular Bone from Ultra-Distal Radius Digital X-Ray Imaging: Effects on Bone Mineral Density and Age
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作者 Jian-Feng Chen 《Open Journal of Radiology》 2024年第1期14-23,共10页
Background: When applied to trabecular bone X-ray images, the anisotropic properties of trabeculae located at ultra-distal radius were investigated by using the trabecular bone scores (TBS) calculated along directions... Background: When applied to trabecular bone X-ray images, the anisotropic properties of trabeculae located at ultra-distal radius were investigated by using the trabecular bone scores (TBS) calculated along directions parallel and perpendicular to the forearm. Methodology: Data from more than two hundred subjects were studied retrospectively. A DXA (GE Lunar Prodigy) scan of the forearm was performed on each subject to measure the bone mineral density (BMD) value at the location of ultra-distal radius, and an X-ray digital image of the same forearm was taken on the same day. The values of trabecular bone score along the direction perpendicular to the forearm, TBS<sub>x</sub>, and along the direction parallel to the forearm, TBS<sub>y</sub>, were calculated respectively. The statistics of TBS<sub>x</sub> and TBS<sub>y</sub> were calculated, and the anisotropy of the trabecular bone, which was defined as the ratio of TBS<sub>y</sub> to TBS<sub>x</sub> and changed with subjects’ BMD and age, was reported and analyzed. Results: The results show that the correlation coefficient between TBS<sub>x</sub> and TBS<sub>y</sub> was 0.72 (p BMD and age was reported. The results showed that decreased trabecular bone anisotropy was associated with deceased BMD and increased age in the subject group. Conclusions: This study shows that decreased trabecular bone anisotropy was associated with decreased BMD and increased age. 展开更多
关键词 ANISOTROPY Trabecular Bone Score Bone Mineral Density Ultra-distal Radius Digital X-Ray Image
