Dental Score of 8 on the Russel periodontal index shows: A Irreversible terminal disease B Established destructive periodontal disease C Beginning destructive periodontal disease D Advanced destructive periodontal disease with loss of masticatory function 💡 Explanation Score of 8 on the Russel periodontal index shows: ✓ Correct Answer: D. Advanced destructive periodontal disease with loss of masticatory function