Microscope-Assisted Class I Molar Composite Restoration with Tokuyama Estelite Sigma Quick and Lucida Polish Protocol: A Biomimetic Approach
Abstract (≈480 characters)
This case demonstrates a minimal-invasive Class I composite restoration performed under magnification using Tokuyama Estelite Sigma Quick. A biomimetic layering strategy was combined with the Lucida Polish system (Style Italiano) to reproduce natural gloss and enamel texture. The workflow emphasizes adhesion, anatomical precision, and long-term esthetic integration in posterior restorations.
Author CV
Dr Hamza Zahid, BDS
Microscopic Restorative & Cosmetic Dentist
CEO – Dr Hamza Dental Center, Lahore (Pakistan)
Focus Areas – Biomimetic Posterior Restorations | Microscope Dentistry | Adhesive Protocols | Esthetic Rehabilitation
Clinical Workflow
1️⃣ Diagnosis & Preparation
A mandibular first molar presented with localized occlusal caries (Fig 1). Under rubber-dam isolation, conservative cavity preparation was done, preserving pericervical dentin and enamel ridges. The cavity outline followed the carious extension only, minimizing healthy tissue removal.
2️⃣ Adhesive Protocol
Selective enamel etching with 37 % phosphoric acid (15 s) was followed by a universal adhesive (3M Scotchbond Universal) applied actively for 20 s, air-thinned, and light-cured (Fig 2). This ensured optimal micro-retention and hybrid-layer formation.
3️⃣ Layering & Build-Up
A base layer of Tokuyama Estelite Sigma Quick (A2 shade) was placed in 2 mm oblique increments, each sculpted to mimic natural fissure anatomy. Oblique layering minimized polymerization stress and maximized marginal adaptation (Fig 3).
4️⃣ Anatomical Sculpting
Using a fine brush and thin spatula, cusp inclinations and secondary grooves were sculpted pre-cure, replicating natural occlusal morphology. The final increment was light-cured for 40 s per surface under glycerin gel to eliminate the oxygen-inhibition layer (Fig 4).
5️⃣ Finishing and Polishing (Lucida System)
Finishing was performed with Sof-Lex XT discs and fine-grit burs to refine contour and fissures. Final gloss and enamel texture were achieved using the Lucida Polish System (Style Italiano)—consisting of a diamond-impregnated rubber cup and Lucida Paste (Fig 5).
The result reproduced natural micro-texture and enamel gloss without over-polishing.
6️⃣ Post-Operative Evaluation
The restoration demonstrated seamless shade integration, accurate occlusal contacts, and enamel-like optical properties (Fig 6). The patient reported excellent comfort and immediate esthetic satisfaction.
Outcome
Combining Tokuyama Estelite Sigma Quick with the Lucida Polish System provided a biomimetic, highly esthetic, and time-efficient Class I restoration. The microscope-guided approach ensured precise adhesion, natural morphology, and long-term surface stability.
Image Captions
- Fig 1: Pre-operative occlusal caries on molar.
- Fig 2: Cavity after caries removal and selective etching.
- Fig 3: Incremental layering of Tokuyama composite.
- Fig 4: Anatomical sculpting before final curing.
- Fig 5: Lucida Polish System application.
- Fig 6: Final restoration showing enamel-like gloss.
Bibliographic References
- Dietschi D. Layering Concept in Composite Restorations for a Natural Aesthetic Result. Pract Periodontics Aesthet Dent 1997; 9(2): 127–138.
- Magne P, Belser UC. Adhesive Restorations and Biomimetic Dentistry. Quintessence Publ 2002.
- van Dijken JWV et al. Durability of Posterior Nanohybrid Composites. Dent Mater 2015; 31(5): 545–554.
- Style Italiano Team. Lucida Polish Protocol: Achieving Fast High-Gloss Finishing. Style Italiano Clinical Tips, 2020.
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