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Trefoil™ – the next full-arch revolution: New preliminary results to be presented at the EAO Congress

It is the latest leap forward in Nobel Biocare’s fight against edentulism. And, when released to clinicians for the first time in October 2017, it is to be accompanied by a full year’s scientific evidence of its performance leading up to the launch.

Trefoil multi-center study

The new treatment is the Trefoil system; a revolutionary full-arch solution for edentulism and failing dentition in the mandible. One year in to an international, five-year, multi-center clinical study, the eagerly awaited preliminary results will be revealed at the 26th Annual Scientific Meeting of the European Association for Osseointegration (EAO) Congress. 

Major prospective cohort study: five sites across four continents

The aim of the clinical investigation is to evaluate implant and prosthetic survival of the Trefoil system in the mandible1. Conducted in the US, Australia, Spain, Italy and Chile, the study’s international setup has contributed to the diversity of the patient group recruited, and participation of key global experts in edentulous and failing dentition rehabilitation as investigators. When the Trefoil system is available in October 2017, the treatment concept will have been in clinical use for over a year as part of this international study. The study is registered at with the identifier NCT02940353.

The Trefoil system

Scientific evidence for a revolutionary new treatment concept

The Trefoil system uses a standardized, pre-manufactured bar for fixation to three implants, and it features a unique adjustable fixation mechanism to achieve passive fit.

In the multi-center study, three conical connection implants were placed in anatomically predetermined positions between the mental foramina, with the aid of treatment-specific surgical guides and templates. The pre-manufactured Trefoil Bar was secured onto the implants after adjustment of the unique fixation mechanism – a key component of the system that enables a passive fit by compensating for horizontal, vertical or angular deviations from the ideal implant position. The three implants were loaded with the final prosthesis within twenty-four hours to two weeks of surgery.

See the preliminary study results at the EAO Congress

The Trefoil system is demonstrating good early results in terms of prosthetic and implant survival rates1. The first scientific presentation of the multi-center study one-year data will take place at the EAO Congress in Madrid, October 5–7: look for the Clinical Innovations Scientific Poster 6752, An adaptive prefabricated full-arch framework on three implants in the mandible: preliminary results. 

Dr. Kenji Higuchi

Principal author, Dr. Kenji Higuchi, will be present on the Nobel Biocare booth and will hold an oral poster presentation of the full results: 

Date: October 7, 2017
Time: 09:30 a.m.–11:00 a.m.
Location: Room 115

Dr. Higuchi will also explain the Trefoil system at the industry symposium session Innovative treatment protocols – Shortening time-to-teeth alongside Dr. José Navarro Sr., Spain:

Date: October 5, 2017
Time: 5:00 p.m.–7:00 p.m.
Location: Room 105 

More to explore


1 The TREFOIL Concept 5 Year Clinical Investigation (NCT02940353).