Statement of the problem:~Chemotherapy and radiation therapy may cause changes in the lining of the mouth and the salivary glands. This can upset the healthy balance of bacteria. These changes may lead to mouth sores, infections, and tooth decay.~Rationale:~Patients under chemotherapy treatment and radiotherapy are systemically compromised and undergo hospital manipulations and residency, increasing their caries risk, fear, and anxiety. That's why they need specific caries preventive protocols designed for high-risk patients. Atraumatic restorative treatment (ART) is recommended for these patients to decrease pain and anxiety.~Atraumatic restorative treatment (ART) and interim therapeutic restoration (ITR) have had increased interest in the past few years. ART and ITR are comparative approaches and are performed utilizing the same material, but they contrast within the reason of their utilize. ART is very effective as a restorative technique since it is more conservative than conventional treatment. Also in this technique, we avoid using rotary equipment and dental anaesthesia, which increase anxiety during the dental procedure. ITR, on the other hand, is used as a temporary restoration that will be replaced with a more definitive one.~Injectable flowable Giomer composites are a material used for direct filling techniques has been developed over the past years. It has the property of Giomer technology that is able to release and recharge fluoride and other beneficial ions for the life of the restoration and induce remineralization of the underlying hard dental tissues. Injectable flowable Giomer composite (Beautiful flow plus x) has a long-term clinical performance like conventional composite., it also aids in decreasing acid production and formation of an antiacid resistant layer, helps in the reduction of tooth mineral solubility also has a high survival rate and wear resistance in high stress-bearing areas in posterior teeth.~Beautiful Flow Plus X also helps to remineralise the tooth structure for sustainable caries prevention and easily polishes for long-lasting lustre
Aim of the Study:~This study will compare between injectable flowable composite (Beautifil flow plus x) and high viscosity glass ionomer (Equia Fil) by ART caries preventive protocol in high caries risk patients receiving chemotherapy and/or radiotherapy