Zestien jaar kunsthars bruggen

De levensduur van kunsthars bruggen blijft onderwerp van onderzoek. In een literatuuronderzoek zijn over een periode van 16 jaar bevindingen met bruggen, vervaardigd van verschillende materiaalsoorten, vergeleken.

De duurzaamheid van kunsthars bruggen blijkt beperkt, maar het materiaal veroorzaakt bij falen doorgaans weinig schade aan de pijlerelementen.

Excerpt

This literature review was designed to assess and compare the success rates and modes of failure of metal-framed, fibre-reinforced composite and all-ceramic resin-bonded bridges. A Medline search (Ovid), supplemented by hand searching, was conducted to identify prospective and retrospective cohort studies on different resin-bonded bridges within the last 16 years. A total of 49 studies met the pre-set inclusion criteria. Success rates of 25 studies on metal-framed, 17 studies on fibre-reinforced composite and 7 studies on all-ceramic resin-bonded bridges were analysed and characteristics of failures were identified. The analysis of the studies indicated an estimation of annual failure rates per year to be 4.6% (±1.3%, 95% CI) for metal-framed, 4.1% (±2.1%, 95% CI) for fibre-reinforced and 11.7% (±1.8%, 95% CI) for all-ceramic resin-bonded bridges. The most frequent complications were: debonding for metal-framed, resin-bonded bridges (93% of all failures); delamination of the composite veneering material for the fibre-reinforced bridges (41%) and fracture of the framework for the all-ceramic bridges (57%). All types of resin-bonded bridges provide an effective short- to medium-term option, with all-ceramic performing least well and having the least favourable mode of failure. The methods of failures were different for different bridges with metal frameworks performing the best over time

Bron

Miettinen M, Millar BJ. A review of the success and failure characteristics of resin-bonded bridges. Br Dent J 2013; 2: E3. doi: 10.1038/sj.bdj.2013.686.