Effect of Gingival Biotype on Changes in Gingival Blood Flow under Orthodontic Forces Investigated by Laser Speckle Contrast Imaging

doi:10.13701/j.cnki.kqyxyj.2024.06.011

Abstract

Abstract: Objective: To explore the effect of gingival biotype on gingival blood flow (BF) changes under orthodontic forces by laser speckle contrast imaging (LSCI). Methods: The study recruited a total of 24 subjects who met the inclusion criteria, with 12 individuals allocated to the thin gingival group and another 12 allocated to the thick gingival group. A force of 150 g was randomly applied between either the left or right maxillary canines and the first molar in each volunteer. Subsequently, dynamic monitoring of BF using LSCI was conducted at various time points: before force application, at 30 minutes, 1 day, 3 days, 7 days, and 14 days. Results: Through inter group comparison, there were significant differences in BF between the thin group and the thick group at various time points, with the BF of the thick group significantly higher than that of the thin group (P<0.05). After intra group comparison, there were significant differences in BF at each time point in each group (P<0.05). After applying force, local BF decreased to the minimum value within 30 minutes to 1 day, rose to the maximum value around 7 days, and basically returned to the baseline by 14 days. In a resting state without force loading, there was a significant difference in BF between the free gingiva and interdental papilla (P<0.05), and the BF of the free gingiva was significantly lower than that of the interdental papilla area. Conclusion: LSCI is a useful tool to real-time monitor gingival BF during orthodontic treatment. The BF of thin gingival type was significantly lower than that of thick gingival type.

Key words: laser speckle contrast imaging, gingival blood flow, gingival biotype, periodontal health

YIN Fan, HAN Shuang, AN Qi, WANG Zhanli, GENG Rongguang, ZHAO Junwei. Effect of Gingival Biotype on Changes in Gingival Blood Flow under Orthodontic Forces Investigated by Laser Speckle Contrast Imaging[J]. Journal of Oral Science Research, 2024, 40(6): 530-536.

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