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implant > implant > Flashcards

implant Flashcards

1
Q

three people who observed osseointegration

A

branemark, bothe and leventhal

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2
Q

does blade implant osseointegrate?

A

it may, but not predictable

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3
Q

what is sub periosteal and does it osseointegrate?

A

sits on top of bone, does not osseointegrate

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4
Q

original implant was what/

A

machine turned

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5
Q

roughened surface allows for what?

A

increased surface area for bone to implant contact

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6
Q

what did they measure in order to determine if roughened surface was different?

A

alkaline phosphatase, osteoclacin, PGE2, TGF beta 1

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7
Q

what does roughened surface allow?

A

increased stability through critical healing time, more stable throughout the whole process

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8
Q

additional treatment of roughened surface allows for what?

A

speed up healing process, but not overall stability. allows restoration process to happen earlier

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9
Q

zirconia formed by what process?

A

reductive chlorination resulting in ceramic zirconium oxide

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10
Q

what is thread pitch?

A

distance between threads

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11
Q

do you get connective tissue connection with implant?

A

no, but if do not pay attention to BW, body will make space through bone loss

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12
Q

what is platform switching?

A

placing a abutment that is smaller than the implant in order to reduce bone loss

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13
Q

what is platform matching?

A

having an abutment that is the same width as the implant

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14
Q

what is the weakest area in the entire implant-body abutment connection?

A

the hex

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15
Q

what are the functions of the hex?

A

retentive mechanism between implant body and abutment, effective anti-rotational element

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16
Q

screw loosening and fracture of implant more common with which type of hex?

A

esternal

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17
Q

advantages of external hex,

A

has been around longer, more ways to fix problems

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18
Q

disadvantages of external

A

screw loosening, rotational misfit, inadequate microbial seal

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19
Q

advantages of internal hex

A

less screw loosening, more seal, better joint strength, more platform switching options.

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20
Q

disadvantages of internal hex

A

less research, but seems to be good with what is available

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21
Q

crystal bone is strongest against which loading? accommodated best

A

compression

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22
Q

what is compressive forces?

A

push masses toward eachother

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23
Q

which loading is most destructive and cortical bone accommodates the worst?

A

shearing/sliding

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24
Q

diameter of implants range from what?

A

3-7mm

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25
Q

length of implants range from what?

A

8-15

26
Q

what can cause osteonecrosis of jaw?

A

bisphosphanates

27
Q

corticosteroids does what?

A

surpasses immune response, impairs wound healing, can compromise normal adrenal response to stresses.

28
Q

contraindications of treatmenr

A

chemotherapy, osteoporosis, uncontrolled diabetes

29
Q

inter arch space minimum for fixed

A

7mm

30
Q

inter arch minimum for remobavle

A

12mm

31
Q

inter proximal space for fixed

A

6mm

32
Q

inter proximal space for removable

A

A/P spread

33
Q

space needed between implants

A

3mm

34
Q

space needed between implant and tooth

A

1.5mm

35
Q

tapering occlusal scheme found in what type of patients?

A

class 2

36
Q

which occlusal scheme may result from initial formatting of basal skeletal bone

A

square

37
Q

why would you use delayed instead of immediate?

A

if you need tissue healing or bone healing

38
Q

disadvantages of immediate placement

A

morphology of socket may lead to compromised implant position. can cause recession, can be more complex

39
Q

two components of surgical guide

A

guiding cylinder- guides drill into location and orientation and contact surface- fits either on an element of patients gingiva or on the patients teeth/bone

40
Q

types of surgical guides

A

bone supported, mucosa supported and tooth supported

41
Q

explain bone supported guide

A

rests directly on bone after raising flap

42
Q

explain mucosa supported guide

A

rests on mucosa aided by fixation screws

43
Q

abutment selection affected by what

A

depth of soft tissue form implant to margin

44
Q

you need a minimum of ______mm from platform to margin to allow for gradual transition in emergence profile

A

3

45
Q

advantages of cemented crown

A

less fractures, more esthetic, familiar, easier to manipulate in posterior region, less screw loosening

46
Q

disadvantages of cement crown

A

hard to retrieve with permenent cement, risk of cement getting sub gingival, hard to evaluate implant, little resistance with small interocclusal distance

47
Q

advantages of screw retained

A

easily retrievable, crown will not fall off, low profile of retention,

48
Q

disadvantages of screw retained

A

screw loosening, compromised esthetics, greater chance of porcelain fracture, difficult to access in posterior regions

49
Q

when 2 parts are tightened together by a screw, unit is called what

A

screw joint

50
Q

forces attempting to disengage part of implant are called what

A

joint separating forces

51
Q

what force keeps implants together

A

clamping forces

52
Q

what is reversible inflammatory process in soft tissue around a functioning implant

A

peri-implant mucositis

53
Q

what is the inflammatory process affecting the tissues surrounding a functioning implant leading to resorption of the per-implant bone

A

peri-implantitis

54
Q

hybrid abutments used for what

A

cement crown

55
Q

hybrid abutment crowns used for what

A

screw retained crown

56
Q

scan post is used in replacement of what while scanning and what is the length difference?

A

ti-base. 5mm

57
Q

glazing used for what

A

preventing biofilm formation

58
Q

polished for what

A

optimal for gingival adhesion

59
Q

what two materials used for elastomeric impression

A

PVS or polyether

60
Q

impression coping in open tray stay where?

A

in impression

61
Q

impression coping in closed tray stays where

A

in implant

62
Q

implant replica is called what

A

lab analog

implant (2 decks)

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