Performing crestal sinus floor elevation with collagen sponge simultaneously with implant placement may hesitate in endosinus bone gain limited to the height of the implant apex, because the Schneiderian membrane
might collapse on it , as demonstrated by the mesial implant.
The sinus bone wall was detached and the Schneiderian membrane
was carefully elevated.
The bone was removed and the schneiderian membrane
was exposed and elevated from bone.
Damage to the bony vessel can cause bleeding, may obscure the physician's line of sight, and may lead to perforation of the Schneiderian membrane
, all of which prolong the operation and assessment of the sinus membrane reflection.
The ectodermally derived epithelium that lines these ingrowths forms the schneiderian membrane
. The fundus of these pits eventually meets the rostral end of the developing endodermlined pharynx.
The second set of tips with blunt edges makes it possible to obtain a very precise cut but was specifically designed to be less aggressive and more delicate so that it could be used in the more accurate phases of the osteotomy, avoiding the risk of damaging delicate anatomical structures such as Schneiderian membrane
or inferior alveolar nerve.
In contrast, the other three types are derived from the schneiderian membrane
; their origins are different from the origins of the membranes that line the remainder of the respiratory tract.
A perforation of inferior alveolar bone of the right sinus was discovered during the procedure but the schneiderian membrane
of internal space was still preserved and not torn.
The air pressure in the maxillary sinus is similar and the Schneiderian membrane
lining is the same in rabbits and humans, and rabbits are both easy to care for and inexpensive [23, 24].