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REMOVABLE > FInal material want to memorize > Flashcards

FInal material want to memorize Flashcards

1
Q

use palatal strap for

A

class III

small posterior edentulous areas, minimal tissue support required

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2
Q

use palatal plate for

A

I and II

[long span I and II with or without IV]

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3
Q

use anterior posterior strap for

A

I, II, with or without class IV (so can be used to replace anterior teeth)

or palatal tori

or strong, widely separated abutments

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4
Q

use horseshoe

A

high valuted palates
any connector is better than this
can be used to replace anterior teeth

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5
Q

use lingual bar

A

ONLY on tissues
#1 first choice

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6
Q

lingual plate

A

teeth and tissues
do NOT use when crowed anterior teeth

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7
Q

labial bar

A

used when have lingually inclined anterior or posterior teeth

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8
Q

name all maxillary major connectors

A

ant-post palatal strap
palatal plate
horseshoe
palatal strap

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9
Q

name all major mand connectors

A

lingual bar
lingual plate
labial bar

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10
Q

name all minor connector examples

A

-guiding plane plates
-meshwork to hold acrylic
-any unit connecting any type of rest to major connector
-indirect retainers
-direct retainers
-rests

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11
Q

when is indirect retainer always necessary

A

in class I or II situations

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12
Q

component used to retain and prevent dislodgement

A

direct retainers
like clasp assembly

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13
Q

component that helps direct retainer in preventing displacement by lever action of opposite side of fulcrum

A

indirect retainer

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14
Q

indirect retainer usually connects to major connector and is in some form of

A

rest

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15
Q

Cast for the purpose of diagnosis and treatment planning

A

dx cast

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16
Q

replica of teeth, residual ridges and other parts of the dental arch used to fabricate dental restoration or prosthesis

(used to make prosthesis)

A

master cast

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17
Q

where acrylic meets metal

A

external finish line

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18
Q

major connector want ___mm from GM

A

6 mm

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19
Q

minor connector want ___mm fron GM

A

3mm

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20
Q

palatal strap mm

A

8-10mm

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21
Q

ant-post straps mm

A

6-8mm

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22
Q

lingual bar mm

A

3 mm from gm, 4 mm width= 7mm total

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23
Q

use this mand major connector when have less than 7mm of space

A

lingual plate

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24
Q

As length is increased, frictional retention is increased and resistance to rotation is

