Aim: To evaluate detail reproduction by an intraoral scanner (IOS) and model scan for three types of finish lines. Materials and methods: Thirty patients requiring tooth-borne single crowns and bridges were divided into three groups (A, B, and C) based on finish line location: supragingival (A), equigingival (B), and subgingival (C). Gingival retraction cord was used for groups B and C. Doctor-validated preparations and finish lines. Intraoral scans were conducted with a 3Shape scanner, rescanning postcord removal. Impressions were made with Aquasil material and poured with Pearlstone gypsum. Finish lines were verified and scanned for analysis. STL data were evaluated with 3D Paint software. Reproducibility was visually assessed. The Mann–Whitney U test was applied for statistical analysis (p < 0.05) at a 95% confidence interval. Results: A statistically significant difference was noted in detail reproduction by IOS and model scan for supragingival and equigingival finish lines (groups A and B) (p < 0.05). No significant difference was observed for subgingival finish lines (group C) (p > 0.05). Conclusion: The IOS demonstrates superior reproducibility over conventional impressions for supragingival and equigingival finish lines. Gingival retraction cord techniques enhance reproducibility for both equigingival and subgingival finish lines. Notably, both techniques exhibit comparable performance in reproducing detailed subgingival finish lines. Clinical significance: Integrating IOSs into routine prosthodontic practice provides substantial clinical advantages, especially for impressions with supragingival and equigingival finish lines. However, the proper use of gingival retraction techniques is crucial for achieving optimal results.