The trajectory of the pedicle screw perpendicular to the SAP (superior articular process) is consistent with the universal trajectory presented in the previous study of the entry point using computed tomography. The ideal entry point and trajectory of pedicle screw insertion have been a matter of considerable debate. We attempted to find the relationship between SAP and entry point and trajecto...

OBJECT Intraoperative imaging often does not provide adequate visualization to ensure safe placement of screws. Therefore, the authors investigated the accuracy of a freehand technique for placement of pars, pedicle, and intralaminar screws in C-2. METHODS Sixteen cadaveric specimens were instrumented freehand by 2 experienced cervical spine surgeons with either a pars or pedicle screw, and b...

abstract background: several case studies have described the use of the superficial inferior epigastric artery (siea) flap as a pedicled flap for reconstruction of upper and lower ex tremities, or a free fasciocutaneous flap when a large amount of skin coverage is required for hemifacial atrophy, breast or head and neck reconstruction. apparently, the anatomical findings of previous studies are...

A precise knowledge of the sources of the arterial and neural supply of the sternohyoid (SH), sternothyroid (STM), and superior belly of omohyoid (OM) is of value to surgeons using the infrahyoid muscles in reconstruction procedures of the head and neck. This study was designed to define the anatomical bases of the variable sources of the arterial and neural supply of these muscles. Fourteen ca...

The spleen, since antiquity, is an organ little known in its duties1,3. We conclude that all its physiological role is not known; but what is known, is that it is essential, verified through other means, by post-splenectomy sepsis for example4,5. Anatomical studies developed by Neder, AM7 and Zapala, A.26, guided by DiDio and anatomical dissections by Campos Christo2, guided by Resende Alves22,...

OBJECTIVE To develop a reproducible free-flap animal model to study the effects of irradiation on flap revascularization. DESIGN After institutional animal care and use committee review and approval, 16 Sprague-Dawley rats were subjected to either 23- or 40-Gy electron beam irradiation to their ventral abdominal wall. After a recovery period, the animals then underwent a ventral fasciocutaneo...