06级口腔修复学-牙体缺损修复-全冠1课件.ppt

1、Dalian Medical University College of Stomatology-牙牙 体体 缺缺 损损 修修 复复Dalian Medical University College of Stomatology全冠：全冠：覆盖整个牙冠表面的修复体，与牙体接触覆盖整个牙冠表面的修复体，与牙体接触 面积大，固位力强，对牙保护作用好。面积大，固位力强，对牙保护作用好。-就结构和材料不同分为：就结构和材料不同分为：金属全冠金属全冠 非金属全冠非金属全冠 金属金属-非金属全冠非金属全冠 Dalian Medical University College of StomatologyDa

2、lian Medical University College of StomatologyDalian Medical University College of StomatologyDalian Medical University College of StomatologyDalian Medical University College of StomatologyDalian Medical University College of StomatologyDalian Medical University College of StomatologyDalian Medical

3、 University College of Stomatology 铸造全冠的牙体制备原则与嵌体及部分冠的牙体铸造全冠的牙体制备原则与嵌体及部分冠的牙体 制备相似，但其外形及固位原则与之不同，因此，制备相似，但其外形及固位原则与之不同，因此，铸造全冠的牙体制备应注意：铸造全冠的牙体制备应注意：n冠边缘的位置冠边缘的位置：龈上、龈下：龈上、龈下n保证铸造全冠能获得最大固位力保证铸造全冠能获得最大固位力：冠高、平行、解剖形态、冠高、平行、解剖形态、辅助固位形辅助固位形Dalian Medical University College of StomatologyDalian Medical Un

4、iversity College of StomatologyDalian Medical University College of StomatologyDalian Medical University College of Stomatology用无蜡牙线浸蘸用无蜡牙线浸蘸0.1%0.1%的肾上腺素或成品排龈线压人龈沟的肾上腺素或成品排龈线压人龈沟 内内2-3 min2-3 min，使游离龈退缩，使游离龈退缩Dalian Medical University College of StomatologyDalian Medical University College of Stoma

5、tology（一）排龈：又称龈缘收缩（一）排龈：又称龈缘收缩（gingival retraction）Dalian Medical University College of StomatologyDalian Medical University College of Stomatology（二）托盘与印模材料（二）托盘与印模材料Dalian Medical University College of Stomatology（二）托盘与印模材料（二）托盘与印模材料Dalian Medical University College of Stomatology（三）取模方法（三）取模方法Dal

6、ian Medical University College of Stomatology（一（一)暂时冠的作用暂时冠的作用 （二（二)制作方法制作方法 Dalian Medical University College of Stomatology（一（一)模型的基本要求模型的基本要求 （二（二)模型的灌注：模型的灌注：Dalian Medical University College of Stomatology（三（三)可卸代型模型的制作可卸代型模型的制作 Dalian Medical University College of StomatologyDalian Medical Uni

7、versity College of StomatologyDalian Medical University College of StomatologyDalian Medical University College of Stomatology七、熔模制作（七、熔模制作（wax-up）Dalian Medical University College of Stomatology八、包埋（八、包埋（investment）Dalian Medical University College of Stomatology九、焙烧、铸造九、焙烧、铸造 Dalian Medical Univer

8、sity College of Stomatology十、铸件清理十、铸件清理 Dalian Medical University College of Stomatology十一、试戴、磨平、抛光十一、试戴、磨平、抛光 Dalian Medical University College of Stomatology十二、口内试戴、调磨、粘固十二、口内试戴、调磨、粘固 就位就位固位固位邻接邻接咬合咬合 Dalian Medical University College of StomatologyDalian Medical University College of StomatologyD

9、alian Medical University College of Stomatology 牙体预备要求：牙体预备要求：使用使用厚度一定的成品冠厚度一定的成品冠，故牙体磨除量比铸造冠少，故牙体磨除量比铸造冠少 （1 1）轴面预备目的：）轴面预备目的：消除倒凹，将最大周径线降至冠边缘，消除倒凹，将最大周径线降至冠边缘，留出成品冠的间隙留出成品冠的间隙 （2 2）牙合面沿外形磨除约）牙合面沿外形磨除约0.30.5 mm 锤造冠与牙体间大部分不接触，粘固时间隙为粘固剂充满锤造冠与牙体间大部分不接触，粘固时间隙为粘固剂充满Dalian Medical University College of StomatologyThank you for your attentionDalian Medical University College of Stomatology