EFFECT OF RESIN INFILTRATION ON ARTIFICIALLY DEMINERALIZED ENAMEL: AN IN VITRO STUDY
Main Article Content
Abstract
Background: White spot lesions, the earliest sign of enamel demineralization, appear as chalky, opaque white spots on the tooth surface without cavitation and can occur in both primary and permanent dentition. Resin infiltration has been proposed as a treatment solution for white spot lesions and early-stage caries. Objectives: This study aimed to evaluate the effects of resin infiltration on color, surface hardness and penetration depth in artificially demineralized enamel lesions. Materials and Methods: This in vitro study was conducted on 30 extracted premolars. Each tooth was split into two halves, resulting in 30 buccal and 30 lingual enamel samples. Samples were analyzed for color changes using the CIELab color system, surface hardness using the Vickers hardness tester, and for both lesion depth and resin penetration depth using scanning electron microscopy (SEM). Measurements were recorded at three time points: baseline (T0), post-artificial demineralization (T1), and post-resin infiltration treatment (T2). Results: The color difference ΔE between the demineralized enamel and baseline enamel, the infiltrated enamel and baseline enamel and the infiltrated enamel compared to the demineralized enamel were all significantly higher than acceptability threshold of ΔE = 3,7. Vickers surface hardness values after treatment were significantly higher in the group treated with repeated resin applications following the manufacturer's instructions, compared to the single application group and to the initial baseline values. The penetration depth was significantly lower than the lesion depth. Conclusions: The ΔE values between the infiltrated enamel and the baseline color were significantly higher than the acceptability threshold, indicating that the post-treatment tooth color may not fully match the surrounding healthy enamel according to clinical standards. The Vickers surface hardness following treatment in accordance with the manufacturer's instructions is significantly greater than the hardness prior to demineralization. The depth of resin infiltration was significantly less than the depth of demineralization.
Article Details
Keywords
resin infiltration, white spot lesion
References

2. Nguyễn Phương Huyền, Trần Anh Tuấn. Phương pháp điều trị thâm nhập nhựa ở bệnh nhân kém khoáng hóa răng hàm lớn và răng cửa (MIH): Báo cáo trường hợp. Tạp chí Y học Việt Nam. 2023;526(1B):341-345.

3. Đàm Minh Tuân, Hoàng Việt Hải. Nhận xét khả năng xâm nhập của Icon vào tổn thương sâu răng sớm trên thực nghiệm sử dụng kính hiển vi điện tử quét. Tạp chí Y học Thực hành. 2016;12:52-54.

4. Borges A, Caneppele T, Masterson D, Maia L. Is resin infiltration an effective esthetic treatment for enamel development defects and white spot lesions? A systematic review. Journal of Dentistry. 2017;56:11-18.

5. de Oliveira Correia AM, Borges AB, Torres CRG. Color masking prediction of posterior white spot lesions by resin infiltration in vitro. Journal of Dentistry. 2020;95:1-7.

6. Manoharan V, Kumar SA, Arumugam SB, Anand V, Krishnamoorthy S, Methippara JJ. Is resin infiltration a microinvasive approach to white lesions of calcified tooth structures? A systemic review. International Journal of Clinical Pediatric Dentistry. 2019;12(1):53-58.

7. Salerno C, Grazia Cagetti M, Cirio S, et al. Distribution of initial caries lesions in relation to fixed orthodontic therapy. A systematic review and meta-analysis. European Journal of Orthodontics. 2024;46(2):1-15.

8. Wu J, Fried D. High contrast near-infrared polarized reflectance images of demineralization on tooth buccal and occlusal surfaces at lambda = 1310-nm. Lasers Surg Med. Mar 2009;41(3):208-213. doi:10.1002/lsm.20746

