Complete crowns constructed for an existing partial denture

Fabricating crowns that fit both an implant and an existing removable partial denture

Fabricating a crown to fit both a tooth and an existing removable partial denture (RPD) using many different techniques has been described. However, in the event of abutment loss, information regarding the clinical and laboratory steps used to fabricate a crown that fits both an implant and an RPD is lacking. This report describes the use of either an impression coping or an interim abutment attached to the implant to which a composite resin interim restoration material is flowed and the RPD then seated to form a resin pattern of the required crown form. The process allows the implant crown to be made without retaining the patient's RPD during crown fabrication.

Using the foundation restoration as a blueprint: An uncomplicated approach to retrofitting crowns to existing removable partial dentures using CAD-CAM technology

Removable partial dentures have been used to rehabilitate partially edentulous patients for decades. A challenging but commonly encountered procedure is retrofitting a crown to an existing removable partial denture. Several techniques have been proposed for fabricating these complex prostheses, some involving the intraoral application of polymers to the abutment tooth or making impressions of the preparation with the removable prosthesis seated. The present technique presents an approach that simplifies the design and fabrication of retrofitted crowns for fractured abutment teeth needing foundation restorations. This approach involves the implementation of computer-aided design and computer-aided manufacturing technology to record and utilize the contours of the foundation restoration established intraorally as a blueprint for the retrofitted crown.

The use of intraoral scanning and 3D printed casts to facilitate the fabrication and retrofitting of a new metal-ceramic crown supporting an existing removable partial denture

Fabricating a new crown to retrofit with an existing removable partial denture (RPD) is a complex procedure for both clinician and dental laboratory technician. The presented technique facilitates the fabrication and retrofitting of a metal-ceramic crown onto the principal abutment of the existing RPD by using 2-step intraoral scanning (with and without the RPD in place) and 2 different 3-dimensionally printed casts. The technique enables the dental laboratory technician to precisely reproduce the retentive areas, guiding planes, and rest seats on the retrofitted crown.

Fabricating a crown under an existing removable partial denture with impression scanning and CAD-CAM technology

Retrofitting a new crown to an existing removable partial denture (RPD) is a challenging procedure. Recently, intraoral scanners (IOSs) have been successfully used to solve this issue. However, purchase of IOSs is necessary, and most clinicians still use the conventional impression technique. This article describes a combined conventional and digital approach to fabricating a new crown under an RPD without an IOS.

A procedure for fitting a fixed partial denture to an existing removable partial denture

An indirect technique for fitting a new cast gold crown or fixed partial denture (FPD) to an existing removable partial denture (RPD) is presented. This method uses an acrylic resin coping made on a definitive cast fit directly to the patient's RPD intraorally, with the new FPD subsequently completed on the cast. The patient does not have to relinquish the RPD for laboratory procedures, although an appointment is required to fit the coping intraorally where contact is made with the RPD.

Retrofitting crowns to an existing removable partial denture clasp: a simple technique

The fabrication of a new crown to replace an existing abutment tooth for a removable partial denture is one of the most labor-intensive chairside and laboratory procedures. The process can become more complicated when the patient requests a tooth-colored esthetic restoration. Numerous techniques are described in the literature, some for all-metallic restorations and others for metal-ceramic restorations. This article describes a simplified technique that makes use of a polymer ceramic material.

Making a crown to fit accurately under an existing removable partial denture clasp assembly

The most difficult aspect of retrofitting a new crown to an existing removable partial denture clasp assembly is maintaining an accurate relationship of the prepared abutment tooth to the clasp assembly while making an impression. A procedure is presented that helps to ensure that the framework is not displaced during this critical step of the process.

Fabricating crowns to fit existing removable partial dentures: an illustration of two techniques

The prosthetic treatment of a structurally compromised abutment tooth supporting a removable partial denture may present a variety of restorative modalities. Ideally, a surveyed crown is made for the individual tooth, which is later followed by a new removable partial denture fit to the contours of the crown. Frequently, however, the removable partial denture is clinically acceptable, and remaking the prosthesis is not indicated. In these cases, the crown can be made to fit the existing removable partial denture. Fabricating crowns to fit existing removable partial dentures can be accomplished using a direct method, an indirect method, or combinations of these techniques. Direct techniques traditionally use acrylic resin and inlay wax intraorally to develop a custom pattern that captures the contours of the clasp assembly. Indirect techniques use a pick-up impression to allow the crown pattern to be waxed against the denture framework on a cast in the laboratory. Combination methods use either a direct-indirect or indirect-direct approach. The direct-indirect method develops the preliminary resin pattern directly on the tooth and finalizes the contours in wax on a master cast. The indirect-direct technique initiates a crown pattern on a die and completes it either intraorally or on the die after the intraoral refinements. This article reviews the literature for methods of fabricating surveyed crowns under existing removable partial dentures. Additionally, two cases are presented that illustrate an indirect and combination direct-indirect technique for making the restorations.

An indirect procedure for making a crown under an existing partial denture

Direct procedures to make a crown under an existing partial denture are inconvenient for the patient. A process is described that uses an irreversible impression of both the crown preparation and the removable prosthesis to fabricate a crown indirectly. The process is efficient and inexpensive.

Cast restorations made to existing removable partial dentures

Procedures for the fabrication of complete cast and ceramometal restorations that support existing removable partial dentures are reviewed. Clinical and laboratory procedures are presented. These techniques allow the patient to continue to function with the existing removable partial denture while the restorations are made.

A review of techniques of crown fabrication for existing removable partial dentures

Fourteen methods for making a crown to fit an RPD have been described. The techniques have been briefly reviewed and classified to indicate whether crown pattern construction is direct, direct-indirect, or indirect, and whether the RPD is needed in the laboratory phase. The choice of a technique appears to be a matter of personal preference for the dentist.

The fabrication of a ceramic-metal crown to fit an existing removable partial denture clasp

An indirect-direct technique of fabricating a ceramic-metal crown to fit a removable partial denture clasp has been described. The chief advantage of the technique is that the entire procedure can be performed without depriving the patient of the prosthesis.

The construction of a crown for clasp-bearing teeth

A method is described for the fabrication of clasp-bearing crowns. The technique involves the preparation of a thin gold transfer coping, on to which the bulk of the crown is cast in a later stage.

Constructing cast crowns to fit existing removable partial denture clasps

A step-by-step procedure has been presented for fabrication of a cast crown to fit an existing partial denture clasp. The procedure can be accomplished in two appointments, and the patient need not be subjected to the incovenience of being without the partial denture between office visits. It is an accurate and easy technique which gives uniform results and eliminates the need for remaking an adequate removable partial denture.