Removable Partial Denture Model designing 模型设计 魏 斌 What Is the Model Designing ? Clinical steps System Design For Dentures (complaint, history,examination) Laboratory steps ---Model designing  复习义齿修复的全过程  了解”模型设计”的所处的位置及重要 性 Procedure 1.

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Transcript Removable Partial Denture Model designing 模型设计 魏 斌 What Is the Model Designing ? Clinical steps System Design For Dentures (complaint, history,examination) Laboratory steps ---Model designing  复习义齿修复的全过程  了解”模型设计”的所处的位置及重要 性 Procedure 1.

Removable Partial Denture
Model designing
模型设计
魏 斌
What Is the Model Designing ?
Clinical steps
System Design
For Dentures
(complaint, history,examination)
Laboratory steps
---Model designing

复习义齿修复的全过程

了解”模型设计”的所处的位置及重要
性
Procedure
1. Surveying
模型观测
2. To choose the insert-path
选择就位道
3. Final designing
义齿的最后设计
Study cast
 Surveyor

研究模
观测仪
1. surveying

With the help of the surveyor

Observation,measurement and marking

According to it, to choose
The path of insertion
it’s the aim of the surveying
Surveying rod
cast
working plate
Surveyor
Surveying rod
Several kinds of rods
Analysing rod
Graphite marker
Undercut gauge
Trimming knife
Analysing rod
1. To find and identify the undercut
(倒凹)
2. To determine the parallelism of the surfaces
Graphite marker
To identify and mark
the position of maximum convexity
SURVEY LINE (观测线)
review?


Changeable
Undercut and non-undercut
Undercut gauge
(倒凹计)
1. To measure the extent of horizontal undercut
2. Adjusting the vertical position of the gauge
until the head contact the surface of the teeth
3. Following sizes are available :
0.25, 0.5,0.75(mm)

position of The retentive clasp

type and material of the clasp
0.75
trimming knife
To eliminate unwanted undercuts
wax is added
The excess is removed
A duplicate cast is made
2. Path of Insertion
• Why should we
choose the Path of Insertion?
• How to
choose the Path of Insertion?
• Why should we
choose the Path of Insertion?
Appearance
Interference
Retention
Appearance
Insert vertically
Insert forward
Interference
Insert vertically
Insert forward
Retention

Path of insertion (1)

Path of displacement(2)

Path of withdraw (3)
Occlusal
plane
 The angle
3
•
How to
choose the Path of Insertion?
To tilt the working
plate and cast
Change the angle
between the analysing
rod and the occlusal
plane
Working plate
Relationship between the rod and cast
Rod= the path of insertion
Example 1
Appearance
?
Example 2
Tiled casts
前
后
前倾
左
右
左侧倾斜
后倾
右侧倾斜
Example 3
Average
将缺牙区前后基牙邻面的倒凹或左右两侧基牙舌侧的倒凹进行平
均分配。适用于基牙倾斜扭转,倒凹明显者。使用均凹法后可避免一侧
倒凹过大,方便义齿就位。
角平
分线
Example 4

调凹法:
是根据义齿固位的需要,有意识地将模型向近远中或左右向倾斜,
使倒凹集中在某一侧以增强固位。适用于基牙倒凹不大,无明显倾斜
移位者。
3. Final survey
Different survey line
 Different clasp design
(include the kind,position,and etc.)

3.最后设计(final survey)

根据模型设计,结合临床检查,确定就位道方向.

根据所确定的就位道画出基牙观测线.

确定使用的固位体类型及安放的位置.

确定间接固位体、大小连接体、支架的位置及
基托伸展的范围。
填倒凹

设计方案确定后,即可明确基牙和软组织倒
凹的位置和大小。
目的:方便义齿的取戴,同时避免过大的缝隙。
方法:人造石填补,
运用带刃的观测杆修
整石膏。
确定颌位关系及上合架
颌位记录的三种方法
P235
颌位记录的方法

颌位记录(recording jaw relationship)

目的:将上下颌间正确的咬合关系转移到合架上,
为义齿制作提供依据,具有非常重要的作用。
方法

余留牙确定法

蜡合记录法

合堤记录法
1.余留牙确定法

适用:缺牙少,上下颌模
型对合好

临床操作
6
右侧位
缺失
左侧位
2.蜡合记录法

适用:口腔内有咬合关系,而模型上咬合关系不稳定
(余留牙体磨耗、缺损、倾斜、移位,造成上下颌牙对
应锁结关系不明显 )

蜡合(2-3层蜡片,宽约1cm)

临床操作
3. 合堤记录法
最常用的测合方法
 适用:模型上咬合不稳定,或丧失正确咬合
a
b
c
d
关系患者.
多数牙缺失,仅有个别牙上下对应
末端游离缺失,大部分前牙缺失
上下颌无对应牙或单颌缺失
错误的咬合关系,如偏颌、垂直距离降低
(磨耗、后牙缺失)

合堤(occlusal rim) 合托,蜡堤

临床操作

注意点:校正(checking):须反复核对
修整(trimming):去除模型上干扰因素
蜡堤
合托
67 4-7 缺失
上颌架

目的: 将模型上记录所得的合关系转移到合架上
口腔

方法
颌记录
模型
上颌架
颌架
颌架
复习题
选择义齿就位道有什么要求?