. Journal of anatomy . ute canals for the tiansmission of vessels andnerves from one side of the cavity to the other. The branches of theinfraorbitals are often convej^ed in such conduits through the sinus. The walls, floor, and roof of the sinus are frequently traversed by bony Anatomy and Pathology of the Maxillary Sinus 861 canals for the transmission of vessels and nerves. The infraorbitals arecontained in a canal which sometimes hangs down into the cavity of thesinus. This I have seen very markedly several times in the antra of theanthroj)oid apes. Sometimes these little canals are incomp
. Journal of anatomy . ute canals for the tiansmission of vessels andnerves from one side of the cavity to the other. The branches of theinfraorbitals are often convej^ed in such conduits through the sinus. The walls, floor, and roof of the sinus are frequently traversed by bony Anatomy and Pathology of the Maxillary Sinus 861 canals for the transmission of vessels and nerves. The infraorbitals arecontained in a canal which sometimes hangs down into the cavity of thesinus. This I have seen very markedly several times in the antra of theanthroj)oid apes. Sometimes these little canals are incompletely coveredin by bone, and small tracts lie open, like patent drains open for inspec-tion, covered during life by mucous membrane. These septa are arrangedirrespective of tooth development; in fact, the one in the figure does notradiate outwards as the ordinary septa do. In life these septa would be difficult to distinguish from ordinary- forms,but if they were broken down during an operation they might give rise to. Fig. 6.—Holden skull. The anterior bony walls of the antra have beenremoved to show the septum. tiresome complications, especially if the torn end of a small nerve becameentangled in the crushed bone. Possibly this may explain the occasionalnervous complications following the Caldwell-Luc operation. Before leaving these septa I would suggest that the origin of the classfirst described is wholly dental, and that it is due to the persistence of theintervening partitions when the rest of the bony floor sinks down betweenthe dental roots. The sinking of the portions of the floor between theroots makes the inner plate of the alveolus, and it is reasonable that wherethis is not required the sinking should be more or less incomplete. It isalso reasonable to suppose that in cases where there is a general tendenc}^to osteogenetic activity, ridges should become septa, and, as in the described (see fig. 6), this exaggeration of the septa should be exces-sive.
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectanatomy, bookyear1867
