Presidential Greeting - American Society for Laser Medicine and ...

72 American Society for Laser Medicine and Surgery Abstracts
Study: Ten subjects, skin types I–IV, with facial and non-facial
photodamage received an average of two treatments (14- to 45-day
intervals) using 1,550 nm immediately followed by 1,927 nm
(Fraxel re:store 1 DUAL, Solta Medical, Inc.). Topical anesthetic
was applied 1 hour before treatment. Laser settings of 20–40 mJ/
pulse and coverage density of 14–26% were used for the 1,550 nm
wavelength, and 5–15 mJ/pulse and 30–40% for the 1,927 nm
wavelength. Subjects were evaluated for safety and efficacy at
each study visit.
Results: Moderate-marked improvement in photodamage and
pigmentation was observed for all subjects. Significant
improvement in fine and coarse wrinkling, lentigines, sallowness
and skin texture was observed during follow-up visits. Average
subject discomfort score was 3.3/10 (0–10 scale). Post-treatment
responses included mild-moderate transient erythema and
edema, with no adverse events reported. Patient satisfaction with
clinical outcome was high.
Conclusion: The clinical results of this study support the use of
combining 1,550 and 1,927 nm wavelengths for safe and effective
treatment of photodamaged skin on facial and off-face areas.
Fewer sessions than traditional nonablative fractional laser
resurfacing were necessary. This well-tolerated treatment option
addresses both superficial and underlying dermal effects
associated with photodamage, with limited or no additional
downtime for patients.
#243
SELF-ETCH ADHESIVES AND LASER TOOTH
PREPARATION, IS IT A REASONABLE
COMBINATION?
Ali Obeidi, Weiwei Wang, Jeema Dad,
Jacquie Duong, Petra Wilder-Smith
University of Texas Health Science Center, Houston, TX;
ATSU Arizona School of Dentistry & Oral Health, Mesa, AZ;
Beckman Laser Institute and Medical Clinic, University of
California, Irvine, CA
Background: The development of self-etch bonding systems and
on the other hand introduction of Erbium lasers to restorative
dentistry has allowed the practitioners to carry out minimal
invasive treatments, but studies have been reported lower bond
strength of the new self-etch systems. It was also the same for the
bond strength of laser prepared cavities. The purpose of this study
was to investigate the combination of these two technologies and
also the possibility to restore the bond strength.
Study: Two hundred human molars were used to test bond
strength of five self etch adhesives [Clearfil SE (CFSE), ClearfilS3
Bond (S3), Schotch Bond SE (SBSE), Easy Bond (EB) and
OptiBond All-in-One (OB)] to enamel and dentin surfaces after
application of four different preparation techniques: Bur, Laser
[Er,Cr:YSGG, 4.5 W, 60% air, 80% water (enamel) 3 W, 60% air,
70% water (dentin)], Laser þ Excavation (LExc) and
Laser þ Excavation þ Acid Etch (LExcAE). Acid Etch
(phosphoric acid 37%) has been applied for 20 (enamel) and 15
(dentin) seconds, then washed out with water. Adhesive procedure
were followed according to the manufacturer’s recommendations,
a composite cylinder (Z 100, 3 M ESPE) was placed on the treated
surface using Ultradent gig (d ¼ 2.3 mm), light cured for
40 seconds and stored at 378C at 100% humidity for 24 hours prior
to shear bond strength (SBS) testing (0.5 mm/min) and data were
analyzed (ANOVA, Tukey’s, P < 0.05).
Results: Statistical analysis showed significant improvement
(P < 0.05) to the bond strength of the laser prepared samples in
favor of LExcAE in most of the bonding—substrate groups. But
there were no significant differences between techniques in
CFSE-Enamel groups, S3-Dentin groups and EB-Dentin groups.
Conclusion: Within the limits, it can be concluded that
excavation and subsequent conventional etching may
significantly increase the bond strength of composite resin to
enamel and dentin prepared by laser when using a 6th or 7th
generation self-etch bonding system.
#244
MULTI-WAVELENGTH LASER TREATMENT FOR
CUTANEOUS VASCULAR LESIONS IN ASIANS
Takafumi Ohshiro, Toshio Ohshiro, Katsumi Sasaki,
Yuki Taniguchi
Ohshiro Clinic, Tokyo, Japan
Background: Pulsed dye laser (PDL) is the golden standard
method for the treatment of port wine stains (PWS). Although the
clinical results have been remarkably improved using the
revolutionary PDL system, it is difficult to treat the lager/smaller
diameter micro-vessels and deeply situated vessels in dermis.
Since 2006 we have applied the dual wavelength laser system
(Cynergy Multiplex, Cynosure, USA) for various vascular lesions.
Cynergy Multiplex can emit the two wavelengths (595 and
1,064 nm/PDL and Nd:YAG) separately by millisecond time delay.
The purpose of the study is whether this dual wavelength laser
system is effective for the cutaneous vascular lesions in Asians.
Study: We have applied the 595/1,064 nm wavelength laser
system for the various cutaneous vascular lesions such as PWS,
venous malformations, nodular type angiomas in Asians.
Results: Longer pulse PDL and low Nd:YAG fluence could allow
the good clearance. Our 5 years’ experience has revealed that this
sequential emission could fade the refractory PWS, and could
downsize the venous malformations and nodular angiomas with
no permanent adverse effects.
Conclusion: In Asians the sequential emission could be a
treatment option for cutaneous vascular lesions, which consist of
deeply situated micro-vessels or larger diameter micro-vessels.
#245
PIGMENTATION SEQUELAE OF CUTANEOUS
AIDS-RELATED KAPOSI’S SARCOMA
SUCCESSFULLY TREATED BY Q-SWITCHED
ALEXANDRITE AND ND:YAG 532 NM LASERS
Thierry Passeron, Rosalind Hughes,
Lacour Jean-Philippe
University Hospital of Nice, Nice, France
Background: Despite the improvement of the treatment for
AIDS related Kaposi sarcoma (AIDS-KS), the lesions can lead to
unsightly pigmentary sequelae, suggestive the underlying
diagnosis. Such pigmentations are due to hemosiderosis. We
report a case successfully treated with Q-switched laser.
Study: A 53-year-old male, presented with AIDS-KS pigmentary
sequelae. He had a complete response to the highly active antiretroviral
therapy (HAART) and systemic vincristin
chemotherapy. However, the KS lesions left disfiguring, large
purple to brown patches on the shins, ankles and calves that
remained unchanged one year after the cessation of
chemotherapy. A test session was done on a large plaque on the
right shin using several wavelengths: 532 nm Q-switched Nd:YAG
laser (6 J/cm 2 ), 1,064 nm Nd:YAG laser (6 J/cm 2 ), 755 nm