prof. dr. : ahlam el-sharkawy head of the prosthodontic department pharos university in alexandria
TRANSCRIPT
Class IIISemi-
adjustable condylar
path articulators
Prof. Dr. : Ahlam El-Sharkawy
Head of the Prosthodont
ic Department
Pharos University
in Alexandria
1-Accepts facebow transfer record to mount upper cast.
Semi-Adjustable ArticulatorsAccept the following records
2- Accepts centric relation record to mount the lower cast.
3- Accepts protrusive records to adjust the articulator’s horizontal guidance.
4- Adjusted incisal guidance angle .
5- The lateral condylar guidance is adjusted according to the Hanau’s formula
L=H/8+12
SEMI-ADJUSTABLE ARTICULATORS
L = the lateral condylar path
H = the horizontal condylar path angle which is recorded from the patient.
6-Intercondylar distance fixed at 110mm
Fully Adjustable Condylar Path Articulators
Class IV
Prof.Dr. Ahlam El-SharkawyHead of prosthodontic departement Pharos University in Alexandria
Fully adjustable articulator
Complex Designed to duplicate TMJ features
Accept the following records:
1-Accept Face bow record to mount the upper cast.
Fully adjustable articulators
2-Accept centric occluding relation record to mount the lower cast.
3-Accept protrusive record to adjust the articulator horizontal condylar angles.
4-Accept right lateral record, to adjust the right condylar angle.
5-Accept left lateral record, to adjust the left condylar angle.
Fully adjustable articulators
6- Incisal guidance angle adjusted according to the patient .
6- Inter-condylar distance adjusted accordingto the patient.
Point Of Difference
Simple Hinge
Mean Value
Semi-Adjustable
Fully-Adjustable
Horizontal Angle
Lateral Angle
Incisal Angle
Incisal Pin
Inter Condylar distance
Face bow Arcon/Non.
CLASSIFICATION Depends on the location of the condyle
whether in the upper or lower member of the articulator:
1- Arcon articulator. 2- Non Arcon articulator.
Prof.Dr. Ahlam El-SharkawyHead of prosthodontic departement Pharos University in Alexandria
ARCON ARTICULATOR The condyles are located on the lower
member of the articulator and the condylar guidances are on the upper member.
AR=Articulator Con= Condyle.
NON ARCON ARTICULATOR. The condyles are located on the upper
member of the articulator and the condylar Guidance on the lower member.
ARTICULATOR DESIGN
Arcon - condylar element on lower Just like the condyles are attached
to the mandible Mechanical fossae located on the
upper member just like the glenoid fossae
Non Arcon - condylar element on upper Unlike natural anatomy The condylar path (glenoid fossae)
is located on the lower member