Lower Eyelid and Midcheek Rejuvenation

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The lower eyelid and midcheek are areas that patients commonly present with, usually with the complaint of eye bags or just “looking tired.” Intuitively, it should be appreciated that these patients are actually looking for rejuvenation of the midcheek and to look more youthful, not merely for the elimination of the eye bags. The eye bags – bulging of the preseptal segment of the lower lid – is perhaps one of the earliest signs of facial aging, accordingly the patients come in complaining of the deformity. It is, however, certainly not the sole physical change responsible for the features of the aging midcheek. Collectively, these changes result in the “tired” look. Accordingly, removal of the eye bags alone, without concomitantly addressing other aspects of the aging midcheek, will lead to disappointment for the patient and the surgeon. In order to rejuvenate the midcheek, each component that changes with aging has to be addressed. Accordingly, technique selection depends on the specific aging changes needing to be addressed for the individual patient. Understanding the surgical anatomy is the key to the development of anatomically sound surgical approaches, that are effective, while minimizing trauma from the surgery and thereby reducing downtime and complications. ,

The Youthful Midcheek

The principles of the construction of the facial soft tissues and the key concepts of facial gliding planes, called facial soft tissue spaces, and facial retaining ligaments have been discussed in our chapter on facial aging ( Chapter 62 ). The youthful midcheek is full and firm located high on the cheeks. The contour is smooth, without surface grooves or bulges. The pretarsal bulge, anatomically the pretarsal part of the orbicularis oculi, may be prominent relative to the preseptal part, and is the visual location of the junction of the lower eyelid and cheek – the so-called lid–cheek junction. What is called the youthful lid–cheek junction is high and actually on the lid itself, above the midcheek! This high lid–cheek junction appearance is so profound that it dominates over other aging areas of the face for the overall perception of youth and vigor.

Changes of the Midcheek with Aging

With aging, changes occur at the two fundamental levels: the midcheek skeleton and the overlying soft tissues . The midcheek skeleton, especially the maxilla medially, retrudes significantly with aging ( Fig. 65.1 ). , The resultant loss of projection and support for the overlying soft tissues predisposes to sagging of the tissue, which gives the visual impression of loss of soft tissue volume. Where the soft tissues overlie retaining ligaments the skin remains firmly attached to the underlying skeleton and manifests as surface grooves, given different names at different locations on the face. These include the nasojugal groove, so-called tear trough deformity, medially and midcheek furrow more laterally, whereas over the facial soft tissue spaces laxity in the roof of the space manifests as a surface bulge. In the lower eyelid, bulging over the preseptal space results in the development of eye bags. Laxity over the roof of the prezygomatic space is the anatomical basis for malar mounds or bags. This combination of relatively strong fixation in areas directly overlying retaining ligaments contrasted with laxity of tissue in the roof of adjacent soft tissue spaces results in segmentation of the midcheek into three segments – the lid–cheek, malar, and nasolabial segments ( Fig. 65.2 ). The visual location of the lid–cheek junction moves inferiorly to the groove formed by the tear trough ligament and the orbicularis retaining ligament, resulting in a lowered lid–cheek junction, which is a feature of aging.

Fig. 65.1

The areas of the facial skeleton documented in the literature that selectively resorb with aging. The arrow size indicates the relative tendency for bone loss. Note the strong tendency for the medial midcheek (the maxilla) to resorb with aging, resulting in significant loss of projection of the overlying soft tissues.

From Mendelson B, Wong C-H. Facelift: Facial anatomy and aging. In Rubin JP, Neligan PC, eds. Plastic Surgery . Volume 2: Aesthetic Surgery . 4th edn. Elsevier; 2018: Fig. 6.1.17. © Dr. Levent Efe, CMI.

Fig. 65.2

In youth, the spaces are tight, being more potential than real. The retaining ligaments are stout and the transition between spaces is not discernible. With aging, the spaces expand to a greater extent than the laxity that develops in the ligaments within their boundaries, resulting in bulges between areas of relative fixation. This results in the “segmentation” of the midcheek into three characteristic segments; the lid–cheek, malar, and nasolabial segments.

From Mendelson B, Wong C-H. Facelift: Facial anatomy and aging. In: Rubin JP, Neligan PC, eds. Plastic Surgery. Volume 2: Aesthetic Surgery . 4th edn. Elsevier; 2018: Fig. 6.1.19. © Dr. Levent Efe, CMI.

