PMC7641717_01
Surgical procedure: (a) sinus debridement through the created window; (b) insertion of the Foley catheter balloon into the sinus; (c) membrane placement over the window and the bony defect; (d) flap placement and suturing.
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fig1
The normal mucous membrane was left intact, whereas the diseased sinus membrane was debrided with curettes (Figure 1(a)). The balloon was then inflated with 10 ml of sterile saline (Figure 1(b)). Both the oroantral window and OAF were covered with the collagen membrane (Figure 1(c)). The flap was repositioned and closed with 4/0 polypropylene sutures (Figure 1(d)).
Panoramic radiograph: (a) preoperative radiograph showing bony defect at the postextraction site of tooth 2.6 and failing tooth 2.5; (b) radiograph taken 3 months after surgery showing bone repair; (c) radiograph taken at 8-year follow-up showing the stability of bone volume and absence of any pathological lesions.
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fig2
A significant increase in volume and density of bone at the surgical site is shown in a series of consecutive radiographs (Figure 2).