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. 2022 Jan-Feb;15(1):9–14. doi: 10.5005/jp-journals-10005-2125

Table 5.

Plaque accumulation with stainless steel and zirconia crown at 3, 6, 9, and 12th month follow-up visit

Category Stainless steel crowns Zirconia crowns
3 M
(31)		 6M
(31)		 9M
(31)		 12M
(31)		 3M
(32)		 6M
(31)		 9M
(31)		 12M
(31)
5. Plaque index
a) No plaque 31/31(100%) 31/31(100%) 31/31(100%) 31/31(100%) 30/31(96.7%) 28/30(93.3%) 30/30(100%) 30/30(100%)
b) Plaque not seen by naked eye - - - - - - - -
c) Plaque seen by naked eye - - - - 1/31(3.2%) 2/30(6.6%) - -
NOT ASSESSED - - - - - 1/31(3.2%) 1/31(3.2%) 1/31(3.2%)