PMC3226601_01
Minor chipping of the anterior zirconia prosthesis on tooth 11.
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From a clinical point of view, the lowest scores were obtained in the aesthetic category and were related particularly to the anatomical form of the crowns and the existence of some minor chipping (Figure 2).
Poor gingival response at the 1-year follow-up.
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Relatively low scores were also obtained in regards to the biological properties (for the sub-categories of periodontal response and adjacent mucosa) as more than half of the crowns received only sufficient/satisfactory scores (Figure 3).