Surgical Anatomy and Dissection Planes

This combination of skeletal retrusion with the resulting weakening of the support for the overlying soft tissues and the propensity for the midcheek soft tissue to develop specific areas of laxity results in the prototypical and predictable changes seen with aging in the midcheek. To restore and rejuvenate the midcheek soft tissues, the logical approach is to surgically address these aging changes directly at the level these changes are occurring. To produce natural results and minimize downtime associated with surgical dissection, the key is to utilize the midcheek facial soft tissue spaces, which are preexisting gliding planes that are avascular with no vital structures traversing within ( Fig. 65.3 ). To access these spaces, the retaining ligaments in the boundary of the spaces must be sharply released. Once released, the surgeon will note the profound mobility of the roof with traction. This approach may be summarized as “through the facial soft tissues spaces with precise release of intervening retaining ligaments approach.” In terms of dissection plane, this is a sub-SMAS (superficial musculoaponeurotic system) dissection. This concept will be detailed in the surgical techniques below. Aging of the facial skeleton may be addressed by skeletal augmentation, using either hydroxyapatite bone substitute, structural fat grafting or facial fillers.

Fig. 65.3

The midcheek soft tissue spaces and facial retaining ligaments.

From Mendelson B, Wong C-H. Facelift: Facial anatomy and aging. In: Rubin JP, Neligan PC, eds. Plastic Surgery . Volume 2: Aesthetic Surgery . 4th edn. Elsevier; 2018: Fig. 6.1.11. © Dr. Levent Efe, CMI.

Patient Selection

Patient selection is key in ensuring the delivery of results that are gratifying for the patient and surgeon. In general, patient with early aging changes may be treated with nonsurgical methods with good results. While noninvasive methods are appealing, it is a camouflage technique that provides no correction of the underlying anatomy for a long-term solution to rejuvenate the patient, and requires repeated treatments with associated risks. Modern advanced minimally invasive techniques (extended transconjunctival approach) are indicated for the majority of patients that one would consider for treatment with facial fillers. Significantly, the transconjunctival approach provides a long-term result compared with the use of fillers. It is up to the individual patient and plastic surgeon to decide on the approach to be used. For patients with more significant aging changes, a more aggressive approach incorporating some form of midcheek tightening is required to deliver a more profound rejuvenation.

Nonsurgical Techniques

A nonsurgical approach has become extremely popular with doctors of various expertise levels performing these procedures. Nonsurgical technique for rejuvenation of the midcheek is primarily delivered via the use of fillers. Fillers may be broadly classified into synthetic and autologous materials. The most commonly used synthetic fillers are hyaluronic acid (HA)-based. A variety of semi-permanent and permanent fillers are available in different markets. The authors recommend the use of HA-based fillers only as in the event of adverse outcomes or complications an antidote (Hylase) is available to dissolve and remove the unwanted filler material. Fat grafts are an autologous filler. The benefits of autologous tissues are they integrate with the facial soft tissue, are long lasting (when done correctly), and give benefits beyond volumization from mesenchymal stem cells in the transferred fat. The disadvantages are that harvesting of the fat is required and the procedure is more technically demanding. Fat grating, however, is usually used as an adjunct to surgical treatment and the discussion below pertains specifically to the use of HA-based fillers.

As discussed, aging is a multifactorial process, involving retrusion of the midcheek skeleton and laxity/sagging of the tissues. Fillers work by providing volume/support that to a certain degree compensates for the retrusion of the facial skeleton thus providing a subtle rejuvenating effect. Used in combination, fillers and neurotoxins soften the tear trough (TT) deformity in appropriately selected patients, in general, patients with early aging changes looking to have a little freshening up. Fig. 65.4 illustrates patient classification for treatment with injectables. This degree of “softening” is usually sufficient and may even be very satisfying for grades 1 and 2 TT deformity. As the tear trough ligament cannot be released or divided with nonsurgical techniques, the correction achievable in more advanced tear trough deformities (grades 3 and 4 TT) is generally insufficient and a surgical approach is needed.

