Which of the following do not contribute to arch stability ?
Correct answer: C. Embrasures
- A. Cusps
- B. Root forms
- C. Embrasures
- D. Periodontal fibers
Explanation
Cuspal interlocking, favourable root forms and periodontal fibres all help resist tooth displacement and support arch stability. Embrasures mainly provide spillways for food and space for the interdental papilla, so they are the best answer here.
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