With a combination of experience and young innovative technicians
JJ Ceramics can offer you the best of traditional casting and pressing techniques
as well as the latest in CAD/CAM design and milling
With all full ceramics restorations care must be taken to record the underlying stump as this can affect the final shade once the crown is cemented. Dark stump shades can be blocked out using a high opacity coping or block-out sintering liquid (in the casde of zirconia), which reduces the risk of incorrect final shades.
Zirconia has been at the forefront of development in dental restorations in recent times. There are now multiple options of strength and translucency available to suit different case requirements. As with most dental resorative materials the more aesthetic and translucent materials have consideralbly less strength. New innovative 3D zirconia materials now exhibit a multilayer of strength. Zirconia can be etched and bonded using a firing of hot-bond material. Using the latest CAD/CAM technology JJ Ceramics can assure accuracy of fit and ease of insertion for all our zirconia restorations.
Used mainly for posterior crowns where strength is a prerequisite. These crowns very rarely fracture due to their high compressive strength
Available in a higher strength (suitable for use in all cases from single units to full arch bridges) as well as higher translucency (suitable for single unit and 3 unit bridges where aesthetics is important)
Zirconia can be layered with e-Max ceramic to achieve natural effects and combination shades. This is also useful for matching to the Vita 3D shade guide. This is our crown of choice for a combination of strength and high aesthetics
e-Max is well known as the benchmark for lithium disilicate restorations. WIth a compressive strength of up to 500 MPa this material is suitable for anterior and posterior cases. The material can be manufactured in 5 different opacities (HO,MO, LT, MT and HT) and all 16 vita classical shades. There are also multilayered ingots in selected shades. e-Max is suitable for use in select 3 unit bridge cases and is limited by pontic width. At JJ Ceramics we have not found this material suitable for use with cantilever or maryland bridges. e-Max can be pressed (traditional) or milled with precision using CAD/CAM technology
PFM crowns have been used traditionally for decades and offer strength and aesthetics. They are suitable for single units and up to full arch bridges. They have lost their appeal due to the comparatively longer labour time and skill involved in production. Aesthetics is challenging in cases where limited space is available for ceramics latering and over time a black shadow can develop around the margin. Changes in the occlusion of patients over time can also cause fracturing and debonding of the ceramics from the metal, making them difficult to repair.
The least aesthetic, but strongest of dental restorations; full metal crowns are manufactured using traditional casting techniques as well as CAD/CAM based applications. At JJ Ceramics we offer a variety of metals ranging from high quality gold, non-precious gold, palladium silver and non-precious silver. Cost is relative to the weight and type of metal cast
These are a two piece option mainly used where a screw retained angled abutment is not suitable or available for the implant system being used. The abutments can be milled in zirconia, cast in metal or can be stock abutments purchased from the manufacturer and trimmed up to suit the case. The abutment is placed and then the crown is cemented in the mouth.
These dentures are made using a fixed bar with retention components incorporated into the denture. These systems can include preci-clips, dolder and hader clips as well as a wide variety of ball attachments and retentive clips welded to the bar. We will assess what system is best for each case. The denture can also incorporate a metal strengthener or a milled metal interface for longevity. Advantages of this denture is ease of cleaning around the implants.
These dentures are processed around a fixed bar designed to support the denture accurately. This is our most cost effective fixed implant denture restoration. We use titanium for our bars.
These are our most aesthetic implant restorations and include:
– Full zirconia bridges
Highly aesthetic, however the one disadvantage is that if they fracture a whole new bridge must be fabricated. Even the slightest of discrepancies in the implant impression can cause a failure in time.
– Milled e-Max or Zirconia crowns on titanium/ co-cr bars
This is the system of choice for our Laboratory. Individual crowns are cemented onto a metal frame. The frame is one piece and incorporates the implant interfaces. These restorations are strong and light. Individual crowns can be replaced without removing the bridge. Just a clean up of the prep and a new impression can be taken if the original file is no longer available. Gum can be accurately matched with SR Nexco material.
Full PFM bridges on milled or cast metal superstructures
This is the traditional method used to make full implant bridges. If the ceramic fractures it is extremely difficult to repair.
Custom shade matching is extremely challenging as a tooth shade can look different in changing ambient light. Comparing teeth by eye to a shade guide is at best fraught with difficulties. Reflections, cracks and staining can create illusions of color that the eye cannot discern. Once the color is ascertained the technician then needs to apply all his skill and knowledge of materials to create a match sometimes with only a layer of .5mm for veneering ceramic. This is not easy and dentists and patients are becoming increasingly demanding to achieve perfect results.
To this end we now use the latest technology to get as close as possible to the final shade. We have used a Spectroshade mini that gives an accurate colour rendering of the tooth in minute detail in the past. Unfortunately, there was still no way to compare the final crown with the data from the machine.
At JJ Ceramics we have invested in the e-Lab emulation system from Sascha Hein incorporate the system into our shade matching process. The system analyses the colour data from a photograph using a cross polarizing lens that removes reflection from the image to give a true result. The software then provides a mix of ceramic matched to the underlying ceramic structure you are layering onto. At any stage you can photograph your crown and digitally place it in the original photograph to compare your result and measure the accuracy.
As a team we believe this is an exciting progression in the service that we offer. Dentists can also purchase the filters and color cards and learn to take images that we can use in the Lab.