Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

BDS4 Restorative Dentistry > Bridgework 1 > Flashcards

Bridgework 1 Flashcards

(84 cards)

Start Studying
1
Q

What are tx options for missing teeth? (5)

A

No tx - leave space as is

RPD/ Complete denture

Bridgework

Implants

Close space with ortho tx

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

When might opting for no tx when missing teeth be an option?

A

Posterior teeth

uncommon in anterior teeth as aesthetic zone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

When are RPDs a less viable option for replacing missing teeth?

A

When only small number of missing teeth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How do we restore teeth after implant placement?

A

Crown
Bridge
Implant retained denture

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Why do we tx tooth loss? (4)

A

Aesthetics
Function
Speech
Maintain dental health of other teeth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How can missing teeth affect other teeth?

A

If we have edentulous space, adjacent teeth can tilt or over erupt which can have long term effect on prognosis of tooth (root exposure, sensitivity, more caries prone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is a bridge?

A

dental prosthesis that replaces missing tooth or teeth and is attached to one or more natural teeth or implants

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is different between a RPD and bridgework?

A

RPD replaces tsoft tissue and bone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What are the two categories of bridgework?

A

Adhesive (held on with wings to palatal surface of teeth)

Conventional - held on with crowns

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are some general indications of bridgework? (6)

A

Function and stability reasons (eating etc)

Appearance (aesthetics)

SPeech

Psychological reasons - some pts struggle with concept of removable prosthesis

Systemic disease - pts with epilepsy likely to inhale denture or break risk during fit

cooperative pt - pt withe excellent OH, complaint, no active disase, wanting to look after teeth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Why may bridgework be better with pt for epilepsy that RPD?

A

Risk of inhalation and RPD #during seizure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What are some local indications of bridgework? 4

A

Big teeth

Heavily restored teeth (if already compromised then good for conventional bridgework - not destroying lots of tooth tissue as already lost)

Favourable abutment angles

Favourable occlusion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What are some local indications of bridgework? 4

A

Big teeth

Heavily restored teeth (if already compromised then good for conventional bridgework - not destroying lots of tooth tissue as already lost)

Favourable abutment angles

Favourable occlusion - not heavy occlusal contacts as risks bridge fracture or loss of bridge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are general contraindications for bridgework? (6)

A

large pulps - conventional bridge not good as crown prep reuquired to hold bridge on and pulp exposure likely

Poor OH

Unccoperatiev pt - poor OH, lack of interest in dental health, active disease

MH contraindications - allergy to metals

High caries rate

PD disease

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are some local contraidincations fo bridgework? (8)

A

High possibility of further tooth loss - if pt is likely to lose more teeth and have large edentulous area then consider denture

Poor prognosis of abutment teeth

large edentulous area (we want to replace as few teeth as possible)

Ridge form and tissue loss (if lots of bone and soft tissue loss denture better for replacing this as bridge only replaces tooth)

Titling and rotating of teeth

if large resto and no tooth left after prep

PA status - active endo or perio disease is NO

PD status - advanced bone loss, abutment teeth poorly supported by alveolar bone so not ideal for occlusal load

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is an abutment?

A

This is a tooth that is used as bridge attachment

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is a Pontic?

A

This is area/false tooth that replaces missing tooth and is attached to abutment tooth/teeth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is a retainers?

A

These are extra coronal or intra coronal restorations that are connected to Pontic and cemented to prepared abutment teeth (can be metal wing in adhesive bridges or conventional crowns)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is a connector?

A

This is a component that connect Pontic to retainer/retainers (Pontic = missing teeth that are replaced, retainer is the metal work palatally in adhesive or crowns in convention and is intra or extra coronal resto connected to Pontic and cemented to abutment teeth)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is a saddle?

A

This is an ara of edentulous ridge over which the Pontic lies

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What is a pier?

A

This is an abutment tooth which stands between and supports two poetics, each is attached to another abutment tooth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What is a 3 unit bridge?

A

This is when a bridge can have two retainers and one photic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What is a unit?

A

Can be a retainer or a Pontic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What is a fixed fixed bridge?

A

This is a bridge with a retainer at each end of the Pontic in the middle joined by RIGID connectors

