共查询到16条相似文献，搜索用时 109 毫秒
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目的：研究不同的义齿设计与末端游离缺牙的牙槽骨吸收的关系．方法：选择末端游离缺牙的患者76例,其中采用RPI型卡环18例,RPA型20例,传统三臂卡环15,冠外附着体23例．义齿修复前以及修复后12个月拍摄基牙及远中牙槽骨定位X线片,计算剩余牙槽嵴的骨吸收量．结果：末端基牙远中牙槽骨的吸收：冠外附着体组吸收量最低,RPA组和RPI组低于传统三臂卡环组．结论：近中牙合支托设计的卡环,较远中牙合支托设计的卡环,更利于维护末端基牙远中牙槽骨的健康;冠外附着体更有利于保护基牙． 相似文献
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随着人工种植牙的不断广泛应用于临床并取得比较好的效果 ,目前种植体的植入方法正由过去的延期种植转向即刻种植 .笔者在近二年的人工种植体即刻种植 2 6例临床运用中观察体会到即刻种植技术与一般的种植技术相比 ,具有疗程短 ,费用低 ,骨损伤小 ,避免患者承受长期缺牙痛苦等特点 ,同时它能有效地解决拔牙后牙槽骨吸收导致骨量不足而使种植体植入困难或无法植入等问题 .本文就即刻种植临床应用方面的一些问题作一探讨 相似文献
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刘静 《赤峰学院学报(自然科学版)》2011,27(2):86-87
目的：通过对单个牙缺失进行种植义齿修复,探讨其即刻负重后种植体的稳定性和种植体周骨吸收情况.材料与方法：选择牙列缺损病例8例,使用Ankylos种植系统,共植入8颗种植体,所有病例均即刻临时冠修复并负重.一个月后安装永久修复体.术后采用平行投照法拍摄根尖片,观察术后即刻、3、6、12个月种植体周骨水平变化情况.临床观察种植修复体的稳定性.结果：即刻负重的种植体均获得骨结合,临床检查种植体稳定性良好,无失败病例.术后X线结果显示存在少量的骨吸收,12个月的骨吸收范围0.07-2.0mm.结论：初步研究表明单个种植义齿即刻负重可以获得良好的骨结合,且骨吸收不明显. 相似文献
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Bei LI Yao WANG 《Journal of Zhejiang University. Science. B》2014,15(12):1064-1071
研究目的：创新要点：研究方法：重要结论：观察人类上颌中切牙拔除后牙槽骨外形改建的规律。锥形束计算机断层摄影（CBCT）在口腔硬组织测量方面具有可靠性,在不同时期拍摄的影像中测量具有可重复性。本研究充分利用这一影像学工具观察人类上颌中切牙拔除后牙槽骨改建的规律。选择40名患者上颌中切牙拔牙前和拔牙后三个月时拍摄的两份CBCT影像资料。在第一次CBCT中,选取中切牙拔牙窝深、中、浅三个水平断层进行矢状断层重建,分别记录矢状断层起点到拟拔除中切牙（实验牙T）牙髓中心移动的层数,并测量实验牙T处牙槽骨宽度,在中切牙拔牙窝中层测量腭平面相关垂直距离。在第二次CBCT的三个水平断层上,依据第一次记录的移动层数定位实验牙T,并在定位处测量牙槽骨宽度。在中切牙拔牙窝中层上转移第一次CBCT记录的腭平面相关距离,并测量唇腭侧牙槽嵴顶沿原牙根外形垂直吸收的距离。上颌中切牙拔除后三个月,在拔牙窝的不同深度,唇侧的牙槽骨均有不同程度的水平骨吸收,越接近牙槽嵴项处牙槽骨吸收越明显。唇腭侧牙槽嵴顶均有明显的垂直骨吸收,唇侧牙槽嵴项的垂直骨吸收比腭侧明显。 相似文献
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自体红骨髓组织工程复合物治疗早期股骨头缺血性坏死 总被引：4，自引：0，他引：4
目的:探讨自体红骨髓组织工程复合物治疗早期股骨头缺血性坏死的临床应用疗效。方法:本组9例,男性8例,女性1例;双侧股骨头坏死2例,右单侧股骨头坏死5例,左单侧股骨头坏死2例;术前均行X线摄片、CT、MRI检查,ARCO分期:Ⅰ期4髋,Ⅱ期7髋;C型臂X线透视下行股骨头坏死区和囊性变区定位、髓芯减压,关节镜监视下,刮除坏死骨送病理;植入由自体红骨髓与含BMP的骨诱导活性材料复合成的非细胞型组织工程骨,并用空心钛钉支撑股骨头软骨下骨质。结果:术后主要观察患者跛行、疼痛、关节功能和影像学表现较术前改善率,本组9例均获得随访,随访时间12~24个月,平均18个月。术前术后采用12分法评分系统评定:优:6髋;良:4髋;可:1髋;差:0髋,优良率为90.9%。结论:自体红骨髓组织工程复合物植入结合临床应用髓芯减压、空心钛钉支撑,在减轻疼痛、改善股骨头内循环、促进骨修复、防止或延缓股骨头塌陷有极好的作用,为临床治疗成人ARCOⅠ期、Ⅱ期股骨头缺血性坏死一种有效的新方法。 相似文献
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BLB.IMZ及FRIALIT-2三种种植体在口腔修复的临床应用比较 总被引：1，自引：0，他引：1
因传统的口腔修复存在着许多缺陷及局限性,所以,近三十年来口腔科学领域研究及开发出一门新兴技术──口腔种植．我院从１９９７年引进了ＢＬＢ．ＩＭＺ．ＦＲＩＡＬＩＴ－２三种进口种植体．就三种种植体的临床应用比较我们进行了报告．印模方法：ＢＬＢ因为转移螺杆过长,托盘必须开窗,取下印模时也必须将螺杆拧松才能拿下,印模较复杂．ＩＭＺ及ＦＲＩＡＬＩＴ－２印模简便、准确．而ＦＲＩＡＬＥＴ－２转移系统因为有一塑料帽,则更为准确及便利．戴入方法：单独齿时,ＩＭＺ因基台有外六角结构,仅用垂直螺丝固定即可抗旋转．而 ＩＭＺ ＦＲＩＡＬＩＴ－２单独齿时,则需横向螺丝抗旋转．多个牙时,都用垂直螺丝固定．临床应用：术者到现在,共应用 １８例, ３７颗牙．其中 ＢＬＢ １２颗; ＩＭＺ １４颗;ＦＲＩＡＬＩＴ－２１１颗．最高年龄５２岁,最小年龄２０岁．植入部位： １２颗;１ ２颗;２１颗;４１颗;４１颗;５ １颗;６ １０颗;７ ６颗;６ ４颗; ７ ３颗; ６ ２颗;６ １颗;７ １颗;７１颗． ＢＬＢ． ＩＭＺ ＦＲＬＡＬＩＴ－２三种种植体,经过二年的临床观察,效果非常好．虽然,它们各有优缺点．但根据适应症选择其应用,不失为一种非常好的修复方法。 相似文献
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研究目的：探讨同一患者不同时期所拍的锥形束计算机断层摄影（CBCT）是否因每次拍摄时投照角度不可能完全一致而影响数据测量的准确性。创新要点：提出了一种人类后牙拔除后观察牙槽突外形变化的准确、无创、科学的定位方法。研究方法：选择首都医科大学附属北京口腔医院种植中心60名患者两份于上颌后牙种植前后拍摄的CBCT影像资料。以磨牙根分叉区三个牙根开始分开处（图像上显示为三根恰好融合的点）为基准点定位两次CBCT的起始水平断层。在第一次CBCT的起始水平断层上,连线牙列远端磨牙参照点即矢状断层起点与近端双尖牙的髓室中心进行矢状断层重建。若实验牙为第一磨牙,找到通过其腭根髓室中心的矢状断层;若实验牙为第二双尖牙,找到通过其髓室中心的矢状断层。记录由矢状断层起点到实验牙移动的层数N,在水平断层上测量实验牙牙槽骨宽度,在实验牙髓室中心的矢状断层上测量牙全长。在第二次CBCT中依据第一次记录的移动层数N定位矢状断层,在定位后的矢状断层上测量实验牙全长,在水平断层的相应定位处测量牙槽骨宽度。重要结论：利用本研究提出的定位方法可以精准定位同一患者不同CBCT影像资料中的同一断层,从而实现拔牙位点动态连续观察。 相似文献
