Abstract: Objective: To evaluate the clinical efficacy of digitally guided microscopic restoration technology, directed by the target restoration space (TRS), in the aesthetic management of diastemas in maxillary anterior teeth. Diagnosis and Treatment: A 21-year-old female patient presenting with spaced maxillary anterior teeth was selected. Preoperative analysis precisely defined the TRS. A transparent TRS tooth preparation guide was fabricated to transfer the TRS design clinically. Under the magnification of a dental operating microscope, precise depth-cut holes were prepared using the TRS guide and specific depth-indicating burs, followed by the final placement of porcelain laminate veneers. Results: The final restorations demonstrated harmonious morphology and color integration with the natural dentition, non-interfering occlusal function, excellent marginal adaptation, and stable aesthetic and biological outcomes. The integration of microscopic technology and the digital guide enabled precise, micron-level control over the tooth preparation. Conclusions: The combination of microscopic tooth preparation, TRS analysis, and digital guide guidance overcomes the visual limitations of traditional restoration methods. It provides a precise, reliable, and reproducible technical pathway for cases with complex TRS classifications, achieving predictable aesthetic rehabilitation.

Key words: target restoration space, precision aesthetic restoration, porcelain laminate veneers, microscope-assisted prosthodontics, microscopic tooth preparation