Table 2.

Definitions related to minimal margin

Margin terms	Definitions
Margin size	0, 1–5, 6–10, 11–15 mm
Single close margin (<5 mm)	Margin extending less than four consecutive hour points
Multiple close margin (<5 mm)	At least two noncontinuous parts of the margin or one consecutive  margin extending for more than four consecutive hour points
The site concordance	The concordance of at least one hour point on the “round the clock”  coordination system between the minimal margin and the LTP site