60% Permanent Crown Ceramic Resin (Highly Filled Oxide Ceramic Composite Resin) Introduction

I. Material Definition

60% Permanent Crown Ceramic Resins are light-cured composites filled with nano-inorganic ceramics (≈60%), typically consisting of: high hardness ceramic micropowders (e.g. zirconia/silica/nano-ceramics), a durable light-cured resin matrix, and a high refractive index stabiliser with a cross-linking ester system.

Core objective: to provide a ‘transitional permanent restoration performance’ close to that between temporary crowns and partial long-term crowns, and to meet the dentist's standards for long-term use in terms of strength, toughness, aesthetics and predictability.

Core features of the material (why choose 60% filler)

2.1 Strength: close to PMMA, better than ordinary 3D printing resin

Flexural strength: 120-150 MPa

Modulus of elasticity: > 4 GPa

Surface structure is closer to ceramic composite material, stable performance of clinical cracking

→ Can be used for medium- and long-term temporary crowns, short-term permanent crowns, chairside emergency restorations. 2.

2.2 Wear-resistant experience due to high ceramic content, surface wear resistance is significantly higher than 20-40% filler resin

After polishing, it can maintain stable luster and is not easy to be grey → It is not easy to wear the occlusal surface in the long term and does not deform rapidly. 3.

2.3 Significantly improved thermal stability

The heat distortion temperature (HDT) can reach more than 100°C, and will not be deformed due to changes in oral temperature.

→ Can be worn for a long time and does not need to be replaced frequently. 4.

2.4 Aesthetic effect close to PMMA and nano-composite resin, moderate transmittance (non-highly translucent material, but natural colour), can be deployed A1-A3, BL series of colours, after polishing, the luster can be up to Ra < 0.2 μm

→ The finished crowns have a natural colour and the visual effect is very close to that of traditional composite resin crowns.

Applicable scenarios (core values)

3.1 Long-term temporary crowns (12-60 months)

For: long implantation cycles, gingival contouring management, multiple rounds of adjustments at the design stage

→ Stability and abrasion resistance are significantly better than that of ordinary temporary crown resins.

3.2 Short-term permanent crowns

For: elderly patients, clinics with limited restorative cycle schedules for patients with high occlusal pressure

→ offers a ‘cost-effective permanent restoration’ between PMMA and porcelain. 3.

3. 3 Rapid chair-side restorations and aesthetic restoration

Rapid restoration of occlusal surfaces, cuspids and anterior teeth, directly printed, polished on site and ready to wear → saves the number of follow-up visits to the lower and upper jaws and is highly efficient in terms of output. 4. Multi-unit short bridges

3.4 Multi-unit short bridges

Can be used for 1-2 unit short bridges with normal occlusal pressure → Widen the boundary of the use of resin crowns.

Advantages of 60% ceramic resin

4.1 Optimisation of powder particle size distribution (D50 = 0.2-0.8 μm), high filler without settling, balanced light-curing depth and strength → the key to high-precision printing.

4.2 Anti-yellowing system

Add oxidation inhibitor + UV absorber, keep 6-12 months without significant aging

→ Suitable for long-term temporary crown market demand.

4.3 Highly dense structure, thanks to the ceramic particles and resin matrix settling technology, the structure is more dense after curing: not easy to absorb water, not easy to deform, not easy to stain

→ maintain long-term clinical stability.

V. Printing and post-processing:

5.1 Suitable for 385nm / 405nm projection light source

5.2 It is recommended to print with 50-100 μm slices to enhance the details of occlusal surfaces.

5.3 Cleaning: IPA or special cleaning solution for resin.

5.4 Secondary curing: 405nm bright light for 5-10 minutes.

5.5 Polishing: Resin-specific paste, rubber wheel, compatible with conventional PMMA polishing systems.

Important: Highly filled materials are inherently harder and maintain their lustre longer after polishing.