As patients become aware of the advances within the dental field, technology moves at a greater pace allowing us to meet their needs now and into the future. From all Ceramic Crowns to Biogold Bridges using materials without compromise, we can provide both you and your patient with restorations unmatched in aesthetic beauty and strength.
The Crown and Bridge department at McDowell + Service consists of an experienced team of registered Dental Technicians, covering all aspects of crown and bridgework. From simple monolithic crown cases to complex, multi discipline implant prostheses. All work is carried out-in house including the manufacture of our own CAD/CAM products with the aid of our on-site milling facility.
GC Initial can create metal-ceramic restorations all the way to full-ceramic. This product consists of six ceramics in one integrated product line with one colour system. No longer does the ceramist have to spend valuable time learning to use a myriad of different ceramics from an array of manufacturers to create the variety of restorations which may be needed to complete a case. Each GC Initial ceramic is adapted to meet the needs of its particular fabrication process and framework, such as its coefficient of thermal expansion (or CTE). Stress cracks and fractures are therefore avoided, which assures strong bonding, adhesion and retention.
The Initial ceramic system allows our ceramists to use the identical processing method for all components using a single shade system. You don’t have to re-adjust to other unaccustomed layering techniques or layering systems. GC Initial gives us more essential time to be creative. It doesn’t matter if you are working with full ceramic, metal-based, titanium or zirconium oxide frameworks.
To extend the unparalleled shading system of GC Initial, GC have introduced Initial Bleach Shades with a unique colour set that allows for matching even the lightest tooth shades. They are available as separate sets, each containing different components. When adding them together, our ceramists can increasingly create aesthetic restorations.
ArtiZan Zirconia has unparalled flexural strength. It is an all-ceramic alternative designed specifically to meet posterior high load demands. ArtiZan Zirconia is a Monolithic, solid medical grade Zirconia for crowns, bridges or inlays without the porcelain overlay. They are hard sintered and virtually unbreakable with excellent long-term durability ideal for bruxers and grinders.
High Strength monolithic zirconia. Your go to choice for posterior single crowns. Also ideal for single anteriors (requiring a little more opacity) as well as multi unit bridges.
High Translucent monolithic zirconia for your more aesthetic cases. Ideal for anterior crowns, small span bridges and veneers.
Graded monolithic zirconia that combines, high strength and high aesthetics, used for the majority of our monolithic zirconia implant cases. Also ideal for anterior single crowns, veneers and bridges.
Layered Porcelain (feldspathic) fused to a high strength zirconia framework to provide a highly aesthetic restoration. Used for all indications. Also known as PFZ or Porcelain fused to zirconia.
Utilising the aesthetic ceramic of GC Initial porcelain in conjunction with palladium - silver alloy, this precious restoration provides your patient with a strong and versatile restoration.
Constructed in high strength feldspathic porcelain. They can be used for the smallest inlay preparation through to full crown restorations. Where the main consideration is the preservation of healthy tooth structure or aesthetics, this technique is ideal.
Maximum comfort with aesthetics, we offer a fixed solution for maximum comfort and high aesthetics. With McDowell + Service you receive the precision needed for the success and longevity of your restoration. We offer screw-retained implant bridges as well as implant bars for fixed prostheses.
Ivoclar Vivadent patented glass ceramic, lithium disilicate material is truly a revolution for the dental industry. With optimised translucency, opalescence, durability and strength for a wide range of all ceramic situations. IPS e.Max was designed to replicate natural tooth structure for beauty and undetectable restorations.
GC Initial porcelain bonded to 80% high yellow gold content alloy provides a restoration with all the advantages of a regular PFM but without the grey margins, low value or bio-compatibility issues.
Titanium’s resilience, biological and chemical inertness and low weight makes it ideal for all dental restorations, from porcelain bonded to titanium crowns and bridges, removable partial dentures to implant bars and abutments.
Shade taking can often be a complex, time consuming and challenging process for many dental clinicians, especially with today’s patients’ greater awareness of dental treatments and high demands for beautiful aesthetics.
At McDowell and Service Dental Laboratory we offer a comprehensive shading taking service for such patients.
When visiting the lab for shade taking, patients are greeted in our welcoming reception area and taken through to our purpose built shade consultation room.
Shade analysis is done with the aid of the MHT Spectra Shade shade taking device, the Optilume Trueshade and Smileline light-colour correcting lamps, in conjunction with the Vita Classical and 3D shade guides, as well as GC Initial, Noritake and e.Ceram shade tabs.
