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Yakovenko N.I., Vasil’ev Yu.L., Velichko E.V., Saleev R.A., Saleeva G.T. Clinical and radiological evaluation of the effectiveness of the use of collagen cones in the prevention of post-extraction complications. Clinical Dentistry (Russia).  2019; 4 (92): 74—77. DOI: 10.37988/1811-153X_2019_4_74