Fixture MicroThread - Astra Tech

Taking technology
to the top
Fixture MicroThread

Now Introdu
Follow the thread
– for top performance!
The Astra Tech Fixture ST was the first dental
implant to employ a landmark innovation in
implant technology – the patented microthread
retention elements at the fixture neck. Clinical
and preclinical documentation on the microthreads
has proved it to be uniquely successful
in maintaining the marginal bone. 1
This success is the rationale for introducing
microthreads on all Astra Tech implants under
the brand name Fixture MicroThread – a
concept that will continue to revolutionize the
design and use of dental implants.
2

A major innovation backed by extensive research,
experience, and documentation...
cing Fixture MicroThread
MicroThread – success defined!
Fixture MicroThread is a self-tapping implant. Its This
key features are a fine, shallow microthread on
the cervical part of the fixture, plus a coarser
thread on the lower portion. The whole fixture
has the unique and well-documented surface
1-5, 7, 9-18
texture – TiOblast.
combination of macro- and micro-retention
elements provides a superior bone-to-implant
interlock, with an increased capacity to withstand
functional load and maintain the marginal bone.
Fixture MicroThread – One line
of fixtures for all requirements
3.5 4.0 ST 4.5 ST 5.0 ST
Fixture MicroThread is an implant for all clinical situations –
for single-tooth replacement, for the partially or totally
edentulous jaw, for narrow and wide spaces, and for both
the mandible and the maxilla.
Three of the MicroThread fixtures – 4.0 ST, 4.5 ST, and
5.0 ST – have an internal ‘double hex’ design, providing
indexing of the abutments.
3

Stimulate bone formation!
Fixture MicroThread – designed to carry load
Like all bone in the human body, the jawbone needs
stimulation to regenerate. Thus, a dental implant
should exert a favorable level of mechanical stress
on the surrounding bone when loaded.
Astra Tech has conducted in-depth studies
of the effect of various thread profiles on the
surrounding bone tissue. This research resulted in
the development of the optimized MicroThread
concept, which plays an important role in tissue
13, 14
response to the implant.
Documented experimental and clinical research
clearly shows that the presence of the MicroThread
retention elements at the fixture neck results in
exceptionally uniform stress distribution and low
stress peaks.
This is the fundamental reason why MicroThread
preserves the marginal bone and actually stimulates
1, 15
bone regeneration.
Fixture MicroThread
– the only implant design that
• is designed to carry load.
• increases the functional load bearing
capacity at least threefold.
• optimizes the immediate loading
protocol.
4

FEA (Finite Element Analysis) graphics
showing optimized and evenly distributed
stress at the implant neck – induced by the
MicroThread retention elements.
5

Eliminate “black triangles”
Do not accept bone loss
A high and maintained marginal bone level not
only ensures secure anchoring of the implant, but
also promotes and supports healthy soft tissues.
Fixture MicroThread therefore preserves the
integrity of both hard and soft tissues, which is
fundamental for long-lasting esthetics.
With Fixture MicroThread you have no need
to compromise.
For you, the dentist, a satisfied patient is
the primary goal of dental implant treatment.
To be satisfied, the patient demands a functional
result and long-lasting esthetics without “black
triangles”.
The key to optimal esthetics and functional outcome
is maintenance of the marginal bone.
Healthy bone and
soft tissue means no
“black triangles”,
giving optimal
esthetics.
6

Baseline x-ray
showing Fixture
MicroThread in
place.
X-ray at 5 years
showing preservation
of high
levels of marginal
bone.
Baseline x-ray
showing Fixture
MicroThread
installed in a
periodontically
compromised
situation.
X-ray 5 years later
showing bone
regeneration.
CLINICAL PERFORMANCE
– A 5-year prospective study
0.5
Marginal bone (mm)
The thread design
provides excellent
bone-to-implant
contact.
0.0
– 0.5
Baseline
5 years
Palmer et al., 2000
Long-term data confirm
the integrity of the
bone and thereby the
maintained soft tissue
appearance. 1
7

The New MicroThread Package
Fixture MicroThread is supplied premounted
in an innovative sterile package design
that facilitates easy handling.
Lift out the implant, manually
or with the Contra Angle, and
place it directly into the
prepared installation site!
8

The various fixture sizes
are now color-coded, for
ease of use.
Fixture MicroThread Length mm:
3.5 mm
4.0 mm ST
4.5 mm ST
5.0 mm ST
8 9 11 13 15 17 19
9

