Agreement Between Artificial Intelligence-Based and Expert Consensus Implant Planning Using Cone-Beam Computed Tomography: A Retrospective Observational Study

Introduction: Artificial intelligence (AI) is increasingly being incorporated into digital implant dentistry, but the quantitative validation of AI-generated implant plans against expert consensus remains limited.Therefore, this study aimed to evaluate the agreement between an AI-based implant planning system and an expert consensus plan using cone-beam computed tomography (CBCT) images of posterior edentulous sites.Materials and methods: This cross-sectional, observational study included 50 posterior edentulous sites from 50 adult patients.Two experienced implantologists independently planned implant length, diameter, mesiodistal position, and angulation, and a consensus plan was established as the reference standard.The same datasets were analyzed using an AI-based implant planning system.Agreement was assessed using the intraclass correlation coefficient (ICC), mean absolute error (MAE), Bland-Altman analysis, Cohen's kappa, and predefined clinical tolerance limits.Results: Categorical agreement was 86% for implant length, 90% for diameter, 84% for position, and 88% for angulation.The ICC values were 0.91 (95% CI, 0.85-0.95)for length, 0.87 (0.78-0.92) for diameter, 0.85 (0.75-0.91) for position, and 0.80 (0.68-0.88) for angulation.The mean differences between AI and consensus were 0.1 mm for length, 0.1 mm for diameter, -0.1 mm for position, and 0.7 o for angulation; none were statistically significant (all p > 0.05).Clinically acceptable agreement was observed in 94%, 90%, 88%, and 82% of cases, respectively.Conclusion: AI-based implant planning demonstrated good-to-excellent agreement with expert consensus planning across implant dimensions and three-dimensional positioning parameters.The findings indicate substantial concordance between AI-generated and expert-derived planning recommendations under the conditions evaluated.However, agreement with expert planning should not be interpreted as evidence of clinical or surgical accuracy.Prospective validation against actual postoperative implant positions is required to determine clinical accuracy.