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NCT Number: NCT05843981

Comparison KS Versus TS

To compare the clinical and radiographic outcomes of two different implant systems with different implant-abutment connection: Osstem TS III (control group) versus Osstem KS (study group).

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Key information

Conditions

Dental Implant Dental Implant-Abutment Design

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

Any partially edentulous patient with partial edentulism, requiring at least two dental implant-supported rehabilitations, being 18 years or older, and able to sign an informed consent. Implant sites must allow the placement of two implants of at least 4 (premolars) or 4.5 (molars) mm of diameter and 8.5 mm of length. Smokers will be included and categorized into: 1) non smokers; 2) moderate smokers (smoking up to 10 cigarettes/day); 3) heavy smokers (smoking more than 11 cigarettes/day). In case of post-extractive sites, they must have been healing for at least 3 months before being treated in the study. Implants can be adjacent.

Exclusion criteria

  • General contraindications to implant surgery.
  • Patients irradiated in the head and neck area.
  • Immunosuppressed or immunocompromised patients.
  • Patients treated or under treatment with intravenous amino-bisphosphonates.
  • Patients with untreated periodontitis.
  • Patients with poor oral hygiene and motivation.
  • Previous guided bone reconstruction at the intended implant sites.
  • Uncontrolled diabetes.
  • Pregnancy or nursing.
  • Substance abuser.
  • Psychiatric problems or unrealistic expectations.
  • Lack of opposite occluding dentition in the area intended for implant placement.
  • Patients with infection and or inflammation in the area intended for implant placement.
  • Patients participating in other studies, if the present protocol cannot be properly adhered to.
  • Patients referred only for implant placement and cannot be followed ant the treating centre.
  • Patients unable to be followed for 5 years.

Treatment and study plan

Implant placement TS III

Device

Implant placement in subjects who have lost at least two teeth and need a prosthetic implant rehabilitation with TSIII Implant. . After osseointegration, dental implants will receive definitive prosthesis.

Other names: Dental prosthesis delivery

Implant placement ks

Device

Implant placement in subjects who have lost at least two teeth and need a prosthetic implant rehabilitation with KS Implant. After osseointegration, dental implants will receive definitive prosthesis.

Other names: Dental prosthesis delivery

Primary outcomes

  1. Number of Participants with implant failure

    Time frame: Up to 5 years

    Defined as implant mobility and/or any infection dictating implant removal, and/or implant fracture and/or any other mechanical complication rendering the implant unusable. The stability of each individual implant will be measured by the local blinded outcome assessors manually tightening the screws with a torque of 30 Ncm at abutment connection at initial loading. At 1,3 and 5 years after loading, individual implants will be manually tested for stability. Once the single crowns will be screwed, their stability will be assessed by rocking the crown with the handles of two dental instruments.

  2. Number of Participants with prosthesis failure

    Time frame: Up to 5 years

    Whether it will not be possible to place the prosthesis because of implant failure or a prosthesis that has to be remade for any reason.

  3. Number of complications

    Time frame: Up to 5 years

    Technical (fracture of the framework and/or the veneering material, screw loosening, etc.) and/or biologic (pain, swelling, suppuration, peri-implantitis, etc.) complications will be considered.

Secondary outcomes

  1. Rate of peri-implant marginal bone level changes

    Time frame: At 1,3 and 5 years

    Peri-implant marginal bone level changes will be assessed on periapical radiographs took with the paralleling technique at implant placement, at initial loading, 1,3 and 5 years after loading. Ideally digital radiographs should be taken, otherwise radiographs on conventional films will be scanned into TIFF format with a 600 dpi resolution, and stored in a personal computer. Peri-implant marginal bone levels will be measured using the Scion Image (Scion Corporation, Frederick, MD, USA) software. The software will be calibrated for every single image using the known distance of the first two consecutive threads. Measurements of the mesial and distal bone crest level adjacent to each implant will be made to the nearest 0.01 mm. Reference points for the linear measurements will be: the coronal margin of the implant collar and the most coronal point of bone-to-implant contact. Bone levels will be measured.

  2. Valuation of patient satisfaction

    Time frame: At 1,3 and 5 years

    Patients will answer the following questions (separately for each implant):

    • Are you satisfied with the function of your implant-supported prostheses? Possible answers: yes absolutely, yes partly, not sure, not really, absolutely not.
    • Are you satisfied with the aesthetic outcome of your implant-supported prostheses? Possible answers: yes absolutely, yes partly, not sure, not really, absolutely not.
    • Would you undergo the same therapy again? Possible answers: "yes" or "no".

Sponsors and collaborators

Lead sponsor

Università degli Studi di Sassari

Other

Collaborators

  • Baldoni, Edoardo, M.D.
  • Dr. Aurea Lumbau
  • Melodia, Dario, M.D.
  • Meloni, Silvio Mario, M.D.
  • Pisano, Milena, M.D.

Registry information

Official study title

The Use of an Innovative, Thickened and Lasting Implant Comparing KS Versus TS Implants for Prosthetic Rehabilitations

Important dates

Study start
2024
Primary completion
2024
Study completion
2028
First posted
May 6, 2023
Registry last updated
Feb 23, 2024

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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