onlay or crown: % of molar visible for successful onlay?

Thank you for your reply; and fyi, the link above doesn't work but the information is available elsewhere. What is still unclear to me is how much damage a tooth can sustain before a crown is a better solution than an onlay, and I cannot find details about this on your site? With one dentist recommending an onlay (Lithium delicate), which I'd prefer because less tooth is removed, and the other a crown (PFM w/ high noble metal) and possible root canal (outsourced), depending on what lies beneath the remaining amalgam and decay once removed, it's hard to know if dentist 1 is optimistic (onlay) and dentist 2 greedy (crown), or if both proposal would work well and for as long? FYI, a cusp is gone and the amalgam filling was big and well over 10 years old before the 2 pieces broke off separately last month (a small piece of amalgam with tooth chip first, a big chunk of amalgam w/ no tooth weeks later). This was a first visit to new dentists (acquaintance recommendations), and dentist 1 (onlay) offered his proposal after bite-wings and a visual, and dentist 2 after an intraoral-periapical x-ray and visual (plus a glance at the bite-wings I brought on a digital key); the hole is large and the bite-chewing molar (#15) is missing a cusp. Again, thanks for any illumination to help decide which dentist to make an appointment with (!).

Editor's note: This question applies to information on this page, so we have reproduced it here and removed it from its original post location.

Plain text

  • No HTML tags allowed.
  • Lines and paragraphs break automatically.
Please answer the question so we know you're a human.