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OpenTrials
Completed

NCT Number: NCT03908177

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

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.

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Key information

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Dusseldorf University Hospital, Poliklinik für Zahnärztliche Prothetik, Düsseldorf, Germany

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About this 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. 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.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

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.

Treatment and study plan

Ceramic Dental Implant

Device

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.

Titanium Dental Implant

Device

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.

Primary outcomes

  1. Bone Level Change

    Time frame: 12 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 outcomes

  1. Implant survival

    Time frame: 12 months after loading.

    Implant survival rates 3, 6 months and 1 year after loading: yes/no

  2. 14 item Oral Health Impact Profile (OHIP-14)

    Time frame: 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).

Other outcomes

  1. Adverse Events

    Time frame: 18 months after inclusion.

    Adverse Events will be recorded at every visit.

  2. Device Deficiencies

    Time frame: 18 months after inclusion.

    Any device complications and deficiencies will be recorded as Device Deficiencies.

Sponsors and collaborators

Lead sponsor

Institut Straumann AG

Industry

Collaborators

  • Avania

Registry information

Official study title

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

Important dates

Study start
2019
Primary completion
2025
Study completion
2025
First posted
Apr 9, 2019
Registry last updated
Apr 23, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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