Fig. 65.4

A grading system for the tear trough (TT) deformity. Top row: Grade 0 TT: This is a youthful lower eyelid. The lid–cheek junction is high with no evident tethering seen from the tear trough ligament. A pretarsal bulge (from a hypertrophic orbicularis oculi) may (right image) or may not (left image) be present. Second row: Grade 1 TT: The tear trough is seen in repose as a shallow groove extending from just below the medial canthus to (but not extending beyond) the medial pupil line. Eye bags are absent and a pretarsal bulge may (right image) or may not (left image) be present. Third row: Grade 2 TT: The clinical findings are similar to Grade 1 TT but with the addition of the presence of eye bags. Fourth row: Grade 3 TT: The tear trough becomes continuous with the palpebromalar groove with a visually distinct (and low) lid–cheek junction (or separation). Eye bags are seen and midcheek retrusion and ptosis seen below this. Fifth row: Grade 4 TT: A sharply demarcated and continuous lid–cheek junction is seen. Prominent eye bags above and midcheek descent and retrusion is seen below the lid–cheek junction.

Filler for the correction of the tear trough deformity and camouflaging mild eye bags may be placed deep and/or superficial. Deep placement of the filler should be placed caudal to the tear trough ligament on the anterior maxilla ( Fig. 65.5 ). Fillers here function to correct the skeletal/maxillary retrusion (which may be congenital in some patients or as a result of anterior maxillary resorption with aging in older patients) as well as the deflation that occurs with aging. This correction restores the soft tissue support inferior to the tear trough ligament and prevents the soft tissues from “dragging” on the tear trough ligament. The tethering effect is thus reduced and in some patients eliminated, resulting in a smoother lid–cheek junction. As the placement is deep and for the purpose of skeletal augmentation, the volume of filler material needed is relatively large; depending on the degree of maxillary retrusion, generally 0.1–0.5 mL per side over the anterior maxilla. Either blunt cannulas or needles may be used for deep injections. As for the type of product, a softer product should be used due to the very thin soft tissues in this area ( Fig. 65.6 ). Fillers should not be placed above the tear trough ligament as placement here will worsen the tear trough deformity, similar to the effect eye bags have on the tear trough deformity. Superficial placement, in contrast, is for a different purpose. It is to correct the superficial wrinkling that is seen in some patients. As the skin is very thin and delicate at the tear trough, the amount of filler material needed (or can be injected) is very little, no more than 0.05–0.2 mL per side. As for the type of product, only very thin or fluid material should be used.

Fig. 65.5

The anatomy of the tear trough ligament.

From Mendelson B, Wong C-H. Facelift: Facial anatomy and aging. In: Rubin JP, Neligan PC, eds. Plastic Surgery . Volume 2: Aesthetic Surgery . 4th edn. Elsevier; 2018: Fig 6.1.14. © Dr. Levent Efe, CMI.

Fig. 65.6

(A,B) This 26-year-old woman presented with eye bags and looking tired. She had congenitally retruded maxillae with inadequate skeletal support, which resulted in the premature appearance of eye bags. She has Grade 2 tear trough, no laxity of her soft tissue, and small eye bags, and is a good candidate for filler injections. Correction was achieved by preperiosteal (deep) placement of a soft hyaluronic acid filler (1 mL) inferior to the tear trough ligament to enhance the skeleton. A soft filler is preferred for correction of the tear troughs to reduce palpability in this area of thin soft tissues.

Neurotoxins complement the use of fillers in the correction of the tear trough deformity, by relaxing the orbicularis oculi located above the tear trough ligament. The microbotox technique is preferred in the tear trough (about 2–4 units in 0.3 mL of saline) injected in a very superficial level raising blebs above and below the tear trough ligament to give a more even relaxation of the muscles.

Complications of Injectables in the Midcheek

The use of fillers and botox in the tear trough is technically difficult. Potential complications include bruising from injuring the angular vein (more commonly) or the angular artery, prolonged swelling, lumpiness (that results from too much filler being injected or, over the long term, granuloma formation), surface irregularity (from placement of the product too superficially), and bluish discoloration over the medial midcheek. The bluish discoloration is the result of the Tyndall effect from placement of too much product too superficially. More severe complications included vascular compromise with skin necrosis and blindness due to intravascular injection and embolization of the filler materials.

Significantly, and perhaps not commonly discussed, are the undesirable effects of filler overuse. Filling is beneficial only up to a degree. Fillers cannot be used to address laxity or sagging that logically should be addressed with some form of tightening/lift. Accordingly, when more significant aging has manifest, surgical intervention is indicated. Attempting to correct the laxity by injecting more filler in the erroneous belief that filling the cheeks out would take up the laxity is flawed thinking. All plastic surgeons have seen the unnatural appearance of the “overfilled syndrome” that has resulted from this misguided approach.

