Preventing Dental Caries: Understanding Tooth Susceptibility

What are the tooth surfaces least susceptible to caries? The tooth surfaces least susceptible to caries are the lingual of the mandibular arch and the occlusal of the mandibular arch. The correct options are 2 and 4.

The Role of Tooth Anatomy in Caries Susceptibility

Dental caries, commonly known as tooth decay, is a prevalent oral health issue caused by bacteria-produced acids that degrade the enamel of teeth. While all tooth surfaces are at risk of caries, some areas are more resistant due to their anatomical characteristics.

The lingual surfaces of the mandibular arch, located on the inner side of the lower teeth, are shielded from direct exposure to oral bacteria and food particles by the tongue. This protective barrier, coupled with the smoother anatomy of lingual surfaces, reduces plaque accumulation and makes them less susceptible to caries.

Similarly, the occlusal surfaces of the mandibular arch, which are the biting surfaces of the lower teeth, are relatively flat and less prone to food trapping. The simplicity of their anatomy makes it challenging for bacteria to access and colonize, contributing to their low susceptibility to caries.

Overall, the combination of protective barriers, anatomical features, and reduced plaque accumulation on the lingual and occlusal surfaces of the mandibular arch plays a significant role in making them the least susceptible to dental caries.

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