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Comparison of Clinical Performance and Safety of Zirconia vs. Titanium Implants: a Multi-national RCT.

Comparative Performance of Zirconia Tissue Level Implants vs. Titanium Bone Level Implants Placed With a Fully Digital Workflow: A Multicentre Multinational Randomized Controlled Clinical Trial

Status
Completed
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03908177
Enrollment
121
Registered
2019-04-09
Start date
2019-09-07
Completion date
2025-04-01
Last updated
2026-04-23

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Dental Implants, Single-Tooth

Brief summary

A post-market, multi-centre, prospective, open, randomized-controlled, non-inferiority clinical study to compare short-term performance and safety of the Straumann PURE 2-piece Ceramic Implant with Straumann Bone Level Implant using a fully digital workflow.

Detailed description

To compare short-term performance and safety of the Straumann PURE 2-piece Ceramic Implant with Straumann Bone Level Implant using a fully digital workflow. Post-market, multi-centre, prospective, open, randomized-controlled, non-inferiority clinical study investigating patients in need of dental implant therapy for single-tooth gap rehabilitation. The follow up time is1 year after final crown restoration.

Interventions

The ceramic implant will be placed in healed extraction sockets in the premolar-to-premolar area in the mandible and maxilla for single tooth replacement followed by prosthetic loading after 4 months healing time. Type 4 surgery will be performed as defined by the ITI Consensus Statements for Implant Placement in Extraction Sockets: healed sites, typically around 16 weeks after tooth was extracted or after tooth was lost to allow complete healing of the ridge as well as soft- and hard tissue maturation. Both SG and CG receive routine treatment, only the choice of the implant material is defined by the study protocol.

The titanium implant will be placed in healed extraction sockets in the premolar-to-premolar area in the mandible and maxilla for single tooth replacement followed by prosthetic loading after 4 months healing time. Type 4 surgery will be performed as defined by the ITI Consensus Statements for Implant Placement in Extraction Sockets: healed sites, typically around 16 weeks after tooth was extracted or after tooth was lost to allow complete healing of the ridge as well as soft- and hard tissue maturation. Both SG and CG receive routine treatment, only the choice of the implant material is defined by the study protocol.

Sponsors

Institut Straumann AG
Lead SponsorINDUSTRY
Avania
CollaboratorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes

Inclusion criteria

* Patients must have voluntarily signed the Informed Consent Form before any study related procedures are performed, are willing and able to attend scheduled follow-up visits and agree that the pseudonymized data will be collected, analysed, and published. * Patients must be males or females who are a minimum of 18 years of age. * Patients, who are in need of a single tooth replacement with a dental implant in the premolar-to-premolar area in the mandible or maxilla (excluding lower incisors). * Presence of natural teeth on both sides of the study implant position and opposing dentition (single tooth gap). * Patients with healed extraction sockets, which means that at implant surgery: * Soft tissue coverage of the socket is complete; and * Alveolar bone is reconsolidated (around 16 weeks after tooth extraction).

Exclusion criteria

* Patients with inadequate bone volume where major bone augmentation would be required at implant location. * Inadequate anatomic situation that would prevent prosthetic-driven planning based on CBCT. * Presence of implants neighbouring the study implant. * Patients with inadequate oral hygiene (FMPS ≥ 20%). * Patients with local root remnants. * Patients with inadequate wound healing capacity. * Patients with incomplete maxillary and mandibular growth. * Patients with medical contraindications to implant surgery (uncontrolled bleeding disorders, psychoses, prolonged therapy-resistant functional disorders, xerostomia, weakened immune system, illnesses requiring periodic use of steroids or uncontrollable endocrine disorders. * Patients with drug or alcohol abuse. * Patients with allergies or hypersensitivity to zirconium oxide (ZrO2), yttrium oxide (Y2O3), hafnium dioxide (HfO2), aluminium oxide (Al2O3), and titanium (Grade 4). * Patients with medical contraindications to implant surgery (uncontrolled bleeding disorders, psychoses, prolonged therapy-resistant functional disorders, xerostomia, weakened immune system, illnesses requiring periodic use of steroids or uncontrollable endocrine disorders). * Patients with conditions or circumstances, in the opinion of the Investigator, which would prevent completion of study participation or interfere with analysis of study results, such as history of non-compliance or unreliability. * Pregnancy or intention to become pregnant at any point during the study duration. Furthermore, patients with uncontrolled periodontitis and less than 3 mm of keratinized mucosa at the day of surgery will be excluded from the study. Controlled periodontitis is defined as treated periodontitis with two or less pockets that are \< 4 mm in depth or the existence of ≤ 20% bleeding on probing. If the planned implant position is the second premolar, the adjacent molar must be present. Shortened arches with missing molars are not eligible in such a case.

Design outcomes

Primary

MeasureTime frameDescription
Bone Level Change12 months after implant loading (final crown restoration)Change in crestal bone level measured by analysis of standardized peri-apical xrays 12 months after loading \[mm\].

Secondary

MeasureTime frameDescription
Implant survival12 months after loading.Implant survival rates 3, 6 months and 1 year after loading: yes/no
14 item Oral Health Impact Profile (OHIP-14)12 months after loading.The local language version of the OPHIP-14 is a self-reported questionnaire that measures dysfunction, discomfort and disability attributed to oral conditions. The questionnaire focuses on seven dimensions of impact: Functional limitation; Pain; Psychological discomfort; Physical disability; Psychological disability; Social disability; Handicap. The patients will be asked to respond according to frequency of impact on a 5-point Likert scale coded never (score 0), hardly ever (score 1), occasionally (score 2), fairly often (score 3) and very often (score 4).

Countries

Germany, Hong Kong, Portugal

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Apr 24, 2026