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口腔种植学是目前发展极为迅速的一门学科,它与口腔领面外科学,牙周病学,口腔修复学、牙合学、材料学等学科都息息相关。针对口腔种植在临床上应用日趋广泛,患者对种植的需求也越来越多,口腔种植教育的多层次,分阶段的现状,本文主要从培养合格的口腔种植医生的角度出发,对在校教育期闯该课程的设置方面进行总结和探索。在目前口腔种植教育已形成了弹性的多层次、分阶段的教学体系格局下,口腔专业的院校除了要进一步加强口腔种植的大学教育外,还需与专业培训机构一同开展不同类型的毕业后教育课程。 相似文献
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目的通过分析泸州市医学新生口腔健康行为对牙龈出血的影响,促进早期牙周疾病防治。方法采用整群随机抽样的方法对西南医科大学713名医学新生进行问卷调查,采用2检验进行分析。结果医学新生牙龈出血总体发生率为63.7%;其中男生牙龈出血发生率为68.6%,女生为59.3%,差异有统计学意义(X^2=6.361,P<0.05);刷牙时间≤1分钟/次者牙龈出血发生率(74.5%)高于≥3分钟/次者(56.2%)(X^2=12.232,P<0.01);经常发生食物嵌塞者牙龈出血发生率(78.1%)高于未发生食物嵌塞者(60.3%)(X^2=7.370,P<0.05)。定期洁牙率为7.5%,牙线使用率为7.3%。结论医学新生牙龈出血发生率较高,口腔健康行为欠佳,应加强医学生口腔预防保健以及口腔健康教育,提高定期洁牙率和牙线使用率。 相似文献
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Min Han Rong-yang Wang Hong Liu Xiu-juan Zhu Fu-lan Wei Tao Lv Na-na Wang Li-hua Hu Guo-ju Li Dong-xu Liu Chun-ling Wang 《Journal of Zhejiang University. Science. B》2013,14(1):25-32
Objective:To investigate the relationship between growth patterns and mandibular posterior tooth-alveolar bone complex morphology in a Chinese population with normal occlusion.Methods:Forty-five patients with normal occlusion(23 males,22 females) were included in this study.Among these patients,20 displayed the vertical growth pattern,and 20 had the horizontal growth pattern,while the remaining patients displayed the average growth pattern.All of the patients underwent dental cone beam computed tomography(CBCT),which included the region of the mandibular posterior teeth and the alveolar.A linear regression analysis and a correlation analysis between the facial height index(FHI) and the alveolar bone morphology were performed.Results:The inclination of the molars,the thickness of the cortical bone,and the height of the mandibular bone differed significantly between patients with the horizontal growth pattern and those with the vertical growth pattern(P<0.05).Significant positive correlations were found between:the FHI and the inclination of the molars;the FHI and the thickness of the cortical bone;and the FHI and the height of the mandibular bone.Conclusions:The mandibular posterior tooth-alveolar bone complex morphology may be affected by growth patterns. 相似文献
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Masato Watanabe Yuya Yoneyama Hayato Hamada Michihide Kohno On Hasegawa Hidetoshi Takahashi Yoko Kawase-Koga Akira Matsuo Daichi Chikazu Shinichi Kawata Masahiro Itoh 《Anatomical sciences education》2020,13(5):628-635
