What do systematic reviews say?

Metal-free FDPs (zirconia ceramic) vs Metal-ceramic FDPs

• Metal‐free materials for fixed prosthodontic restorations 2017 · Cochrane All outcomes

  12 and 36 months
  At 12 months and at 36 months 34 participants were available for analysis. No FDP failure was reported in either treatment approach at either time.
  1 study · 34 participants
  Very low

Metal-free FDPs (zirconia ceramic) vs Metal-ceramic FDPs

The review found no eligible studies for this question.

• Metal‐free materials for fixed prosthodontic restorations 2017 · Cochrane All outcomes
  No data were presented for any of the pre-specified secondary outcomes. The trial registered pocket depth, bleeding on probing and mobility at follow-up visits but did not report the data.
  0 studies
  No studies found

Metal-free FDPs (zirconia ceramic) vs Metal-ceramic FDPs

It is very uncertain whether metal-free FDPs (zirconia ceramic) changes bridge complications compared with metal-ceramic FDPs (very low certainty).

• Metal‐free materials for fixed prosthodontic restorations 2017 · Cochrane All outcomes

  36 months
  OR 1.94 [0.38, 9.88]
  1 study · 34 participants
  Very low

Metal-free FDPs (zirconia ceramic) vs Metal-ceramic FDPs

It is very uncertain whether metal-free FDPs (zirconia ceramic) changes aesthetic evaluation (patient aesthetic satisfaction changes) compared with metal-ceramic FDPs (very low certainty).

• Metal‐free materials for fixed prosthodontic restorations 2017 · Cochrane All outcomes

  36 months
  OR 15.40 [0.78, 304.61]
  1 study · 34 participants
  Very low

Metal-free tooth-supported FDPs (pressed veneering ceramic) vs Metal-free tooth-supported FDPs (layered veneering ceramic)

• Metal‐free materials for fixed prosthodontic restorations 2017 · Cochrane All outcomes
  No comparative data were presented with regard to aesthetics. Aesthetics evaluated by the patient was reported dichotomously (yes/no) in the trial but no between-group estimate was presented.
  1 study
  GRADE not reported

Metal-free tooth-supported FDPs (pressed veneering ceramic) vs Metal-free tooth-supported FDPs (layered veneering ceramic)

• Metal‐free materials for fixed prosthodontic restorations 2017 · Cochrane All outcomes
  No comparative data were presented for the pre-specified secondary outcomes. The trial analyzed and reported plaque index, bleeding on probing and pocket probing depth but no between-group estimate was presented in the…
  1 study
  GRADE not reported

Metal-free tooth-supported FDPs (pressed veneering ceramic) vs Metal-free tooth-supported FDPs (layered veneering ceramic)

• Metal‐free materials for fixed prosthodontic restorations 2017 · Cochrane All outcomes

  12 and 36 months
  At 12 months 40 participants were available and at 36 months 36 participants were available. No FDP failures were reported in either group at either time.
  1 study · 40 participants
  Very low

Metal-free tooth-supported FDPs (pressed veneering ceramic) vs Metal-free tooth-supported FDPs (layered veneering ceramic)

It is very uncertain whether metal-free tooth-supported FDPs (pressed veneering ceramic) changes bridge complications compared with metal-free tooth-supported FDPs (layered veneering ceramic) (very low certainty).

• Metal‐free materials for fixed prosthodontic restorations 2017 · Cochrane All outcomes

  36 months
  OR 2.80 [0.66, 11.92]
  1 study · 36 participants
  Very low

Metal-free implant-supported single crowns (zirconia veneered with feldspathic ceramic) vs Metal-ceramic implant-supported single crowns

Metal-free implant-supported single crowns (zirconia veneered with… showed no clear difference in marginal bone level (first bone to implant contact, FBIC) compared with metal-ceramic implant-supported single crowns; GRADE not reported.

• Metal‐free materials for fixed prosthodontic restorations 2017 · Cochrane All outcomes

  24 months · Mesial to crown
  MD -0.01 [-0.93, 0.91]
  1 study · 18 participants
  GRADE not reported
• Metal‐free materials for fixed prosthodontic restorations 2017 · Cochrane All outcomes

  12 months · Mesial to crown
  MD -0.03 [-0.42, 0.36]
  1 study · 18 participants
  GRADE not reported
• Metal‐free materials for fixed prosthodontic restorations 2017 · Cochrane All outcomes

  24 months · Distal to crown
  MD -0.18 [-0.89, 0.53]
  1 study · 18 participants
  GRADE not reported

Metal-free implant-supported single crowns (zirconia veneered with feldspathic ceramic) vs Metal-ceramic implant-supported single crowns

It is very uncertain whether metal-free implant-supported single crowns (zirconia veneered with… changes aesthetic evaluation (patient satisfaction VAS) compared with metal-ceramic implant-supported single crowns (very low certainty).

