Maryland bridge dropped off, any suggestion if I dont want for denture, fixed bridges or implant?

i have a maryland bridges for my single upper front tooth. However, it dropped off after 3 years and on and off dropped off 3 times after I recemented at the dental clinics and each last 6-12 months. I am not a suitable candidate for the implant due to insufficient bone to support the bone at the missing location. however I do not want to cut the adjacent tooth for the fixed bridges. What should I do?

placeholder text for bug in Chrome