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  1. Gopinath D, Waki SI, Cheah KF, Panda S
    J Oral Biol Craniofac Res, 2025;15(3):484-492.
    PMID: 40144648 DOI: 10.1016/j.jobcr.2025.03.001
    INTRODUCTION: Oral leukoplakia (OL) is a potentially malignant disorder characterized by non-scrabble white lesions that may turn into invasive carcinoma if left untreated. Few antioxidant treatments have shown promising results in the regression of lesions and prevention of their progression to carcinoma. We aim to summarize the current evidence on the effectiveness of antioxidants in the management of OL.

    MATERIALS AND METHODS: The present systematic review followed PRISMA guidelines and involved a thorough search of three scientific databases: PubMed, Scopus, and Cochrane. We used specific algorithms related to the keywords "antioxidant" and "Oral leukoplakia" to identify randomized controlled trials (RCTs) that have explored the utility of antioxidants in the management of OL. The risk of bias assessment was conducted using the Cochrane risk of bias tool (ROB 2.0), ensuring the reliability of our findings.

    RESULTS: Out of 2490 articles retrieved, only thirteen RCTs involving 1147 participants fulfilled the inclusion criteria. Lycopene was found to be the most consistently effective antioxidant, showing significant effectiveness in reducing lesion size, both in oral and topical forms. The trials incorporating other antioxidants, including vitamin A, vitamin C, β-carotene, and curcumin, demonstrated mixed results. Severe heterogeneity was detected in treatment forms, dosage, administration frequency, treatment duration, and follow-up time among all included trials.

    CONCLUSION: Lycopene may play a significant role in the non-surgical management of OL. Future research with large-scale, well-designed, randomized controlled trials with standardized dosing, delivery methods, and outcome measures is mandatory to provide more robust evidence on the available antioxidant therapy for OL.

  2. Soh WK, Cheah KF, Veettil SK, Pandiar D, Nimbalkar S, Gopinath D
    Eur J Dent, 2024 May 14.
    PMID: 38744337 DOI: 10.1055/s-0044-1782213
    Photobiomodulation therapy (PBMT) is a non-invasive and the latest form of therapy used in the treatment of non oncological diseases as well as cancers of various types and locations. The aim of this study was to systematically review and assess the efficacy of PBMT in managing oral lichen planus (OLP) compared to the interventions. A systematic review and meta-analysis were implemented according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. An electronic search using PubMed, Scopus, and Cochrane was conducted to retrieve relevant studies published until June 2023. The outcomes evaluated included the reduction in pain score and clinical severity scores (Prospero No CRD42023428626). A total of eight studies were identified for qualitative synthesis. The pooled analysis incorporating six studies revealed that there are no significant differences for both mean pain score (mean difference [MD] = 0.21, 95% confidence interval [CI] = -0.51, 0.93) as well as clinical score (MD = -0.08, 95% CI = -0.4, 0.25) between PBMT and comparison groups. Subgroup analysis based on corticosteroids as controls showed that there was no significant difference in mean reduction in pain score between PBMT and topical steroids (MD = 0.38, 95% CI = -0.54, 1.31). PBMT is as effective as other interventions in the treatment of OLP, though not superior, and can be a promising alternative treatment for cases resistant to steroids or when steroids are contraindicated. Further studies are recommended to standardize the optimal settings for the treatment of OLP.
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