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Implant Lit Fall 2021 > What are Implants - Indications/Contraindications > Flashcards

What are Implants - Indications/Contraindications Flashcards

1
Q

What is biologically guided implant therapy?

A

Restorative factors should be secondary to biologic tx plan which emphasize conservation and preservation

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2
Q

What is the impact of biologic design on peri-implant disease?

A

Saleh
Prosthesis is significantly intertwined with biologic response of peri-implant supporting tissues

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3
Q

Implant survival Maxilla vs Mandible

A

Adell (Branemark) 1981
Maxilla: 81%
Mandible: 91%

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4
Q

Definition of Success

A

Albrektsson 1986
No peri-implant radiolucency
RBL <0.2mm/year after remodeling (1yr)
No signs of infection/inflammation

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5
Q

Definition of Osseointegration

A

direct bone-to-implant interface without interposition of bone tissue

During this process, primary stability becomes substituted for secondary stability

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6
Q

What is Primary/Secondary stability and how to they progress?

A

Raghavendra 2005

dog study -

Primary - mechanical interlock at time of implant placement (25-45N/cm^2)

Secondary - deposition of new bone (osseointegration) - BIC ~60%

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7
Q

When is the weakest point of implant integration?

A

Raghavendra 2005

2.5wks - ~30%

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8
Q

What is the platform switching concept?

A

Lazzara 2006

Increased Soft Tissue Thickness

Implant-Abutment interface away from bone

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9
Q

Subtractive methods for surface modification?

A

Sandblasted

Acid Etched

Laser ablation

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10
Q

Additive methods for surface modification

A

Plasma spray

Anodization

Hydroxyapatite coating

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11
Q

What roughness is optimal for BIC?

A

Albrektsson 2004

1-2µm (moderately rough)

Majority of commercially available

rough surface may be associated with higher risk of PI

“BioActive surface coatings” (HA) - chemical bond with living tissues

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12
Q

What are the Platform/Diameter options of Zimmer implants?

A
  1. 5/3.7
  2. 5/4.1
  3. 5/4.7
  4. 7/6.0
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13
Q

Tissue level straumann machined height

A

Standard: 2.8mm

Standard plus: 1.8mm

Tapered Effect: 1.8

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14
Q

Straumann options

A

Tissue Level:

Standard

Standard Plus

Tapered Effect

Bone Level:

Bone Level

Bone Level Tapered

Zr:

Pure

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15
Q

How long do you wait after Stage II before Crown Fabrication (impression)?

A

3-4 weeks

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16
Q

What is another indication for Implants other than tooth replacement?

A

Facilitate movement of teeth (TADs)

Singh et al. 2010

17
Q

CONTRAINDICATIONS FOR IMPLANTS

A

Debby & Wang 2006

Recent MI (wait 6-12mo)
Valvular Prosthesis Surg (wait 6-12mo)
Immunosuppression (need WBC >1500-3000cell/mm^3 - PMN >1000cell/mm^3)
Bleeding conditions (need INR _<_3 - platelet >50k)
Active tx of malignancy w/ Rx or Chemo
Before skeletal growth is complete

Implant Lit Fall 2021 (4 decks)

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