Limitations
The first drawback of this study is the small sample size, which can be rationalized by the fact that it was calculated using the 5% margin of error assumption. Future studies should take lower-margin errors into consideration. Other limitations may be that clinical color change may be impacted by routine toothbrushing with various kinds of toothpaste. It is advised that more research be done to assess the optical characteristics of hybrid materials at various thicknesses and under several aging procedures. A longer-term clinical investigation should confirm these clinical findings.