Jaw Angle Implant and Bone Erosion?

what is the worst could happen with jaw angle implants? infection to jaw bone making it erode etc usually if it is done could it damage nerves over a long term and cause facial paralysis? im talking about silicone implants not medpor....are jaw angle implamts better screwed or put into place? usually if somone has a decent jawline will jaw implants on them give a better result as opposed to somome with a weak jawline?

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