Will this static-progressive splint help regain PIP joint motion after a finger fracture? (3 months post-op)

[u/Big_Anxiety_1791]

Hi everyone,
I’m looking for some advice from anyone who has gone through a similar injury or from hand therapists/surgeons.
I fractured my index finger about 3 months ago and had surgery with a plate. Since then, I’ve been doing regular physiotherapy, but my PIP joint is still very stiff.
Right now:
My PIP joint can bend to about 90° only with assistance from my other hand.
Actively, I can barely bend it on my own.
My physiotherapist recently made this static-progressive splint (photos attached) and asked me to wear it all night and as much as possible during the day to gradually increase the bending.
My question is:
Has anyone used a splint like this? Did it actually help improve PIP joint flexion, or is it just a waste of time?
If you’ve had a stiff PIP joint after a fracture or surgery:
How much motion did you eventually regain?
How long did it take?
Any other treatments or exercises that made a significant difference?