Implants · single question
Primary stability of a temporary anchorage device (TAD) most relies on:
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Correct answer: C. Cortical bone thickness
Cortical bone thickness is the most critical factor for primary (initial) stability of TADs. Thin cortical bone (e.g., posterior maxilla) significantly increases immediate failure risk when the TAD is loaded. Secondary stability via osseointegration is not desired for TADs as they are temporary.