• Metal‐free materials for fixed prosthodontic restorations 2017 · Cochrane All outcomes

  12 months
  MD -4.65 [-18.75, 9.45]
  1 study · 18 participants
  Very low
• Metal‐free materials for fixed prosthodontic restorations 2017 · Cochrane All outcomes

  24 months
  MD -0.03 [-7.65, 7.59]
  1 study · 18 participants
  Very low

Metal-free implant-supported single crowns (zirconia veneered with feldspathic ceramic) vs Metal-ceramic implant-supported single crowns

It is very uncertain whether metal-free implant-supported single crowns (zirconia veneered with… changes aesthetic evaluation (pink and white aesthetic score, PES and WES… compared with metal-ceramic implant-supported single crowns (very low certainty).

• Metal‐free materials for fixed prosthodontic restorations 2017 · Cochrane All outcomes

  24 months
  MD -0.77 [-3.00, 1.46]
  1 study · 18 participants
  Very low

Metal-free implant-supported single crowns (zirconia veneered with feldspathic ceramic) vs Metal-ceramic implant-supported single crowns

• Metal‐free materials for fixed prosthodontic restorations 2017 · Cochrane All outcomes

  12 and 24 months
  At 12 and 24 months 18 participants were available. No failure was reported for the test or control groups at either 12 or 24 months.
  1 study · 18 participants
  Very low

Metal-free implant-supported single crowns (zirconia veneered with feldspathic ceramic) vs Metal-ceramic implant-supported single crowns

It is very uncertain whether metal-free implant-supported single crowns (zirconia veneered with… changes implant crown complications compared with metal-ceramic implant-supported single crowns (very low certainty).

• Metal‐free materials for fixed prosthodontic restorations 2017 · Cochrane All outcomes

  24 months
  OR 6.33 [0.26, 152.86]
  1 study · 18 participants
  Very low

Ceramic inlays (all types) vs Composite resin inlay

The review found no eligible studies for this question.

• Ceramic inlays for restoring posterior teeth 2003 · Cochrane All outcomes
  One randomised controlled trial (Gladys 1995) compared ceramic and resin composite inlays over 3 years, but it was excluded because the study design (parallel-group or split-mouth) was not clearly described; no…
  0 studies
  No studies found

Ceramic inlays (all types) vs Amalgam

The review found no eligible studies for this question.

• Ceramic inlays for restoring posterior teeth 2003 · Cochrane All outcomes
  No eligible randomised controlled trial comparing ceramic inlays with amalgam restorations was identified; this planned comparison could not be evaluated.
  0 studies
  No studies found

Ceramic inlays (all types) vs Gold inlay

The review found no eligible studies for this question.

• Ceramic inlays for restoring posterior teeth 2003 · Cochrane All outcomes
  Information on aesthetic satisfaction could not be obtained from this study as it did not use the tooth-coloured restorations as the control group.
  0 studies
  No studies found

Ceramic inlays (all types) vs Gold inlay

• Ceramic inlays for restoring posterior teeth 2003 · Cochrane All outcomes

  1 week
  Postoperative sensitivity was evaluated 1 week after placement. No teeth with ceramic inlays were found to have postoperative sensitivity, while one tooth with gold inlay presented sensitivity, which lasted more than 2…
  1 study · 20 participants
  GRADE not reported

Ceramic inlays (all types) vs Gold inlay

Ceramic inlays (all types) showed no clear difference in failure rate (longevity) at 5 years compared with gold inlay; GRADE not reported.

• Ceramic inlays for restoring posterior teeth 2003 · Cochrane All outcomes

  5 years
  OR 1.12 [0.08, 15.0]
  1 study · 20 participants
  GRADE not reported

Ceramic inlays (all types) vs Composite resin (direct restoration)

The review found no eligible studies for this question.

• Ceramic inlays for restoring posterior teeth 2003 · Cochrane All outcomes
  No eligible randomised controlled trial comparing ceramic inlays with composite resin (direct) restorations was identified; this planned comparison could not be evaluated.
  0 studies
  No studies found

Single full-coverage metal-ceramic crown over composite core and post vs Direct adhesive composite restoration with post (conventional filling, no crown)

The review found no eligible studies for this question.

• Single crowns versus conventional fillings for the restoration of root‐filled teeth 2015 · Cochrane All outcomes
  No data were reported nor measured by the study. The abstract confirms no evidence was available for any secondary outcome.
  Studies not reported
  No studies found