Chrome

Spider Chrome Framework

Here at McDowell + Service we pride ourselves on our attention to detail and that is why we only use the best CE materials and by adopting the BEGO system we produce high quality precision frameworks.
Our chrome frameworks are cast using BEGO’s Wironium® Alloy which exceeds all International Standards and allows us to produce very fine but strong dentures which resist even the highest of masticatory forces.

For greater accuracy, we always recommend a special tray impression, taken in either rubber or alginate. Finished frameworks are returned on the master model to ensure the accuracy of our work.

We are proud to be members of the International Wironium Circle which is a worldwide association of leading dental laboratories which share a single goal to provide first-class dental work using top-quality materials.
The high standards of quality demanded from I.W.C. member labs, ensure the reliability which dentists and patients require. Regular training, conferences, and symposia keep IWC members informed and at the leading edge of their industry.

Know-How Training and collaboration keep I.W.C. laboratories ahead of the competition. Laboratories who display the I.W.C. symbol demonstrate that they use the best materials and cutting-edge knowledge and equipment. If requested, we can provide complimentary patient information and custom framework designs, for surgeon or patient approval.

The System we use is Bego’s Partial Denture Technique
Wironium alloys are processed in a special, carefully matched chain of materials using the proven BEGO cobalt-chrome system. Dentists prefer Wironium frameworks because of better fit, guaranteed reliability, comfort, and durability for the patient.

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  • Restoration Types

  • Technical Information

  • FAQS

  • Cobalt Chrome Framework with Precision Attachment
    Cobalt Chrome Framework with Precision Attachment
    Cobalt Chrome Framework with Kennedy Clasping
    Cobalt Chrome Framework with Swinglock Hinge
    Cobalt Chrome Framework with Hidden Clasp
    Cobalt Chrome Framework
    Cobalt Chrome Framework with Hidden Clasps
    Chrome Spider Denture

    Cobalt Chrome Frameworks

    We pride ourselves on our attention to detail and that is why we only use the best CE materials and by adopting the BEGO system we produce high quality precision frameworks. Our chrome frameworks are cast using BEGO’s Wironium® Alloy which exceeds all International Standards and allows us to produce very fine but strong dentures which resist even the highest of masticatory forces.
    We feel our choice of alloy satisfies the restorative requirements important to dentists, including biocompatibility and resistance to breakage. Wironium® alloy is nickel and beryllium free and so suitable for patients who are otherwise susceptible to allergic reactions.

  • Gold Frameworks

    Gold Frameworks

    For those patients who demand the highest aesthetics and class their denture as an intricate piece of jewellery we produce a gold framework. These frameworks are cast from Argenco 27 (Gold) and are naturally very biocompatible due to their high precious gold content. Gold frameworks have a highly polished surface and so are extremely aesthetic and resistant to plaque and bacteria.

  • Titanium Equipoise Design
    Titanium Skeletal Framework
    Titanium Skeletal Framework with Backings
    Titanium Full Upper Framework
    Titanium Full Upper Framework

    Titanium Frameworks

    Our Titanium Denture Frameworks are ideal for patients with allergies to metals due to titanium’s high biocompatibility, they are more successful when used for full plates or simple lightweight designs. Appearance is much like Chrome although not as high a shine.

  • Acetal Resin Clasp on Demo Model
    Acetal Resin Double Arm Clasp
    Acetal Resin Ring Clasp
    Acetal Resin Ring Clasp
    Acetal Resin Clasps for Acrylic Denture
    Acetal Resin Clasps for Acrylic Denture
    Acetal Resin Clasps for Acrylic Denture
    Anterior view of Acetal Resin Clasps

    Acetal Resin Tooth Coloured Clasp

    ​ Acetal Resin tooth coloured clasp.

    These highly flexible, retentive clasps can engage deep undercuts which are not possible with metal clasps offering greater aesthetics. They come in all Vita shades and can be added to existing dentures.
    Acetal Resin is a thermoplastic technopolymer with a monomer-free crystalline structure. There are many benefits to using it instead of acrylic resins and metals in many prosthetic applications.

    Key Features & Benefits:

    High abrasion resistance
    Excellent tensile and shock strength
    High elastic memory
    Low thermal conductivity and rigidity
    Non-allergenic, non-toxic
    Remains stable even with exposure to a 4-9 ph range, chemicals, humidity, repeated stress etc.
    Available in 20 colour shades keyed to the Vita Shade Guide, plus 3 pink gum.

