Explain periodontal ligament

The absence of the periodontal ligament and the presence of osseointegration instead of the gomphosis joint leads to the difference in movement under axial and lateral loads,  reduced proprioception in implants and difference in response to overload.  The transmucosal area or the soft tissue around the implant is also very different from the gingiva and connective tissue around the teeth. The absence of cementum in implants leads to the presence of parallel collagen bundles which are not inserted into the implants surface and therefore a susceptible soft tissue barrier between the periimplant bone and the oral environment