When referring a patient for a shade consultation at the laboratory, please contact our reception to arrange an appointment time.
We have a surgery area where patients can been seen by our senior technicians.
Personalised tooth positioning with resulting improved lip support are essential for life-like denture appearance and this can be achieved when the technician sees the patient.
EVOLUTION-Z LAYERED ZIRCONIA RESTORATIONS
Evolution-Z Layered Zirconia restorations, including crowns, bridges, veneers, inlays and onlays, have been developed with aesthetics, reliability and biocompatibility in mind.
Zirconia restorations are metal-free and highly translucent, giving a more natural appearance than metal bonded to porcelain restorations, which can produce a dark line at the gumline.
Because Evolution-Z restorations are made from zirconia, a highly biocompatible material which has been used in medical treatments for many years; they can be placed next to tissue without any gum reaction or irritation.
Evolution-Z Layered Zirconia restorations are amongst the strongest and most durable in dentistry, with a flexural strength of over 1200 MPa. These restorations are designed and milled using modern CAD/CAM technology, then skilfully hand finished by Terec’s dental technicians.
Unrivalled in natural beauty and fit.
ARTIZAN MONOLITHIC ZIRCONIA RESTORATIONS
Artizan Monolithic Zirconia Restorations, including crowns, bridges, inlays and onlays, have been designed specifically to meet posterior high load demands.
Strong and aesthetic, these restorations are ideal for bruxers and grinders that still want an aesthetic posterior restoration and situations where there isn’t enough occlusal preparation space for porcelain coverage. Artizan Monolithic Zirconia restorations are made from a solid block of monolithic medical grade zirconia. They require no porcelain overlay and are hard sintered to reach a flexural strength of up to 1100 MPa, making them virtually impossible to break.
Artizan Monolithic Zirconia restorations are perfect for tight, minimal clearance situations. Because they require no porcelain layer, they fit an occlusal reduction as small as 0.7mm, which is far less than standard PFM or layered Zirconia/porcelain. Every restoration is designed with CAD/CAM technology, so they can be designed from your own digital impression files as well as traditional impressions and models. Advanced manufacturing technology means they are milled for virtually perfect contacts, fit and easy seating.
Monolithic Zirconia has high values of translucency and, with no metal substructure; restorations are far more aesthetic in appearance than metal occlusion or full-cast crowns. Once milled, the restoration is glazed to a smooth, plaque resistant surface. They are also biocompatible and offer excellent long-term durability.
Strong and aesthetic, eliminates unsightly metal occlusals
Porcelain Veneer has become the cosmetic solution of choice.
This simple technique for replacing natural enamel allows the restoration of anterior teeth without involving the removal of large amounts of sound tooth substance. Veneers have been successfully used to correct the following situations:
• Restoring worn and aged appearance
• Discoloured teeth, tetracycline stains – Hypoplasia
• Chipped teeth
• Peg laterals
• MIsaligned teeth
• Partial erupted teeth
• Median diastema and space closure
• Covering eroded palatal enamel
• In most cases no anaesthetic required
• Minimal preparation, therefore preserving irreplaceably sound tooth structure
• Gingival integrity. The margin of the preparation is supra-gingival ensuring excellent gingival response and tolerance
• High level of oral hygiene
• No temporisation
• Extreme strength, translucence and biocompatibility.
Zirconia custom abutments offer the best aesthetic solution for cement and screw retained implant prosthetics and are strong enough to be used in all positions in the mouth.
Zirconia abutments work on most major implant platforms, giving you the freedom to choose the best solution for your patient.
Using our unique virtual abutment design software, we design individual zirconia abutments within the final tooth shape. The result is an abutment with outstanding function and aesthetics, and the restorative procedure is simple with reduced chair time. It will also eliminate the need for inventory of stock abutments and have a fixed cost custom abutment since no precious metals are used.
The CAD construction of Zirconia abutments allows greater accuracy when designing emergence angles and paths of insertion. The highly polished zirconia collar provides better acceptance to the soft tissues and produces an exceptional aesthetic abutment for single and multiple cases.
We provide fully customised Evolution-Z Zirconia abutments complete with screw and finished zirconia crown.
The best aesthetic cement and screw retained implant prosthetic restoration.