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上颌组牙三维有限元模型的建立及Carrière Distalizer矫治器的力学分析 被引量:6
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作者 曾琳 胡玲玲 兰泽栋 《北京口腔医学》 CAS 2009年第1期27-30,共4页
目的建立一侧有效的自然排列的上颌尖牙和第一磨牙及周围牙槽骨的三维有限元模型,分析在Carrière Distalizer矫治器作用下,组牙的应力分布及其位移特点。方法通过螺旋CT扫描获得精确的组牙及颌骨DICOM格式的图像信息,采用Mimics三... 目的建立一侧有效的自然排列的上颌尖牙和第一磨牙及周围牙槽骨的三维有限元模型,分析在Carrière Distalizer矫治器作用下,组牙的应力分布及其位移特点。方法通过螺旋CT扫描获得精确的组牙及颌骨DICOM格式的图像信息,采用Mimics三维建模软件和Ansys有限元分析软件建立及拟合上颌骨中正常位置的上颌组牙及其周围牙槽骨的三维有限元模型,模拟Carrière Distalizer矫治器的力学实验并进行相关分析。结果成功建立了上颌组牙及其周围牙槽骨的三维有限元模型。力学实验显示,尖牙和磨牙颈部剖面腭侧应力分布及位移明显小于颊侧、远中和近中,表现为类似旋转移动的柱状图形;而尖牙和磨牙整个远中剖面的应力分布及位移规律基本相同,均表现为自牙颈部向牙根部逐渐衰减的倾斜移动的曲线。结论本实验创建的上颌组牙及其周围牙槽骨的三维有限元模型,达到了几何外形和生物力学的相似性,可用于精确的生物力学分析;尖牙和磨牙在CD的作用下,应力分布及位移规律均呈现有旋转和倾斜移动的趋势。 展开更多
关键词 Carrière distalizer 建模 三维有限元 载荷
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长、短型Ⅱ类牵引对Carrière Distalizer作用的有限元分析 被引量:2
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作者 曾琳 胡飞 +1 位作者 肖珲 兰泽栋 《北京口腔医学》 CAS 2009年第5期249-251,共3页
目的利用有限元分析法,比较Carrière Distalizer矫治器作用下,长、短型Ⅱ类牵引对上颌组牙应力分布及位移的影响。方法构建Carrière Distalizer矫治器作用模式的三维有限元模型,分别以下颌第一或第二磨牙作Ⅱ类牵引的起点,实... 目的利用有限元分析法,比较Carrière Distalizer矫治器作用下,长、短型Ⅱ类牵引对上颌组牙应力分布及位移的影响。方法构建Carrière Distalizer矫治器作用模式的三维有限元模型,分别以下颌第一或第二磨牙作Ⅱ类牵引的起点,实施长、短型牵引。本研究设定加载力值为150克,分析上颌尖牙和磨牙应力分布及位移的差异。结果两个位置的牵引效果总体趋势相同。尖牙的旋转移动和倾斜移动趋势强于磨牙,两个牵引起点的作用差异不显著。结论在做Ⅱ类弹性牵引时,无论长牵引还是短牵引,都不会过多的影响牵引效果。 展开更多
关键词 Carrière distalizer 有限元分析 Ⅱ类牵引
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Carriere Distalizer矫治器牵引力加载高度对尖磨牙的影响 被引量:3
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作者 曾琳 武月霞 《现代医院》 2013年第12期31-33,共3页
目的利用有限元分析法,比较Carriere Distalizer矫治器作用时,加载于尖牙不同高度的牵引力对上颌组牙应力分布及位移的影响。方法构建Carriere Distalizer矫治器作用模式的三维有限元模型,分别以6个不同牵引高度加载,加载力值均为150 g... 目的利用有限元分析法,比较Carriere Distalizer矫治器作用时,加载于尖牙不同高度的牵引力对上颌组牙应力分布及位移的影响。方法构建Carriere Distalizer矫治器作用模式的三维有限元模型,分别以6个不同牵引高度加载,加载力值均为150 g,分析上颌尖牙和磨牙应力分布及位移的差异。结果六个载荷点下无论尖牙还是磨牙,其应力和位移变化几近相同,应力及位移曲线表现为完美的重叠线;不同尖牙牵引钩高度,对尖牙牙颈部应力的影响主要表现在远中侧和颊侧,对磨牙牙颈部的影响主要表现在近中侧和颊侧。二者对腭侧的影响均为最小。结论 CD牵引钩高度的变化对尖牙应力及位移影响趋势和强度趋同;对磨牙的影响趋势一致,但强度不同,呈递进态势。 展开更多
