Thank you for sharing your photos and concerns about your forehead scar. It is not readily apparent if your scar gets deeper appearance with your facial expressions or relatively static. That being said, your options would be best properly determined after well conducted consultative evaluation. Hands on physical examination might determine if subcision of the scar is an essential starting point before consideration of other subsequent treatments.You might be a candidate for neurotoxin injection (Xeomin, dysport or Botox), volume restoration with fillers (Juvederm, Restylane or Revanesse), or micro fat grafting volume restoration. Wishing you the best result in your search for remedy.
You really have several options to address this mid face volume loss. In addition to HA fillers like Voluma and Restylane Lyft, you might want to consider fat grafting. Fat grafting done properly is arguably a great alternative for longevity. Bottom line is that you are in good place with many options.
CT scan radiation has no biological effects on Botulinum toxins (Botox). Radiesse filler is a biostimulant dermal filler that consist of calcium hydroxyapatite which can be seen with CT imaging, however there is no evidence to support ionizing effects of the minuscule fleeting radiation from one time CT scanning. You do not need to be concerned about the immediate or longer term effects of CT radiation to your Botox or Radiesse filler injections.
Firstly, I would like to concur with your dermatological surgeon that your situation is time-limited and will most likely resolve itself within 10-12 days post-treatment. Secondly, it might be useful to point out that this midface filler application is a deep injection technique to the overlying bone tissue called periosteum which might get partially penetrated with resultant deposition of the HA filler or cause a tiny amount of sub-periosteum bleeding. This would produce the hard texture that you have described. Again, this would resolve quite readily in a few days. Cannula application might be a better alternative injection technique to needle for the avoidance of this concern.
