RPD 11

Question 1

describe intracoronal attachments?

Answer 1

usually a pre fabricated key/keyway with PARALLEL walls, within the contour of a restoration, creating frictional resistance against the displacement of the PRDP

you can have a classless PRDP with vertical keyways in the crown! WOAH!

Question 2

what are extracoronal attachments?

Answer 2

create mechanical resistance to displacement through components attached to the external surface of an abutment tooth

Question 3

advantages of extracoronal?

Answer 3

esthterics
mechanical- funcitonal loads are more APICALLY directed
-improved cross arch load transfer and prosthesis stabilization

Question 4

where are functional loads MORE directed with extracoronal retention?

Answer 4

they’re more APICALLY directed

Question 5

what are the disadvantages of an extracoronal retainer?

Answer 5

complexity of the design, fabrication, and clinical treatment

demanding crown prep=== space for the attachment

needs vertical height of 4-6 mm

lab technique– path of insertion is critical

more dinero

wear components and maintenece

Question 6

what are the contraindications for extracoronal?

Answer 6

poor perio health

poor crown: root

compromised endo and restorative conditions

compormised manular dexterity

inadequate oral hygiene

Question 7

what is STEP 1!??

Answer 7

DESIGN THE PRDP FRAMEWORK

Question 8

step 2 for making a survey crown?

Answer 8

crown prep, impression, jaw relation record

Question 9

describe the crown prep for survey crown?

Answer 9

you have to create extra space for the occlusal rests in the crown prep–required for cingulum rest?

• Provisional crown
• VPS impression
• Jaw relation record– when is a record base/wax rim required?

Question 10

5th step- crown seating. describe

Answer 10

you want to prepare the rests, guide planes, tooth mods on natural abutment THEN make the framework impression