Answer:
Based on the description provided, it seems you are referring to Kilmartin's Angle, which is an important concept in foot and ankle biomechanics and deformity correction.
Kilmartin's Angle is created between two lines:
1. A line that bisects the middle _____ (this line is parallel to a line that parallels the lateral border of the _____).
2. A line that bisects the axis of the 1st metatarsal.
The angle created between the 1st metatarsal bisection line and the longitudinal foot axis line approximates the appropriate position of the second ray. This angle guides the decision-making process regarding lesser metatarsal realignment and midfoot deformity correction.
The missing terms in the description are likely "phalanx" and "foot", which would make the full description more complete. But the key concept is that Kilmartin's Angle helps assess the appropriate position of the second ray and informs the surgical planning for lesser metatarsal realignment and midfoot deformity correction.