Implant Dentistry: Volume 13(4) 2004 pp 322-327
Rosen, Harry DDS*; Gornitsky, Mervyn DDS
Lippincott Williams & Wilkins
Abstract
Cement-retained implant-supported prostheses are particularly indicated where access for screw placement is limited or impossible like in posterior locations or where there is limited jaw opening. The patient in this case report suffered from limited jaw opening as a result of a long history of temporomandibular joint ankylosis related to hemophilia. Cement-retained implant-supported prostheses coupled with serial extraction, serial implant installations, and chairside provisional restorations made uneventful treatment possible.
Cementable implant-supported prostheses continue to gain popularity within the profession. Simplicity and predictability make them the restorations of choice.1 They are particularly indicated where access for prosthetic screw placement is limited or impossible, like in posterior locations or where there is limited jaw opening. The patient in this case report suffered from limited jaw opening as a result of a long history of temporomandibular joint ankylosis.
The advantages of cement-retained implant-supported prostheses over screw-retained prostheses are2:
1. Better connection strength; the prosthetic screw is eliminated. That screw is smaller than the abutment screw and becomes the weakest link with possible resultant loosening and fracture.3-8
2. Passive fit. Although passive fit is not necessarily achievable on metal-to-metal together with positive seating everywhere, such precision is not required for conventional full crown restorations. Retentive full crowns assume an impeccable fit on cementation only at the terminations of the preparations with relieved spaces within the crowns taken up by cement.
3. Better occlusion is possible without screw access opening.
4. Less porcelain fracture without screw access opening.
5. Enhanced esthetics is feasible-the abutment preparation can be improved intraorally when desired.
6. Progressive loading is easier to achieve. Cementable acrylic temporary restorations are easier to adjust and add to or remake at the chairside than screw-retained laboratory-constructed temporaries.
7. Immediate chairside provisionalization is possible.
8. Fixture parallelism is not required.
9. User-friendly because techniques are familiar for both dentist and laboratory technician.
10. Reduced armamentarium and reduced costs.
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dr.shahid choudhry dental surgeon - email shahid.choudhry@live.com says: | 2010-04-07 12:58:33 |
| the vision of bone cement implants is a great fascination, i thought about this version of implants while working as a anesthetist in orthopedics ,if femurs , hip joints , tibia, prosthesis can be retained for many years, why a dental implant cant live.kindly spread this simple knowledge world wide for the poor humans, i will like to be in touch on this project. |
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