CLINICAL CASE #021: ENGINEERING RESTORATION
Contact Point Restoration (Class II) | Teeth 2.3, 2.4
1. CLINICAL SITUATION
- Location: Upper left arch, Canine (2.3) and First Premolar (2.4).
- Defect Type: Class II (Black) on proximal surfaces.
- Task: Anatomical reconstruction of the contact point and marginal seal.
- Registry Note: This case demonstrates the performance of the Quickmat™ system in the frontal-lateral transition zone (2.3–2.4), where contact geometry requires precise control of matrix curvature.
2. RSBC PROTOCOL (Step-by-Step)
- R (Rubberdam): Isolation of the operative field using the NicTone™ system. Stability is ensured with Tor VM™ clamps. The use of a medium-grade sheet guarantees the absence of sulcular fluid and respiratory moisture in the bonding zone.
- S (Sandblasting): Kinetic substrate preparation ($Al_2O_3$, 27 $\mu m$, 2.0 bar). Micro-abrasive treatment is aimed at removing the “smear layer,” desquamating defective tissues, and activating enamel prisms to enhance micromechanical retention.
- B (Bonding): Adhesive stage using Kerr Optibond FL™:
- Total-Etch: Etching with 37% Phosphoric Acid (enamel/dentin).
- Infiltration: Active scrubbing of primer and filled adhesive (4th generation).
- IDS (Immediate Dentin Sealing): Immediate sealing of the dentin creates a reliable biological barrier and increases bond strength.
- C (Composite): Biomechanical reconstruction. Restoration of the proximal wall using the matrix system, followed by incremental layering of the occlusal morphology.
3. ACCESSORIES SPECIFICATION (POLYDENTIA KIT)
A specialized tandem of Polydentia tools was utilized to achieve precise contact density:
| Instrument | Reference (REF) | Functional Role |
| Quickmat™ Sectional Matrices | REF 5705 | Anatomical contouring of the proximal walls |
| myRing Forte™ Separation Ring | REF 6816 | Separation force to ensure tight contact points |
| myWedge™ Interdental Wedges | REF 7102 | Plastic adaptation and cervical margin sealing |
4. ENGINEERING BUILD-UP
- Mechanics: Utilization of the myRing Forte™ separation ring for controlled opening of the interproximal space.
- Adaptation: Positioning of myWedge™ to prevent the formation of overhangs in the critical cervical zone.
5. TECHNICAL VERIFICATION
- Video Protocol: #8KDCV – 8K Dental Clinical Video.
- Format: 8K HDR.
- Operator: Alexander Apokin
- Location / Date: Moscow, 2023.
Finally, I’ve managed to create a highly informative description of the clinical case. Please leave your comments; your opinion on the work is very important to me. The original video has been uploaded to the educational system at https://rubberdamology.com/course/polydentia-applied-expert-video-guide-module-2/