apex_locator_use[1]
![download apex_locator_use[1]](https://fdocuments.us/public/t1/desktop/images/details/download-thumbnail.png)
of 7
-
Upload
ruchi-juneja -
Category
Documents
-
view
216 -
download
0
Transcript of apex_locator_use[1]
-
8/7/2019 apex_locator_use[1]
1/7
What does the literature say
about canal diameters?
What does the literature say
about canal diameters?Median of maxillary canal diameters
1mm from apex
Mx. cent. incisor .34mm Lateral incisor .45mm
Canine .31mm
Premolar .37mm
MB1, MB2 (molar) .19mm
DB .22mm
Palatal .33mm
Median of maxillary canal diameters1mm from apex
Mx. cent. incisor .34mm Lateral incisor .45mm
Canine .31mm
Premolar .37mm
MB1, MB2 (molar) .19mm
DB .22mm
Palatal .33mmWu et al 2000
-
8/7/2019 apex_locator_use[1]
2/7
What does the literature say
about canal diameters?
What does the literature say
about canal diameters?Median of mandibular canal
diameters 1mm from apex
Md. central incisor .37mm Lateral incisor .37mm
Canine .31mm
Premolar .35mm
MB (molar) .40mm
ML .38mm
Distal .46mm
Median of mandibular canaldiameters 1mm from apex
Md. central incisor .37mm Lateral incisor .37mm
Canine .31mm
Premolar .35mm
MB (molar) .40mm
ML .38mm
Distal .46mmWu et al 2000
-
8/7/2019 apex_locator_use[1]
3/7
-
8/7/2019 apex_locator_use[1]
4/7
Radiographic
terminus alters
throughout life
cellular cementum
deposition
Radiographic
terminus alters
throughout life
cellular cementum
deposition
Apical foramenApical foramen
Radiographic Terminus NOT!!Radiographic Terminus NOT!!
-
8/7/2019 apex_locator_use[1]
5/7
Electric Foramenal LocatorsElectric Foramenal Locators
In 1962 Sunada determined that
the resistance between oral
mucosa and periodontal
ligament is a constant value 6.5ohms (40/Amp)
In 1962 Sunada determined that
the resistance between oral
mucosa and periodontal
ligament is a constant value 6.5ohms (40/Amp)
must turn unit on before attaching
probe to unit
might think in previous tooth canals can be wet, but chamber
must
be dry
no shared fluid between
canals
instrument must be free in access
opening
must turn unit on before attaching
probe to unit
might think in previous tooth canals can be wet, but chamber
must
be dry
no shared fluid between
canals
instrument must be free in access
opening
-
8/7/2019 apex_locator_use[1]
6/7
EAL = 0.0EAL = 0.0
Anatomic apexAnatomic apex
PDL,
cementum & bone
PDL,
cementum & bone
Bleeding pointBleeding point
**
-
8/7/2019 apex_locator_use[1]
7/7
Working LengthWorking Length
generic knowledge of root lengths
measure radiograph
advantage of digital images
foramenal locators
USED REPEATEDLY
final WL determined after coronal
debridement lengths change with
shaping
generic knowledge of root lengths
measure radiograph
advantage of digital images
foramenal locators
USED REPEATEDLY
final WL determined after coronal
debridement lengths change with
shaping
foramenal locatorsforamenal locators
USED REPEATEDLYUSED REPEATEDLY
![089 ' # '6& *#0 & 7 · 2018. 4. 1. · 1 1 ¢ 1 1 1 ï1 1 1 1 ¢ ¢ð1 1 ¢ 1 1 1 1 1 1 1ýzð1]þð1 1 1 1 1w ï 1 1 1w ð1 1w1 1 1 1 1 1 1 1 1 1 ¢1 1 1 1û](https://static.fdocuments.us/doc/165x107/60a360fa754ba45f27452969/089-6-0-7-2018-4-1-1-1-1-1-1-1-1-1-1-1-1-1.jpg)
![$1RYHO2SWLRQ &KDSWHU $ORN6KDUPD +HPDQJL6DQH … · 1 1 1 1 1 1 1 ¢1 1 1 1 1 ¢ 1 1 1 1 1 1 1w1¼1wv]1 1 1 1 1 1 1 1 1 1 1 1 1 ï1 ð1 1 1 1 1 3](https://static.fdocuments.us/doc/165x107/5f3ff1245bf7aa711f5af641/1ryho2swlrq-kdswhu-orn6kdupd-hpdqjl6dqh-1-1-1-1-1-1-1-1-1-1-1-1-1-1.jpg)
![1 $SU VW (G +LWDFKL +HDOWKFDUH %XVLQHVV 8QLW 1 X ñ 1 … · 2020. 5. 26. · 1 1 1 1 1 x 1 1 , x _ y ] 1 1 1 1 1 1 ¢ 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1](https://static.fdocuments.us/doc/165x107/5fbfc0fcc822f24c4706936b/1-su-vw-g-lwdfkl-hdowkfduh-xvlqhvv-8qlw-1-x-1-2020-5-26-1-1-1-1-1-x.jpg)
