In dental implants in bone tests, which parameter indicates implant stability?

• A. Color of gingiva
• B. Mucosal thickness
• C. Occlusal wear
• D. Mobility of implant

Answer: (D)

Mobility of the implant directly reflects how firmly the device is anchored in bone. If you can move or rock the implant with a gentle push, the bone-implant interface isn’t providing enough resistance, indicating instability or potential failure. When osseointegration is solid, the implant remains immobile under functional loads, showing good primary and developing secondary stability.

Other factors like gingival color or mucosal thickness describe soft-tissue health, not how well the implant is bonded to bone, and occlusal wear relates to chewing surfaces and function rather than the fixation at the bone interface.