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Implants > Biology of Dental Implants > Flashcards

Biology of Dental Implants Flashcards

1
Q

How does the PDL work in natural teeth?

A
  • Periodontal fibers attach from bone to root in multiple directions
  • Periodontal Ligament act as shock absorber
  • Connective tissue fibers attach to teeth
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2
Q

How is the dental implant attached since it is not the PDL?

A
  • Direct bone to implant contact (osseointegration)
  • Ankylosis
  • Peri-implant fibers parallel cuff, oriented longitudinal
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3
Q

Supracrestal tissue (Biological Width) attachment length is…

A

~2 mm

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4
Q

Epithelial cells attached to implant by…

A

hemidesmosomes

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5
Q

Collagen fibers do not insert into the implant but creates a _____ around the implant

A

cuff

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6
Q

How is the implant blood supply different than natural teeth?

A

Implants have..
* Blood supply by terminal branches of large vessels from periosteum.
* More inflammatory response than gingival tissues
* Fewer Capillaries

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7
Q

Natural teeth have..
Attachment -
Orientation of collagen fibers -
Source of blood supply -
Biological width -

A

Attachment - Basal Lamina and hemidesmosomes
Orientation of collagen fibers - Perpendicular
Source of blood supply - Periosteum and PDL
Biological width - ~2

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8
Q

Implants have…
Attachment -
Orientation of collagen fibers -
Source of blood supply -
Biological width -

A

Attachment - Basal Lamina and hemidesmosomes
Orientation of collagen fibers - Parallel
Source of blood supply - Periosteum
Biological width - ~3

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9
Q

JE Length in implants is ___ mm (depends on the implant design).

A

1.3 to 1.8

PDs may very based on implant design (and brand)

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10
Q

**Bone Remodeling: Physiologic **

Once the implant is uncovered, vertical bone loss of ____ mm is evidenced apical to newly established implant-abutment interface.

After one year of Loading, up to ___ mm of bone loss is considered biologic bone remodeling and WNL

A

1.5 to 2
2

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11
Q

Bone Remodeling: Pathologic

Baseline X-ray to evaluate progressive Bone Loss >= _____ after the first of function is pathologic

If you do not have a radiograph? PDs >= _____
and BOP is pathologic

A

2mm
6mm

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12
Q

What is peri implantitis?

A

a pathological condition occurring in tissues around dental implants, characterized by inflammation in the peri-implant mucosa and progressive loss of supporting bone. Clinical sign of inflammation is detected by bleeding on probings, while progressive bone loss is identified on radiographs

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13
Q

How much bone is adequate on the mesio-distal of an implant?

    • at least ____ mm between teeth and implant
    • ____ mm for papilla in anterior teeth
    • ____ mm between 2 adjacent implants
A

1.5
3-4
3

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14
Q

How much bone is adequate on the bucco-lingual (anterior zone) of an implant?

  • As bone thickness approached ____ mm, bone loss decreased significantly and some evidence of bone gain was seen
A

1.8 - 2

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15
Q

How much bone is adequate on the bucco-lingual (posteriors) of an implant?

  • non linear correlation between buccal ridge width and the resorption
  • _____ threshold established to account for non linearity . Significantly greater resorption when the ridge width < ____
  • At least _____ buccal and lingual needed.
A

2 mm, 2 mm
1 mm

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16
Q

It is recommended to place a bone level implant ______

A

subcrestally

17
Q

What is platform switching?

A

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 a dental implant

18
Q

Why is platform switching important?

A

It reduces peri-implant bone resorption at the one crest:
-Shifts the inflammatory cell infiltrate inward and away from the adjacent crystal bone
-Maintains the supracrestal attachment
-Increases distance of implant-abutment junction from the crystal bone
-limits possible interface of bone with micro-movements

19
Q

Is it better to use 2-part implants or 1-piece?

A

2-piece is better!

(a) Modern endosseous two-piece implant design comprising the implant and a screw-retained abutment (better!!!)
(b) Modern one-piece implant with integral abutment

20
Q

The influence of Microgap at two-part
implants
* Inflammatory cell infiltrate was consistently present at the level of the interface between the two components, the bone crest was consistently located ___ mm apical of the microgap.
* Inflammatory Infiltrate was due to bacterial contamination
* Placement of two-part implants at different levels in relation to the bone crest resulted in different amounts of bone loss.

A

1-1.5

21
Q

The ____ influences bone remodeling

A

Microgap

22
Q

Implant sites with a band of ____ of KT were shown to be more prone to brushing discomfort, plaque accumulation, and peri-implant soft tissue inflammation when compared to implant sites with ____ of KT.

A

<2 mm
>2 mm

Implants (15 decks)

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