Lifespan of a crown is between 4 and 15 years and it’s life depends on the quality of the material, the way you take care of the crown, your overall mouth hygiene and external affects. Dental Crowns can be altered in various different ways to match your natural teeth colour and be identical to other surrounding teeth. They also reflect light like a natural teeth which can give your smile a more untouched look. Dental crowns will also work as a shield to protect your tooth underneath, resulting a safe natural tooth and gums for a long time. This type of hybrid crowns are considered best of both worlds. Metal crowns had the durability but lacked the aesthetic look. While, porcelain crowns was weaker but much more easy on the eyes. Since metal crowns created this undesirable look and people wanted a strong but viable crown for themselves, then along comes the metal fused porcelain crowns. These are both strong and aesthetically pleasing. The way it build is pretty handy. The entire crown has a metal layer base and a porcelain covering on top. The combination of different metal alloys works very well with porcelain in terms of bonding.