I don't mean to be blunt or dismissive, but the pressure in the veins/arteries has nothing to do with (a) the thickness/elasticity of the wall tissue, (b) the diameter of the arteries/veins, or (c) the number of (branches of) arteries/veins.
This can either be caused by a more prominent maxilla (upper jaw) or a retruded mandible (lower jaw further back than it should be). This causes a discrepancy in how all teeth contact, and can manifest as an increased overjet. An increased overjet can also be caused by a discrepancy in the number of teeth, or the length of the arch.
Although the cause is unknown, Musk also announced that the failure might be related to a problem with the Falcon 9 upper stage. since the first stage engines were still firing as planned. âThere was an overpressure event in the upper stage liquid oxygen tank. Data suggests counterintuitive cause,â tweeted Musk. SpaceX Falcon 9 rocket and Dragon resupply spaceship streaking skywards until explosion about 2 minutes after liftoff from Cape Canaveral Air Force Station in Florida on June 28, 2015.