  • Acetal Resin Bridge 1
    Acetal Resin Bridge 2
    Acetal Resin Bridge 3
    Acetal Resin Bridge 4

    Acetal Resin Bridge

    ​Acetal Resin Bridge includes retentive clasps. This type of bridge can also be used as a temporary and is constructed all in one unit, also supplied in all Vita shades. The benefits are the same as Acetal Resin clasps both being thermoplastic technopolymers with a monomer-free crystalline structures.

  • Crown with Distal Rhein Attachment
    Milled Crowns with Rhein Attachment
    Rhein Caps & Attachments Table
    Rhein Attachment

    Attachments for Denture Frameworks

    Rhein Attachment.

    The Rhein attachment from Rhein33 USA would be our most popular attachment for use with dental frameworks. This overdenture attachment is a stationary ball implant attachment which comes in 2.5 mm and 1.8 mm diameters. It can be used in combination with posts or crowns. It has been designed to correct angulation issues between implant abutments.

    The female component of the attachment is a nylon cap which is incorporated into the denture, snapping over the ball to help prevent wear and increase retention. Rhein nylon caps come in a variety of colours based on their retentive nature. These nylon caps can be retained within the dental framework itself or cold cured into the acrylic chair side. If worn out, the nylon caps can easily be replaced.

  • Locator Framework
    Locator
    Locator System

    Locator Attachments

    Locator Attachments (from ZestAnchors)

    These can be incorporated into the acrylic denture, the denture is usually constructed clear of the locator attachments. The attachment can be added into the acrylic chair side ensuring an accurate fit.

  • Laser Welded Metal Extention
    Laser Welded Metal Extention
    Laser Welded Gold Glasp
    Laser Welded Gold Clasp
    Laser Welded Metal Crown

    Laser Welding

    Laser Welding

    Any dental material with a high melting point as well as
    high heat conductivity can be welded using our laser. Due to the small amount
    of molten material needed and the short, controllable melting period we can
    usually weld just about anything to anything, even adding retention and clasps
    millimeters from acrylc work, without affecting it.

    The Laser beam provides a concentrated heat source,
    allowing for narrow, deep welds with greater strength than the material. The
    laser welder polishing setting enables us to create virtually seamless weld
    joints.

  • Wironium Cobalt Chrome Alloy
    Cobalt Chrome Composition
    International Wironium Circle

    Wironium®  Cobalt Chrome Alloy

    International Wironium Circle members use BEGO’s Wironium, Wironium plus, and Wironium extra-hard - the world’s best RPD alloys. These alloys satisfy the restorative requirements important to dentists, including bio-compatibility and resistance to breakage. I.W.C. laboratories are the only labs in the world able to process Wironium alloys.

    Our Wironium® Alloy exceeds all International Standards and allows us to produce very fine but strong dentures which resist even the highest of masticatory forces.
    We feel our choice of alloy satisfies the restorative requirements important to dentists, including biocompatibility and resistance to breakage. Wironium® alloy is nickel and beryllium free and so suitable for patients who are otherwise susceptible to allergic reactions.​

  • Combination Denture

    Combination Dentures

    We are a full service laboratory and even the most technical combination work can be planned and manufactured by our experienced technicians from all departments.

    Combination dentures can include Crowns, Slide Attachments, Rhein, Locator or Magfit Attachments.

Acetal Clasps

(From Pressing Dental, Technical Information)
“The “TSM ACETAL DENTAL” is a thermoplastic technopolymer with a monomer-free crystalline structure and is a product of formaldehyde polymerization. Its characteristics are: high resistance to abrasion, excellent tensile and shock strength, high elastic memory, low thermal conductance and rigidity. Furthermore, it is neither allergenic, nor toxic. These features, coupled with remarkable aesthetic performance, make “TSM Acetal Dental” a good substitute for acrylic resins and metals in many prosthetic applications. The above-mentioned features remain stable under different operational conditions such as: exposure to a 4 - 9 PH range, chemicals, humidity, cyclically repeated stresses, etc.”

Locator Attachments

(from ZestAnchors)
“Until now, choosing a narrow diameter implant often meant a sacrifice in attachment performance and ultimately patient satisfaction. In order to provide patients with the quality of care that they desire, an increasing number of clinicians are now recognizing the unique benefits of using the next generation of narrow diameter implants for retaining overdentures.

