Figure 1.

Presence of empty osteocyte lacunae in calvariae from wild-type and Col1a1^r/r mice. (a) Sections of calvariae from 4-week-old wild-type and Col1a1^r/r mice stained with H&E. Note some of the empty osteocyte lacunae (arrows) in the sections from the Col1a1^r/r mice; all osteocyte lacunae are filled with cells in the section shown from the wild-type mice. (b) Quantification of empty osteocyte lacunae in calvariae from 4- to 6-week-old wild-type and Col1a1^r/r mice. The number of empty lacunae per mm² standard area is shown in the left graph and the percentage of empty lacunae per total lacunae is shown in the right graph.