Implant Position - Prosthetic Considerations

Question 1

what are the five classes of diagnosing teeth?

Answer 1

• Class A - Good prognosis
• Class B - Fair prognosis
• Class C - Questionable prognosis
• Class D - Compromised prognosis
• Class X - Non-salvageable/Hopeless

Question 2

if you have a fair diagnosis do you keep the teeth?

Answer 2

most likely

Question 3

t/f: with questionable and compromised tooth diagnosis it is important to takin into account other considerations.

Answer 3

true

Question 4

t/f: hopless teeth are not useless teeth,

Answer 4

true

if immediately placing implant, then remove the tooth the day of.
if needing more bone height, ortho extrusion of tooth to increase bone heights.

Question 5

absolute or relative contraindication of implants?

• High dose radiation near area of implant placement
• Severe psychiatric disorders
• Patients on high levels of anticoagulants (INR > 3-3.5 ; Platelet count
< 50.000/mm 3)
• Uncontrolled diabetes
• Bone Pathology at implant site - Osteomyelitis
• MI within the last six months
• History of IV Bisphosphonate use

Answer 5

absolute

Question 6

absolute or relative contraindication of implants?

• Pathology of hard or soft tissues
• Bleeding disorders
• Low dose radiation
• Inability to maintain the implants due to mental or physical challenges (stroke,
arthritis…)
• Active periodontal disease
• Parafunctional habits
• Smoking
• Immunocompromised patients (Crohn’s disease, HIV positive, Organ transplant…)
• Osteoporosis
• Pregnancy
• Maximum mouth opening < 35mm in the anterior area
• Age: Females need to be over 18, Males over 21 (hand-wrist radiograph to verify that
growth has ended)
• DM: history of erratic control (HbA 1c of 6.5 - 7.0 is good, < 8 is acceptable)
• Poor plaque control
• Long term use of oral bisphosphonates

Answer 6

relative

Question 7

t/f: Start with the end in mind! Tooth position is the most important factor
REVERSE TREATMENT PLAN!!

Answer 7

true

Question 8

is it porsthetically or bone guided surgical planning

Answer 8

prosthetically

Question 9

With a ____ retained crown, the long axis of the implant passes through which part of the tooth?

Answer 9

incisal edge

Question 10

with ____ retained crown, the long axis is slightly adjusted B/L to allow the long axis to pass through the cingulum of the tooth

Answer 10

screw retained

Question 11

t/f:

Th e angulation of an implant may need to be adjusted (buccopalatally) to avoid perforating the labial plate of bone if there is an undercut apical (labial depression).

Answer 11

true

Question 12

What is used to cover the implant screw when placing composite in the screw hole

Answer 12

teflon

Question 13

Minimum Space for Cement Retained Restorations

Answer 13

≥7mm Implant Platform - opposing arch

Question 14

How is the minimum of > or =7 mm of space for cement retained restoration broken down with the implant parts?

Answer 14

≥2mm casting+porcelain
≥4mm abutment height
≥1mm abutment colar

Question 15

Minimum Space for Screw Retained Restorations

Answer 15

≥4mm Implant Platform - opposing arch

Question 16

Where is the favorable positioning of the screw for posterior teeth?

Answer 16

in the central fossa on the long axis of the tooth