ABSTRACT Introduction This in vitro study evaluated how different forces applied to the dental drill handle during static computer‐assisted implant surgery influence surgical guide deformation and implant placement accuracy. Methods Twenty‐four virtual implants were divided into six groups (0–10 N, in 2 N increments). Surgical guides were scanned under loaded conditions, and deviations were quantified by superimposition with the baseline model. Results At high forces (≥ 8 N), buccal and palatal deformations increased markedly, with the 10 N group showing the largest displacement and angular deviation. Apical deviations (up to 1.554 mm) exceeded platform deviations (0.720 mm), and angular changes reached 9.595°. Under low forces (2–4 N), deformations were minimal, and anterior regions showed greater stability than posterior regions. Conclusion Forces above 6 N approach or exceed clinically acceptable thresholds, while 0 to 4 N produced the most precise outcomes. A single overload (≥ 8 N) can jeopardize surgical precision and long‐term implant stability, underscoring the importance of controlling drill handle force. Clinicians are therefore advised to limit applied forces to ≤ 4 N to preserve surgical accuracy and minimize guide distortion.
Chu et al. (Mon,) studied this question.
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