Firstly, in terms of materials, full ceramic teeth are mainly composed of ceramic materials without metal crowns. This material allows full ceramic teeth to have a more natural appearance, with high transparency and refractivity, which can well simulate the gloss and texture of real teeth. In contrast, porcelain fused to metal teeth are coated with ceramic materials on a metal crown, thus containing metal components. The metal crown may affect the aesthetics of the porcelain fused to metal teeth, such as causing gingival discoloration, and may also interfere with MRI examination.
Secondly, in terms of hardness, both full ceramic teeth and porcelain fused to metal teeth have certain hardness, which can resist wear and tear in daily life. However, due to the metal crown of porcelain fused to metal teeth, its hardness may be higher. Nevertheless, this difference in hardness does not necessarily mean that porcelain fused to metal teeth are superior to full ceramic teeth in all cases. For example, in the anterior tooth area where high aesthetic restoration is required, full ceramic teeth have more advantages due to their better transparency and color stability.
In terms of application scope, full ceramic teeth are mostly used for restoration in the anterior tooth area due to their excellent aesthetics, especially suitable for patients who have high aesthetic requirements. On the other hand, porcelain fused to metal teeth are more suitable for posterior tooth restoration or cases that require greater biting force due to their higher hardness and wear resistance.
Finally, from the perspective of biocompatibility, full ceramic teeth, which do not contain metal components, are non-irritating to the gums, do not cause allergic reactions, and have good biocompatibility. This makes full ceramic teeth more advantageous in maintaining oral health. In contrast, the metal components in porcelain fused to metal teeth may cause allergic reactions or gingival inflammation in some patients.
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