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To Order Tel: 01274 533233 . Fax: 01274 537663 . Email:
Case Assessment and
Treatment Planning
Wallis Orthodontic Arch Length Ruler
A more reliable way to measure arch length and space requirement
1.
Position the ruler over the patients model and select the most
appropriate arch form.
2.
Place on the contact point and align with the centre line
(see Fig.1,1A)
3.
Measure the arch length on each side.
Example Fig 1B = 51mm on each arch
4.
If an aim of treatment is to procline or retrocline the incisors, the
ruler can be repositioned using the mid-line millimetre rule as a guide
(See Fig.1A)
5.
Measure individual Mesio-Distal tooth widths with a digital calliper
or dividers and add them together.
The total is the actual arch length required to align the teeth.
(See Fig.2)
6.
By subtracting the measured arch length from the total tooth widths
you can determine how much space is required for alignment.
Example Fig.1
Arch Length = 51mm
Tooth Measurements = 59mm
Difference = 8mm = Space required to align the arch
O/No
8000-937
Cephalometric Protractor/Template
Unique combination of protractor and tooth template for accurate
cephalometric analysis.
Sold individually
O/No
8000-939
Tracing Template
Useful aid for treatment
planning.
Sold individually
O/No
8000-940
Tracing Film
20.3 x 24.4cm (8” x 10”)
acetate film. Provides
sharp detail when tracing
radiographs.
100 sheets
O/No
8222-204
