Telescopic Crowns
Connecting an implant abutment with a natural abutment in dental restoration is not an ideal option. However, there are rare circumstances where such a connection may be necessary. In such instances, we recommend using telescopic primary and secondary copings. In this case study, #7 and #10 are implant abutments, #9 is a natural abutment, and #8 is a pontic. The patient declined to have an implant placed on #8.
Shock-Absorbent Cements for Telescopic Crowns Between Implant and Natural Abutments
When fabricating a telescopic crown system that connects an implant abutment and a natural tooth abutment, especially when using a primary (inner) and secondary (outer) crown system, using a shock-absorbent or elastic resin cement between the secondary crown and the primary coping can help mitigate stress caused by the different mobility of natural teeth and rigid implants.
This is particularly important in tooth-implant-supported prostheses because:
- Natural teeth have periodontal ligament mobility (~100 μm)
- Implants are ankylosed and do not move (~5 μm max)
- So, without some elastic compensation, overloading and potential failure may occur at the implant or bone interface
Recommended Space Between Primary and Secondary Telescopic Crowns
The ideal gap or clearance between the inner crown (primary) and the outer crown (secondary) in a telescopic crown system depends on the materials used and the retention strategy. When utilizing shock-absorbent resin cement, a clearance of 30 to 100 micrometers is recommended. This allows for the thickness of the resin and its elastic modulus, which is particularly important for tooth-implant bridges, as it accommodates necessary movement.
An Implant Dental Laboratory
The Art of Aesthetics is a dental laboratory specializing in implants, servicing clients worldwide with free shipping to our regular and high-volume clients. We utilize expedited shipping services, ensuring our delivery method is both fast and secure. If you have a digital intraoral scanner, it is even more efficient and reliable. In most implant restorations, please allow us at least 3 weeks to accurately and properly restore from crowns and customize implant abutments.