关键词 Carriere distalizer加载高度 应力 位移
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Distal Jet远移上颌第一磨牙对第二磨牙萌出的影响 被引量:10
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作者 白宇明 段银钟 +1 位作者 李东 郭军 《第四军医大学学报》 北大核心 2005年第3期242-244,共3页
目的:观察改良钟摆矫治器(DistalJet)在远移磨牙 的过程中对于第二磨牙萌出的影响,为临床更好地应用该矫 治器提供参考和依据.方法:临床选取磨牙Ⅱ类关系病例28 (男12,女16)例,平均年龄11.4岁,DistalJet组13(男6,女 7)例,平均年龄10.7岁... 目的:观察改良钟摆矫治器(DistalJet)在远移磨牙 的过程中对于第二磨牙萌出的影响,为临床更好地应用该矫 治器提供参考和依据.方法:临床选取磨牙Ⅱ类关系病例28 (男12,女16)例,平均年龄11.4岁,DistalJet组13(男6,女 7)例,平均年龄10.7岁.选用治疗前后模型及头影侧位片,测 量关于第一及第二磨牙位置的9项线角指标,并于常规非拔 牙矫治组15(男6,女9)例,平均年龄11.9岁,进行两均数t 检验.结果:9项线角指标两组检验均有显著性差异(P< 0.01).第二磨牙萌出过程中发生明显颊向移位.第一磨牙颊 尖与第二磨牙颊尖连线夹角(R)增大(4.2°±0.6°,P< 0.01),同时第一磨牙长轴与SN平面夹角(m2 SN)(°)(治疗 前54.3±3.7,治疗后48.0±3.5),第二磨牙牙体中心与Ptv 距(m2 Ptv)(mm)(治疗前12.8±1.6,治疗后9.7±1.4)差异 显著(P<0.01).结论:第二磨牙未萌出时推第一磨牙远移 可发生第二磨牙的远中颊向的旋转移位,第二磨牙牙体长轴 随第一磨牙而朝远中倾斜. 展开更多
关键词 改良钟摆矫治器 牙萌出 磨牙
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Distal-Jet矫治器远中移动上颌磨牙的疗效 被引量:3
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作者 李琳 张苗苗 +1 位作者 王秀芳 邵玶 《实用口腔医学杂志》 CAS CSCD 北大核心 2006年第3期365-369,共5页
目的:评价Distal-Jet矫治器远中移动上颌磨牙的疗效。方法:应用Distal-Jet矫治器对12例平均年龄为12.3岁,由于上颌磨牙前移所致的安氏Ⅱ类错患者进行治疗,通过远中移动磨牙前后的头影测量分析和模型测量分析评价其远中移动磨牙的疗效... 目的:评价Distal-Jet矫治器远中移动上颌磨牙的疗效。方法:应用Distal-Jet矫治器对12例平均年龄为12.3岁,由于上颌磨牙前移所致的安氏Ⅱ类错患者进行治疗,通过远中移动磨牙前后的头影测量分析和模型测量分析评价其远中移动磨牙的疗效。结果:①磨牙平均向远中移动(3.6±0.75)mm,牙冠远中倾斜(3.5±3)°;②第一前磨牙近中移动(2.1±1.7)mm,牙冠近中倾斜(3.1±2.57)°,前牙覆盖增加(1.47±1.76)mm;③磨牙和第一前磨牙分别伸长(0.39±0.46)mm和(0.43±0.61)mm;④双侧上颌第一磨牙中央窝间宽度增加(2.8±1.1)mm。结论:Distal-Jet矫治器能有效地整体远中移动上颌磨牙,但也会引起少量前磨牙的近中移动及牙冠近中倾斜。 展开更多
关键词 distal-Jet矫治器 安氏Ⅱ类错[牙合] 磨牙远中移动
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区间和圆周上的distal自映射 被引量:1
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作者 赵俊玲 《数学杂志》 CSCD 北大核心 2006年第1期58-62,共5页
本文研究distal连续自映射,给出了区间和圆周上distal连续自映射的刻画,并证明了对于连续自映射,等度连续性不能蕴涵distal性.
