Two‐year retrospective evaluation of monoshade universal composites in direct veneer and diastema closure restorations

Abstract

Objectives The aim of this retrospective evaluation was to assess the short‐term outcome of two monoshade universal resin composites with high chameleon effect in anterior direct veneer and diastema closure restorations, and to investigate the possible reasons for failure. Material and Methods Patients subjected to veneer and diastema closure restorations with two monoshade universal resin composites (Essentia Universal Shade; EU, GC Corp., and Omnichroma; OC, Tokuyama) operated between January 2018 and March 2019 were selected for the present retrospective evaluation. A total of 159 composite restorations (78 veneers and 81 diastema closure restorations) performed by a single operator in 44 patients (mean age: 33.6) were included in the study. Two blinded and calibrated examiners performed 1‐ and 2‐year assessments of the restorations with respect to FDI criteria, using medical/clinical history and dental photography records. Data were analyzed using Pearson Chi‐square with Continuity Correction, Fisher's Exact tests, and Cox regression (a < 0.05). Results The cumulative overall survival rates of EU and OC restorations were 94.6% (97.3% for the first year) and 88.6% (95.3% for the first year), respectively, with no significant difference from each other (p = 0.316). The cumulative overall survival rates of direct veneer and diastema closure restoration types were 90.2% (95.1% for the first year) and 92.4% (97.4% for the first year), respectively, with no significant difference (p = 0.559). The reasons for failure were evaluated as fracture of the restoration, failure in esthetic anatomical form, and color mismatch. All the failed direct veneer restorations were due to fractures (FDI score of 5.4), whereas 5 of 6 failed diastema closure restorations were due to color mismatch (FDI score of 3.4). Regarding the composite materials, there were no significant differences between the success rates of the restoration types (p = 0.442 for EU, p = 1.000 for OC). With respect to the restoration types, there were also no significant differences between the success rates of the resin‐based composites (p = 1.000 for direct veneer restorations and p = 0.228 for the diastema closure restorations). In addition, no significant difference was observed between male and female patients regarding the acceptable and unacceptable scores (p = 1.000). Conclusions The 2‐year clinical performance of the two monoshade universal composites in anterior veneer and diastema closure restorations were both considered successful and similar. Despite the lack of shade selection, both monoshade universal composites presented a successful color match. However, the diastema closure restorations might be more prone to color mismatch compared to the veneers over time, while veneer restorations presented more fractures than the diastema closure restorations. Clinical Significance Monoshade universal composites presented successful short‐term clinical outcomes regarding both function and esthetics in anterior direct veneer and diastema closure r...

The role of interface distance and underlying substrate on the color adjustment potential of single‐shade composites

“…However, the CAP may be reduced in clinical situations where the restoration is placed in the absence of a palatal wall, such as class IV cavities or diastema closure. The restoration may present a grayish aspect due to the blackness of the oral cavity affecting its final color 13 . Additionally, placing single‐shade composites on color‐altered dental substrates can compromise the restoration color match, and the manufacturers of some composites recommend using an opaquer and chromatic composite layer in this scenario.…”

“…The restoration may present a grayish aspect due to the blackness of the oral cavity affecting its final color. 13 Additionally, placing single-shade composites on coloraltered dental substrates can compromise the restoration color match, and the manufacturers of some composites recommend using an opaquer and chromatic composite layer in this scenario.…”

Accelerated versus Slow In Vitro Aging Methods and Their Impact on Universal Chromatic, Urethane-Based Composites

“…Since the polymer part of an RBC and the filler–matrix interface are the ones that are prone to hydrolytic degradation [ 14 ], the structural-colored RBCs need to be carefully analyzed from this point of view to predicting clinical performance in the absence of relevant clinical studies. So far, a 2-year clinical study was published that evaluated the performance of the structure- and pigment-induced colored universal chromatic RBCs used in anterior veneer and diastema restorations.…”

“…So far, a 2-year clinical study was published that evaluated the performance of the structure- and pigment-induced colored universal chromatic RBCs used in anterior veneer and diastema restorations. Within the limited observation time, the materials were defined as successful in terms of their clinical performance and color match [ 14 ]. When data from clinical studies are rare, one way to get closer to the clinical performance of a material is to subject it to artificial aging.…”

Effect of aging and fiber‐reinforcement on color stability, translucency, and microhardness of single‐shade resin composites versus multi‐shade resin composite

“…Chameleon effect or color adjustment potential is an esthetic property enabling the restorative material to match the substrate's color, resulting in life-like esthetics. 8,9 In other words, under the appropriate circumstances, two colors blend by shifting a resin material color toward the color of the surrounding. 10 Some nanofiller composites with color adjustment potential can transmit complicated light motions across the tooth structure, including light transmission, diffusion, and reflection.…”