Abstract: An attachment for use with a device to scan a surface, for example a bony surface, the attachment comprising: a first housing portion configured to releasably secure a device comprising a camera, a second housing portion connected to the first housing portion and having a wall defining an internal region of the second housing portion and an external region of the second housing portion, and a plurality of pins slidably secured to the wall, each of the plurality of pins having a proximal end disposed in the internal region and a distal end disposed in the external region. Upon abutment of the distal end of each of the pins against a surface, the proximal end of each of the pins is configured to translate relative to the wall. When the device is secured to the first housing portion, the proximal ends of the plurality of pins are viewable by the camera.