Early Bone Loss/Remodeling?

Authors

Hello. I placed an Neodent Grand Morse implant 4.3 x 10mm in a completely healthy patient. The surgery went uneventfully. The implant was placed at bone level 3 months after extraction. 3 months later. I placed a crown over a 1.5mm height TiBase. I checked up on him 6 months later. The site looks healthy, without pockets nor bleeding. I took an Xray and could see some bone loss of the first threads of the implant. Patient doesn't complain at all. Should I be worried about it? I'm guessing maybe low TiBase Height? What are your thoughts?