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钛及钛合金具有良好的机械强度和生物相容性,是骨科植入物和牙种植体的首选材料.通过对钛进行表面生物改性,可显著增强其与宿主骨的整合能力.但钛存在弹性模量高及易生理腐蚀等弱点,影响了其临床成功率.多孔钽克服了以上不足,以其优异的力学性能和生物相容性,引起了研究者们的广泛关注,为骨植入材料提供了新的发展方向.目前,多孔钽植入材料已广泛应用于骨科领域,取得了令人满意的临床效果.近年来,多孔钽牙种植体的研究也越来越受到重视,展现了良好的应用前景.本文将对多孔钽骨植入材料的研究进展作一综述. 相似文献
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目的 分析3D打印技术制备β-磷酸三钙(β-TCP)仿生骨支架的形态结构特点及其成骨性能。方法 随机选取24只新西兰兔,建立股骨髁部缺损模型。采用3D打印技术制备β-TCP仿生骨支架,将实验兔随机分为2组,每组12只。其中对照组未植入任何材料;实验组植入β-TCP仿生骨支架,观察4周、8周和12周后的两组骨修复结果,评价其成骨性能。结果 实验组术后第4周、8周、12周时的骨组织学评分均高于对照组,骨小梁厚度、数目、骨小梁体积/总体积均高于对照组(P<0.05)。3D打印的仿生骨支架的直径、高度、孔隙率以及抗压强度、弹性模量与天然松质骨之间的差异无统计学意义(P>0.05)。结论 3D打印技术制备的β-TCP仿生骨支架,可促进骨缺损的修复,支架形态学结构及成骨性能与松质骨相近。 相似文献
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金属3D打印技术的出现为口腔钛种植体的制造提供了新的工艺选择。良好的机械性能是种植体正常行使功能的基础,也是临床医生选择种植体时考虑的重要因素。考虑到金属显微组织结构与其性能之间的重要联系,本文简要阐述了钛合金的显微组织特征,从拉伸性能、抗疲劳性能和硬度等力学指标介绍3D打印钛种植体力学性能的研究进展。 相似文献
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补锌对种植体骨整合率影响的实验研究 总被引:6,自引:0,他引:6
目的:探讨微量元素锌对种植体骨整合率的作用。方法:应用家兔钛种植体动物模型,测定补锌对种植体骨整合率的影响,在家兔双侧胫骨近心端各植入1枚钛种植体后,动物随机分为补锌组和对照组,补锌组动物肌注10g/L硫酸锌,4mg/kg,1次/d。对照组则肌注等量的生理盐水,1次/d。分别于术后1、2、4、8、12周处死动物,测定种植体骨整合率,种植区骨锌含量,血清Cu/Zn值等指标,结果:补锌能够使种植区骨锌的含量在术后1-4周显著增高,从而促进种植损伤区骨的形成和钙化,提高种植体的骨整合率,结论:种植体术后早期(1-2周)适量的补锌能够提高种植体骨整合的速度和质量,且对机体代谢无明显影响,是安全的。 相似文献
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目的 在体外树脂模型上设计并模拟种植体植入实验,分析比较一种新型铝合金材质种植导板与传统树脂导板的准确度差异。方法 选取一名肯氏III类牙列缺损患者并制取硅橡胶印模,灌制超硬石膏模型后使用口内扫描仪扫描,设计并打印20个树脂模型。将患者的锥束计算机断层扫描(CBCT)数据导入软件(3Shape Implant Studio 2019)并规划该患者的种植方案,设计种植导板。使用3D打印机分别制作树脂与铝合金材质手术导板各一个。通过全程引导手术将种植体植入模型中,植入后拍摄术后CBCT。在软件中测量术后CBCT图像与原治疗计划图像,在近远中面和唇腭面分析种植体相对于原设计在三维线性以及角度上的准确度差异。结果 种植体在金属导板引导下的线性偏差分别为近中(0.51±0.63)mm,远中(0.49±0.58) mm,唇向(1.14±1.40) mm,腭向(1.15±1.42) mm;垂直向(2.09±0.84) mm。近远中角度和唇腭侧角度的角度偏差分别为(1.41°±0.81°)和(1.78°±1.03°)。种植体在垂直向的偏差与近远中角度、唇腭侧角度偏差与树脂导板引导下的种植体偏差有统计学... 相似文献
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目的 比较3D打印种植导板引导前牙牙种植在不同术式下的精度。方法 选择21例(32个牙位)牙缺失患者,制作仿真翻瓣与不翻瓣颌骨模型,分为翻瓣组(FP组)与不翻瓣组(FPS组),分别设计制作牙种植导板,比较两组牙种植体实际位置与术前规划在顶端、底端、垂直向距离的偏差值和角度偏差值。采用SPSS 19.0软件对数据进行统计学分析。结果 FPS组与FP组种植体顶端、底端、垂直向距离偏差值和角度偏差值的差异均有统计学意义(P<0.05);与FPS组相比,FP组偏差值更小,精度更高。结论 3D打印种植导板可提高牙种植的精确性,翻瓣与不翻瓣的不同术式对牙种植精度有一定的影响,临床医生可根据实际情况合理选择术式。 相似文献
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目的 比较3D打印种植导板引导前牙牙种植在不同术式下的精度。方法 选择21例(32个牙位)牙缺失患者,制作仿真翻瓣与不翻瓣颌骨模型,分为翻瓣组(FP组)与不翻瓣组(FPS组),分别设计制作牙种植导板,比较两组牙种植体实际位置与术前规划在顶端、底端、垂直向距离的偏差值和角度偏差值。采用SPSS 19.0软件对数据进行统计学分析。结果 FPS组与FP组种植体顶端、底端、垂直向距离偏差值和角度偏差值的差异均有统计学意义(P<0.05);与FPS组相比,FP组偏差值更小,精度更高。结论 3D打印种植导板可提高牙种植的精确性,翻瓣与不翻瓣的不同术式对牙种植精度有一定的影响,临床医生可根据实际情况合理选择术式。 相似文献
