Academy of Laser Dentistry

J O U R N A L O F L A S E R D E N T I S T R Y | 2 011 V O L . 19 , N O . 3
304
R E S E A R C H A B S T R A C T S
L A S E R - M O D I F I E D T I TA N I U M I M P L A N T S F O R I M P R O V E D C E L L A D H E S I O N
Andreas Heinrich, Katrin Dengler, Timo Koerner,
Cornelia Haczek, Herbert Deppe, and Bernd Stritzker
Concerning dental implant systems, a main problem is
the adhesion of peri-implant mucosa in the cervical
region. The aim of the present study was to use a laser
for modifying titanium implants to promote mucosal
adhesion, which is indispensable as a biological barrier
against bacterial infection. By the use of a KrF excimer
laser, it was possible to induce a holey structure on the
polished area of the implant surface, which was
analysed by a scanning electron microscope. In addi-
Peri-implantitis is considered to be a multifactorial
process involving bacterial contamination of the
implant surface. A previous study demonstrated that a
combination of toluidine blue O (100 microgram/ml)
and irradiation with a diode soft laser with a wavelength
of 905 nm results in an elimination of
Porphyromonas gingivalis (P. gingivalis), Prevotella
intermedia (P. intermedia), and Actinobacillus actinomycetemcomitans
(A. actinomycetemcomitans) on
different implant surfaces (machined, plasma-flamesprayed,
etched, hydroxyapatite-coated). The aim of this
study was to examine the laser effect in vivo. In 15
patients with IMZ implants who showed clinical and
radiographic signs of peri-implantitis, toluidine blue
Universität Augsburg, Augsburg, Germany
Lasers Med Sci 2008;23(1):55-58
tion, the attachment of fibroblast cells to the created
structures was investigated with the aid of an environmental
scanning electron microscope. It turned out that
the cells preferentially attach to the holey structure.
Thereby, the cells form bridges inside, leading to a
complete covering of the hole. In this way, a more effective
biological barrier against bacteria can be created.
Copyright 2008 Springer nn
L E T H A L P H OTO S E N S I T I Z AT I O N F O R D E C O N TA M I N AT I O N O F I M P L A N T
S U R FA C E S I N T H E T R E AT M E N T O F P E R I - I M P L A N T I T I S
Orhun Dörtbudak, Robert Haas, Thomas Bernhart, Georg Mailath-Pokorny
University of Vienna, Vienna, Austria
Clin Oral Implants Res 2001;12(2):104-108
O was applied to the implant surface for 1 min and the
surface was then irradiated with a diode soft laser with
a wavelength of 690 nm for 60 s. Bacterial samples
were taken before and after application of the dye and
after lasing. The cultures were evaluated semiquantitatively
for A. actinomycetemcomitans, P. gingivalis, and
P. intermedia. It was found that the combined treatment
reduced the bacterial counts by 2 log steps on
average. The application of TBO and laser resulted in a
significant reduction (P < 0.0001) of the initial values
in all 3 groups of bacteria. Complete elimination of
bacteria was not achieved.
Copyright 2001 Blackwell Publishing and the European
Association for Osseointegration nn