Categories of this blog are

Tooth vital – tooth necrotic

# teeth with MB2 present- able to cleanse and shape the MB2 – MB2 join
MB1 – teeth I consider calcified that no MB2 was found – total # of 1st
molar treated

MB2 distance from MB1 – join MB1

5-5=10

9-7-3-0-10

less than 1 mm — ??

Could not get down MB2 and further exploration with it so close to MB1 and likely joining wasn’t worth the risk.
Completed in Wheaton.  First photo is  CaOH. Second is final fill