Case series of four complex spinal deformities: new frontiers in pre-operative planning.

Background And Aim: Osseous and medullar anomalies constitute a hard challenge for interpretation of complex vertebral deformities anatomy. To better frame these deformities three-Dimensional (3D) printing represents a new frontier in this field. The aim of this brief report is describing the use of 3D printed models for surgical planning in four complex vertebral deformity cases treatment.

Assessing 3-D Printing in Hip Replacement Surgical Planning.

Purpose: To evaluate the accuracy of 3-D printed models of the femoral head based on preoperative computed tomography (CT) images. Other goals were to compare the cartilage thickness of bony specimen to the printed models and calculate the standard deviation between 3-D printed models based on CT images and laser scan models.

Methods: This retrospective study analyzed 10 patients who underwent preoperative CT imaging and hip replacement.