Intro to Implant Dentistry Flashcards
(148 cards)
1
Q
% US pop 18yo+ fully dentate;
A
30%
2
Q
Functional dentition:
A
21+ natural teeth
3
Q
% of US pop 21+ w functional dentition:
A
71.7%
4
Q
% of US pop 50+ w functional dentition:
A
42.4%
5
Q
State w lowest rate of edentulism:
A
hawaii (16%)
6
Q
State with highest rate of edentulism:
A
Kentucky (44%)
7
Q
Most commonly missing tooth type:
A
molars
8
Q
In which arch is reer-end edentulism more common:
A
mandible
9
Q
1 out of __ in US pop have removable prosth:
A
5
10
Q
% of US pop missing at least 1 tooth:
A
70%
11
Q
2 main issues with free-end edentulism:
A
lack of stability, poor masticatin
12
Q
Edentulism is __ times more common in which arch?
A
35, maxilla
13
Q
% of US pop edentulous in 1 arch:
A
7%
14
Q
% of US pop totally edentulous:
A
10.5%
15
Q
2 primary reasons for tooth loss:
A
caries, pdd
16
Q
Benefits of implants;
A
bone preservation/ regeneration, functional benefits, comforting benefits, pt satisfaction and quality of ife, esthetics, preservation of the biological env
17
Q
Why does bone need stimulation:
A
to maintain form and density
18
Q
% initial bone loss w placement of implant:
A
25%
19
Q
Implants can be splinted via:
A
ridges
20
Q
How to preserve bone height and width most effectively:
A
immediate implant placement
21
Q
TF? Implant fixed dentures can not preserve bone.
A
F. and regeneration for some
22
Q
If pt has this disease you can’t do implant.
A
patient has severe, uncontrolled diabetes, bridge avg life is 10-15y max
23
Q
Why is age such an important factor to consider when deciding whether to recommend RPD for a pt?
A
an RPD will wear on a tooth over time and will eventually need replacing, each time you prep more tooth structure
24
Q
Could a person theoretically change Bone type in a region of the mouth by exerting more masticatory force in that area?
A
ask check
25
Better option for person w sever bone loss?
implants, a very large denture may break the jaw
26
Max biting force implant overdenture vs. implants:
75N to 132 N
27
IOD sf:
implant overdenture
28
TF? Implants improve digestion over complete dentures
T
29
Max biting force Implant Fixed Complete Denture vs. implants:
250N vs. 132N
30
Benefit of implant over prosth:
less pain, less instability, most pts think operation is comfortable
31
Esthetic benefit of implants over dentures:
teeth better positioning, enhanced facial esthetics, better color matching
32
Appearance due to loss of VD:
prognathic
33
Esthetics consequences of edentulism:
prognathic appearance, thinning of the lips (esp max), dec facial ht, dec horizontal labial angle, loss of tone in muscles o facial expression
34
This allows for us to create proper lip height and lip protrusion even if there is a lot of bone loss:
bar connecting the series of implants that is higher than the most coronal portion of the implant
35
Preservation benefits of implants:
adjacent teeth are not prepped, less likely to cause caries, higher level of perio health, better gingival appearance and health
36
Potential issue w placing a conventional FPD in the esthetic zone:
margins may show w recession
37
This must be done first to place an implant if a tooth has never erupted:
bone grafting, or possibly do both at the same time
38
Skinny implant diameter:
33/3.5, ideal for 24/25
39
Placement of #3 implant
just below sinus
40
Implants are made of:
alloplastic material(s)
41
Diameter of mini implants:
2.3 and below
42
mini implant placement:
through soft tissue, above or 3,4,5,mm
43
Tissue level implant: (check)
screw portion buried in bone, part flares out at level of mucosa, glossy and polished, stays at mucosal height, does not protrude into oral cavity
44
Thin layer covering the bone:
periosteum
45
implant that gets primary support by resting on bone:
eposteal
46
implant in alveolar and/or basal bone and transecting only 1 cortical plate:
endosteal
47
implant that penetrates both cortical plats and passes through the full thickness of the alveolar bone
transosteal/ transmandibular
48
most commonly used type of implant:
endosteal
49
Eposteal, aka:
subperiosteal
50
Transosteal, aka:
transmandibular
51
2 types of endosteal implants:
plate form (blade implants), root form (root shaped)
52
Implants used primarily for edentulous arch:
eposteal, transosteal
53
Type of implant that looks like a cork-screw in bone:
endosteal root form
54
Type of implant that has a long span, horizontally positioned RGO metal piece:
endosteal blade implant
55
Are endosteal blade implants an option for a person w severe bone loss?
