A SIMPLE METHOD TO ESTIMATE THE ORBITAL FLOOR LINEAR LENGTH IN ADULTS

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Background. The orbital floor (OrF) and infraorbital rim (IOR) repair in cases of complete destruction is challenging mainly due to the fact that the defect length cannot be measured. Aim. The aim of the current study is to develop a method of calculating the Orf linear length by using the gender and the linear lengths of the medial, superior and lateral orbital walls (OrW) of the same orbit. Material and Methods. Ninety-seven (59 male and 38 female) European adult dry skulls were classified according to age: 20-39, 40-59 and 60 years and above. The linear length of each OrW was measured by using the direct distance between the optic foramen and a landmark in each orbital rim. Results and Discussion. A side asymmetry was detected for the linear lengths of the inferior, superior and medial OrW. A gender dimorphism was detected, but no correlation with the age was found. Using the Stepwise multiple regression analysis two formulas were developed, one for the right and one for the left OrF with coefficient of determination R2 0.43 and 0.57, respectively. Conclusions. The proposed formulas represent a simple, applicable and individualized method to calculate the OrF linear length in cases of complete destruction of the IOR and OrF, with accuracy and without the use of expertise material.