1. Introduction
Drooling is defined as the presence of saliva beyond the margins
of the lip. It is part of normal physical development in newborns
and infants, decreasing significantly by eighteen months of age
such that by the fourth year, the presence of drooling is considered
abnormal. Drooling can become a considerable medical and social
problem in children and young adults and it is common in children
with neurological and muscular disorders. Drooling arises more as
a consequence of an inability or inefficiency of the swallowing
rather than from an excessive production of saliva [1].
The treatment options available for managing drooling are
tailored to the severity of the problem. Different therapeutic
strategies that have been used to reduce or eliminate drooling
include behavioral therapy, medication, Botulinum toxin injection,
and surgery [1,2].
A major limitation of many studies on drooling is the absence of
standardized quantitative methods to assess the effectiveness of
the treatment, and specifically the inadequacy of some methods
that attempt to quantify drooling. This makes it difficult to