Inlays and onlays are regarded as a long-term solution for fixing your teeth. In general they would be expected to last a similar number of years to crowns
(around 20 years) and considerably longer than conventional fillings
- provided they are done well and you keep your hygiene up to scratch.
As always when talking about how long things last, there are many factors to take into consideration in relation to:
- The dentist- Their experience, the materials used to make the inlay, the impressions taken, the cements used for bonding, technique etc.
- The lab technician- Their experience, the materials used, the quality of the work etc.
- The tooth- How much tooth remains, the state of the nerve, its support, biting forces etc.
- You- Access to the area, saliva control, oral hygiene etc
Long-term data is pretty scarce on this subject and as always, this research is fraught with the problems and difficulties of keeping the dentist and patient variables consistent to draw any meaningful results.