# Etching depth after 30 sec for orthodontic bracket with orthophosphoric acid is _____ ? with Answer - Dental Materials | TestPrep

> Solved MCQ: Etching depth after 30 sec for orthodontic bracket with orthophosphoric acid is _____ ? Correct Answer: A. 10 um – 20 um. Verified answer explanation for FPSC, PPSC, MDCAT, NTS, and CSS competitive exam preparation.

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# Etching depth after 30 sec for orthodontic bracket with orthophosphoric acid is _____ ?

Direct Answer & Quick Reference

The correct option is **A. 10 um – 20 um**.

A. 10 um – 20 um **(Correct Answer)**

B. 3 um – 9 um

C. 50 um – 110 um

D. 200 um – 250 um

✨ Explain with AI

Verified Key: A. 10 um – 20 um
Solved by 4,501+ students

Verified against official examination board answer keys and standard curriculum textbooks.

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*Source: https://test-prep.blog/mcq/etching-depth-after-30-sec-for-orthodontic-bracket-with-orthophosphoric-acid-is_-432a4ae2-e210-4279-a110-59a5ccb30ba3*
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