Biology of dental implants

Question 1

In ____ PDL fibers attach from bone to root in multiple directions

Answer 1

Natural teeth

Question 2

In natural teeth _____ acts as a shock absorber

Answer 2

periodontal ligament (PDL)

Question 3

In natural teeth ______ fibers attach to the teeth

Answer 3

connective tissue

Question 4

In dental implants there is direct bone to implant contact also known as:

Answer 4

osteointegration

Question 5

What process occurs to sort of anchor the implant into the bone:

Answer 5

ankylosis

Question 6

Describe peri-implant fibers:

Answer 6

Parallel cuff, oriented longitudinal

Question 7

Previously called biologic width:

Answer 7

supracrestal tissue attachment

Question 8

What is the measurement of the supracrestal tissue attachment (biologic width) in a natural tooth?

What components make up this measurement?

Answer 8

~2mm

JE + CT attachment

Question 9

In implants, epithelial cells are attached via:

Answer 9

hemidesmosomes

Question 10

In implants, ____ are attached by hemidesmosomes

Answer 10

epithelial cells

Question 11

T/F: In implants, collagen fibers do not insert into the implant, but instead form a cuff around the implant

Answer 11

True

Question 12

Although collagen fibers do not insert into the implant, they instead:

Answer 12

create a cuff around the implant

Question 13

In an implant, the blood supply comes from:

Answer 13

terminal branches of large vessels from periosteum

Question 14

In an implant is there more or less inflammatory response than in gingival tissues?

Answer 14

more

Question 15

The blood supply to an implant contains fewer:

Answer 15

capillaries

Question 16

Teeth vs. implants:

Attachment:

Answer 16

Teeth: basal lamina & hemidesmosomes

implants; basal lamina & hemidesmosomes

Question 17

Teeth vs. implants:

Orientation of collagen fibers:

Answer 17

Teeth: perpendicaular

Implant: parallel

Question 18

Teeth vs. implants:

Source of blood supply:

Answer 18

Teeth: Periosteum & PDL

Implants: Periosteum

Question 19

Teeth vs. implants:

Biologic width:

Answer 19

Teeth: ~2mm

Implants: ~3mm

Question 20

Depending on the implant design, the JE length ranges from:

Answer 20

1.3-1.8 mm

Question 21

Once the implant is uncovered, vertical bone loss of _____ can be seen apically to the new implant

Answer 21

1.5-2.0mm

Question 22

After one year of loading up to ______ mm of bone loss is considered biologic bone remodeling and WNL

Answer 22

2mm

Question 23

How do evaluate progressive bone loss with an implant?

Answer 23

Baseline X-ray

Question 24

What amount of bone loss is considered pathologic following implant placement?

Answer 24

greater than 2mm

Question 25

If you do not have a radiograph how might you determine if a pathologic process is occurring?

Answer 25

PD of greater than or equal to 6mm and BOP

Question 26

A pathologic condition occurring in the tissues around dental implants, characterized by inflammation in the peri-implant mucosa and progressive loss of supporting bone

Answer 26

Peri-implantitis

Question 27

What are the clinical signs of perimplantitis?

Answer 27

1. inflammation 2. BOP 3. RBL

Question 28

How much bone mesio-distally is adequate between the teeth and implant:

Answer 28

1.5 mm

Question 29

How much bone MD is adequate for papilla in anterior teeth:

Answer 29

3-4 mm

Question 30

How much bone is adequate MD between two adjacent implants:

Answer 30

3mm

Question 31

Bucco-lingually there was a significant greater resorption when the ridge width was ____ in posterior teeth

Answer 31

less than 2mm

Question 32

It is recommended to place bone level implant:

Answer 32

subcrestally

Question 33

Concept of placing an abutment of a narrower diameter on the implant of a wider diameter to preserve alveolar bone levels at the crest of the dental implant:

Answer 33

platform switching

Question 34

In platform switching we put a _____ abutment on a _____ diameter implant to preserve alveolar bone levels

Answer 34

narrower; wider

Question 35

Why is platform switching a thing?

Answer 35

it reduces peri-implant bone resorption at the one crest

Question 36

shifts the inflammatory cell infiltrate inwards and away from the adjacent crystal bone:

Answer 36

platform switching

Question 37

Platform switching maintains the:

Answer 37

supracrestal attachment

Question 38

Platform switching increases the distance of ______ from crystal bone

Answer 38

implant-abutment junction

Question 39

Platform switching limits possible interface of bone with:

Answer 39

micro movements

Question 40

A micro gap with a two-part implant may be responsible for:

Answer 40

Bacterial accumulation & subsequent bone loss

Question 41

A microgap will ultimately lead to _____ which further explains the advantages of ____

Answer 41

marginal bone loss; platform switching

Question 42

Implants site with a band of ____ of keratinized tissues were shown to be more prone to brushing discomfort, plaque accumulation, and peri-implant soft tissue inflammation when compared to implant sites with ______ mm of keratinized tissue

Answer 42

less than 2mm; greater than 2mm