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Use of wax spacers for putty-wash impression of implant snap-on impression copings
Use of wax spacers for putty-wash impression of implant snap-on impression copings Abbas Monzavi, DDS, MSc,a and Hakimeh Siadat, DDS, MScb Department of Prosthodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran Use of a custom tray with elastomeric impression material or a stock tray with a putty-wash method is recommended for making an impression of dental implants.1,2 For impressions of the transfer impression assembly, including the impression coping and positioning cylinder, a stock tray with putty impression material must be used to register an unmodified solid abutment.3 When abutments are prepared to provide adequate space for the restoration, relief of the putty impression material must be accomplished to provide sufficient space for the wash material. Inadequate space may result in displacement of the impression assembly and a distorted impression. The following technique can be used to provide space during the making of a putty impression for modified abutments.
PROCEDURE 1. Place an impression coping (ITI; Straumann, Waldenburg, Switzerland) over the solid abutment (ITI; Straumann) after abutment preparation. 2. Soften hard baseplate wax; (Modeling wax; Dentsply DeTrey, Konstanz, Germany) over a flame and add wax around and over the impression coping (Fig. 1). 3. Make an impression with putty-type impression material (GC Exaflex; GC United Kingdom, Newport Pagnell, UK) in a stock tray (GC Dentulous trays; GC United Kingdom). 4. Remove the impression from the mouth after polymerization of the impression material (Fig. 2). 5. Remove the wax and impression coping from the putty. 6. Remove the wax from the impression coping and reposition the impression coping intraorally. 7. Reline the impression with the light-bodied impression material (GC Exaflex; GC United Kingdom). The authors thank Dr A. Mirfazaelian, DDS, MSc, for his guidance and helpful suggestions.
REFERENCES 1. Kuo SB, Hong HH, Tsai TP, Shen YF. Developing an optimal emergence profile of the definitive restoration with a modified impression cap technique for ITI solid abutment. J Prosthet Dent 2002;88:646-8. 2. Mirfazaelian A. A transfer method for multiple cement-retained implant restorations. J Prosthet Dent 2002;87:692-4. 3. Kaiser DA, Jones JD. New impression system for ITI solid abutment cementable restoration. J Prosthet Dent 2000;83:276-8. a
Assistant Professor. b Assistant Professor. J Prosthet Dent 2005;93:494.
494 THE JOURNAL OF PROSTHETIC DENTISTRY
Fig. 1. Baseplate wax placed over impression coping.
Fig. 2. Impression coping captured in impression with baseplate wax.
Reprint requests to: DR HAKIMEH SIADAT DEPARTMENT OF PROSTHODONTICS SCHOOL OF DENTISTRY TEHRAN UNIVERSITY OF MEDICAL SCIENCES GHODS ST AND ENGHELAB ST TEHRAN, 141555583 IRAN FAX: (9821) 8737216 E-MAIL: [email protected] 0022-3913/$30.00 Copyright Ó 2005 by The Editorial Council of The Journal of Prosthetic Dentistry. doi:10.1016/j.prosdent.2005.03.003
VOLUME 93 NUMBER 5
PROCEDURE 1. Place an impression coping (ITI; Straumann, Waldenburg, Switzerland) over the solid abutment (ITI; Straumann) after abutment preparation. 2. Soften hard baseplate wax; (Modeling wax; Dentsply DeTrey, Konstanz, Germany) over a flame and add wax around and over the impression coping (Fig. 1). 3. Make an impression with putty-type impression material (GC Exaflex; GC United Kingdom, Newport Pagnell, UK) in a stock tray (GC Dentulous trays; GC United Kingdom). 4. Remove the impression from the mouth after polymerization of the impression material (Fig. 2). 5. Remove the wax and impression coping from the putty. 6. Remove the wax from the impression coping and reposition the impression coping intraorally. 7. Reline the impression with the light-bodied impression material (GC Exaflex; GC United Kingdom). The authors thank Dr A. Mirfazaelian, DDS, MSc, for his guidance and helpful suggestions.
REFERENCES 1. Kuo SB, Hong HH, Tsai TP, Shen YF. Developing an optimal emergence profile of the definitive restoration with a modified impression cap technique for ITI solid abutment. J Prosthet Dent 2002;88:646-8. 2. Mirfazaelian A. A transfer method for multiple cement-retained implant restorations. J Prosthet Dent 2002;87:692-4. 3. Kaiser DA, Jones JD. New impression system for ITI solid abutment cementable restoration. J Prosthet Dent 2000;83:276-8. a
Assistant Professor. b Assistant Professor. J Prosthet Dent 2005;93:494.
494 THE JOURNAL OF PROSTHETIC DENTISTRY
Fig. 1. Baseplate wax placed over impression coping.
Fig. 2. Impression coping captured in impression with baseplate wax.
Reprint requests to: DR HAKIMEH SIADAT DEPARTMENT OF PROSTHODONTICS SCHOOL OF DENTISTRY TEHRAN UNIVERSITY OF MEDICAL SCIENCES GHODS ST AND ENGHELAB ST TEHRAN, 141555583 IRAN FAX: (9821) 8737216 E-MAIL: [email protected] 0022-3913/$30.00 Copyright Ó 2005 by The Editorial Council of The Journal of Prosthetic Dentistry. doi:10.1016/j.prosdent.2005.03.003
VOLUME 93 NUMBER 5