Gum Problems After Reclast Infusion

Hello All,
I am trying to find out some information for my mother. She is nealry 76 years old and wa diagnosed with "OP" about a year ago. Just recently she took Reclast, and almost immediately began having problems with her gums: sore, infected, red swollen, etc. My mother has always been very health conscience. She has always watched her weight, exercised, at least by walking, healthy foods. At 76 she still has all her own teeth, and are all in good condition. I need to know if there are others out there that have taken Reclast and have had problems with their gums. If so, was there anything that was able to be done to get rid of the gum problems?

I appreciate your help!!