A patient presents with generalized 3 to 4 mm of recession a…

A patient presents with generalized 3 to 4 mm of recession and flat interdental papillae.  It is also noted that this patient has several open interproximal areas and a dental implant replacing tooth #20.  You observe that the lingual surfaces of the mandibular molars and the proximal surfaces have retained a large amount of biofilm.  Which interdental aid would be appropriate to recommend for this patient?