Why am I am experiencing pain, pressure and a loose feeling of distal crown of implant bridge?

Had an orthodontic bracket placed on my implant bridge 16 mo agoThe front teeth that have braces on have lifted. I've had these braces on for 16 months. The orthodontist has used implants on both sides of my braces as anchors. The proximal side of implant bridge was used as anchor. I am wondering if this process has loosened the implant that is giving me pain, pressure and loose feeling?

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