The purpose of this study was to assess the usefulness of saturated salt solution-embalmed cadavers for oral surgical skills training related to bone graft harvesting. Two half-day surgical skills training workshops were held at the Tokyo Medical University utilizing eight cadavers embalmed with the saturated salt solution. A total of 22 participants including oral surgeons, residents, and dentists attended the workshop. Surgical training consisted of six procedures related to intraoral and extraoral bone harvesting. The participants were surveyed to assess self-confidence levels for each surgical procedure before and after completion of each workshop. The Wilcoxon signed-rank test was used to compare the differences between each median score before and after the workshop. There were statistically significant increases in the self-assessed confidence scores in bone harvesting procedures for the zygomatic bone (P = 0.003), maxillary tuberosity (P = 0.002), and other sites (P < 0.001). The anatomical features of saturated salt solution-embalmed cadavers were also examined. The textures of the oral mucosa and skin were similar to those of living individuals. The structure of bone tissues was well-preserved and the hardness was realistic. Consequently, all procedures were performed with sufficient realism. The saturated salt solution method has a relatively low cost of preparation and storage, and almost no odor. The authors suggest that saturated salt solution-embalmed cadavers could provide a new model for oral surgical skills training in bone harvesting. 相似文献
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It is essential for dental hygienists to have basic knowledge of gross anatomy to provide efficient treatment. However, gross anatomy course is relatively neglected due to their disparity from actual clinical dental practice. This study aimed to propose an effective dental hygiene gross anatomy curriculum that reflects the opinions of professional clinical dental hygienists. The study had an online-based cross-sectional design and the survey was distributed to clinical dental hygienists via social networks (n = 200). The questionnaire consisted of questions on the utilization of anatomical knowledge in clinical practice, opinions on the contents and methods of gross anatomy education, and general characteristics. The present study found that 186 (93%) used anatomical knowledge at an above-average level. Qualitative analysis indicated that dental implant surgery, radiography, and extraction were the clinical procedures that required the most anatomical knowledge. The clinical dental hygienists answered that the most-necessary knowledge is that of the mandibular nerve, followed by that on the temporomandibular joint, mandible, maxilla, maxillary nerve, and masticatory muscle. The methods proposed to improve gross anatomy education were (in decreasing order of importance) using videos or photographs (X-rays, CT, MRI, etc.), integrating education with clinical subjects, and using a three-dimensional visualization program. Higher education levels of respondents have increased their tendency to believe that the contents and methods of the presented education were necessary. Dental hygienists who utilized anatomical knowledge more often tended to be had a greater appreciation of the necessity of all educational contents and methods. 相似文献