Dental During mixed dentition stage, which of the following appliance should be used as a space maintainer for missing primary molars in mandibular arch: A Distal shoe B Nance holding arch C Passive lingual arch D Removable functional acrylic 💡 Explanation During mixed dentition stage, which of the following appliance should be used as a space maintainer for missing primary molars in mandibular arch: ✓ Correct Answer: C. Passive lingual arch