composite implant abutment analogs for solid casts
TRANSCRIPT
410 THE JOURNAL OF PROSTHETIC DENTISTRY VOLUME 87 NUMBER 4
Reprint requests to:DR HERMAN B. DUMBRIGUE
BAYLOR COLLEGE OF DENTISTRY
TEXAS A & M UNIVERSITY SYSTEM HEALTH SCIENCE CENTER
3302 GASTON AVE, ROOM 601DALLAS, TX 75246E-MAIL: [email protected]: (214)828-8952
Copyright © 2002 by The Editorial Council of The Journal of ProstheticDentistry.
0022-3913/2002/$35.00 + 0. 10/1/121631
doi:10.1067/mpr.2002.121631
Composite implant abutment analogs for solid casts
Herman B. Dumbrigue, DDMa
Baylor College of Dentistry, Texas A & M University Health Science Center, Dallas, Texas
The ITI solid abutment system (ITI DentalImplant; Straumann USA, Cambridge, Mass.) pro-vides a simplified impression procedure for cemented,implant-supported crowns and fixed partial dentures.Three components are typically used to make impres-sions with this system: an impression cap, a positioningcylinder, and an abutment analog. The impression capis placed over the abutment, engaging the implantshoulder, and the positioning cylinder is seatedthrough the impression cap. The impression cap andpositioning cylinder are picked up in the impression,an abutment analog is placed into the impression, andthe impression is poured in die stone. The impressioncap provides excellent tissue retraction,1 and the posi-tioning cylinder allows accurate positioning of theabutment analog in the impression.
When a second pour of the final impression isdesired for fabrication of a solid cast, additional abut-ment analogs are required. This tip describes a methodfor incorporating solid abutment dies into solid castswithout the need for additional abutment analogs.
PROCEDURE
1. Make an impression of the abutment analogs withvinyl polysiloxane (VPS) putty material (Extrude;Kerr, Romulus, Mich.).
2. Inject composite core material (Build-it;Jeneric/Pentron Inc, Wallingford, Conn.) intothe analog impression, and insert a Pindex pin(Coltene/Whaledent, Mahwah, N.J.) into theunset core material.
3. After the core material sets, retrieve the compos-ite abutment analog, and examine it for blebs andother inaccuracies (Fig. 1, A).
4. Place the composite abutment analog into thefinal impression (Fig. 1, B). The analog shouldsnap into place.
5. Inject low-viscosity VPS around the exposedimpression cap to simulate soft tissue contours inthe solid cast. Pour the impression in die stone.
REFERENCE
1. Jones JD, Kaiser DA. A new gingival retraction impression system for aone-stage root-form implant. J Prosthet Dent 1998;80:371-3.
aAssistant Professor and Assistant Program Director, AdvancedEducation in General Dentistry.
J Prosthet Dent 2002;87:410.
Fig. 1. A, Composite abutment analog (right) fabricated fromimpression of solid abutment analog (left). B, Impressionwith composite abutment analogs in place for fabrication ofsolid cast.
A
B