Space Analysis

Question 1

How can you work space out?

Answer 1

• Visualisation
• Brass wire technique
• Relfex microscope
• Scanning program

Question 2

Visualisation

Answer 2

• Count up overlap of each tooth (minus any area of spacing e.g. between lower 1s.
• Very unreliable and most common method used.
• It’s overestimate crowding

Question 3

Brass wire technique

Answer 3

• Cut piece of brass wire to best fit arch form from distal of 6’s.
• Add up mediocre- distal widths of each tooth from 6-6 with caliper.
• Take the sum widths away from length of a brass wire to give you how many mm crowding there is.
• Best to carried out on study model
• Tome consuming
• Underestimate crowding

Question 4

Relfex microscop

Answer 4

• A computer program linked to microscope accurately estimates crowding
• Very accurate
• Expensive equipment
• Time consuming
• Not practical in real world

Question 5

Scanning programmes

Answer 5

• Rapidly growing area of dentistry
• Improving in accuracy speed and cost.
• Linked with computer programmes which can estimate amount of crowding

Question 6

Which one is best technique to measure crowding?

Answer 6

• Brass wire

Question 7

Scale of crowding

Answer 7

• Mild - 0-4
• Mod 4-8
• Sever more than 8

Question 8

Royal London space planning ? Space requirements implication ?

Answer 8

• Crowding / spacing
• Levelling curve of spee
• Arch expansion
• Incisor A-P position
• Angulation of teeth
• Inclination of teeth

Once you add up space requirement and space creation the total should be zero

Question 9

Royal London space analysis conclusion

Answer 9

• Very rigid and formal way
• time consuming
• most orthodontist learn to this in their head with experiences

Question 10

When do we extract 4s not 5s ?

Answer 10

• More crowding 4s
• Less crowding 5s

Question 11

When do we extract 5s ?

Answer 11

• Lower in Proclined after tb phase because they don’t want to Retroclined incisor again
• less crowding case