关键词 distal 等度连续 映射度
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支架外固定与钢板内固定治疗桡骨远端粉碎性骨折的Meta分析
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作者 林晴 刘峘 +3 位作者 成永忠 姜俊杰 李永耀 李光耀 《中国组织工程研究》 CAS 北大核心 2025年第21期4602-4611,共10页
目的:外固定支架和钢板内固定作为桡骨远端粉碎性骨折的常用治疗方法,在临床上各有利弊。系统评价外固定支架与钢板内固定治疗粉碎性桡骨远端骨折的临床疗效及安全性,为桡骨远端骨折中西医结合诊疗指南研制提供论证依据。方法:系统检索P... 目的:外固定支架和钢板内固定作为桡骨远端粉碎性骨折的常用治疗方法,在临床上各有利弊。系统评价外固定支架与钢板内固定治疗粉碎性桡骨远端骨折的临床疗效及安全性,为桡骨远端骨折中西医结合诊疗指南研制提供论证依据。方法:系统检索PubMed、Web of Science、Embase、Cochrane Library、中国知网、中国生物医学文献数据库、维普和万方数据库,纳入2013年10月至2023年10月发表的关于外固定支架和钢板内固定治疗粉碎性桡骨远端骨折的随机对照试验文献,按照纳入标准和排除标准筛选文献,使用Review Manager进行文献质量评价和Meta分析。结果:(1)纳入8篇文献,其中中文文献4篇,英文文献4篇、总样本量648例,外固定支架组328例,钢板内固定组320例;(2)术后3个月,钢板内固定组的背伸、掌屈、旋后范围优于外固定支架组;术后12个月,钢板内固定组的握力、掌倾角、掌屈、旋前和旋后范围优于外固定支架组;钢板内固定组在术后感染方面优于外固定支架组,其余结局指标两组差异均无显著性意义。结论:现有8项证据表明,在粉碎性桡骨远端骨折的治疗方式选择上,外固定支架与切开钢板内固定都有良好的治疗效果,综合其他因素钢板内固定更胜一筹,但是对于一些高度严重的粉碎性桡骨远端骨折、骨质较差、严重污染的开放性骨折以及软组织肿胀而无法进行切开手术的特殊患者,外固定支架才是首选。此次研究结果具有局限性,未来还需要开展更多高质量、大样本、多中心的随机对照试验研究,另外需重视远期疗效、其他次要指标的观察,补充优化当前研究结果。 展开更多
关键词 粉碎性桡骨远端骨折 外固定支架 内固定 临床疗效 安全性 荟萃分析
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改良Distal-Jet矫治器推上颌磨牙向远中的应用 被引量:3
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作者 张苗苗 孙婷婷 刘莉 《华西口腔医学杂志》 CAS CSCD 北大核心 2007年第2期132-134,共3页
目的探讨改良Distal-Jet矫治器远中移动上颌磨牙的临床疗效。方法对15例上颌磨牙近中移动所致的错畸形患者采用改良Distal-Jet矫治器推上颌磨牙向远中,并结合固定矫治器对错畸形进行矫治。结果应用改良Distal-Jet矫治器推上颌磨牙... 目的探讨改良Distal-Jet矫治器远中移动上颌磨牙的临床疗效。方法对15例上颌磨牙近中移动所致的错畸形患者采用改良Distal-Jet矫治器推上颌磨牙向远中,并结合固定矫治器对错畸形进行矫治。结果应用改良Distal-Jet矫治器推上颌磨牙向远中取得了较好的效果,磨牙为中性关系,前牙覆覆盖正常。结论改良Distal-Jet矫治器能有效地远中移动上颌磨牙。 展开更多
关键词 改良distal-Jet矫治器 上颌磨牙 远中移动
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Distal Jet矫治器在远中移动磨牙中的应用 被引量:1
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作者 吕涛 白丁 《国外医学(口腔医学分册)》 CAS 2004年第1期61-63,共3页
Distal Jet矫治器可矫治安氏Ⅱ类牙性错(牙合)或上牙弓轻、中度拥挤,并可竖直下颌磨牙。本文对Distal Jet矫治器的不同设计、制作、应用及治疗效果进行了综述,使临床医生对该矫治器有更全面的了解,从而有效地推上颌磨牙向远中,矫治Ⅱ类... Distal Jet矫治器可矫治安氏Ⅱ类牙性错(牙合)或上牙弓轻、中度拥挤,并可竖直下颌磨牙。本文对Distal Jet矫治器的不同设计、制作、应用及治疗效果进行了综述,使临床医生对该矫治器有更全面的了解,从而有效地推上颌磨牙向远中,矫治Ⅱ类错(牙合)。 展开更多
