1208 Silent Sinus Syndrome: Systematic Literature Review and Report of Case Treated with A Customised PEEK Orbital Floor Implant

Abstract

Abstract Aim Silent sinus syndrome is a rare condition characterised by progressive, painless enophthalmos with subsequent development of hypoglobus due to orbital floor resorption. It is caused by hypoplasia of the ipsilateral maxillary sinus due to atelectasis. It may be associated with previous orbital floor surgery or trauma or may be idiopathic. We describe the case of a 33-year-old female treated with a customised orbital floor implant, and a review of the condition from available literature. Method A total of 53 patients with a diagnosis of silent sinus syndrome reported in 7 different papers from 2003-2020 were compared in age, presenting signs and symptoms, radiographic findings and the types of treatment provided. Results The patients ranged from ages 19 to 91, with an average age of 45.1 years, and a male to female split of 29:24. The most common presenting sign was progressive unilateral enophthalmos, usually in the absence of any ocular symptoms. Treatments included endoscopic maxillary antroscopy, orbital floor repair (prefabricated or customised) and septoplasty. Conclusions Silent sinus syndrome typically presents with unilateral enophthalmos which is often painless and not associated with any visual disturbance. It possesses characteristic clinical and radiographic signs. The management of choice is surgical and does not tend to recur in the years immediately following resolving treatment. Since the advent of 3D printing, accurate customised orbital plates can now be designed to correct the hypoglobus which is a major aesthetic component when it presents in this condition.