Implant Crown Materials: Any Difference in Force Transmitted to Implant Fixture?

Dr. S. asks:

We have many materials available to either form crowns or to cover a metal understructure (coping). Is there any difference in terms of force transmitted to the implant fixture? If the crowns are made of Targis/Vectris, for instance, since this is a softer material [Ed. Lower modulus of elasticity] than porcelain fused to metal, will this absorb some of the forces that would normally be directly transmitted to the implant fixture. We used to use porcelain teeth for dentures but most have now switched to acrylic because this results in less force transmission to the maxilla and mandible, reducing bone resoription in the long term. Should we consider similar paradigms for restoring implants with crowns and bridges?

3 thoughts on “Implant Crown Materials: Any Difference in Force Transmitted to Implant Fixture?

  1. gandhi says:

    i prefer acrylic only for full mouth restoration or for multiple ones rather than PFM for cementable bridges from my experience of last 20 years for implant restoration.Acrylic has been kind in load compared to PFM.Acrylic has proved poor in strength.Still it is preferred and can be replaced as and when required.For hybrid one/ screw type one PFM is good.

  2. James Earthman, PhD says:

    The problem with acrylic is that its wear resistance is relatively low. We found using in-vitro and in-vivo percussion measurements that the shock absorption (damping capacity) of both Belleglass and Gradia composite materials give rise to damping that approaches that for acrylic [1] while providing much better wear resistance. Based on an earlier in-vitro study using both percussion and load cell measurements [2], the increase in damping capacity associated with switching from either cast gold or PFM to one of these composites should correspond to about a 50% reduction in transmitted force.

    1. A. Barzin, C. G. Sheets, and J. C. Earthman, “Mechanical Biocompatibility of Dental Implant Materials,” Proceedings of the 4th Pacific Rim International Conference on Advanced Materials and Processing, (PRICM4) S. Hanada, Z. Zhong, S. W. Nam, and R. N. Wright, eds., The Japan Institute of Metals, 2949-2952 (2001).

    2. C. G. Sheets and J. C. Earthman, “Tooth Intrusion in Implant-Assisted Prostheses,” Journal of Prosthetic Dentistry, 77, 39-45 (1997).

  3. Alejandro Berg says:

    While doing my Thesis in Biomechanical aspects in implant restoration I had to research a lot over this and the final result was that there is no significant difference. In europe today the tendency is to use full zirconia abutments and crowns and there is hardly anything harder and stiffer than that.
    The use of resisns has been the branemark way for 45 years in admodum systems, I use it to, but for single units or bridges I use zirconia or pfm. In the end the thing that will set you appart and get you success is the correct occlusion but most of all and most important will be the disocclussion.
    best of luck


Leave a Comment:

Comment Guidelines: Be Yourself. Be Respectful. Add Value. For more details, read our comment guidelines. Though we require an email to comment, we will NEVER publish your email.
Required fields are marked *

Posted in Clinical Questions, Crowns and Bridges, Restorative.
Bookmark Implant Crown Materials: Any Difference in Force Transmitted to Implant Fixture?

Videos to Watch:

Maxillary Bone Reconstruction

This video demonstrations Maxillary Bone Reconstruction using Subnasal Floor Elevation and an Osteotome Closed Approach[...]

Watch Now!
Infection of Lower Premolar: Extract and Place Implant

In this video, the lower left 2nd premolar was extracted due to infection, and implants[...]

Watch Now!
Flapless Immediate Implant and Provisional

This video shows a technique showing using the patient's own tooth as a provisional at[...]

Watch Now!
Extraction and Immediate Implant with Luxator LX

Extraction of tooth #8, using Luxator LX, and then an immediate implant and provisional.[...]


Watch Now!
Dealing with the Implant Gap

This short video discusses how to best deal with the gap after immediate implant insertion[...]

1 Comment

Watch Now!
Lower Right Molar Extraction & Immediate Implant Placement Using i-PRF

In this video, the lower right second molar was extracted and grafted with i-PRF and[...]


Watch Now!
Maxillary Implantation with Treatment of Chronic Sinusitis

This video shows two cases where implants were placed following treatment of Sinusitis. [...]


Watch Now!
Suturing in Guided Bone Regeneration

This video provides clinical tips for suturing techniques in Guided Bone Regeneration. In Guided Bone[...]

1 Comment

Watch Now!
Socket grafting with Collagen Dressing and Bond Apatite

This video demonstrates socket grafting with just bond apatite and a collagen wound dressing.[...]

Watch Now!
Dental Implant for Lower Right Second Molar

This video shows implant placement on the lower right second molar.[...]

Watch Now!
Saving a Bridge with Periodontal Therapy

This video shows a case involving a 48-year-old male who was referred for periodontal treatment[...]

Watch Now!
Immediate Loading Full Arch

This video shows a case of Immediate loading of a full arch with simultaneous guided[...]

Watch Now!