Implants

Question 1

Straumann Sizes

Answer 1

Diameter - 2.9, 3.3, 4.1, 4.8

Length - 8, 10, 12, 14, 16, 18 (10-14 for 2.9)

Question 2

Straumann material / surface treatment

Answer 2

15% zirconium, 85% titanium
SLActive surface - produced with 0.25 - 0.5 conrundum grit 5 bar sandblasting and acid-etching, but they are rinsed under nitrogen protection to prevent exposure to air and then stored in a sealed glass tube containing isotonic NaCl solution

Question 3

Straumann pitch / internal

Answer 3

Thread pitch = 0.8mm

internal connection = 115 degree conical-cylindrical connection with four internal grooves

Question 4

Straumann drill sizes / protocol

Answer 4

2.2mm - 800rpm
2.8mm - 600rpm
3.5mm - 500rpm
4.2mm - 400rpm
Profile Drill - 300rpm
Tap - 15rpm
Four markings = 0.2mm per 90 degree rotation of implant
Drill tip is 0.4mm longer than insertion depth

Question 5

Implant anatomical distances

Answer 5

Mental foramen - 5mm anterior (due to anterior loop)
Inferior alveolar nerve - 2mm superior
Esthetic free gingival margin - 3mm apical
Interproximal contact to crest of bone:
3mm - 100%
4mm - 100%
5mm - 98%
6mm - 56%
7mm - 27%

Question 6

Implant restorative distances

Answer 6

Cement retained - 8mm
Screw retained - 6mm
Bar attachment - 12-14mm
Locator - 8.5mm (vertical) and 9mm (buccal-lingual)
Denture interarch space - 10-12mm total

Question 7

AP Spread

Answer 7

Line drawn between the distal of the most posterior implants and the center of the most anterior implants
Ideally 1cm with 4-5 implants
Cantilever extension is 1.5 the AP spread