Stainless steel ruler
Stainless steel ruler for measuring overjet and overbite/open bite. The ruler is available in the regular length (15 cm) or in a shorter length (5 cm). The short ruler turns out to be very useful in practice. It is easier to maneuver, without bumping the nose or chin.
There are different tools for measuring an overjet and overbite, depending on what needs to be measured.
• To measure an overjet (also called: sagittal or horizontal overbite), a ruler, a periodontal probe and the SOB measurer can be used.
• To measure an overbite (also: vertical overbite), a ruler or a periodontal probe can be used. This can be a negative overbite (which measures the space between the lower and upper incisors at rest; also called open bite) and a positive overbite (which measures the extent to which the upper incisors are placed over the lower incisors at rest). The positive overbite can be measured by first making a horizontal line with a pencil, directly below the incisal edge of the upper central incisors (this line will then appear on the labial side of the lower central incisors). Then measure the distance from the incisal edge of the lower central incisors to the set mark.
• Measuring an overjet in combination with an open bite (a negative overbite) is only possible with an SOB measurer.