摘要：为加快临床应用,进行快速成型个性化桩核的CAD/CAM设计制作和探讨。该文研究工作由计算机建模、实体加工、力学性能检测3部分构成。首先,使用三维激光扫描仪对前牙残根残冠的桩核蜡型进行数据采集,获取三维点云数据,并利用法国Dassault公司CATIA软件系统对三维扫描数据进行处理,编写三维桩核形态设计模块,进行桩核的建模。然后,将完成的CAD数据储存为STL格式文件,该格式亦为快速成型设备接口的通用数据格式。用选定的树脂材料根据设计完成的桩核数据快速成型,分别加工生成试体A与试体B(带孔的)个性化树脂桩核,将金属加固丝粘结于实体B的个性化桩核之中以增加强度。最后,测试、对比这两种个性化桩核的力学性能,获取相关数据。测试结果表明:两种试体均具有满足临床使用要求的力学性能。研究表明:CAD快速成型技术制作个性化桩核具有可行性,将为桩核CAM的完善提供空间。

摘要：目的 :利用知识库开发一套实用的全口义齿计算机辅助设计 /制作 (CAD/CAM)系统。方法 :由三维座标测量机 ( 3DCMM)获取无牙颌、托等模型的三维信息 ,运用B样条方法建立全口义齿的数学模型。共设置 8个功能模块 :测量模块、数据转换模块、曲面造型模块、基托生成及编辑模块、排牙方案及编辑模块、结果输出模块、动态模拟模块和管理模块。结果 :建立由 3DCMM ,8个功能模块和数据库组成的全口义齿计算机辅助设计软硬件系统。完成全口义齿计算机辅助设计及三维显示。结论 :本系统的建立为全口义齿CAD/CAM系统的开发奠定了基础。

摘要：小女孩塔比莎的一颗牙齿松了,爸爸告诉她:“如果你把掉下来的牙齿放在枕头底下,牙齿小精灵就会把它收走,还会给你留一点钱。”于是,塔比莎恨不得这颗牙齿马上就掉下来!为了让这颗牙齿尽快脱落,塔比莎想尽一切办法,可是她的牙齿就是不掉。塔比莎想了哪些办法呢?这颗超级顽固的牙齿最后是怎么脱落的呢?让我们一起去故事里看看吧!

摘要：In this study,boron-doped hydroxyapatite(BHT)-loaded alginate/gelatin-based(A/G)hydrogel coating on Ti was fabricated to support bone integration through triggering osteoinduction,vascularization and ***,highly reproducible,cheap and time-effective BHT was produced,which significantly promoted higher osteogenic and angiogenic maturation,while a mild innate immune response was *** immense potential of BHT was evidenced by the production of a gap-filling A/G/BHT interphase on Ti implants to mimic the osseous extracellular matrix to achieve functional bridging and exert control over the course of innate immune *** initially aminosilanized the implant surface using 3-aminopropyl triethoxysilane,and then coated it with 0.25%w/v alginate with 20 mM 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide and N-hydroxysuccinimide to allowthe A/G/BHT pre-gel to disperse evenly and covalently attach on the *** pre-gel was added with 0.2 M NaCl to homogeneously blend BHT in the structure without inducing ionic ***,the coated implants were freeze-dried and *** coated layer demonstrated high cohesive and adhesive strength,and 8-month-long shelf-life at room temperature and normal *** A/G/BHT was able to coat an irregularly shaped Ti *** and endothelial cells thrived on the A/G/BHT,and it demonstrated greatly improved osteogenic and angiogenic ***,A/G/BHT maintained macrophage viability and generated an acute increase in immune response that could be resolved ***,A/G/BHT was shown to induce the robust integration of implant in a rabbit femur osteochondral model within ***,we concluded that A/G/BHT coatings could serve as amultifunctional reservoir,promoting the strong and rapid osseointegration of metallic implants.

摘要：目的探讨单侧游离缺失种植修复后人造冠颊舌径减径设计对[牙合]力分布与咀嚼效能的影响。方法选择单侧游离缺失种植修复患者12例，人造冠颊舌径采用标准径、减径1／4和减径1／3设计，应用T-ScanII咬合仪和722光栅分光光度计测量患者[牙合]力比率、验力X轴与Y轴位移及咀嚼效率。结果减径1／3组猞力比率（16．25％）比标准径组（27．38％）、减径1／4组（22．60％）明显降低（P〈0．0083）。减径1／4组袷力比率比标准径组显著降低（P〈0．0083）。减径1／3组[牙合]力中心X轴位移（2．0mm）与标准径组（1．5mm）差异有统计学意义（P=0．004），即减径1／3组[牙合]力中心比标准径组明显向种植修复对侧移位。减径1／3组咀嚼效能吸光度A值（0．217）比标准径组（0．345）、减径1／4组（0．289）显著降低（P=0．005和0．004）。结论基于本项研究条件，建议单侧游离缺失种植修复时人造冠采用减径1／4设计，既可保证一定的咀嚼功能，又能适当降低[牙合]力。

