Soft Tissue Response to Different Restorative Materials Used in Implant Dentistry

Trial statusRecruiting
Trial phaseNot applicable
Trial typeInterventional
Biological sexAll
Age18+
SponsorHarvard Medical School (HMS and HSDM)

About this trial

The goal of this clinical trial is to learn how different materials used in dental implants affect the surrounding gum tissue in adults who need dental implants. The main questions it aims to answer are:

How do different materials (titanium, PEEK, zirconia, and lithium disilicate) affect inflammation around dental implants? What changes occur in inflammation markers in the gum tissue after 3 and 6 months? Researchers will compare the different materials to see which one causes the least amount of inflammation.

Participants will:

Receive dental implants made from different materials. Have samples of fluid from around their implants collected for analysis at 3 and 6 months.

Undergo regular dental check-ups to measure gum health, such as bleeding and pocket depth around the implants.

Eligibility criteria

This trial accepts healthy volunteers

Qualifiers

Participants must be 18 years or older.

Participants must be edentulous with at least four missing teeth in the posterior region of the mandible or maxillae.

Participants must have appropriate oral hygiene and periodontal status of natural teeth, with a pocket depth of 4mm or less and no bleeding.

Dental implants must be fully integrated with no bone resorption or inflammation after three months of implant placement, confirmed by X-ray and clinical examination.

Disqualifiers

Patients with systemic diseases such as malignancy, diabetes, osteoporosis, or rheumatoid arthritis.

Patients with a history of periodontal treatment.

Patients who smoke or use tobacco.

Patients who have received antibiotic treatment within three months prior to implantation.

Trial design

Design model

Parallel

Treatments tested in this trial

  • Dental Crown with Titanium-Abutment

    Device

    Participants in this clinical trial will receive dental implants and single screw-retained crowns made from one of four different materials: titanium, PEEK (Polyetheretherketone), zirconia, or lithium disilicate (e.max). The implants will be placed in the posterior region of the mandible or maxillae. The study will evaluate the impact of these materials on peri-implant soft tissue health by measuring inflammatory markers in the peri-implant crevicular fluid and assessing clinical outcomes such as bleeding on probing and pocket depth at 3 and 6 months post-implantation.

  • Dental Crown with PEEK (Polyetheretherketone)-Abutment

    Device

    Participants in this clinical trial will receive dental implants and single screw-retained crowns made from one of four different materials: titanium, PEEK (Polyetheretherketone), zirconia, or lithium disilicate (e.max). The implants will be placed in the posterior region of the mandible or maxillae. The study will evaluate the impact of these materials on peri-implant soft tissue health by measuring inflammatory markers in the peri-implant crevicular fluid and assessing clinical outcomes such as bleeding on probing and pocket depth at 3 and 6 months post-implantation.

  • Dental Crown with Zirconia-Abutment

    Device

    Participants in this clinical trial will receive dental implants and single screw-retained crowns made from one of four different materials: titanium, PEEK (Polyetheretherketone), zirconia, or lithium disilicate (e.max). The implants will be placed in the posterior region of the mandible or maxillae. The study will evaluate the impact of these materials on peri-implant soft tissue health by measuring inflammatory markers in the peri-implant crevicular fluid and assessing clinical outcomes such as bleeding on probing and pocket depth at 3 and 6 months post-implantation.

  • Dental Crown with Lithium-Disilicate-Abutment (e.max)

    Device

    Participants in this clinical trial will receive dental implants and single screw-retained crowns made from one of four different materials: titanium, PEEK (Polyetheretherketone), zirconia, or lithium disilicate (e.max). The implants will be placed in the posterior region of the mandible or maxillae. The study will evaluate the impact of these materials on peri-implant soft tissue health by measuring inflammatory markers in the peri-implant crevicular fluid and assessing clinical outcomes such as bleeding on probing and pocket depth at 3 and 6 months post-implantation.

Treatment groups

40 Participants
are divided into 4 treatment groups
Group A: Dental Crown with Titanium-AbutmentExperimental treatment 1 intervention
Group B: Dental Crown with PEEK (Polyetheretherketone)-AbutmentExperimental treatment 1 intervention
Group C: Dental Crown with Zirconia-AbutmentExperimental treatment 1 intervention
Group D: Dental Crown with Lithium-Disilicate-Abutment (e.max)Experimental treatment 1 intervention

Trial outcomes

Primary outcomes

1

Concentration of Inflammatory Biomarkers in Peri-Implant Crevicular Fluid

The primary outcome measure will evaluate the concentration of inflammatory biomarkers in the peri-implant crevicular fluid, including IL-6, IL-8, IL-10, IL-17, TNF-alpha, IL-12, IL-1-beta, and IL-4. These biomarkers all have the same unit and will be measured to assess the inflammatory response of peri-implant soft tissue to different prosthetic materials (titanium, PEEK, zirconia, and lithium disilicate). The goal is to determine which material induces the least amount of inflammation, indicating better biocompatibility and a lower risk of peri-implantitis.

Time frame
3 and 6 months post-implantation

Secondary outcomes

1

Clinical Measurements of Bleeding on Probing (BOP) and Pocket Depth

The secondary outcome measure will assess the clinical health of the peri-implant tissue by measuring bleeding on probing (BOP) around the dental implants. These clinical parameters will provide additional insights into the soft tissue response to the different prosthetic materials used in the implants (titanium, PEEK, zirconia, and lithium disilicate). Improved clinical outcomes, such as reduced bleeding and shallower pocket depths, will indicate better biocompatibility and integration of the implant materials.

Time frame
3 and 6 months post-implantation
2

Clinical Measurements of Pocket Depth

The secondary outcome measure will assess the clinical health of the peri-implant tissue by measuring pocket depth around the dental implants. These clinical parameter will provide additional insights into the soft tissue response to the different prosthetic materials used in the implants (titanium, PEEK, zirconia, and lithium disilicate). Improved clinical outcomes, such as reduced bleeding and shallower pocket depths, will indicate better biocompatibility and integration of the implant materials.

Time frame
3 and 6 months post-implantation

Other outcomes

Sponsors and contacts

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