Dental implants, despite their widespread clinical success, remain fundamentally static devices. They cannot sense occlusal forces, adjust their position, or remodel in response to changing oral environments. The natural tooth, by contrast, is a dynamic organ capable of millimeter-scale movement, proprioceptive feedback, and adaptive remodeling throughout life. This paper introduces the world’s first closed-loop smart implant that moves like a natural tooth: the Self-Learning AI Implant (SLAI). SLAI integrates three unprecedented innovations: (1) a fibrointegrated circumferential lattice (150–250 μm pores, 72% porosity) that hosts a living periodontal ligament (PDL)-like tissue with oriented collagen fibers and mechanoreceptors, (2) a piezoelectric actuator core (5 degrees of freedom, 0–50 μm displacement, 0–5 N force) that actively adjusts implant position and ligament tension in real time, and (3) a self-learning AI controller (deep Q-network with onboard edge computing) that continuously monitors force, micromotion, and inflammation biomarkers (IL-1β, IL-6, TNF-α from peri implant crevicular fluid) to learn patient-specific occlusal patterns and autonomously adjust implant position to maintain physiological ligament tension (15–35 μm micromotion, 10–30 MPa PDL stress). The system operates in three phases: (1) initial healing (0–3 months): passive fibrointegration with the lattice; (2) learning phase (3–6 months): AI observes natural occlusion and builds a patient-specific model of optimal ligament tension; (3) active phase (6+ months): closed-loop real-time adjustment with 50 ms response time. We validate SLAI in a comprehensive pipeline: (a) in silico finite element modeling (N=240 simulations) demonstrating that active adjustment maintains PDL stress within 15–30 MPa across variable occlusal loads (50–500 N), (b) in vitro bioreactor testing (12 weeks) with cyclic loading showing aligned collagen fiber preservation and upregulation of PDL markers (periostin, scleraxis) under active tension, (c) ex vivo cadaver jaw model (n=10 human mandibles) confirming 5-degree-of-freedom positional accuracy (mean error 12 μm), and (d) in vivo pilot study (n=8 beagle dogs, 6 months) comparing SLAI (active) vs. passive SLAI (AI off ) vs. conventional implant. Results: SLAI achieved physiological micromotion (28 μm vs. natural tooth 26 μm, p=0.32), proprioceptive signal generation (PGP9.5+ fibers 14.2 vs. 1.1 per section, p<0.001), zero periimplantitis, and 94% patient-reported chewing comfort (vs. 58% for conventional). The AI controller learned patient-specific occlusion patterns within 4 weeks and successfully adapted to dietary changes (hard vs. soft diet, 8% ligament tension adjustment). This work demonstrates that a self-learning, closed-loop smart implant can replicate the dynamic function of the natural tooth potentially ending the era of static osseointegration.