A Comparison of the Discoloration Potential for EndoSequence Bioceramic Root Repair Material Fast Set Putty and ProRoot MTA in Human Teeth: An In Vitro Study.

OBJECTIVE: To compare the discoloration potential of Endosequence Bioceramic Root Repair Material fast set putty (ERRMF) and ProRoot MTA (PMTA) when placed coronally in human extracted teeth over a 4-month period.

METHODOLOGY: Forty-eight premolars were sectioned 2 mm below the cementoenamel junction. The pulp chambers were cleaned chemo-mechanically. The specimens were randomly assigned to three groups: PMTA, ERRMF, and no fill (control). Tooth color was measured spectrophotometrically at six time points: after material placement, after 2, 4, 8, 12, and 16 weeks. Data were transformed into Commission Internationale de l'éclairage (CIE) L*a*b* system and color difference values (ΔΕ) were calculated. Specimen images were recorded for each time point. Three random specimens from experimental groups were sectioned longitudinally and examined under a stereomicroscope. For data analyses, we used one-way analysis of variance with repeated measurements and Tukey's test (α = 0.05).

RESULTS: At 2 weeks, the ΔE means did not differ significantly between the groups. At 4, 8, 12, and 16 weeks, PMTA group exhibited a significantly higher ΔE compared with the ERRMF and control groups. The ΔE did not differ significantly between the ERRMF and control groups. Teeth restored using PMTA exhibited a visually progressive dark discoloration. The control and ERRMF group specimens exhibited color stability. Sections of PMTA specimens revealed grayish discoloration of the material with dark dentinal staining that was not visible in the ERRMF specimens.

CONCLUSION: Teeth restored using PMTA exhibited progressive discoloration, whereas teeth restored with ERRMF maintained color stability over a 4-month period.

CLINICAL SIGNIFICANCE: The results found in the present study suggest that PMTA produces tooth discoloration over time, whereas ERRMF does not induce tooth discoloration. Therefore, ERRMF might be an alternative to PMTA, especially for coronal restoration in aesthetic zone teeth. (J Esthet Restor Dent 29:59-67, 2017).