Modified ZeroExpander for patients with MIH and HSPM

Background Hypomineralisation of the first permanent molars (MIH)
and second deciduous molars (HSPM) is an increasingly prevalent
structural problem in paediatric patients. At the same time, the
transverse palatal deficit is frequently found in that age group and
necessitates early intervention. The purpose of this work is to present
three new designs of the ZeroExpander, specifically developed for
patients with hypomineralised teeth, which would otherwise be
challenging to engage during orthodontic treatment.
Case report The ZeroExpanders for hypomineralised teeth
are customized devices, digitally designed and produced from
technopolymer. They feature overlay bands that fit over the
hypomineralised teeth, combined with bioactive cements that
facilitates continuous remineralisation of the dental enamel. These
devices apply light forces within a pre-programmed, automatic
expansion framework. Three examples of ZeroExpanders are presented:
one for patients with both MIH and HSPM, one for MIH alone, and
one for HSPM alone. Additionally, a case is illustrated where a patient
with MIH in the early permanent dentition was successfully treated.
Conclusion The modified ZeroExpanders help preserve the integrity of
both directly and indirectly involved hypomineralised teeth, including
those in the lower arch. The workflow is effective and efficient,
and they have the same level of effectiveness as the standard
ZeroExpanders in terms of achieving the programmed expansion.