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Tobias Graf Jan-Frederik Güth Christian Diegritz Anja Liebermann Josef Schweiger Oliver Schubert 《The journal of advanced prosthodontics》2021,13(6):351
PURPOSEThe aim of this study was to evaluate the efficiency of occlusal and interproximal adjustments of single implant crowns (SIC), comparing a digital cast-free approach (CF) and a protocol using 3D printed casts (PC).MATERIALS AND METHODSA titanium implant was inserted at position of lower right first molar in a typodont. The implant position was scanned using an intraoral scanner and SICs were fabricated accordingly. Ten crowns (CF; n = 10) were subject to a digital cast-free workflow without any labside occlusal and interproximal modifications. Ten other identical crowns (PC) were adjusted to 3D printed casts before delivery. All crowns were then adapted to the testing model, simulating chair-side adjustments during clinical placement. Adjustment time, quantity of adjustments, and contact relationship were assessed. Data were analyzed using SPSS software (P < .05).RESULTSMedian and interquartile range (IQR) of clinical adjustment time was 02:44 (IQR 00:45) minutes in group CF and 01:46 (IQR 00:21) minutes in group PC. Laboratory and clinical adjustment time in group PC was 04:25 (IQR 00:59) minutes in total. Mean and standard deviation (±SD) of root mean squared error (RMSE) of quantity of clinical adjustments was 45 ± 7 µm in group CF and 34 ± 6 µm in group PC. RMSE of total adjustments was 61 ± 11 µm in group PC. Quality of occlusal contacts was better in group CF.CONCLUSIONTime effort for clinical adjustments was higher in the cast-free protocol, whereas quantity of modifications was lower, and the occlusal contact relationship was found more favourable. 相似文献
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目的:评价3D打印导板在上前牙种植的精确度,探讨其临床效果。方法:选取2017年6月—2018年6月在青岛大学附属医院口腔种植科行上前牙区种植手术的60例患者,采用随机数字表法随机分为G组(导板组)和R组(常规组),每组30例,均在术前拍摄锥形束CT(CBCT),应用“Dentiq Guide种植导板软件”进行设计。G组制作3D打印导板辅助种植手术,R组行常规种植手术。术后即刻拍摄CBCT,应用“Dentiq Guide种植导板软件”将术前、术后CT重叠,测量术前设计与种植体实际位置差异,采用SPSS 24.0软件包对所得数据进行统计分析。结果:G组共植入46颗种植体,测量偏差角度(2.34±1.03)°,顶部(0.63±0.38)mm,根尖部(0.71±0.38)mm,深度(0.41±0.40)mm;R组共植入43颗种植体,测量偏差角度(6.72±3.65)°,顶部(1.59±0.35)mm,根尖部(2.05±0.92)mm,深度(0.77±0.63)mm。2组在角度、顶部、根尖部、深度的差异均有统计学意义(P<0.05)。结论:应用3D打印导板辅助上前牙种植手术,可提高手术精确度,满足种植修复需要,践行以修复为导向的精确种植理念。 相似文献
