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Implant treatment for patients with severe hypodontia

PhD ceremony:Ms M.A.P. (Marieke) Filius
When:July 04, 2018
Start:16:15
Supervisors:prof. dr. A. (Arjan) Vissink, prof. dr. G.M. (Gerry) Raghoebar, prof. dr. M.S. (Marco) Cune
Co-supervisor:dr. A. Visser
Where:Academy building RUG
Faculty:Medical Sciences / UMCG
Implant treatment for patients with severe hypodontia

Implant treatment for patients with severe hypodontia

Hypodontia is a condition in which one or more permanent teeth are congenitally missing. When this concerns several teeth (severe hypodontia), function, aesthetics and quality of life can be negatively affected.

To solve or prevent these functional and aesthetic problems, missing teeth can be complemented by prosthetic means. Implant-based fixed prosthodontics (crowns and bridges) is a favourable treatment modality. However, due to the absence of several teeth, bone volume can be scarce and this interferes with implant placement. Thus, implant treatment can be challenging in hypodontia as most cases need bone augmentation with bone from other body regions or bone substitutes.

Only short-term implant survival rates in patients with severe hypodontia have been reported to date. Therefore, the overall aim of the research presented in this thesis was to assess the long-term treatment outcome (implant survival, survival of the crowns and bridges, health of the gums around the implants, quality of life) of dental implant treatment in patients with severe hypdontia.

Between January 1991 and December 2015, a total of 126 severe hypodontia patients were treated with dental implants at the University Medical Center Groningen. In total, 777 implants were placed of which 56 implants were lost resulting in a 5-year cumulative survival of 95.7% and a 10-year cumulative survival of 89.2%. These results showed that implant treatment is a predictable treatment option for patients with severe hypodontia. However, more marginal bone loss was seen in augmented regions and therefore severe hypodontia patients are in need for substantial aftercare.