The risk factors associated with dental implant according to Smith RA et all. Int J oral Maxillofac implants. 1992. A total of 104 consecutive patients treated with 313 Nobelpharma implant were s studied to determine the medical risks associated wwith dental implant. There were no increased case of implant failure rate or an increase in preoperative morbility in patients with a compromised medical status. Such as age, , sex, and concurrent use of hypoglycemic agents. So, according to him the surgery were successful and implant procedures using a variety of pain / anxiety - control agent failed to reveal any increase in anaesthetic related complications. However, the number 9f implant placed per patientspatients actually correlated. But the tooth can't be used as before to avoid breakage or rot.