Biology of dental implants Flashcards
In ____ PDL fibers attach from bone to root in multiple directions
Natural teeth
In natural teeth _____ acts as a shock absorber
periodontal ligament (PDL)
In natural teeth ______ fibers attach to the teeth
connective tissue
In dental implants there is direct bone to implant contact also known as:
osteointegration
What process occurs to sort of anchor the implant into the bone:
ankylosis
Describe peri-implant fibers:
Parallel cuff, oriented longitudinal
Previously called biologic width:
supracrestal tissue attachment
What is the measurement of the supracrestal tissue attachment (biologic width) in a natural tooth?
What components make up this measurement?
~2mm
JE + CT attachment
In implants, epithelial cells are attached via:
hemidesmosomes
In implants, ____ are attached by hemidesmosomes
epithelial cells
T/F: In implants, collagen fibers do not insert into the implant, but instead form a cuff around the implant
True
Although collagen fibers do not insert into the implant, they instead:
create a cuff around the implant
In an implant, the blood supply comes from:
terminal branches of large vessels from periosteum
In an implant is there more or less inflammatory response than in gingival tissues?
more
The blood supply to an implant contains fewer:
capillaries
Teeth vs. implants:
Attachment:
Teeth: basal lamina & hemidesmosomes
implants; basal lamina & hemidesmosomes
Teeth vs. implants:
Orientation of collagen fibers:
Teeth: perpendicaular
Implant: parallel
Teeth vs. implants:
Source of blood supply:
Teeth: Periosteum & PDL
Implants: Periosteum
Teeth vs. implants:
Biologic width:
Teeth: ~2mm
Implants: ~3mm
Depending on the implant design, the JE length ranges from:
1.3-1.8 mm
Once the implant is uncovered, vertical bone loss of _____ can be seen apically to the new implant
1.5-2.0mm
After one year of loading up to ______ mm of bone loss is considered biologic bone remodeling and WNL
2mm
How do evaluate progressive bone loss with an implant?
Baseline X-ray
What amount of bone loss is considered pathologic following implant placement?
greater than 2mm
If you do not have a radiograph how might you determine if a pathologic process is occurring?
PD of greater than or equal to 6mm and BOP
A pathologic condition occurring in the tissues around dental implants, characterized by inflammation in the peri-implant mucosa and progressive loss of supporting bone
Peri-implantitis
What are the clinical signs of perimplantitis?
- inflammation
- BOP
- RBL
How much bone mesio-distally is adequate between the teeth and implant:
1.5 mm
How much bone MD is adequate for papilla in anterior teeth:
3-4 mm
How much bone is adequate MD between two adjacent implants:
3mm
Bucco-lingually there was a significant greater resorption when the ridge width was ____ in posterior teeth
less than 2mm
It is recommended to place bone level implant:
subcrestally
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:
platform switching
In platform switching we put a _____ abutment on a _____ diameter implant to preserve alveolar bone levels
narrower; wider
Why is platform switching a thing?
it reduces peri-implant bone resorption at the one crest
shifts the inflammatory cell infiltrate inwards and away from the adjacent crystal bone:
platform switching
Platform switching maintains the:
supracrestal attachment
Platform switching increases the distance of ______ from crystal bone
implant-abutment junction
Platform switching limits possible interface of bone with:
micro movements
A micro gap with a two-part implant may be responsible for:
Bacterial accumulation & subsequent bone loss
A microgap will ultimately lead to _____ which further explains the advantages of ____
marginal bone loss; platform switching
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
less than 2mm; greater than 2mm