摘要：Recurrent oral ulcer is a painful oral mucosal disorder that affects 20%of the world’s *** lack of a radical cure due to its unknown underlying cause calls for innovative symptomatic *** work reports a hyaluronic acid-based dissolvablemicroneedle patch(ROUMNpatch,short for recurrent oral ulcer microneedle)loaded with dexamethasone acetate,vitamin C and tetracaine hydrochloride for the treatment of recurrent oral *** ROUMN patch shows enhancement in both the anti-inflammatory effect elicited by dexamethasone and the pro-proliferation effect of vitamin *** vitro experiments show that ROUMN has a higher efficiency in suppressing lipopolysaccharide(LPS)-induced interleukin-6(IL-6)expression than dexamethasone *** proliferation and migrationwere also significantly promoted byROUMNcompared to vitamin C *** healing-promoting effect of ROUMN was also verified in vivo using an acetic acid-cauterized oral ulcer model in *** as a treatment accelerated the healing process of oral ulcers,shortening the total healing time to 5 days compared with the 7 days required by treatment using watermelon frost,a commonly used over-the-counter(OTC)drug for oral *** rapid dissolution of the hyaluronic acid-based microneedles and the superior healing-promoting effect of the drug combination could lead to a broad application prospect of the ROUMN patch in the treatment of recurrent oral ulcers.

摘要：本文对口腔门诊前牙美容治疗中常见的几种患病群体进行了分型分析,对不同要求的患病群体应采用的不同接诊方式进行了讨论,并对口腔科医生应具备的接诊艺术进行探讨.

摘要：目的　研究牙制备体形态对计算机辅助设计与辅助制作 (computeraideddesign computeraidedmanufacture ,CAD CAM )全瓷底层冠适合性的影响。方法　将牙制备体设计成不同的向聚合度和边缘形态 ,采用MC切削陶瓷经Cerec2CAD CAM系统加工制作成全瓷底层冠 ,粘结于制备体上。采用体视显微镜测试全瓷底层冠边缘、肩台、轴面和面的适合性。结果　当向聚合度为 2 0°时 ,全瓷底层冠的适合性最好 (10 1 7～ 12 7 9) μm ;边缘形态对底层冠边缘和肩台的适合性有影响 (P <0 0 5 ) ,凹面型者适合性较好。当牙制备体设计为 2 0°聚合度、边缘形态为凹面型时 ,全瓷底层冠的边缘适合性为 (40 1± 11 8) μm。 结论　临床制作CAD CAM全瓷底层冠时 ,建议牙制备体设计成 2

摘要：颌面部缺损整复在大多数情况下首选用邻近组织整复的方法。本文讨论如何更有效地利用缺损邻近的皮肤(粘膜)的储备。局部组织瓣成形术主要是通过手术设计充分利用这种组织储备。在这些成形术中,关于对偶三角瓣、菱形组织瓣(Лимберг瓣)

摘要：目的探讨不同修复方式对上颌乳前牙大面积缺损的修复效果。方法采用前瞻性研究,选取2021年9月至2023年6月在杨凌示范区医院进行上颌乳前牙修复的90例患儿作为研究对象,根据修复方法分为A组、B组、C组,每组各30例。A组男17例、女13例,年龄(3.76±0.78)岁,采用树脂直接充填修复方法;B组男15例、女15例,年龄(3.21±0.89)岁,采用纤维桩结合透明冠树脂修复方法;C组男19例、女11例,年龄(3.58±0.67)岁,采用纤维桩计算机辅助设计与制造(CAD/CAM)树脂冠修复方法。对比3组患儿治疗前后牙周指标[牙菌斑指数(PLI)、出血指数(BI)]、修复成功率、抗折裂强度指数、龈沟液炎症因子[肿瘤坏死因子-α(TNF-α)、白细胞介素-8(IL-8)]水平。组间比较采用ANOVA单因素分析及χ^(2)检验。结果修复前,3组患儿牙周指标、抗折裂强度指数、炎症因子水平比较,差异均无统计学意义(均P>0.05)。修复后,C组患儿PLI、BI及TNF-α、IL-8水平[(0.40±0.25)分、(0.67±0.35)分、(613.18±48.18)ng/L、(525.08±29.97)ng/L]均低于A组[(0.87±0.31)分、(1.10±0.50)分、(702.49±62.08)ng/L、(578.37±30.48)ng/L]、B组[(0.73±0.38)分、(0.70±0.45)分、(650.76±59.13)ng/L、(552.41±35.15)ng/L],差异均有统计学意义(F=17.297、9.021、18.711、20.867,均P<0.05);C组患儿抗折裂强度指数为(0.61±0.08)kN,高于A组[(0.50±0.09)kN]、B组[(0.51±0.01)kN],差异有统计学意义(F=22.808,P<0.05)。C组患儿修复成功率为96.23%(102/106),高于A组[74.79%(89/119)]、B组[84.69%(83/98)],差异有统计学意义(χ^(2)=20.021,P<0.001)。结论在上颌乳前牙大面积缺损修复治疗中,采用纤维桩CAD/CAM树脂冠修复方法可以提高修复成功率,改善牙周健康,增加修复结构的抗折裂强度,减少炎症因子水平。