Fig. 4From: Comparison of five single-file systems in the preparation of severely curved root canals: an ex vivo study Representative SEM photos of debris (× 100) and smear layer (× 5000). a debris score 1; b debris score 2; c debris score 3; d debris score 4; e smear layer score 1; f smear layer score 2; g smear layer score 3; h smear layer score 4Back to article page