yes
56
Location of implant on weblike full coverage maxillary RGO structure:
bw periosteum and bone, submaxillary implant
57
submaxillary implant:
bw periosteum and bone
58
To identify transosteal:
implant protrudes below the mandible
59
Transosteal transect both ot these part of the bone:
coronal and apical cortical plates (check)
60
Osseous integration depends on:
quality of the bone
61
Define osseointegration:
bone to implant w/o CT bw
62
sits between bone and periosteum (makes new bone w osteoblasts), so there will be a thin layer of bone above the implant:
eposteal
63
TF? Root form endosteal implant will lead to oseointegration.
T
64
Implants req these 2 things for osseointegration anchorage and retention:
mechanical retention, bioactive retention
65
This provides bioactive retention:
hydroxyapetite, bond directly to bone
66
Provides mechanical retention:
metallic substrate (Ti or alloy) w UC's like vents, slots, dimples, screws in direct contact w bone and no chemical bonding
67
How to get 100% bone contact in implant interface:
impossible
68
TF? Successful implant requires CT bw bone/implant interface.
F!!!
69
__mm of bone undergoes necrosis after implant placement.
1mm
70
What type of bone undergoes necrosis after implant placement
cortical bone, spongy bone aroundt he cortical bone
71
How long does it take or bone to start growing after implant?
right away
72
Cause of initial bone loss with implant placement:
drilling, thermal and mechanical trauma
73
Fibrous integration leads to:
failure of implant
74
2 major causes of implant failure:
bac bw implant and bone, implant too small
75
SIze of hole in relation to size of implant:
smaller, usually 0.5mm, mechanical retention is our first
76
How to prevent bac:
OHI for implant
77
periodontitis of an implant:
Perimplantitis, leads to implant failure
78
What happens to hematoma that forms bw bone/ implant interface?
transformed to new bone through calous formation
79
Damaged bone undergoes these 3 processes;
revascularization, demineralization, reminarlization
80
Remodeling of bone begins when:
loading begins
81
Non-mineralized CT of implant failure is a kind of:
pseudoarthrosis that forms in border zone of implant
82
Durability phase, aka:
loading period
83
Strength phase, aka:
healing period
84
Stabilization phase, aka:
placement
85
drilling into bone is called:
osteotomy
86
osseointegration process takes:
allow 2-3mo
87
There is a high level of bone maturation during htis phase:
Loading period/ durability phase
88
These form and adhere to the implant surface during the stabiliazation phase:
subendosteal and subperiostical calluses
89
When is weak woven bone formed:
6wks
90
Cells that replace non-vital bone with lamellar, weight bearing bone:
osteoclasts
91
TF? Assuming implant continued success, a pt will remain in the durability phase for life.
