Summary
Background
Facial wrinkles are caused by weakening of the sub-dermal collagen support layer.
Dermal fillers can be used to treat wrinkles, and this double-blind, randomised, single-centre
study compared four fillers: PRI 1, PRI 2 (both porcine collagen), Zyplast® (purified bovine collagen) and Perlane® (cross-linked hyaluronic acid gel).
Methods
79 females (aged 25–55 years) with wrinkles in the upper lip line border were randomised
to PRI 1 (19 patients), PRI 2 (19 patients), Perlane® (23 patients), Zyplast® (18 patients). Patients were assessed at 1 week and 1, 3, 6, 9 and 12 months using
2D images and by mathematically derived facial volume changes using 3D stereophotogrammetry.
Results
All treatments produced larger, less wrinkled, more prominent lips. PRI 1, PRI 2 and
Zyplast® showed similar lip volume gains, with Perlane® showing the greatest upper lip volume increase. All treatments were comparable for
rates of decrease in upper lip volume post-treatment, however, Perlane® maintained higher lip volume gains at each time point. Investigators indicated PRI
1 was significantly easier to deliver than Zyplast®. Patient satisfaction scores were similar, though there was a trend towards greater
dissatisfaction for PRI 1 and PRI 2 at month 9 (p=0.052). Treatment was well-tolerated, with ‘cold sore’ being the most common adverse
event.
Conclusions
Results showed that PRI 1 and PRI 2 were comparable to Perlane® and Zyplast® as dermal fillers. Further rigorous studies are required to establish the performance
of dermal fillers and patient acceptability. We propose the utilisation of stereophotogrammetry
for assessment of volume changes.
Keywords
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Article info
Publication history
Published online: November 05, 2008
Accepted:
June 9,
2008
Received:
September 5,
2007
Identification
Copyright
© 2009 British Association of Plastic, Reconstructive and Aesthetic Surgeons. Published by Elsevier Inc. All rights reserved.
