Can we sue a dentist for improper dental implants?

My father decided to get dental implants instead of getting dentures 4 years ago. He spent $23, 000 on the implants and has had problems ever since. First he had horrible breath and the dentist had to readjust something because it left a pocket for debris. Second the tooth the implant was anchored to started moving. When my father questioned the dentist, he said he would have to cut the screw out of his gums, it was my father’s choice. My father decided not to cut out the screw thinking it was a choice. 6 months later, the tooth fractured and the implant came out. He went back to the dentist very upset and the dentist had the audacity to be angry with my father. He said he hadn’t come in for cleanings and these things can happen. He was reluctant to give the implant back to us and quoted the repair at $3,500. My father went to my dentist and received a completely different story. My dentist told my father the implant was not set up correctly. He used one anchor for 4 teeth, instead of doing it individually. If he wanted to use one anchor he would have had to use a locking technique called a rear facing cantilever where the “C” locked into the “T” so it would be flexible. My dentist said it was inevitable that the tooth would fracture on the setup the dentist did, and it was an amateur’s mistake. He said he has never seen this procedure used from a practicing dentist in America. The consulting dentist stated for the amount of money my father spent, he should not have used the 1 anchor to 4 teeth as it is a cheaper type of implant. He said cleanings would not have attributed to the fracture and the dentist should have known how to fix the problem without cutting the screw out of his mouth. My dentist is charging my father $4,200 (for a different technique) and insisted to make sure the first dentist pays for everything. We have requested medical records so my father can have his teeth fixed; the dentist hasn’t denied our request but wants to know why we need them.