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Purpose <p>To evaluate pulpal oxygen saturation (SaO₂) in permanent incisors affected by molar incisor hypomineralisation (MIH) compared with sound permanent incisors in children.</p> Methods <p>This cross-sectional study included 112 MIH-affected and 112 sound permanent incisors from children aged 6–12 years. Clinical examination was performed in all teeth, and periapical radiographs were obtained for MIH-affected incisors to exclude pathology and assess root development. Pulpal oxygen saturation was measured using pulse oximetry. Data were analysed using a mixed-effects linear model accounting for clustering of multiple teeth within the same individual. Complementary non-parametric analyses were also performed.</p> Results <p>MIH-affected incisors showed lower SaO₂ than controls (mean difference: 1.37%; 95% CI 0.90–1.84; <i>p</i> &lt; 0.001). The intraclass correlation coefficient (ICC = 0.18) indicated moderate within-subject clustering. No significant differences in SaO₂ were observed according to root development stage (<i>p</i> = 0.45)<b>.</b></p> Conclusion <p>MIH-affected incisors exhibited slightly lower SaO₂ compared with sound teeth. Although statistically significant, the small magnitude of this difference limits its immediate clinical relevance and should be interpreted with caution.</p>

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A cross-sectional study of pulpal oxygen saturation in permanent incisors affected by molar incisor hypomineralisation (MIH)

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  • 发表日期：

    2026年7月29日

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  • T. C. de Almeida dos Santos,
  • M. J. D. Gallo,
  • A. B. de Souza Ramos,
  • A. A. Leandro Junior,
  • A. De Rossi,
  • F. W. G. de Paula e Silva,
  • M. D. Sousa-Neto,
  • C. Estrela,
  • F. K. de Carvalho,
  • A. M. de Queiroz

摘要

Purpose

To evaluate pulpal oxygen saturation (SaO₂) in permanent incisors affected by molar incisor hypomineralisation (MIH) compared with sound permanent incisors in children.

Methods

This cross-sectional study included 112 MIH-affected and 112 sound permanent incisors from children aged 6–12 years. Clinical examination was performed in all teeth, and periapical radiographs were obtained for MIH-affected incisors to exclude pathology and assess root development. Pulpal oxygen saturation was measured using pulse oximetry. Data were analysed using a mixed-effects linear model accounting for clustering of multiple teeth within the same individual. Complementary non-parametric analyses were also performed.

Results

MIH-affected incisors showed lower SaO₂ than controls (mean difference: 1.37%; 95% CI 0.90–1.84; p < 0.001). The intraclass correlation coefficient (ICC = 0.18) indicated moderate within-subject clustering. No significant differences in SaO₂ were observed according to root development stage (p = 0.45).

Conclusion

MIH-affected incisors exhibited slightly lower SaO₂ compared with sound teeth. Although statistically significant, the small magnitude of this difference limits its immediate clinical relevance and should be interpreted with caution.