Thermographic examination of gingival phenotypes: correlation between morphological and thermal parameters
Clinical Oral Investigations(2023)
Abstract
Objectives To evaluate the clinical and thermographic aspects of the gingival phenotype (GP) in healthy subjects. Materials and methods The study sample examined 264 teeth, upper and lower incisors, comprising 132 central incisors (CI) and 132 lateral incisors (LI), in 33 healthy volunteers. Four periodontal parameters were recorded systematically: ratio of width to length of the dental crown (CW/CL), height of the gingival attachment (KGW), probing depth (PD), and gingival transparency (GT). The temperatures of the attached gingiva (KGW temp) and the free gingival margin (FGM Temp) were also recorded by way of infrared thermography (IRT). Results The average age of the sample was 30.70 ± 7.65 years. Of the 264 teeth evaluated, 76.1% had a thin GP. There was a significant association between CW/CL ( p < 0.001), KGW ( p < 0.001), PD ( p < 0.007), and FGM Temp ( p < 0.006) with the tooth groups. The results show a significant and inversely proportional correlation between clinical parameters and gingival temperature ( p < 0.05). A significant association was found between CW/CL ( p < 0.026); KGW ( p < 0.001); and GP. Conclusion CW/CL, KGW, PD, and FGM Temp vary according to tooth group. The majority of the sample presented with the thin GP, which was more prevalent in the lower LIs and CIs. No significant association could be observed between thermographic parameters and GP. Clinical relevance Knowledge of the temperature of the gingival tissues can be useful in helping to diagnose and plan periodontal treatments. Moreover, our findings will help future studies evaluate the use of IR as an auxiliary diagnostic method in dentistry, eliminating GP as a confounding factor, since it does not seem to influence the temperature of the gingival tissues.
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Key words
Phenotype,Gingiva,Thermography,Infrared thermography,Periodontology
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