Implant partially in Sinus: Best solution?

Implant at 26 was placed intentionally at an angle. The crestal platform for the mentioned implant was the only area that was wide enough to accommodate an implant. Mesial to this platform the ridge would be reduced to 2-3mm thickness. I know I should have angled the implant more, not to enter the sinus. However I am considering to leave the implant where it is, since I achieved a nice 40 N/cm2 primary stability. What do you think? Please share your thoughts and experiences.


18 Comments on Implant partially in Sinus: Best solution?

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Dr Tim Miller BS, DICOI
1/15/2016
When you were creating the osteotomy did you feel the drill "fall" into the sinus (lose all resistance suddenly)? The sinus is sloped and often you have more bone than it appears. Gotta see a pt, more latter
CRS
1/16/2016
It is in the anterior wall acceptable placement. Watch the healing should be fine.
Dr Schiavone
1/18/2016
If might be just fine. Leave it alone for awhile. If it integrates and remains asymptomatic, then restore the case.
Reg O'Neill
1/19/2016
What is your treatment plan for this case? and is the mandible being treated as well? What options did you offer your patient? No doubt your implant at 26 is more at risk with some exposure to the maxillary sinus and if infected we can imagine what the scenarios could be. If you do lose this implant for any reason what would your plan be? I am a little confused with your case description, but am I correct in thinking that the ridge dimension mesial to your 26 implant is only 2-3mm? Sorry for more questions than answers but primary stability (gained here through two cortical plates so should be sound enough) is only one factor innvolved in treatment planning
Dr K Toa
1/19/2016
Hi Reg, thank you for your comment. The treatment plan for the lower jaw is beyond the scope of this post. I'd rather leave the focus on this implant. My plan B, if the implant at 26 fails for any reason, would be sinus lift and re-implant. Yes the ridge diameter mesial to this implant is 2-3mm.
E Mellati
1/19/2016
If patient has no acute and prolonged sinus-related signs/symptoms you can wait and monitor. The implant appears faily long. I guess you could have chosen a shorter implant to avoid this. BTW, is the severe perio problem at lower teeth under control?
Dr K Toa
1/19/2016
Shorter implant would be overloaded due to the long span(not seen on OPG). In the lower jaw most teeth will be removed, leaving only right side molars and premolars, which is under perioTx.
Gregori Kurtzman, DDS, MA
1/19/2016
What is your prosthetic plan? if this it to be a full arch fixed on these 6 implants you wont be able to extend the right side back very far due to the cantilever will be too long in a high load area. that last implant on right should have been placed further back so it was over the area where the 1st and 2nd molars contact each other.
Dr K Toa
1/19/2016
Hybrid on 6 . Pt doesn't wish sinus lift, if it can be helped. I'll extend to a small 16.
Richard Hughes, DDS, FAAI
1/19/2016
I don't see any problem. The bone will probably grow up the implant 2-4 mm.
Dr.Ali hossein Mesgarzade
1/19/2016
Dear Dr. I think during driling you should aware about perforation of sinus bony structure by sence of falling into a hollow space.In this situation you should check the perforation of sinus floor and schniderian membrane by nose blowing. In case of positive nose blowing test you should change the place of osteotomy to the more safer place.But if there is no sinus membran ( schinderian ) damage and perforation it is a good idea to put your implant with shorter size or the preplaned size moreover in this case it is recommended to use hand instrument for implant placement like rachet instead of using rotary handpice.it helps you to have more tactile sense than machine to stop in optimal length and elevate schniderian membran with minimal damage. Best Regards Dr.Ali hossein Mesgarzadeh Oral and Maxillofacial surgeon Tabriz university of medical sciences Tabriz / Iran
Dr K Toa
1/20/2016
Thank you Dr. I did not have any falling sensation, while drilling, as the bone was quite dense(D1-D2). I even had to keep putting pressure while drilling. Therefore, I wasn't aware of the situation until after the surgery. If I had felt the perforation, I would have re-direct the implant. Many thanks
Dr.Mehran Shokri
1/20/2016
Hi Dr. Leave the implant where it is and just follow it. If: 1- the implant is integrated 2- sinus is asymptomatic 3- your patient knows what happened and has no dispute Go ahead for restoration. Trust me , sinus has incredible nobility. Dr. Mehran Shokri Oral&maxillofacial surgeon Fellowship in advanced implant surgery Iran
Dr K Toa
1/20/2016
Thank you Dr
Dr. Foram
1/20/2016
Shouldnt be a cbct done for better 3d view than 2d opg. So that a clear idea of sinus perforation can be seen. As per what you said that you didnt feel that fall in sinus.
Dr. Rob Wolanski
1/21/2016
All great comments. As well as the feel of the drill ,I check the osteotomy for solid bone in all dimentsions, laterally as well as apically and always chart this. You will sleep better at night if you do this routinely. It is much more accurate thatn trying to interperet a two dimensional Panograph.I agree that a CT would be usefull here, and that the sinus is a rather resiliant bit of anatomy. There are many successful implants that are partially in the sinus and functioning just fine. The engagement of the anterior cortical plate can actually be an advantage. The membrane can grow over the implants as long as it is not infected but do not cout on this. It is just a fortunate fact.
Dr sukkar
1/25/2016
Hi Dr K Yoa , i feel that implant is not in the sinus specially you felt resistance during the drilling , actually there is superimposition between the implant ( which is slight bucally located ) and the anterior wall of the sinus ( which is palatally located ) due to the panoramic view is 2D x-ray .
Bill M
10/13/2017
I'm surprised that your response to the treatment plan is that 'it is beyond the scope of this post'. Considering what is going on with the occlusion ,supereruption. and perio on the lower you may have dug a hole that will be expensive to dig out. Any time you place implants the treatment plan must involve the whole system. You have a myriad of problems coming your way if you don't step back and consider the forces you are creating-the bugs that are left to infect the implants, the re-constuction that will occur once you do decide to do the lower. Stop now and get the plan for the lower and save you and your patient energy expenditures. I could be more blunt but you must consider what is going on on the lower. Good Luck

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