@de9g
The most important thing I believe for you to look at is how much longer/ over calcified the one side is than the other non symptomatic side (unless you have an extremely rare case of both sides being elongated and symptomatic). But yes from what i have read i dont know how yours could be 60mm. This in my opinion is a miss measurement/calculation by whoever analyzed the scans. They may have noted at 60mm the length of the tendons/ligaments that attach to the stylo process connecting it to the top and bottom of the jaw.
These tendons/ligaments cause most of us with Eagle Syndrome to have jawline toothaches in the 3rd-5th molar range that seem underneath the teeth themselves. This is because the tendons/ligaments attach there on our jawbone below/above our teeth and eventually become strained and act abnormally due to the irregularity in the stylo 's length/over-calcification.Thus these tendons and ligaments begin to abnormally pull or put pressure on the jawline in the area usually associated with the 3rd, 4th, and 5th molars. The stylo process is the anchor point for these tendons which I believe controls a large portion of our Jaw movement (mainly lateral movement i believe)

Sorry to rabbit trail on you de9g but maybe this
Info will be useful to all of those making and paying for dentist appointments and not finding anything wrong.