Which of the following statements about cementum is accurate?

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Cementum has its minimum thickness at the cemento-enamel junction, measuring 20-50μm.The greatest thickness of cementum is found near the root apex, ranging from 150-200μm.Cementum completely encircles the apical foramen.All the above statements are correct.

Explanation

Option A is correct because cementum is thinnest at the cemento-enamel junction, typically 20-50μm thick. Option B is true as cementum reaches its maximum thickness near the root apex, about 150-200μm. Option C is accurate since the apical foramen is enclosed by cementum. Therefore, all the statements listed are true.