Difference in the amount of space needed for the accommodation of the incisors and amount of space available for them is known as:

Difference in the amount of space needed for the accommodation of the incisors and amount of space available for them is known as:

A. Primate space

B. Leeway Space of Nance

C. Anthropoid space

D. Incisal liability

D. Incisal liability

Incisal liability, also known as incisor liability, describes the space discrepancy in the mixed dentition phase where the permanent incisors require more mesiodistal width (typically 7 mm in the maxillary arch and 5 mm in the mandibular arch) than the primary incisors they replace, creating a potential crowding issue that must be accommodated by factors like interdental spacing, arch perimeter changes, or leeway space. This is distinct from primate space (A, developmental space distal to the lateral incisor), leeway space of Nance (B, difference between deciduous and permanent molars/canines), and anthropoid space (C, a less common term sometimes used interchangeably with primate space in non-human primates).