DMSO cured my brother's frozen shoulder. I don't know if he had calcium buildup in his shoulder or not, but he later did have an artery clogged up with calcium, and had a stent put in for that, so it seems like calcium buildup could have been a factor.
He told me that his shoulder had been bothering him for 3 or 4 years, and that his doctor told him it was frozen, and there wasn't much they could do for it. I offered some DMSO to him, and jokingly told him to go rub some on, and his shoulder would likely be healed, by the time he left.
He rubbed some liquid 99% DMSO that I had bought at Tractor Supply, on his shoulder, morning and evening, for a couple of days, and he told me that his shoulder felt like new, after only a couple of days of the DMSO treatment.
Later, he told me that he had to put some on, for a couple of days, a few weeks after the initial treatment, but he told me that his shoulder felt like it did, when he was 18. He was in his mid-50's, when this happened.
I do believe his doctors had told him that he had some nerve damage, which was causing his frozen shoulder, but whatever the cause, DMSO healed it, and, last I heard, it is still fine, today.
I told this story to a 70-something gentleman, who also had frozen shoulder and also told me that he had nerve damage, so he tried DMSO, and it worked for him, too.
I don't know the details, as to how long it took, but several months later, I talked to someone who talked to the man in question, and he told that person that his shoulder was now fine. So, DMSO might do the trick.