It is only neccessary in implant surgery to the upper jaw if one or a few conditions are met.
1) your jaw bone may have been damaged....
2) there is resorption due to tooth loss and not enough bone to place the implant
3) you may have bone loss due to periodontitis...
Normally patients will wait 4-10 months for implants after a sinus lift. If you are looking to get dental implants click on the link to learn more. If you are looking for a dental implant dentist in Queens then you can learn more here....
Sinus lifts are normally done by a periodontist or an oral surgeon....