Performance and Outcome of Zirconia Dental Implants

Consensus Statement 1: Published data for Commercially Available (CA) zirconia implants only allow valid statements for one-piece designs

The published data for CA zirconia implants only allow valid statements for one-piece designs. This statement is based on nine clinical studies (8 Prospective and 1 Retrospective) including 510 implants followed for 1-year, and five clinical studies (5 Prospective) including 192 implants followed for 2 years.

Consensus Statement 2: Survival rates of CA one-piece zirconia implants showed similar outcomes when compared with published data on titanium implants

Comparing survival rates of CA one-piece zirconia implants with published data on titanium implants, 1-year (98%) and 2-year (97%) results showed similar outcomes. This statement is based on nine clinical studies (8 Prospective and 1 Retrospective) including 510 implants followed for 1 year, and five clinical studies (5 Prospective) including 192 implants followed for 2 years.

Consensus Statement 3: The survival rates of CA one-piece zirconia implants are statistically significantly higher than NCA implants

The survival rates of CA one-piece zirconia implants are statistically significantly higher than NCA implants. This statement is based on 18 clinical studies (14 Prospective and 4 Retrospective) including 1,128 implants.

Consensus Statement 4: CA zirconia implants show a mean peri-implant marginal bone loss on 0.67 mm after 1 year

CA zirconia implants show a mean peri-implant marginal bone loss on 0.67 mm (range: 0.20–1.02 mm) after 1 year. This statement is based on seven clinical studies (6 Prospective and 1 Retrospective) including 376 implants.

Consensus Statement 5: Marginal bone loss is not significantly different in NCA compared to CA zirconia implants

Comparing NCA and CA zirconia implants, marginal bone loss is not statistically significantly different. This statement is based on 14 clinical studies (11 Prospective and 3 Retrospective) including 839 implants.

Consensus Statement 6: Comparing NCA and CA zirconia implants, the fracture rate of one-piece designs has reduced from 3.4% to 0.2%

Comparing NCA and CA zirconia implants, the fracture rate of one-piece designs has reduced from 3.4% to 0.2%. This statement is based on 18 clinical studies (14 Prospective and 4 Retrospective) including 1,128 implants.

1) The use of one-piece CA zirconia implants can be recommended in certain cases

Based on available data (up to 2 years), the use of one-piece CA zirconia implants can be recommended in cases where a one-piece soft tissue level implant with a cemented prosthesis in indicated and if requested by the patient.

2) Placement of one-piece zirconia implants should be prosthetically driven

Placement of one-piece zirconia implants should be prosthetically driven according to established guidelines for the implant design.

3) When using one-piece CA zirconia implants, difficulties relating to a submucosal prosthodontic margin and removal of cement excess must be considered

When using one-piece CA zirconia implants, the difficulties relating to a submucosal prosthodontic margin, removal of cement excess and difficulty with explanation have to be considered.

4) Two-piece CA zirconia implants can only be recommended with caution

Two-piece CA zirconia implants can only be recommended with caution due to insufficient supporting data