Quantitative Evaluation of Transtemporal and Facial Translocation Approaches to Infratemporal Fossa

ABSTRACT

Objective: To compare the extent of exposure and surgical maneuverability provided by facial translocation and transtemporal approaches for access to the infratemporal fossa and anterolateral skull base. Materials and Methods: Surgical procedures were performed on five fresh frozen adult cadavers (ten sides) with no known pathology. Facial transfacial approaches with and without a mandibulotomy and transtemporal approaches were evaluated. Objective measures were (1) the distance from the surgical plane to designated anatomic landmarks and (2) the surgical angle of exposure. Results: Distances from the surgical plane to the anatomic reference points were comparable for most of the access procedures (3 to 6 cm). The extended midfacial translocation and bilateral facial translocation approaches did, however, provide a shorter operative distance (1 to 3 cm) for access to the infratemporal fossa and contralateral structures, respectively. The transtemporal approaches facilitate a better angle of exposure (74 to 84 degrees) to the petrotemporal region, while the transfacial approaches were superior for access to the infratemporal structures. Conclusions: Based on the results, we propose a clinical algorithm for selecting a surgical approach based on the position and extent of an infratemporal or petrotemporal lesion.

KEYWORDS

Infratemporal fossa - anterior skull base - lateral skull base - Fisch Type C - facial translocation - transzygomatic approach

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