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Page 6 of 9                                                  Lee et al. Plast Aesthet Res 2018;5:43  I  http://dx.doi.org/10.20517/2347-9264.2018.39

               Table 2. Summary of hyaluronic acid dermal fillers currently commercially available in the United States. All except for
               Belotero Balance contain lidocaine
               Product   ®                   Site           HA concentration (mg/mL)  Duration (approximate months)
               Belotero Balance      Superficial - mid-dermis     22.5                     6
               Restylane-L           Superficial - mid-dermis     20                       6
               Restylane Silk        Superficial - sub-mucosal    20                       6
               Restylane Lyft        Medium - deep                20                       9
               Restylane Refyne      Medium - deep                20                       12
               Restylane Defyne      Medium - deep                20                       12
               Juvederm Ultra XC     Superficial - medium         24                       12
               Juvederm Volbella     Superficial - medium         15                       12-18
               Juvederm Vollure      Medium - deep                17.5                     12-18
               Juvederm Voluma XC    Medium - deep                20                       12-18
               Juvederm Ultra Plus XC  Medium - deep              24                       18
               HA: hyaluronic acid



                                      A                      B




















                  Figure 4. Volume restoration with dermal fillers. Common periocular treatment areas include the temple (A) and tear trough (B)

               taken. The authors’ choice of filler for this area is a hyaluronic acid with low water affinity, as chronic fluid
               collection can be a problem leading to the need for surgical excision. We most commonly use Restylane®, but
               have also used Restylane Refyne®, Belotero®, Juvederm Volbella®, and Juvederm Vollure® in this area. In terms
               of technique, we introduce the needle bevel down and advance to the periosteum of the inferior orbital rim
               in order to achieve a sub-orbicularis plane. Deep injection avoids visible product and irregular contour.
               Product is delivered just above the periosteum in multiple small boluses working from medial to lateral.
               Prior to injection, it is important to palpate the orbital rim to avoid advancing past this barrier and into the
               orbit. If midface filler is to be applied, this should be performed prior to tear trough injections, as midface
               volume often decreases the appearance of the tear trough. It is better to under correct than overcorrect in
                                                                            [8]
               this delicate area; typically injections are 0.3-0.4 mL per session, per side .
               Superior sulcus - hollowing of the superior sulcus is one of the earliest signs of aging in the periorbital
                     [13]
               region . Injection should target the underside of the superior orbital rim, again advancing to bone and
               aiming for a sub-orbicularis plane. Subcutaneous injection is also possible, although more superficial
               injections are at a higher risk of poor cosmetic outcome. The supraorbital notch should be palpated prior to
               injection to avoid compromising the eponymous nerve; likewise it is important to avoid injecting into the
               eyelid, staying above the superior sulcus at all times. Take care not to advance the needle far into the orbit,
               as the risk of damage to important structures and retrobulbar hematoma will increase.
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