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. 2019 Sep 2;7(3):87. doi: 10.3390/dj7030087

Table 1.

Inclusion and exclusion criteria used for identifying papers in the systematic review.

Inclusion Criteria for Studies Included

  1. Investigated any form of layered double hydroxide, for example MgAl, ZnAl, CaAl and MgFe, in dentistry.

  2. Reported data on any type of ion or drug release from LDH (e.g., fluoride, calcium, chlorhexidine) in dentistry.

  3. Utilised a range of characterisation techniques.

  4. Investigated the use of LDH with a potential for dental applications.

  5. Any randomised or quasi-randomised clinical studies investigating LDH.

Exclusion Criteria

  1. Studies investigating the uptake/removal of ions or drugs by LDH in medicine or non-dental research.

  2. Applications of ion release not used in the dental materials market.