Advantage Astra Tech!
MicroThread, view from electron microscope.
TiOblast, as seen in the electron microscope.
Conical Seal Design.
MicroThread
The unique design for optimized load transfer and preservation
of the marginal bone.
This provides increased durability and stability of the
implant, leading to predictable esthetic and functional
1, 10-12, 16
results.
TiOblast
The fixture has a well-defined rough surface, TiOblast,
with proven biomechanical benefits for bone formation
and implant retention. The excellent properties of the
TiOblast surface have been verified in animal and human
1-5, 7, 9, 15-17
histology studies and in long-term clinical trials.
Conical Seal Design
The conical relation between fixture and abutment is the
6, 8, 19-21
backbone of the Astra Tech Dental Implant System.
It provides strength and a tight seal between the two
components, minimizing the risk of micro-leakage and
component loosening. 20-21 It also distributes loads over a
larger surface area, reducing stress peaks. The self-guiding
nature of the Conical Seal Design simplifies handling and
ensures easy and precise seating of the components.
Our Mission
The Astra Tech Dental Implant System is based on
years of scientific research and clinical documentation.
The result is a unique system with a perfect balance
of Simplicity, Reliability, and Esthetics proven in
long-term clinical studies. Astra Tech is committed to
forming long-term working relationships with dental
professionals, offering products and services that
improve the quality of life.
10

Comparison with other dental implants
Compared to flat-top dental implants
without microthreads, Astra Tech
Dental Implants offer you:
• higher marginal bone levels.
• increased bone stability and quality.
• healthier soft tissues with no black
triangles.
• no microleakage between
components.
Bone level
Astra Tech
implants
Bone level
other
implants
1. Palmer, R. M. et al.
A 5-Year Prospective Study of Astra Single Tooth
Implant. Clin Oral Impl Res 2000;11:179-182
2. Gotfredsen, K. et al.
Histomorphometric and Removal Torque Analysis for
TiO 2 -Blasted Titanium Implants.
Clin Oral Impl Res 1992;3:77-84
3. Ericsson, I. et al.
A Histomorphometric Evaluation of Bone-to-Implant
Contact on Machine-Prepared and Roughened
Titanium Dental Implants.
Clin Oral Impl Res 1994;5:202-206
4. Abrahamsson, I. et al.
The Peri-Implant Hard and Soft Tissues at Different
Implant Systems. Clin Oral Impl Res 1996;7:212-219
5. Ivanoff, C-J. et al.
Histologic Evaluation of the Bone Integration of TiO 2
Blasted and Turned Titanium Microimplants in
Humans. Clin Oral Impl Res 2001;12:128-134
6. Makkonen, T. A. et al.
A 5-Year Prospective Clinical Study of Astra Tech
Dental Implants Supporting Fixed Bridges or
Overdentures in the Edentulous Mandible.
Clin Oral Impl Res 1997;8:469–475
7. Åstrand, P. et al.
Astra Tech and Brånemark System Implants: A
Prospective 5-Year Comparative Study. Results after
One Year. Clin Impl Dent Rel Res 1999;1:1:17-26
8. Gotfredsen, K. et al.
Implant-Supported Mandibular Overdentures Retained
with Ball or Bar Attachments: A Randomized
Prospective 5-Year Study.
Int J Prosthodont 2000;13:125-130
9. van Steenberghe, D. et al.
A Prospective Split-Mouth Comparative Study of Two
Screw-shaped Self-Tapping Pure Titanium Implant
Systems. Clin Oral Impl Res 2000;11:202-209
10. Norton, M.
The Astra Tech Single-Tooth Implant System: A Report
on 27 Consecutively Placed and Restored Implants.
Int J Periodont Rest Dent 1997;17:575-583
11. Norton, M.
Marginal Bone Levels at Single Tooth Implants with a
Conical Fixture Design. The Influence of Surface
Macro- and Microstructure.
Clin Oral Impl Res 1998;9:91-99
12. Puchades-Roman, L. et al.
A Clinical, Radiographic, and Microbiologic
Comparison of Astra Tech and Brånemark Single Tooth
Implants. Clin Impl Dent Rel Res 2000;2:2:78-84
13. Hansson, S. et al.
On the Role of the Thread Profile for Bone Implants
with Special Emphasis on Dental Implants. In Towards
an Optimized Dental Implant and Implant Bridge
Design: A Biomechanical Approach. Thesis Hansson S,
Chalmers University of Technology, Göteborg, 1997
14. Hansson, S.
The Implant Neck: Smooth or Provided with Retention
Elements. Clin Oral Implant Res 1999;10:394-405
15. Rasmusson, L. et al.
Effects of Implant Design and Surface on Bone
Regeneration and Implant Stability: An Experimental
Study in the Dog Mandible.
Clin Impl Dent Rel Res 2001;3:1:2-8
16. Cooper, L. et al.
A Multicenter 12-Month Evaluation of Single-Tooth
Implants Restored 3 Weeks After 1-Stage Surgery.
Int J Oral Maxillofac Implants 2001;16:182-192
17. Gotfredsen, K. et al.
A Prospective 5-Year Study of Fixed Partial Prostheses
Supported by Implants with Machined and TiO 2 -
Blasted Surface. J Prosthodont 2001;10:1:2-7
18. Hansson, S
Surface Roughness Parameters as Predictors of
Anchorage Strength in Bone: A Critical Analysis.
J Biomechanics 2000;33:1297-1303
19. Hansson, S
Implant-Abutment Interface: Biomechanical Study of
Flat Top versus Conical.
Clin Impl Dent Rel Res 2000;2:1:33-41
20. Norton, M
An in vitro Evaluation of the Strength of an Internal
Conical Interface Compared to a Butt Joint Interface in
Implant Design. Clin Oral Impl Res 1997;8:290-298
21. Norton, M
In vitro Evaluation of the Strength of the Conical
Implant-to-Abutment Joint in Two Commercially
Available Systems.
J Prosthet Dent 2000;83:567-571
11

