What do systematic reviews say?

Altered-cast impression technique (ACIP), polyether vs One-piece cast technique (OPC), polyether

Altered-cast impression technique (ACIP), polyether led to lower denture base adaptation (buccal shelf and ridge crest) compared with one-piece cast technique (OPC), polyether; GRADE not reported.

• Final‐impression techniques and materials for making complete and removable partial dentures 2018 · Cochrane All outcomes

  1 year
  MD -0.11 [-0.18, -0.04]
  1 study
  GRADE not reported

Surgical anchorage (mini-screw or mid-palatal implant) vs Conventional anchorage (headgear, transpalatal/palatal arch, etc.)

• Reinforcement of anchorage during orthodontic brace treatment with implants or other surgical methods 2014 · Cochrane All outcomes
  Reported narratively in 1 study (Feldmann 2007): limitations in daily life and jaw function were low to moderate throughout the trial with no differences between anchorage groups; impact on mood and appearance peaked…
  1 study · 113 participants
  GRADE not reported

Dual mini-screw implant vs Single mini-screw implant

The review found no eligible studies for this question.

• Reinforcement of anchorage during orthodontic brace treatment with implants or other surgical methods 2014 · Cochrane All outcomes
  Acceptability was not reported in any of the studies comparing two types of surgical anchorage
  0 studies
  No studies found

Titanium framework FDP vs High-gold content alloy framework FDP

Titanium framework FDP led to higher unacceptable restoration (poor marginal integrity / restoration… compared with high-gold content alloy framework FDP; GRADE not reported.

• Interventions for replacing missing teeth: partially absent dentition 2012 · Cochrane All outcomes
  RR 10.23 [1.41, 74.44]
  1 study · 47 participants
  GRADE not reported