One clinical visit for a multiple implant restoration master cast fabrication☆,☆☆,★,★★
Section snippets
CLINICAL PROCEDURE
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Seat a square transfer coping on each implant and secure it with a long screw. Confirm the seating by radiography.
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Weave dental floss among the square transfer copings and apply acrylic resin material (GC Corp., Tokyo, Japan) or light-cure composite with a brush or small spatula to join all transfer copings. The floss acts as a matrix for the resin.
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Unscrew the transfer copings and remove them from the mouth. Section the resin between each transfer coping with a thin disk and reseat the transfer
LABORATORY PROCEDURES
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Attach an implant analog to each impression coping embedded in polyvinyl siloxane impression material.
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By using a brush or cement spatula, join the apical portion of the analogs securely with impression plaster.
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After the impression plaster sets, section each interproximal space with a thin disk. Soak it for a few minutes in slurry water and rinse it out. Then proceed to rejoin the separations with a second mix of impression plaster (Fig. 2). Rewet the plaster before adding the new mix, otherwise
DISCUSSION
Even though the procedure that uses an open top tray and acrylic resin to splint the transfer copings is considered to be the most accurate method,16 there is usually a detectable gap observed between the implant head and the prosthesis framework. For this reason, an intraoral soldering index needs to be made routinely.
Two master casts were fabricated with the same impression, which was made by using an open tray, luting the impression copings, sectioning them, and then rejoining them. The
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Cited by (21)
Comparison of the accuracy for three dental impression techniques and index: An in vitro study
2013, Journal of Prosthodontic ResearchCitation Excerpt :Therefore, there is improved efficiency, a reduction of chair time and greater transfer precision due to the splinting stability. If the final prosthesis is fitted on the index, then, a clinician should trust that it would most likely fit a patient's mouth [34]. This would be advantageous, since passive adaptation of the implant abutment to the framework is often difficult to achieve and to interpret in a clinical setting [35].
Effect of subgingival depth of implant placement on the dimensional accuracy of the implant impression: An in vitro study
2008, Journal of Prosthetic DentistryAlternate functional impression technique for implant-retained overdentures
2007, Journal of Prosthetic DentistryDimensional changes of one-piece frameworks cast from titanium, base metal, or noble metal alloys and supported on telescopic crowns
2003, Journal of Prosthetic DentistryPrefabricated acrylic resin bars for splinting implant transfer copings
2000, Journal of Prosthetic DentistryIntroducing a method to facilitate making acrylic resin bars for splinting multiple implant impression copings
2018, World Journal of Dentistry
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aProsthodontic Resident and Graduate Student, Department of Prosthodontics and Biomaterials.
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bProsthodontic Resident, Department of Prosthodontics and Biomaterials.
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Reprint requests to: Dr. Tanya Wong, UMDNJ Dental School, Department of Prosthodontics, 110 Bergen St., Newark, NJ 07103
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10/1/85707