The technical support department recommends the use of the Bond-In technique for maximum ease of use.
The Security Lock system is a uniquely designed lingual set screw system that can now be processed independently from the dental alloy; thus eliminating all variables involved in the burn-out, casting and devesting stages. Large, implant supported bridges for example, can now be fabricated and porcelanized without worrying about thread integrity or over-oxidation of pre-fabricated metal components. The Thread Sleeve and Locking Screw can be bonded into the bridge after all oven firing is done using the DTK Adhesive from Bredent.
Pic 1: Initial tooth set-up; Pic 2: A
silicone matrix taken of the set-up relates the working spaces on the
master model to wax the abutments; Pic 3: Six abutments are waxed
and pre-milled with a 2º taper.
Pic 4: Using a Diatit Multidrill
(#33000790), a 1.4 mm pilot hole for the Security Lock is pre-drilled in
plastic/wax; Pic 5, 6, 7: Pikuplast pattern resin (Yellow #54000217) is used to create the overcasting. The Auxiliary Modeling
Element (# 36001169) was used to create a receptacle that allows
bonding-in of the security lock assembly. Perforations were made into
the connector areas of the overcasting for retention.
Pic 8: The silicone matrix is applied over
the Pikuplast resin overcasting pattern to check space availability;
Pic 9: Mesh pattern is added for extra retention. The overcasting
pattern is sprued according to The Bredent Casting Technique Manual (#992961GB)
Pics 10, 11: A dense and accurate casting;
Pic 12: After sandblasting the framework, the light curing,
Tooth-Colored Opaquer UV (#54000105)
is used to mask out the grey metallic color.
Pic 13: The teeth set-up is transferred
onto the overcasting; Pic 14: The case is finished using
composite, however conventional denture acrylics may also be used;
Pic 15: A gingival-side view of the case. Pink colored composite was
used to add some interdental papilla for maximum aesthetics.
Pics 16: The Security Lock is bonded into
the pre-established receptacle using DTK Adhesive (#54001185); Pic 17:
The Security Lock locking screw is check for easy insert and removal.
*** A hands-on
course for this technique is highly recommended; call us at
1-877-328-3965 for pricing and availability ***
Once the first bridge section has been waxed up according to the
angle of insertion of the second section, wax up a custom primary
stud or adapt a prefabricated component (e.g. a Bredent custom
bridge sectioning attachment) to the bridge section and wax it into
place. After casting, trim the bridge section and mill the primary
Mark the location and angle of the threaded hole with a pen and
drill a purchase point with a center drill. Drill the hole with the
relevant Bredent Multidrill (1.0 Ø - Item #330 006 10; 1.4 Ø - Item
#330 007 90; 1.8 Ø - 330 008 00). Caution: Use plenty of
milling/drilling oil (Bredent Item #5510 000 08) when drilling. All
other oils, especially etheric oils, are unsuitable. The drills
listed above must not be used at speeds exceeding 5,000 r.p.m.
Screw the threaded rod into the threaded sleeve and reduce the
pin (non-threaded section of the rod) to the require length. If
necessary, the threaded rod and the threaded sleeve can be reduced
to suit the hexagonal socket. To do so, please remove the components
from the hole in the inner section. The threaded components can also
be reduced after the outer section has been fabricated. Once the
components have been reduced, insert them into the hole in the inner
Coat the threaded sleeve and rod with fully combustible
resin (e.g. Pi-Ku-Plast, Item #540 001 7-). Complete the
pattern with wax. After waxing up, unscrew the threaded
rod from the sleeve anti-clockwise. The outer section
can then be lifted off.
Screw in the retention rod to hold the threaded sleeve
in the correct position in the casting ring. Before
screwing the rod into the sleeve, coat it with a thin
layer of Colloidal Graphite (Item #540 007 06). This
prevents the rod from burning into the investment and
enables it to be removed easily after casting.
As the Security Lock System cast-on, threaded sleeves
are made of high gold-content alloy (melting range:
1350º - 1460º C), the casting temperature of the alloy
being cast onto them must not exceed 1350º C. Investing
and casting is carried is carried out using standard
techniques and in accordance to the investment material,
alloy and casting machine manufacturers' instructions.
After casting, devest and clean as usual. Do not remove
the retention rod until the castings have been
sandblasted. Caution: The retention rod can only be used
once as it will not function properly for a second
Note: The threaded sleeves can only be shortened at the
non-threaded end. If it is shortened at the other end,
no guarantee of faultless function can be given.
Size 1.0 = 2.3 mm.
Size 1.4 = 2.3 mm.
Size 1.8 = 2.3 mm.
This product information sheet is updated regularly to include
the latest information. We recommend that users always read the
product information sheet before using a new pack. This product
information sheet refers to the Security Lock System 1.0, 1.4, and
These screwdrivers are used for tightening Bredent screws. These
screwdrivers are used for:
" Screws in the Security-Lock-System - Item #s 430 072 90, 430 072
91, 430 072 92, 430 072 93, 430 072 94, and 430 072 95.
" Titanium Screws - Item #330 007 00
" Included in Tool Set - Item #330 006 00
" Included with the OC Bridge Sectioning Attachment - Item #430 073
The short screwdriver is used for tightening the screws
described in section 1 on the model and in the patient's mouth. When
used in the mouth, the screwdriver must be attached to the
operator's wrist with a chain to prevent aspiration/inhalation. The
torque must not exceed 20 Ncm. The knurled side of the handle on the
short screwdriver has an additional function: the square aperture
can be used for removing the retention screw (Security-Lock, OC
Bridge Sectioning Attachment, Screw Set) from the thread after
The latch screwdriver is used for tightening the screws
described in section 1 in the patient's mouth. When using the latch
screwdriver, it is advisable to use a torque controller set to 20
Ncm. A higher torque value may cause the latch screwdriver or screw
to shear off.