关键词 distal Jet矫治器 磨牙移动 安氏Ⅱ类牙性错He 推上颌磨牙向远中法
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三种内固定方式治疗AO/OTA A3型股骨远端骨折的有限元分析
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作者 张金辉 刘晖 +3 位作者 徐维臻 熊远飞 张剑平 吴进 《中国组织工程研究》 CAS 北大核心 2025年第27期5728-5734,共7页
背景:股骨远端骨折的患者年龄呈双峰分布,多见于高能量损伤的青壮年和低能量损伤的老年人。对于复杂的股骨远端骨折,单一的股骨远端外侧微创内固定系统或股骨逆行髓内钉的固定方式可能无法实现骨折愈合的稳定环境,因此常常需要联合固定... 背景:股骨远端骨折的患者年龄呈双峰分布,多见于高能量损伤的青壮年和低能量损伤的老年人。对于复杂的股骨远端骨折,单一的股骨远端外侧微创内固定系统或股骨逆行髓内钉的固定方式可能无法实现骨折愈合的稳定环境,因此常常需要联合固定。目的:设计了一款针对股骨远端A3型骨折的新型联合内固定方式(微创内固定系统+胫骨逆行髓内钉),使用有限元方法与2种常用联合固定方式——双钢板(微创内固定系统+锁定加压钢板)和钉板联合(微创内固定系统+股骨逆行髓内钉)固定的生物力学性能进行对比分析,为股骨远端型骨折临床内固定的选择提供理论依据。方法:选择一名23岁健康男性志愿者的股骨CT图像,基于Mimics与Geomagic Studio软件重建股骨三维模型,并与其他文献所做体外有限元分析数据比较,验证此次制作股骨三维模型的有效性。使用Creo 5.0软件建立股骨远端A3型骨折模型与内固定三维模型,对股骨骨折模型与3种联合内固定方式(微创内固定系统+胫骨逆行髓内钉、微创内固定系统+锁定加压钢板、微创内固定系统+股骨逆行髓内钉)进行装配并行布尔运算,建立3组有限元模型。随后导入Abaqus有限元分析软件中赋予材料属性,施加相同的边界条件与3种载荷(正常站立、缓慢行走、下楼梯)提交计算,分析3组模型受力后内固定应力分布、股骨整体与局部变形情况,评估新型联合内固定方式(微创内固定系统+胫骨逆行髓内钉)的失效风险与抗变形能力。结果与结论:①微创内固定系统+胫骨逆行髓内钉抗变形能力虽然低于微创内固定系统+锁定加压钢板10%左右,但与微创内固定系统+股骨逆行髓内钉相当,具备良好的抗变形能力;②3种联合内固定方式的股骨刚度基本不随步态发生变化;随着载荷的增加,股骨位移量基本呈线性增加,稳定性较高;③微创内固定系统+胫骨逆行髓内钉内固定的失效风险低于其他两种方案,相比微创内固定系统+锁定加压钢板失效风险降低2.94%;④新型联合固定方式在抗变形能力与安全有效性方面均具备一定的优势,为进一步的临床推广应用奠定了理论基础。 展开更多
关键词 股骨远端骨折 双钢板 股骨逆行髓内钉 胫骨逆行髓内钉 有限元分析 生物力学
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Distal流的有关性质
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作者 李红 《河北师范大学学报(自然科学版)》 CAS 2001年第3期309-311,共3页
研究了紧度量空间上distal流的有关性质,得出以下结论:1) 紧度量空间上的同胚是distal同胚当且仅当它的扭扩流是distal流;2) Distal流经提升或投射后仍是distal流.
关键词 distal 扭扩流 提升 投射 紧度量空间 distal同胚 拓扑动力系统
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华沙圈上连续映射的distality与等度连续性
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作者 牛应轩 《大学数学》 2010年第5期86-89,共4页
设W为华沙圈,f:W→W为连续映射.本文得到了f为distal的一个刻画并且讨论了f的distality与等度连续性的关系.证明了:(i)f是distal的当且仅当f为恒等映射.(ii)如果f为满射,则f是distal的当且仅当f为等度连续的.
关键词 华沙圈 不动点集 distal 等度连续
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