Other Tendon Sheath Injury-DDFT laxity

I have a 13 year old mare that got a wire cut 10 months ago across the back of her pastern. The tendon sheath became infected and it was touch and go for several months. She was on stall rest for about 6 months with an aluminum wedge shoe with the toe cut out. Her HPA has been out of alignment since the infection, and we have been working to get it corrected. She has a slight reverse angle on XR. The vet seems to think with her tendon laxity, that we are doing all we can for her. She is comfortable at a walk, but has significant lameness at a trot. She lands heel first and then her toe hits the ground. Her heels are severely under run from the wedge and tendon laxity. Her frog is bulging and she has lost the collateral grooves. They (vet and farrier) decided to put her back in a flat shoe with rolled toe and extra support at the heels with hopes of getting her to grow more heel where she needs it. I'm not optimistic and I'm worried it will undo what little progress we have made.

My farrier seems to be at a loss on what to do for her. We've been working on her for 10 months. My only goal is to keep her sound enough to be a broodmare. I know I've provided limited info, but any suggestions?? How do you grow heel when you have tendon laxity and under run heels???

XR=Xray. The vet doesn't know where exactly the lameness is coming from, but the tendon had significant damage from the infection. Ultrasound showed several lesions, but most of the damage is in the pastern area that is difficult to visualize with ultrasound. I should clarify that the wedge shoe was a bar shoe with the toe cut out for ease of breakover. MRI would be the best diagnostic tool, but that is not an option due to the cost.

The first vet that treated her put her in glue on boots (I forget what they are called) that had removable wedges on the bottom. As the hoof grew in the boot, thats when the toe started popping off the ground and the tendon began showing laxity. We have never been able to regain the original HPA after the tendon became lax. She was good (at a walk) in the aluminum wedge bar shoe for a long time, but it has made her heels completely under run.

This X-ray is from back in November when she was in a wedge pad and bar shoe. I will get vet to email most current X-rays tomorrow. The pics are from today. We don't know where the tendon lengthening is exactly.

How much time between the x ray and the pics of the feet.

These are X-rays that were taken same day as above photos. One is before trimming when she is still wearing the open toe aluminum wedge bar shoe. The second is after the trim.

Scarring/adhesions to/of the soft tissues at and around the original lesion site could be the culprit.

When they raise the heels with wedge shoe do they do a pour in pad or a pad with impression material..you are just going for broodmare sound...thats a reachable goal I think..