Our ArtiZan Zi crowns are made from isostatically pressed zirconia and once fully sintered, have a flexural strength of approximately 1350-1400 MPa. There is no risk of chipping as Zirconia crowns are not overlaid with veneering ceramic.
ArtiZan Zi crowns are ideally suited for posterior segments as an aesthetic alternative to unsightly metal occlusals. They are available in the full 16 Vita shade range. However, as the raw materials and manufacturing processes are improving constantly, it may be possible to place ArtiZan Zi crowns in the anterior region. (Please contact a technician for further information or see updates on this website).
Yes, from simple 2-unit cantilevers to multiple unit bridges are available in ArtiZan Zi. Crowns, inlays, onlays and implant restorations are also available.
To remove a pure Zirconia crown (and also lithium disilicate) can be difficult. However, there may be some methods that can make their removal a little easier.
1. Use zinc phosphate cement. Bonding techniques are not essential for zirconia or lithium disilicate crowns placed over adequately retentive tooth preparations.
2. Low cost, fine-grain diamond burs used at high speed with a very delicate sawing movement along with plenty of irrigation, is one of the more ideal ways to remove pure Zirconia and lithium disilicate crowns.
One advantage of this type of restoration is that the preparation can be slightly more conservative than other all-ceramic or even PFM restorations, with a preparation design similar to that of a full cast metal crown. Margin design should be 0.3-0.5mm chamfer. Avoid a ‘J’ like margin. Functional cusps should be reduced 1.0-1.5mm. Axial walls should taper 6-8 degrees achieving a depth of 1.0mm. Occlusal reduction 1.0-1.5mm on the central groove. AND avoid all sharp line angles as you would with any type of all ceramic tooth preparation.
Evolution-Z Zirconia or PFZ is a metal free and highly translucent restoration, resulting in a more natural appearance than a PFM. Because Evolution-Z Zirconia restorations are made from Zirconia and overlaid with GC Initial Porcelain, both highly compatible materials which have been used in dental treatments for many years; thus can be placed next to tissue without any gum reaction.
From simple cantilevers to full arch multi-unit bridges can be achieved using Evolution-Z Zirconia. However, a maximum pontic span in the anterior segment of four pontics is recommended.
It is recommended that a Maryland Bridge be constructed as a PFM because it is strong, proven and bondable. However, the problem is a PFM Maryland Bridge is often unaesthetic due the possible ‘shine through’ of the retaining wings. A porcelain fused to zirconia Maryland Bridge is possible and may require a little more tooth preparation than what is usual for a Maryland retainer but zirconia does not etch and there is a history of Zirconia Maryland Bridges de bonding.
For the latest information, please contact a technician.
Our special colour shading system and pre-shaded zirconia blanks combined with careful control of the processing operations guarantees the high quality and translucent splendour of Evolution-Z Zirconia restorations.
Yes, the Zirconia blanks used have varying degrees of opacity through to translucency, depending on the situation.
All Zirconia framework are manufactured by CAD/CAM systems and as we use the industry Gold standard, 3shape software for design, various types of precision attachments are available with every software update. Therefore, split bridges, combination cases with extra coronal attachments, telescopic copings and much much more will be available very soon
Feldspathic ceramic is widely used for veneer restorations as well as resin bonded crowns and can be weak in thin sections until bonded into position and therefore, correct preparation technique is essential for a successful restoration.
Please view the preparation guide when preparing for resin bonded restorations. Please note however, that sharp line angle must be avoided to reduce the risk of stress fractures in the ceramic. For veneers, it is generally considered for the bulk of the labial preparation should be kept within the enamel, at the same time maintaining the natural curvature of the tooth surface, with 0.75mm being the optimum amount of enamel to be removed. Mesial-distal preparation should be carried through to but without breaking adjacent contacts. There are varying thoughts with regard to incisal preparation, from the very conservative window approach through one for which the margin is on the incisal edge itself to the incisal overlap design with a finish line consisting of a butt margin or chamfer finish. Studies have shown that veneer restorations with an incisal overlap design, proved to be more successful than those without incisal coverage. Chamfered finish lines are preferred cervically. It is acceptable to leave gingival margins supragingivally in many cases where thin veneers are to be used and the existing tooth colour can be allowed to show through and determine the shade of the ceramic. Where tooth discolouration is to be masked out, the margin will almost certainly have to be placed out of sight. This may also be applicable for interproximal finish lines.
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