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
In natural teeth, ____ fibers attach to the teeth
Connective tissue fibers
In dental implants, there is direct bone to implant contact also known as:
osseointegration
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?
~ 2 mm
(JE + CT attachment)
In implants, epithelial cells are attached by:
Hemidesmosomes
In implants ____ are attached by hemidesmosomes
epithelial cells
T/F: In implants, collagen fibers do not insert into the implant but instead creates 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 the 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: Perpendicular
Implants: 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:
1.3-1.8mm
Once the implant is uncovered, vertical bone loss of _____ is can be seen apically to the new implant
1.5-2mm
After one year of loading, up to ____ mm of bone loss is considered biologic bone remodeling and WNL
2mm
How do we evaluate progressive bone loss with an implant?
baseline x-ray
What amount of bone loss is considered pathologic following implant placement?
greater than 2 mm
If you do not have a radiograph, how might you determine if a pathologic process is occurring?
Probing depth of greater than or equal to 6mm and BOP
A pathologic condition occurring in 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 peri implantitis?
- Inflammation
- BOP
- RBL
How much bone is adequate M-D between the teeth and implant?
1.5 mm
How much bone is adequate M-D for papilla in anterior teeth?
3-4 mm
How much bone is adequate M-D between 2 adjacent implants?
3 mm
B-L, there was a significantly 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 a abutment of a narrower diameter on the implant of a wider diameter to preserve alveolar bone levels at the crest of a 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 inward and away form the adjacent crystal bone:
Platform switching
Platform switching maintains the:
supracrestal attachment
Platform switching increases the distance of _____ from the 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:
bacteria accumulation & bone loss
A micro-gap will ultimately lead to ____ which further explains the advantages of ____.
marginal bone loss; platform switching
Implant sites with a band of ____ of keratinized tissue 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 2 mm
greater than 2 mm