T (check)
92
All screw shaped implants are:
root form (check)
93
Found at the Interface of healthy bone and titanium implants
titanium oxide
94
Cells in bone that face the titanium interface:
osteocytes
95
Mucoperiosteal-Implant interface:
implants establishes CT seal
96
What does the mucoperiosteal-Implant interface prevent?
the ingress of oral toxins and bacteria, initial tissue inflammation around site
97
The mucoperiosteal-Implant interface, an epi seal, is similar to:
gingival tissues and has a a sulcus
98
Tissue type of the mucoperiosteal-Implant interface:
non-keratinized, 3-4mm deep
99
thin biotype mucusa
1-2mm sulcus
100
thick biotype mucosa:
3-4 mm sulcus
101
When drilling in bone, always use this type of irrigation:
sterile saline
102
Causes of failure:
premature loading, apical migration of JE to interface, placed w too much pressure, overheating, loose
103
Healing time for Man implant
ait 3 mo
104
Healing time for maxillary anterior implant
softer bone, 4mo
| check
105
Healing time for maxillary posterior
6mo (check)
106
RPM to use for final phase of implant placement:
15-30 RPM
107
If the implant moves more than __um, it was probably due to premature loading
28
108
RPM for drill in anterior mandible:
1000 RPM
109
Mean % implant loss in Type 1-3 bone:
4%
110
Mean % implant loss in Type 4 bone:
16%, posterior maxilla
111
What does the screw screw into:
abutments
112
what is on the onther side of the screw than the abutment:
crown
113
What fits intot he implant?
abutmante
114
What does the inside of the implant look like?
post inside is hollow with thread
115
Amt o clearance needed for clearance from the occlusal plane for the implant crown:
2mm
116
of surgical stages for a tapered wall implant:
2
117
of surgical stages for a straight walled implant
1
118
List the surgical stages for tapered walled implant:
cover screw, then healing abutment
119
Cork screw and healing abutment:
Healing abutment in implant, similar diameter of implant, suture flap around abutment, will see emergence profile and embrasure spaces with 1st stage
120
Type of implant we use:
internal Hex, abutment in implant
121
Types of hex:
internal, external
122
Types of abutments:
engaging, non-engaging
123
Type of abutment required for single teeth:
engaging, does not allow for rotational movement
124
When to use non-engaging abutment:
when position does not need to be completely fixed
125
What is engaged when we say engaging abutment:
the hex
126
Go with this type of implant if implant is placed in the wrong direction:
non engaging, gives you freer range of motion
127
Types of abutments:
standard, fixed, angled, tapered, nonsegmented or UCLA
128
What type of abutment is the standard?
screw-retained crown
129
What type of abutment is the fixed?
cemented crown
130
What type of abutment is the angled?
cement or screw-retained crown
131
What type of abutment is the tapered:
screw-retained crown
132
What type of abutment is the nonsegmented or UCLA:
screw
133
inclination of a tooth that can be fixed with a non-engaging abutment:
30' (check)
134
1 reason why %#8 and 9 are so hard to restore;
must preserve incisal papilla, black triangle, won't grow back
135
MD dimesion requred to restore 8:
6-7mm
136
How to visuallze needed angulation of teeth:
whte stripe material on wax up to do RG template, appears RGO, take cephalometric
137
Color of surgical template:
clear
138
What is the surgical guide?
Clear rg guide w a hole in the occlusal surface to direct surgeon
139
Endoseos implant materials;
titanum, HA (tribasic calcium phosphate), glass ceramic
140
subperiosteal implant material:
Co-Cr-Mo
141
Brittle endoseous material:
glass sercamis
142
Material that can be used for implants:
ti, Co-Cr-Mo, HA (Tribasic calcium phosphate), glass ceramic, zirconium, polymeric materials
143
Adv of Ti as implant material;
biocompatible, corrosion resistant, light weight, low density, low modulus, high tensile strength
144
If a metal is corrosion resistant it will form:
oxide layer (check) Ti, does
145
CPT sf:
commercially pure titanium
146
Grades of CPT:
1-4
147
What is the difference in grades of Ti?
ultimate tensile strength and amt of oxygen and iron
148
WHich has higher tensile strength, CPT or CP4 ot Ti-6AL-4V?
Ti (240MPa, 550MPa, 930 MPa)
