I am a young adult and am missing two molars on one side, first and second (no 3rd). I have one opinon to place a 4x8 implant in the 1st and 3x6 in the 2nd without any additonal bone grafting (had one already for first molar, after a post opt infection from first attempt at implant, we did not try second molar at this time) Another opinion I have got is to block bone graft for addl height and width and bigger implants. I am so confushed I have two more consultations to go (all oral surgeons).
Place Shorter, Smaller Dental Implants or Graft?
Doctor Answers 5
Promoted Local Answer
Short implants in molar sites
Generally speaking, short implants have high failure rate in the molar sites, especially when it is the upper ones. I am guessing you need to replace your upper molars. In this case, I highly recommend sinus lift bone augmentation and placement of wide diameter implants (5 or 6 mm) in lengths of either 13 or 15. I have been following these principles for over 15 years and have experienced no failures.
The link below with provide you with more information.
Should I get shorter smaller implants or grafting
I would err on the side of caution as shorter implants generally have a higher failure rate than longer ones. You may get even more confused the more dentist you speak with.
Shorter, Smaller Dental Implants
If it were my mouth, I would opt for the longer, wider implant whenever possible. If you seek out 3 opinions, you will probably get 3 different answers. You have to trust and believe in your dentist that will be restoring the implants to work with a qualified, experienced oral surgeon, who will give you the best advice. If you go for other opinions, they will tend to tell you what you are looking to hear.
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Board Certified Periodontist
Not all implants are created equal nor are surgeons. Sounds like you probably need a sinus lift and another attempt at implants in the back of your mouth on the top two are better then one because the bone is softer.