RETAINER PONTIC RETAINER

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
What are the two types of fixed fixed bridges?
Adhesive/resin retained conventional
25
What is a cantilever bridge?
Retainer PONTIC Adhesive or conventional
26
What is resin bonded bridgework also known as?
Adhesive resin retained bridgework minimal prep bridgework Maryland bridge
27
What is the Pontic and retainer most commonly made out of in adhesive bridges?
Porcelain - pontic Cocr - retainer or all ceramic
28
What are 6 advantages of adhesive bridgework?
Minimal tooth prep required/ or none No LA needed Less costly Less surgery time Good for provisional restorations in hypodontia cases If failure --> less restrictive due to minimal prep so pt not much worse off
29
What are some disadvantages of adhesive bridgework?
Difficult clinical technique - resin retained os moisture control very important as held in by composite cement or wont last long Metal can shine through - if poorly designed or cemented poorly and if pt has translucent incisal edges porcelain chipping off Pontic can debond (we can recumbent but first bond is best bond so will become weaker and higher debond chance) occlusal interference - high bridges over time can reorganise occlusion via Dahl concept no trial period possible - we can't check occlusal and excersive movemebts
30
Why may adhesive bridgework have metal sheen through?
Transparent incisal edges poor design poor cememtnation
31
What ice most common disadvantage of adhesive bridgework?
Porcelin chipping from Pontic
32
What is the issue with porcelain bridgework debonding?
First bond strongest second bond has less strength so higher chance of debunking
33
What is the only thing we can guarantee pts with restorative work?
It will fail eventually
34
What are indications of adhesive bonded bridges?
Young teeth (less destruction as no minimal prep req) Large abutment tooth surface with large bonding area which increases retention single tooth replacement minimal occlusal load remove need for partial denture
35
Why are adhesive bonded bridges good for young teeth?
They are minimally destructive as little to no prep is reqiuires
36
Why do we want large abutment teeth for adhesive bridges?
Larger surface area to bond to so increased retention
37
What are contraindications to adhesive bridges?
Lack of enamel Insufficent quality of enamel Excessive soft or hard tissue loss Parafunctional habits such as bruxism leading to high occlusal force which will lead to fracture or debone of bridgework Pt plays contact sports such as rugby, boxing that has high risk of facial trauma inc debunking of bridge
38
How do we tx plan for bridges?
History - SH important, stresses, habits, bruxist Examination - check occlusal relationships (dynamic and static), PD status, radiological status - caries, PA pathology, bone levels must assess abutment teeth
39
In potential bridgework cases what do we create?
Study casts (take imps of pt and send to lab and then mount on semi-adjustable articulator with face bow registration (esp I canines) we then can consider wax up to show pt final aesthetic result and allows us to look at occlusal relationship - if any heavy contacts
40
When we do a bridge what do we look at?
Abutment teeth Occlusion Aesthetics - soft tissue contour pts OH
41
Why do we consider occlusion in bridgework cases?
We want to look at: OPPOSING DENTITION (contact points) if theres any over euption of opposing teeth any parafucntional habits - bruxism (lines alba, attrition, scalloped tongue) Dyanamic occlusal relationships - clinically and on study casts
42
What is a direct resin bonded bridge?
This is a type of bridge that is useful in EMERGENCY SITUATIONS - if pt comes in with trauma and tooth has been avulsed leaving edentulous space then we can use pts tooth to create a temporary direct bridge for aesthetic reasons until perm bridge is fabricated
43
What can we use for direct bridge if pt doesn't have their tooth?
Acrylic denture tooth from lab prefabricated polycarbonate crown cellulose matrix filled with composite
44
What are the problems with direct bridges?
Poor aesthetics Short lasting - fail at quick rate
45
What are advantages of direct bridges?
gives pt immediate sort term solution and buys them time while we plan for implant/bridge/denture
46
How would we construct direct bridge following traumatic avulsion of 11
Cut the root of 11 Drill out any pulpal tissue Etch contact points of 11 PLace composite over hole at crown going into pulp chamber place etch on adjacent teeth followed by bond place tooth in situate, with composite to splint teeth together creating direct resin bonded bridge
47
What is an indirect bridge?
This is where prosthesis is made in the lab (pt attends, tooth prep if req --> lab constructs prostheses --> pt returns for cementing)
48
Why do we not like heavy prep in adhesive bonded bridges?
Dentine has poor bond that enamel so we dont want any prep or minimal prep if req
49
How much coverage do we need for adhesive bridges?
LArge SA as possible of palatal/lingual covering as more enamel we cover then greater the bond
50
What is the issue with fixed-fixed adhesive bonded bridges?
One wing can debone whilst other is still in position resulting in pt not noticing but bacteria can then ingress under debunked wing resulting in caries in abutment tooth
51
What quality of enamel do we need for adhesive bonded bridges?
Good quality - as we are bonding directly to enamel and rely on this for adhesion of bridge
52
Why do we need to be careful with incisal edge coverage in adhesive bonded bridges?
incisal edges can be transulcent resulting in metal shine through
53
What type of bridge we normally use for anterior teeth?
Adhesive cantilever bridgework
