Dental caries remains one of the most common and challenging diseases in modern dentistry, posing significant threats to both enamel and dentin and often leading to complex restorative procedures. Traditional dental restorative materials such as composite resin, zirconia ceramic, and other synthetic alternatives have been used to treat carious lesions, but regenerative dentistry is exploring more advanced approaches to stimulate natural dentin repair. Among the most promising developments in this field is the use of corticosteroids, particularly in vital pulp therapy, which aims to preserve the health of dental pulp and prevent more invasive procedures like root canal therapy.
The Challenge of Deep Carious Lesions
Treating deep carious lesions presents a significant challenge due to the potential risk of pulp exposure and loss of vitality. Vital pulp therapy, which focuses on maintaining the vitality of dental pulp, is increasingly being recognized as a key strategy for long-term tooth preservation. The primary objective is to stimulate the formation of secondary or tertiary dentin to protect the pulp from further damage. Mineral trioxide aggregate (MTA) and calcium hydroxide have long been the primary agents for vital pulp therapy, promoting secondary dentin formation. However, these materials are not without limitations, particularly in their ability to fully regenerate inflamed pulp tissues. This has prompted researchers to explore alternative approaches, including tissue-specific stem cells and the application of bioactive materials that can facilitate more effective pulp healing.The Aspects of Tissue Engineering
Tissue engineering has recently shifted its focus towards mesenchymal stem cells (MSCs), which have demonstrated promising regenerative potential. MSCs can be sourced from various dental tissues, such as dental pulp (DPSCs), human exfoliated deciduous teeth (SHED), periodontal ligament (PDLSCs), and the apical papilla (SCAP). However, the clinical application of these cells remains limited due to challenges in obtaining sufficient numbers of stem cells and the gradual decline in their differentiation potential. For successful tissue regeneration, not only are MSCs essential, but also a suitable scaffold that mimics the natural extracellular matrix (ECM) and promotes cell growth. Bioactive molecules, including glucocorticoids like dexamethasone (DEX), have been studied for their role in enhancing the differentiation and proliferation of MSCs, leading to more efficient tissue regeneration and mineralization.Dexamethasone: A Double-Edged Sword?
Dexamethasone, a potent synthetic glucocorticoid, has been widely studied for its osteoinductive properties and its role in promoting odontogenic differentiation. In vitro studies have demonstrated that DEX can enhance the remineralization of dental pulp stem cells, supporting the formation of new dentin. Its anti-inflammatory effects also make it a potential candidate for vital pulp therapy, as it helps control inflammation and promote healing. However, the clinical use of DEX and other corticosteroids in restorative dentistry has been met with caution due to concerns about dosage and potential side effects. High concentrations of DEX can be toxic, leading to tissue necrosis and increased lipid formation. Thus, researchers are exploring ways to optimize the delivery of corticosteroids, ensuring localized and sustained release to minimize inflammation while promoting tissue regeneration.Free for members
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