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Assessment of Clayey Peloid Formulations Prior to Clinical Use in Equine Rehabilitation.

Abstract：

:Clays are natural ingredients used to prepare therapeutic cataplasms suitable for topical application. The knowledge about these formulations and their preparations to be applied on humans and animals has been orally transmitted since ancient times. Several empirical methods using clays have demonstrated fast and effective results in the reduction of the inflammatory response and the formation of edemas in horse limbs. The use of traditional and alternative medicine, such as pelotherapy, is now becoming more popular in veterinarian medical practice, alone or combined with other therapies in horse muscle and tendon rehabilitation. This study characterizes the use of commercial equine clays and an old therapeutic clay cataplasm formulation, using acetic acid, to treat tendon injuries in horses. This work might contribute to a major database characterization of clays used empirically on equine health, the potential of dermal absorption, the risks of exposure to some toxic elements, and safety assessment for these formulations. The present study was carried out to characterize the suitability of four commercial equine clays (Group II) and a protocoled healing mixture: "clay acetic acid cataplasm", (Group III), to treat tendon injuries in horses. In this mixture, three conventional "green" clays (Group I) without any mineralogical specificity were used and blended with acetic acid. The mineralogical composition was determined through X-ray powder diffraction and X-ray fluorescence data. To determine the performance of the samples, cooling kinetics, oil absorption, expandability, and specific surface area were measured. According to the mineralogical composition, Group I was mainly composed of carbonates and silicates, while Group II was much richer in silicates with the main clay minerals kaolinite and illite. Group II exhibited the highest values for As, Pb, Cr, Ni, and Zn, considered potentially toxic. Both groups showed low cation exchange capacities and exchanged mainly Ca2+, with the exception of VET.1 and VET.7, which also highlight Na+, and VET.5 and VET.6, which have K+ as an exchangeable main cation. The addition of acetic acid (Group III) does not reveal any significant chemical changes. The results confirm that both clay groups are adequate for the therapeutic propose. They have good plastic properties (skin adherence), good oil absorptive capabilities (cleaning), and exchange an essential physiological element, calcium. Group II has prior industrial preparation, which is probably why it showed better results. Group I presented lower heat retention capacity and higher abrasiveness, which could be improved using cosmetic additives. The clinical benefit of the "clay acetic acid cataplasm" (Group III) could be the systemic anti-inflammatory effect established by the acetic acid.

journal_name

Int J Environ Res Public Health

journal_title

International journal of environmental research and public health

authors

Bastos CM,Rocha F,Cerqueira Â,Terroso D,Sequeira C,Tilley P

doi

10.3390/ijerph17103365

subject

Has Abstract

pub_date

2020-05-12 00:00:00

issue

eissn

1661-7827

issn

1660-4601

pii

ijerph17103365

journal_volume

pub_type

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Assessment of Clayey Peloid Formulations Prior to Clinical Use in Equine Rehabilitation.