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Influence of the implant diameter and bone quality on the primary stability of porous tantalum trabecular metal dental implants: an in vitro biomechanical study
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Georgios E. Romanos Rafael Arcesio Delgado‐Ruiz Danielle Sacks Josè Luis Calvo‐Guirado 《Clinical oral implants research》2018,29(6):649-655
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《Dental materials》2019,35(12):1805-1812
ObjectiveThe aim of this study was to investigate the three-body wear of different additively manufactured temporary materials, one temporary PMMA material for CAD/CAM milling and one resin-based composite for direct restorations as a control group by using an ACTA machine.MethodsSpecimens (n = 8) of the 3D printing materials 3Delta temp, NextDent C&B, Freeprint temp were additively manufactured by DLP 3D printer. Postprocessing was carried out according to the manufacturer's specifications. Telio CAD were cut out of blocks, Tetric EvoCeram was applied directly and light cured. Three-body wear was simulated with an ACTA machine. Data were statistically analysed (ANOVA, post hoc test: Tukey, p < 0.05). The worn surfaces of the specimens were examined with a FE-SEM.ResultsThe average mean wear was 50 ± 15 μm for Tetric EvoCeram < 62 ± 4 μm for 3Delta temp < 236 ± 31 μm for Telio CAD < 255 ± 13 μm for NextDent C&B < 257 ± 24 μm for Freeprint temp. After 200,000 cycles, the wear and wear rates for Tetric EvoCeram and 3Delta temp were significantly lower than those for the other materials. SEM revealed that 3Delta temp has a higher filler proportion than the other 3D printing materials but less than Tetric EvoCeram.SignificanceThe filler content influences the wear behaviour of additively manufactured materials as well as dental restorative composite materials. While most 3D printing materials have a low inorganic filler load, which qualifies the materials for temporary use only, one 3D printing material has an optimized composition that would qualify the material for longer clinical service time if wear is considered as the outcome variable. 相似文献
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3D打印及其相应计算机辅助医疗模拟技术能根据患者需要,快速制备适合不同患者个性化要求的生物医用材料,并能对材料的微观结构进行精确控制,以精确修复病变组织或器官,并可通过相应的计算机软件辅助进行口腔颌面外科手术模拟操作等,改进治疗方法,提高医疗质量。因此,这种新兴技术在生物医学领域中的应用,尤其在生物医用材料开发、生物组织工程技术中的应用具有独特的优势。本文通过查阅近年来3D打印技术在口腔颌面修复领域中的相关文献,以综述3D打印技术在该领域的应用动态及其进展。 相似文献