The LOCATOR Overdenture Implant System (LODI) comes complete with the world’s leading overdenture attachment. LODI has answered clinician requests and patient demands for a less invasive, predictable and cost conscious technique for securing dentures.
The LODI system now allows you to treat patients with the minimum standard of care of an implant supported overdenture,* at a reduced cost and with greater satisfaction”.
*The McGill Consensus Statement on Overdentures, Montreal, Quebec, Canada. May 24-25 2002

Download Technical Information

What is the turnaround time for a chrome framework?

​We usually ask for 5 working days in the lab, but the work is dispatched upon completion.

What type of impression material should I use?

For best results a special tray impression in either alginate or silicone, whatever you feel can produce the most accuracy.

Alginate Impression Rubber Impression
Alginate Impression Silicone Impression

My patient is allergic to nickel, beryllium etc. Could they still wear a framework?

Wironium Alloy
Wironium Alloy

Yes, our Wironium chrome framework alloy is nickel and beryllium free.

Can I get a list of materials and breakdown of composition?

​ Yes, all our safety data sheets and material composition are in our technical information section or Downloads section.

I have a chrome denture which has fractured. Can you repair it?

Laser Welded Joint
Laser Welded Joint

Yes, we can laser weld fractures, breaks and in some cases extend chrome dentures.

Is it possible to laser weld more retention for additional teeth?

​

Laser Welded Extention
Laser Welded Extention

Yes, in most cases we can weld on tooth retention or weld a custom cast metal extension to retain additional teeth.

My patient doesn’t like her anterior metal clasps. Is it possible to hide these?

​

Acetal Clasp
Acetal Clasp

Where possible, we can replace these with acetal resin tooth coloured clasps. If this is not possible due to space limitations, we can simply mask the metal with a tooth coloured opaquer.

This patient’s chrome denture is not as retentive as it used to be. Can anything be done?

​ We can usually add additional clasps, either wrought, stainless steel, gold or even acetal tooth coloured clasps.

What exactly are acetal resin clasps?

​

Acetal Resin Tooth Coloured Clasp
Acetal Resin Tooth Coloured Clasp

They are aesthetic flexible, retentive, tooth coloured clasps which come in all Vita shades.

Do acetal clasps break ?

​They are very successful but like anything, when they are pushed beyond their elastic limits or exposed to corrosive cleaners, it is possible for them to weaken and break. They are replaceable.

Can you replace a metal clasp with an acetal clasp?

​In most cases we can if there is enough room and where there is a saddle or acrylic tooth next to the clasp location.

Is it possible to add an acetal clasp to an existing acrylic or chrome denture?

​Yes, if there is enough room and where there is a saddle or acrylic tooth next to the clasp location.

Is it possible to have gingival approaching acetal clasps on a denture?

​ We only recommend occlusal approaching as they are more successful and aesthetic.

My patient requires crowns and a chrome denture. Would rhein attachments have enough retention?

​ Yes, crowns can be constructed with mesial or distal male rhein attachments then the chrome framework incorporating the nylon rhein cap will snap over the crowns and increase retention.

Rhein Attachment Distal of Crown
Rhein Attachment Distal of Crown

My patient’s Rhein attachment denture is not as retentive as it used to be. Is there anything you can do?

Yes, replacing the nylon caps solves this. We can either replace the nylon caps on the denture in the lab or send you out nylon caps for replacement chair side. It is recommended that these caps should be changed every 12 months.

Standard Retention Clear Rhein Cap
Standard Retention Clear Rhein Cap

What are the differences in the colour of the rhein caps?

The colour of the caps relate to how retentive the cap is.

Lab Cap | Extra Soft | Soft | Standard
Black Lab Cap | Yellow Extra Soft | Pink Soft | Clear Standard | Aqua Strong Retention

Can you laser weld a broken clasp?

​Yes, although sometimes it is best to laser weld on a new clasp.

Can you laser weld a gold clasp directly to a denture framework?

Laser Welded Addition of Clasp
Laser Welded Addition of Clasp

​

We can laser weld any clasp metal to chrome but only titanium to titanium.

My patient’s denture framework fractured completely in half. Can it be repaired?

​ Yes if we have a situ impression and can align the denture up again.

I’m not sure how strong laser welding is?

​

Laser Welded Crown
Laser Welded Crown

A laser weld is usually stronger than the material being welded so it is unlikely to break again in the same place.

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