Table 7 Existing crowns affected by caries or marginal gap that received replacement crowns

From: Reasons for placement and replacement of crowns in general dental practice

Number of surfaces affected by caries/marginal gap n (%) Distribution of surfaces affected by caries/marginal gap n (%) Size of caries/marginal gap n (%) Principal reason why repair would not have been possible n (%)
1 63 (69) Buccal 43 (33) Less than width of an explorer 7 (8) Marginal defect too large 63 (26)
2 21 (23) Distal 26 (20) Width of an explorer 18 (20) Repair unlikely to meet needs/expectations of the patient 63 (26)
3 3 (3) Mesial 23 (17) Width of a William's probe 12 (13) Crown lost 32 (13)
4 0 (0) Occlusal/Incisal 22 (17) Width of a BPE probe tip 10 (11) Shape/shade of crown flawed 23 (10)
5 1 (1) Labial/Palatal 3 (2) Greater than the width of a BPE probe tip 39 (41)
Data not reported 4 (4) Data not reported 15 (11) Data not reported 6 (7) Data not reported 60 (24)
Total 92 (100) Total 134 (100) Total 92 (100) Total 241 (100)