What do systematic reviews say?

Dental cavity liner (e.g. calcium hydroxide, glass ionomer, resin-modified glass ionomer, or flowable composite) placed under the restoration vs No liner (resin-based composite bonded directly to the tooth)

• Dental cavity liners for Class I and Class II resin‐based composite restorations 2019 · Cochrane All outcomes
  One study (Strober 2013) reported cost, concluding that eliminating a resin-modified glass ionomer lining could save approximately USD 4.50 per filling (about USD 2000 per dentist per year). No comparative effect…
  1 study
  GRADE not reported

Resorbable (bioresorbable) plates or screws for fixation vs Titanium plates or screws for fixation

The review found no eligible studies for this question.

• Resorbable versus titanium plates for orthognathic surgery 2017 · Cochrane All outcomes

  Up to 3 years postoperatively
  None of the studies reported on the cost incurred in the treatment.
  0 studies
  No studies found

Adhesively bonded amalgam restorations in conventional preparations utilising deliberate retention (all bonding agents) vs Amalgam restoration

The review found no eligible studies for this question.

• Adhesively bonded versus non‐bonded amalgam restorations for dental caries 2016 · Cochrane All outcomes
  Economic data: direct costs of materials and any reported associated indirect costs - not measured | See comment | See comment | Not estimable | - | See comment | No study addressed this outcome
  0 studies
  No studies found