75253-USX-0208
Fixture MicroThread
• Increased bone quality and stability
• Healthier and stable soft tissues
• Higher success rate
• Improved esthetic results
• More clinical options
Denmark
Astra Tech A/S, Husby Allé 19, DK-2630 Taastrup.
Tel: +45 43 71 33 77. Fax: +45 43 71 78 65.
www.astratech.dk
Finland
Astra Tech Oy, PL 96, FIN-02231 Espoo.
Tel: +358 9 8676 1626. Fax: +358 9 8044 128.
www.astratech.fi
France
Société de Matériel Médical, Astra Tech France,
Groupe Pharmaceutique AstraZeneca,
7, rue E & A Peugeot, FR-92500 Rueil-Malmaison.
Tel: +33 1 41 39 02 40. Fax: +33 1 41 39 02 44.
www.astratech.fr
Germany
Astra Tech GmbH, An der kleinen Seite 8, DE-65604 Elz.
Tel: +49 6431 9869 0. Fax: +49 6431 9869 500.
www.astratech.de
Italy
Astra Tech S.p.A
Via M. Luther King n. 38/2, IT-40132 Bologna.
Tel: +39 051 641 6511. Fax: +39 051 641 7742.
www.astratech.it
The Netherlands
Astra Tech BV, Signaalrood 55, NL-2718 SG Zoetermeer.
Tel: +31 79 360 1950. Fax: +31 79 362 3748.
www.astratech.nl
Norway
Astra Tech AS, Postboks 160, NO-1471 Lørenskog.
Tel: +47 67 92 05 50. Fax: +47 67 92 05 60.
www.astratech.no
Spain
Astra Tech S.A.,
Calle Ciencias nº 73 derecha. Nave 9, Polígono
Industrial Pedrosa, ES-08908 L´Hospitalet de Llobregat.
Tel. Servicio al cliente: +34.902.101.558.
Tel: +34.932.643.560. Fax: +34.933.363.231.
www.es.astratech.com
Sweden
Astra Tech AB, P.O. Box 14, SE-431 21 Mölndal.
Tel: +46 31 776 30 00. Fax: +46 31 776 30 10.
www.astratech.se
United Kingdom
Astra Tech Ltd., Brunel Way, Stonehouse, Glos GL10 3SX.
Tel: +44 1453 791763. Fax: +44 1453 791001.
www.astratechuk.com
USA
Astra Tech Inc.
430 Bedford Street, Suite 100, Lexington, MA 02420.
Tel: +1 781 861 7707. Fax: +1 781 861 7787.
www.astratechusa.com
Japan
Astra Tech Division, AstraZeneca K.K.
Tokyo Regional Office
Koraku Mori Bldg. 11F, 1-4-14, Koraku
Bunkyo-ku, Tokyo 112-0004.
Tel: +81 3 5840 1113. Fax: +81 3 5840 1160.
Other Markets
Astra Tech AB, Export Department,
P.O. Box 14, SE-431 21 Mölndal, Sweden.
Tel: +46 31 776 30 00. Fax: +46 31 776 30 23.
www.astratech.com
/Printed in Sweden by Typografia Olsén
Astra Tech AB, P.O. Box 14, SE-431 21 Mölndal, Sweden. Tel: +46 31 776 30 00. Fax: +46 31 776 30 10. www.astratech.com