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EXTRACORONAL ATTACHMENTS FOR REMOVABLE PARTIAL DENTURES

 

Extracoronal precision attachments for removable partial dentures are recommended when:
  1. Less tooth reduction is required. Retaining abutments are small to avoid over-contoured intracoronal attachment abutments and/or pulpal exposure.
  2. Extracoronal precision attachment are traditionally easier to insert and remove. These are used for patients with limited manual dexterity, or the prosthesis has a difficult path of insertion and removal.
  3. The patient does not always wear the removable prosthesis. Intracoronal females in retaining abutments will collect food and present problems when the patient attempts to seat the intracoronal retained prosthesis.

Extracoronal Precision attachments are normally resilient to allow free movement of the prosthesis to distribute potentially destructive forces or loads away from the abutments to supportive bone and tissue. Three distinctive movements are defined in function: (1) Hinge, (2) Vertical, and (3) rotational.

The fewer abutments remaining, and the weaker the abutments are, the greater the need for resiliency or free movement to direct the forces away from the abutments to the supportive bone and tissue via the base of the prosthesis.

 

Preci Clix

A new idea in removable partial dentures, overdentures, and implant bars.

30, 45, and 60º female patterns allow for improved hygiene-- open embrasures and light gingival contact.

Audible *click* for patient security when prosthesis is engaged.

Either a prefabricated smooth ball, or castable ball with cup bur to finish the casting.

Limited vertical requirements.

2.25mm Ø male ball. 

 

Ceka Attachments

 

Ceka Revax

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Ceka Revax

Ceka Classic

The Traditional Ceka and Ceka Revax systems provide for hinge, vertical, and rotational movements to provide maximum abutment protection. Each attachment consists of three angulations of plastic female profiles with precision metal insert, male spring pin, and retention component. The three angulations allow the user to design the case for the patient’s needs. Please specify the alloy of choice: Red is Irax, for precious/semi-precious; Blue is Noprax, for non-precious; and Yellow is Platirax for all alloys. Also specify the type of retention for the male spring pin: acrylic, solder, or spacer.

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Preci Vertix

Preci Vertix "P"

Preci Vertix Instructions

The Preci Vertix and Vertix "P" provides for hinge and vertical movements. It should be supported by a broad based ridge. The Vertix is a very inexpensive and popular system that provides patient comfort and abutment protection for both mandibular and maxillary bilateral removable partial dentures. Unilateral free end removable partial dentures should be cross arch stabilized.

The Vertix features time-saving and simple routine techniques, requires no additional tools, may be cast in any alloy to eliminate soldering and dissimilar alloys, and provides outstanding space-saving aesthetics. The plastic female absorbs negative movements to protect abutments and provide patient comfort. It requires only a routine full coverage abutment preparation and provides easy patient insertion and removal. The only servicing requirement is the occasional, fast, easy female replacement. Three different female retention clips are available to accommodate all your retention needs. Also, the new green castable hood allows the user to have a crown, or pontic, where traditionally the undesirable denture tooth is. The Preci Vertix P Combo kit comes with all the tools and components you need to do two units.

Instructions for Pre-Cast Vertix Hood

Case Study using Preci Vertix P

 

 

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Preci Vertix "P"                        Preci Vertix    

Preci Vertix AT

Extracoronal slide attachment.  Burn-out plastic male.  The friction of the titanium female can be progressively adjusted with screw and plastic friction part.  Excellent attachment for lateral stabilization.

Total height: 4.40mm. 

May be reduced by 1.00mm at tissue side.

 

 

CSA

CSA Instructions

Castable Spherical Attachment for extracoronal partial dentures and overdenture bars.

 

 

 

O-SO Distal Extension

View OSO O-Ring Size Chart

The OSO is a popular extracoronal attachment that provides free movement in all planes for maximum protection. A proven retentive system utilizing an easily replaceable rubber O ring. This is a resilient attachment with vertical and hinge stress-breaking action for free-end and bounded partials. May be used in conjunction with other attachments.

The metal retainer ring is sold separately.

 

 

 



O-SO Distal Extension Attachment
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Universal IC Attachment

The IC attachment is a popular spring loaded retaining attachment that provides free movement for abutment protection without requiring an abutment crown. The IC attachment requires a 180 degree reciprocal lingual arm. The attachment consists of a male anchor and female inlay. It is made of a stainless, chrome-alloy like those used for casting partials. It will not tarnish or corrode, and when properly installed, will not malfunction even after years of wear. Other benefits include no pulpal involvement, no gingival retraction before impressions, easy to adjust at the chair, and this is a reversible procedure.

  • Universal Male: 5.2mm length, 2mm Ø, 1mm nose
  • Universal Female: 2mm Ø, 0.8mm deep

 


 

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IC Attachment

 

 

DSE Hinges

Bio-Mechanical Considerations in the use of Distal Stress Equalizers (DSE) in Partial Denture Restoration

The DSE Hinge is intended for use on bilateral clasp retained free end removable partial dentures to reduce loading or torquing of abutments. The small size is easy to work with and eliminates multiple inventory requirements. The unique design provides for easy freeing after casting and provides total lateral stability. For patients, it allows patient comfort and abutment protection by allowing independent unilateral function eliminating torquing leverage on the abutments on the nonfunctioning side. The miniaturized size allows utilization in short vertical spaces and provides for good esthetics.

Quantity Rates at 12, 24, and 100


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DSE Hinges

 

Mays Unilateral Attachment

Designed specifically for the unilateral distal extension, the Mays is the first attachment with a lingual locking arm.  It can not be dislodged, but yet is easily removed for patient hygiene.  3mm vertical required.   Specify Upper Left/Lower Right, or Upper Right/Lower Left.

Does not require a lingual or palatal arm.  No cast chrome framework required or soldering; the male portion casts with the crowns.  No parallelism is necessary, even on bilateral cases.

 

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Mays Unilateral

Sphero RetroFit Kit

Ideal for replacing worn extracoronal attachments, such as the ERA or Ceka.  Kit of 2 with all necessary components.

 

 

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