A further adverse effect of the use of fillers is the relatively high incidence of granuloma formation in the long term. This present a problem for the surgeon as many patients these days would have some fillers injected. When these patients present for surgery, it is best to dissolve these granulomas with a mixture of Hylase (if these were HA-based fillers) and steroids at least 1 week prior to surgery. If this is not feasible, then it must be done immediately before the surgery in combination with the administration of local anesthetic.

Surgical Correction of Midcheek Aging

Surgery remains the gold standard for natural and lasting rejuvenation of the midcheek. Two main approaches to midcheek and eye bags may be used: the transconjunctival approach or the subciliary (transcutaneous) approach. Each has its specific indication, benefits, and risks. Correction of the midcheek skeletal retrusion with fat grafting or skeletal augmentation may be used as adjunctive procedures with either approach. The selection of the approach depends primarily on the extent of aging changes present and the patient’s specific requests.

Extended Transconjunctival Lower Eyelid Blepharoplasty

The transconjunctival lower eyelid blepharoplasty offers an advantageous access to the lower eyelid and midcheek because of its safety (by avoiding trauma to the anterior lamella of the lower eyelid) and its quick recovery. The transconjunctival fat removal only type of procedures are very popular, effective for patients with true lower eyelid fat pad excesses, and easy to perform. The benefit of the procedure is limited to the lid–cheek segment of the midcheek due to the limited nature of the dissection. However, for more profound rejuvenation via the transconjunctival approach, it is necessary to take the dissection significantly caudal to the orbital rim. . , , , This type of procedure, called the extended transconjunctival approach, as described below, is more versatile and powerful to address aging changes of the midcheek. This approach is good for patients with prominent eye bags, with tear trough deformity with minimal laxity of the midcheek soft tissues. In patients with midcheek loss of projection, structural fat grafting may be performed at the same time.

Markings and Preparation

Preoperatively, with the patient upright, the location and amount of fat pads to be removed are determined and marked. A mental image of the expected fat to be excised should be visualized as the key component to good results is precise removal of fat. The midcheek groove, anatomically formed by the tear trough ligament and orbicularis retaining ligament, that needs to be released is also marked. The procedure can be performed either under local or general anesthesia. The cornea is anaesthetized with 2 drops of Alcaine 0.5% eye drops (Alcon-Couvreur, Belgium). The cornea is lubricated with some Duratears (Alcon-Couvreur) and protective corneal eye shield placed. The conjunctiva, lower eyelid, and midcheek are anaesthetized with a mixture of 10 mL of 1% ropivacaine, 10 mL 1% lidocaine and 0.25 mL of 1:1000 adrenaline. The lower lid, midcheek and lateral orbital rim is infiltrated with a total of 3 mL of the local anesthetic mixture each side.

Surgical Technique

See Video 65.1 for demonstration of the authors’ surgical technique. With two fine skin hooks applying gentle upward traction on the lower eyelids, an approximately 15-mm transconjunctival incision is made about 2 mm inferior to the lower edge of the tarsus using a sharp point diathermy, incising through the conjunctival and lower eyelid retractors. The skin hooks are replaced by a small, insulated Desmarres retractor. The preseptal space is bluntly entered with a tenotomy scissors. The orbital septum is then opened directly over the areas where the fat pads would be removed. The orbital fat pads are excised as indicated and meticulous hemostasis performed.

The Desmarres is replaced with the blunt end of a cat’s paw retractor and the preseptal space then bluntly developed to its boundaries with a gentle sweeping motion with a cotton bud, carefully looking for the white line that defines the location of the arcus marginalis. A key landmark, the origin of the palpebral part of the orbicularis oculi is located slightly caudal to the arcus marginalis. With the assistant holding the retractor upwards and the surgeon pushing the orbital septum down with the cotton bud, the orbicularis oculi is sharply released with cutting cautery at its bony origin. The palpebral part of the orbicularis oculi, tear trough ligament, and the orbital part of the orbicularis oculi are sequentially released, taking care that the dissection stays close to the anterior maxilla. The end point of the release is the visualization of muscular fibers of the levator labii superioris. This heralds the entrance into the premaxillary space and, accordingly, the complete release of the tear trough ligament ( Fig. 65.7 ). More laterally, the medial part of the orbicularis retaining ligament is also released.

May 23, 2021 | Posted by in General Surgery | Comments Off on Lower Eyelid and Midcheek Rejuvenation
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