A

increased

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25
width of guiding planes
1/3 B-L width of tooth 1/2 distance between cusps
26
length of tooth supported guiding planes: tooth-tissue supported guiding planes
tooth: 3-4mm tooth-tissue: 1.5-2mm (tooth supported like class III and IV have larger length of guiding planes) (support from tissue takes a role in stability also, so thats why smaller for tooth-tissue rpds)
27
four factors in finding path of insertion
1. guiding planes 2. retentive undercuts 3. interferences 4. esthetics
28
4 objectives of dental surveying
1. find path of insertion 2. mark HOC 3. measure/mark retentive undercut 4. tripod cast
29
retentive clasp location reciprocal clasp location
retentive clasp: proximal 2/3 suprabulge terminal 1/3: infrabulge 1 mm from GM in gingival 1/3 reciprocal clasp: all in infrabulge
30
if HOC too low, too high, no undercut, or inadquate undercut, what do you do
1. survey crown 2. enameloplasty to create undercut dimple 3. addition of composite at site
31
undercut gauges for Cr-CO Ni-Cr wrought wire clasp
Cr-Co and Cr-Ni are both 0.01' wrought wire is 0.02-0.03'
32
what is blue for rpd design
framework wrought wire clasp
33
what is red for rpd design
undercuts tooth modification areas (like rest seats) guiding planes survey line changes
34
what is black on rpd design:
survey lines tripod marks soft tissue undercuts
35
Impression for master cast when
after mouth preparations then resurvey master cast
36
primary retention of RPD
elements on abutment teeth
37
secondary retention of RPD
1. contact of minor connector with guiding plane 2. contact of denture base and max major connector with underlying tissues
38
two types of direct retainers:
1. intracoronal -key/keyway -needs crown -complex and high maintence 2. extracoronal -most common -CLASP ASSEMBLY
39
clasp types:
1. suprabulge -approaches from above HOC -circumferential, akers, circlet 2. infrabulge -approaches from below HOC -bar clasps (I-bar, T-bar, 1/2 T-bar)
40
with clasp assembly, you must always have:
1. rest 2. retentive clasp 3. reciprocal clasp 4. some type of minor connector
41
what are options of rests
1. occlusal rest 2. cingulum chevron rest 3. lingual ball rest 4. incisal rest
42
what are examples of reciprocal components
1. lingual plate 2. reciprocal clasp 3. proximal plate/guide plate
43
this requirement of clasp assembly resists vertical movement
support
44
this requirement of clasp assembly resists horizontal movement
stability -areas above HOC -all rigid component
45
Reciprocal component contacts tooth __________retentive clasp
at same time or BEFORE
46
become active ONLY when disclosing forces are applied to them
retentive clasp
47
when retentive clasp is doubled in length what happens to flexibility
8x more flexible
48
when retentive clasp is doubled in diameter, what happens to flexibility
8x less flexible (gets fatter; has nothing to do with 1/2 round or round shape. just fatter or not)
49
this cross section of clasp is almost always in circumferential clasps: this cross sectional of clasp is wrought wire:
1/2 round wrought wire: round
50
least flexible to most flexible material
Cr (0.01") < Gold (0.015") < Wrought wire (0.02") most flexible
51
this clasp PULLS towards occlusal to resist displacement:
circumferential clasp
52
this clasp PUSHES toward occlusal to resist displacement
bar clasp
53
6 types of retentive clasps
1. circlet 2. embrasure 3. RPC 4. reverse circlet 5. ring 6. combination
54
when to use circlet clasp (circumferential clasp type)
1. class III 2. engages undercut remote from edentulous area
55
when to use embrasure clasp:
1. class IV ! (esthetics) 2. class I or II withOUT Mods
56
when to use ring clasp
1. mesiolingually tipped mandibular molars 2. ML undercut avoid if possible
57
when to use combination clasp:
1. class I or II (distal extension) 2. wrought wire round retentive clasp 3. MF undercut 4. MUST be Distal rest
58
when to use reversed circlet clasp:
1. retentive undercut adjacent to edentulous space 2. class I, II, III 3. avoid if possible
59
when to use RPC:
Rest (mesial), Proximal plate, Circumferential clasp (and minor connector) 1. ML minor connector 2. MF undercut 3. class I or II 4. circumferential retentive clasp 1/2 round EXCEPT with periodontally comprised teeth or class I and NO mods
60
list the tooth-supported (class III and short span IV) clasp options:
**rests adjacent to edentulous area** 1. circlet 2. reverse circlet (when tissue undercut present) 3. embrasure 4. I-bar 5. 1/2 T-bar
61
list the clasp options for tooth-tissue (class I, II, and long span class IV)
***mesial rests preferred*** 1. RPC 2. RPI 3. reverse circumferential clasp 4. 1/2 T-bar 5. Combination clasp
62
what type of lever do we want to create? and explain
class II lever (fulcrum line) 1. mesial rest 2. distal guide plane this is a stress release clasp design
63
RPI clasp design:
-MF or Mid-F undercut -ML minor connector -M rest -D proximal plate (line angle to line angle) CANT USE WHEN: tissue undercuts, shallow vestibule, abutment excess facial inclination
64
minimum reduction needed for rest seat
1mm
65
directs forces down the long axis of the teeth and prevents cervical movement of the RPD
function of rests
66
5 types of rests
occlusal embrasure hooded incisal cingulum
67
the major connector has 3 importants things must do
1. counter leverage 2. cross-arch stabilization 3. unification of components
68
major connectors are placed how many mm away from gingival margins in max and mand
max: 6mm mand: 3mm
69
once impression is taken for making cast, the impression should be poured within ____mins
12 **put in bag with little water!
70
separate impression from cast in ____mins
45-60 mis
71
denture base movement rotation occurs TOWARDS the tissue around the
most distal rests
72
denture base movement rotation occurs AWAY from the tissue around
distal most retentive tips
73
this is known as what distributes the forces of occlusion over as many teeth and as much soft tissue area as possible
broad-stress distribution stress= occlusal forces/area [increased area= decreased stress]
74
this is essential to prevent displacement or deformation of metal framework during resin packing procedures
tissue stops

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