54
What are divergent guidance pathways?
This describes how in the maxilla the longitudinal axis of teeth are all different as we go through the arch resulting in occlusal forces being directed down the teeth in different ways CANINE AND CENTRALS FORCE IS DIRECTED IN DIFF WAYS
55
What bridgework do we usually use on posterior teeth?
Adhesive bonded fixed fixed design - metal wings designed differently so more obvious when they have debunked
56
Why do we need sound enamel for adhesive bridgework?
As we bond to enamel
57
Can we do adhesive bridgework on a. tooth restored with composite?
Yes as composite bonds to composite - but consider replacing composite before bridge if old
58
How can we modify the composite restoration for adhesive bridgework placement?
Can use rose head bur to roughen up the composite so resin cement sticks better
59
Can we do adhesive bridgework to tooth with AM filling?
No - poor bond of Am to composite - consider replacement if this is tx option
60
How is minimal bridgework prep done fo adhesive bonded bridges?
180 degree wrap around on PALATAL OR LINGUAL SURFACE with supra gingival chamfer finish line 0.5mm above gingival margin We can also prep rests (cingulum on anterior, east east on posterior teeth) which gives us mechanical retention and helps to locate retainer when we come to cement it) can add in proximal grooves to aid mechanical retention
61
What can we do to aid retention of adhesive bonded bridges?
We can get mechanical retention via: - rest seat preps (cingulum anterior, rest seats posterior) - proximal grooves
62
What is the finish line for adhesive bonded bridges?
0.5mm chamfer line supra gingivally
63
How would we do adhesive bonded bridgework prep on an anterior tooth with a heavy occlusal contact on abutment tooth that requires minimal prep?
Occlusal contact reduction - due to heavy contact on abutment teeth remove cingulum undercut s 0.5mm chamfer margin palatally/lingually spragingivally
64
How would we do adhesive bonded bridgework prep on an anterior tooth with a heavy occlusal contact on abutment tooth that requires heavier prep?
Occlusal contact reduction if heavy occlusal contact on abutment tooth 0.5mm palatal reduction (metal retainer is 0.7mm thick) - 0.2mm may feel high but will settle cingulum rests proximal groovers chamfer margin 0.5mm supra gingival palatally
65
What adhesive bridgework design do we use: anteriorly? posteriorly?
Anterior = cantilever posterior = fixed fixed
66
Why do we use fixed fixed adhesive bridgework on posterior teeth?
Replacing larger tooth so we dont want abutment tooth carrying large occlusal load down single abutment tooth - we want to spread this land over larger surface area of 2 abutment teeth
67
What is the ideal prep for posterior fixed fixed adhesive bridgework?
Ideally none but we normally do some to prepare rest seats which are 2mm deep
68
How do we carry out prep of posterior adhesive fixed fixed bridge?
Occlusal rest east - 2mm deep 180 degree finish line palatally or lingua with 0.5mm supraginvgal chamfer proximal grooves can be put in middle aspect but this is far
69
What can be used whilst pt is waiting for definite e resin bonded bridge?
Essix retainer with missing tooth incorporated
70
If prep is in enamell only do we need demo bridge?
No - as only in enamel but if pt has sensitivity then can suggest sensitive toothpaste, duraphat or DBA (thin layer)
71
If we do tooth pre into dentine what can we do for the patient?
Apply dentine bonding agent layer
72
What can happen if there is delay between bridge prep and bridge fit?
If longer than 2 weeks teeth may begin tilting and over erupting which isn't ideal
73
What does the lab do to the retainer of the bridge?
The lab will sandblast metal work as this creates small indentation on fitting surface of which resin can flow into and set and lock to give micro mechanical retention
74
In bridgework what is used to help inc bond?
Aluminium oxide
75
What do we cement bridgework with?
Panavia 21 EX
76
Can we try in bridge work?
Yes we can hold bridge work in with finger or ask lab to make locating hook on retainer which goes over incisal edge and goes over retainer tooth (abutment) and holds in place temporarily so pt can see aesthetics and we can check occlusion if we dont have the locating hooks then we can place composite on fitting surface of retainer and it will hold enough to check aesthetics and occlusion
77
What if bridgework retainer doesn't have locating hook?
We can use composite on retainer and the will hold enough to try in and check aesthetics and occlusion but will have to clean up composite - UNSET COMPOSITE
78
If we try in bridgework retainer what must we do?
Clean retainer beofore final cement - can use US bath or ethanol to degrease
79
What do we apply to adhesive bridgework before placement?
Chemically cured composite luting cement
80
How do we prep tooth for bridge placeent
isolation with dam etch Applying A+B primer with micro brush for 3 seconds - 5 lauyers on abutment tooth and air dry for 2 seconds NO NEED TO CRE Fit retainerr coated with luting cement to abutment tooth remove excess cement place oxygen inhibitor around cement margins for 3 mins then wash off
81
Do we use bond for adhesive bridge cases?
NO after etch we apply A+B primer 1 layer = air dry 2 seconds 5 times then apply cement coated bridge
82
What dow e do after cementation of bridgework?
check occlusion - both static and dynamic - demonstarte cleaning of bridge with superfood (thin bit fed under Pontic and pull up until thick bit underneath then see under
83
What are survival rates of resin bonded bridges?
80% 5 and 10 year survive;

BDS4 Restorative Dentistry (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions