Brow lift for the correction of visual field impairment

Anatomical Trajectory of the Corrugator Supercilii Muscle in Koreans: Implications for Aesthetic and Clinical Practices

BACKGROUND

Understanding the attachment patterns of the corrugator supercilii (CS) muscle is vital for treatments designed to improve facial symmetry and functionality.

OBJECTIVES

The aim of this research was to elucidate the anatomical trajectory and intricate relationships of the CS within the upper face and midface, specifically focusing on its connections with the frontalis (FT) and orbicularis oculi (OOc) muscles.

METHODS

The CS was examined in 41 specimens of embalmed adult Korean cadavers with microdissection, histological analyses, and microcomputed tomography, performing an in-depth exploration of its anatomical positioning and the intricate interactions with adjacent muscles.

RESULTS

Some lower fibers of the CS extended to the upper orbital part of the OOc in 59.5% of cases, while the CS interdigitated or blended exclusively with the FT in 40.5% of cases. The fibers of the CS demonstrated diverse extensions toward the upper face and midface, exhibiting varied trajectories and lengths. Additionally, lower fibers of the CS extended to significant anatomical landmarks such as the OOc, malaris muscle, and the superficial musculoaponeurotic system (SMAS).

CONCLUSIONS

In this study, we demonstrate that precise understanding of the CS and its relationship with the FT and OOc is crucial for optimizing invasive or noninvasive treatment like botulinum toxin injection, SMAS lifting, and browplasty surgery. The extension of lower fibers of the CS to significant anatomical landmarks indicates complex interactions with adjacent facial structures, highlighting the necessity of detailed anatomical knowledge for clinical applications.

Enhancing aesthetic outcomes: The role of biomechanics in periorbital and eyelid cosmetic surgery

Cosmetic periorbital and eyelid surgery is a commonly performed procedure in facial plastic surgery. Understanding the biomechanics of periorbital anatomy and its role in aesthetic surgery is essential for achieving optimal outcomes. This review explores the biomechanical processes involved in periorbital age changes and analyzes the impact of cosmetic surgery approaches on these processes. By maintaining the initial mechanical equilibrium of the brows, eyelids, septal fat, and blepharoplasty folds, periorbital and eyelid cosmetic surgery can effectively rejuvenate the appearance. Disruption of this equilibrium can lead to the migration of anatomic components, resulting in signs of aging. Surgeons, by applying biomechanical concepts, can tailor the forces exerted upon the different structures to manifest the patient's aesthetic aspirations. The key to success in periorbital and eyelid cosmetic surgery lies in re-establishing a dynamic mechanical equilibrium within the periorbital framework.

Combined Blepharoplasty and Brow Fat Pad Transfer for the Correction of Dermatochalasis and Sunken Upper Eyelids

BACKGROUND

Women commonly experience upper eyelid dermatochalasis and upper eyelid depression with advancing age. Blepharoplasty is a suitable method for treating dermatochalasis, but not sunken eyelid. This study proposed a novel technique for eyelid rejuvenation by simultaneously correcting dermatochalasis and sunken upper eyelids in middle-aged women.

METHODS

Forty patients underwent subbrow blepharoplasty combined with brow fat pad transfer. Ellipse-shaped skin and subcutaneous tissue underneath the eyebrow were measured, demarcated, and excised. The orbicularis oculi muscle beneath the subcutaneous tissue was exposed and dissected in the upper-third area. The brow fat pad was turned downward using the lower edge as the pedicle and was fixed in the layer of retro-orbicularis oculi fat to fill the depressed area in the upper eyelid. The lower muscle flap was fixed to the supraorbital rim periosteum and upper musculocutaneous flaps, thereby forming a cross flap for interlocking fixation. The surgical outcomes were evaluated using a three-dimensional imaging device and the Global Aesthetic Improvement Scale.

RESULTS

The depth and volume of upper eyelid depression decreased significantly 3 months after the surgery and stabilized within 6 months. Global Aesthetic Improvement Scale scores significantly improved after the surgery, and the postoperative outcomes were acceptable.

CONCLUSIONS

The novel technique is simple and effective for simultaneously correcting dermatochalasis and sunken upper eyelids in middle-aged women. The surgical outcomes are predictable and acceptable to most patients.

CLINICAL QUESTION/LEVEL OF EVIDENCE

Therapeutic, IV.

Comparison of Postoperative Scarring in Asian Women After Supra-brow and Sub-brow Blepharoplasty: A Retrospective Study

BACKGROUND

Supra-brow and sub-brow blepharoplasty are two types of upper eyelid blepharoplasties that are commonly performed in middle-aged Asian women to correct skin laxity of the upper eyelid; the postoperative scar formation of the two procedures may be different. Therefore, we designed this retrospective study to explore the differences in postoperative scarring between patients receiving supra- or sub-brow blepharoplasty.

METHODS

We identified 52 patients who underwent supra-brow blepharoplasty and 54 patients who underwent sub-brow blepharoplasty. For each patient, the scar quality was assessed using photographs, the Observer Scar Assessment Scale (OSAS), and the Patient Scar Assessment Scale (PSAS) 1 year following surgery.

RESULTS

For OSAS, higher scores for pigmentation, thickness, relief, pliability, surface, and overall opinion were observed in patients who underwent supra-brow blepharoplasty (p < 0.05) except for the "vascular score" (p = 0.148). The average overall opinion scores of the supra- and sub-brow blepharoplasty were 3.90 ± 0.41 and 2.33 ± 0.48, respectively, indicating that acceptance of postoperative scars in patients who underwent supra-brow blepharoplasty was worse than that in patients who underwent sub-brow blepharoplasty. Significantly higher scores were observed in all items of PSAS items for patients with supra-brow blepharoplasty (p < 0.05).

CONCLUSIONS

The postoperative scars in patients who underwent supra-brow blepharoplasty were more obvious than those in sub-brow blepharoplasty. From the perspective of postoperative scar formation, sub-brow blepharoplasty may be a more suitable choice for patients.

LEVEL OF EVIDENCE V

This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

Microanatomy of the Frontal Branch of the Facial Nerve: The Role of Nerve Caliber and Axonal Capacity

BACKGROUND

A commonly seen issue in facial palsy patients is brow ptosis caused by paralysis of the frontalis muscle powered by the frontal branch of the facial nerve. Predominantly, static methods are used for correction. Functional restoration concepts include the transfer of the deep temporal branch of the trigeminal nerve and cross-facial nerve grafts. Both techniques can neurotize the original mimic muscles in early cases or power muscle transplants in late cases. Because axonal capacity is particularly important in cross-facial nerve graft procedures, the authors investigated the microanatomical features of the frontal branch to provide the basis for its potential use and to ease intraoperative donor nerve selection.

METHODS

Nerve biopsy specimens from 106 fresh-frozen cadaver facial halves were obtained. Histologic processing and digitalization were followed by nerve morphometric analysis and semiautomated axon quantification.

RESULTS

The frontal branch showed a median of three fascicles (n = 100; range, one to nine fascicles). A mean axonal capacity of 1191 ± 668 axons (range, 186 to 3539 axons; n = 88) and an average cross-sectional diameter of 1.01 ± 0.26 mm (range, 0.43 to 1.74 mm; n = 67) were noted. In the linear regression model, diameter and axonal capacity demonstrated a positive relation (n = 57; r2 = 0.32; p < 0.001). Based on that equation, a nerve measuring 1 mm is expected to carry 1339 axons.

CONCLUSION

The authors' analysis on the microanatomy of the frontal branch could promote clinical use of cross-facial nerve graft procedures in frontalis muscle neurotization and free muscle transplantations.

Functional Reconstruction of Forehead and Midface Deficits Using the Endoscopic Technique and Bio-Absorbable Implants

Objectives

Functional deficits of the forehead and midface can pose significant problems for patients varying from mild asymmetry to various degrees of functional impairment including total paralysis. Our objectives were to analyse the use of bio-absorbable implants to reconstruct forehead and midface deficits, all of which were for functional (noncosmetic) reasons.

Methods

This study was a retrospective case series between 2008 and 2018. Institutional review board approval was obtained from the Beaumont Health Human Investigation Committee. Surgeries were performed at a tertiary care centre. We evaluated 50 patients who underwent correction of functional deficits of forehead, eyebrow, and midface using the endoscopic technique and bio-absorbable implants. Patient demographics and indicated etiologies and characterization of minor and major complications and their occurrence rates were characterized.

Results

Fifty patients were included in the study from 2008 to 2018, with 68% female and 32% male. Combined blepharoplasty and brow lift was the most commonly performed procedure, followed by midface lift and browplasty. The mean follow-up time was 372 days. No major operative complications including stroke, permanent nerve paralysis, or mortality occurred. There was a 4% rate of temporary nerve paresthesia that resolved, 2% rate of infection, and 6% rate of implant migration requiring revision surgery.

Conclusion

The endoscopic approach and use of bio-absorbable implants to reconstruct functional deficits of the forehead and midface are safe and effective. There were zero major complications and most of the minor complications were temporary. There was a significant association between non-age-related functional impairment and risk of complication.

The Deep Temporal Nerve Transfer: An Anatomical Feasibility Study and Implications for Upper Facial Reanimation

BACKGROUND

Facial paralysis has a profound impact on the brow, and currently static procedures are the mainstay of treatment. The deep temporal branches of the trigeminal nerve, given their proximity to the brow, may serve as possible donor nerves for both potential innervation of a free muscle transfer in patients with prolonged facial palsy or nerve transfers in acute or subacute palsy. As such, the authors present the detailed surgical anatomy of the deep temporal nerve, assessing feasibility for both functional muscle and nerve transfers, including a proposed surgical technique.

METHODS

Thirty cadaver hemifaces were dissected to establish deep temporal nerve anatomy and perform axonal analysis.

RESULTS

Two (53 percent) or three (47 percent) divisions of the deep temporal nerve were noted, with the most consistent division being the middle division (30 of 30 specimens). This division was consistently found approximately 4.1 cm (range, 3.7 to 4.5 cm) anterior to the tragus at the level of the zygomatic arch. For each 1 cm cranial to the arch, the nerve courses approximately 1 mm posteriorly. The number of axons in the proposed temporal branch is 1469 as it emerges from behind the zygomatic arch, 889 at 1 cm, 682 at 2 cm, 534 at 3 cm, 355 at 4 cm, 377 at 5 cm, and 256 at 6 cm.

CONCLUSION

Given its anatomical consistency, and expendability, the middle division of the deep temporal nerve is a viable donor nerve for dynamic upper facial reanimation with either nerve transfer or functional muscle transfer, depending on the length of facial palsy.

CLINICAL QUESTION/LEVEL OF EVIDENCE

Therapeutic, V.

Objective Brow Height Measurements Following Pretrichial Brow Lift and Upper Lid Blepharoplasty

BACKGROUND

As the ptotic brow drops below the supraorbital rim, it can exacerbate dermatochalasis by pushing the adjacent skin of the upper lid further down.

AIM

The purpose of this study was to evaluate the outcomes associated with a combined pretrichial brow lift and upper lid blepharoplasty in patients with dermatochalasis and mild to moderate brow ptosis.

MATERIALS AND METHODS

A retrospective case series of 46 patients with dermatochalasis and mild to moderate brow ptosis treated with a combined, bilateral pretrichial brow lift and upper lid blepharoplasty from January 2008 to December 2011. Main outcome measures included measurements of brow lift at 3 months post-operatively, complications encountered, patient satisfaction and surgeon satisfaction.

RESULTS

Outcomes from 46 patients were evaluated. The mean brow lift was 1.85 mm at the lateral canthus, 1.54 mm at the lateral limbus, 1.31 mm at the mid-pupil, and 1.07 mm at the medial limbus. Brow lift at the lateral canthus was significantly more elevated than at the medial limbus (P < 0.001). Minor complications were encountered in seven of 46 patients (15.2%). Mean patient satisfaction score was 3.20 and surgeon satisfaction 3.24 (max = 4, very satisfied).

CONCLUSIONS

The modified pretrichial brow lift offered effective lateral lift that complements an upper lid blepharoplasty. This technique was met with a high degree of patient and surgeon satisfaction, and had a minimal complication profile.

Direct brow lift combined with suspension of the orbicularis oculi muscle

BACKGROUND

Although the conventional direct brow lift operation provides a simple means of managing lateral brow ptosis, the scars produced have been unacceptable. However, using the modifications proposed here, scarring showed remarkable improvement. This article reviews our experiences with the presented technique, mainly with respect to postoperative scarring.

METHODS

Measured amounts of supra-eyebrow skin and subcutaneous fat were excised en bloc in the conventional manner under 'hyper-hydrated' local infiltration anesthesia. The lower flap and the edge of the upper flap were undermined above the muscular plane, and the orbicularis oculi muscle was directly suture-plicated and suspended upward to the distal frontalis muscle. Skin closure was performed in a basic plastic surgical manner.

RESULTS

From April 2007 to April 2012, a consecutive series of 60 patients underwent surgery using the above method. The average width of the excised skin was 8 mm (range, 5-15 mm) at the apex of the eyebrow. Preoperative complaints were resolved without occurrence of significant complications. The surgical scars showed remarkable improvement and were negligible in the majority of the cases.

CONCLUSIONS

The direct brow lift operation combined with plication/suspension of the superior and lateral portion of the orbicularis oculi muscle provides a simple, safe, and predictable means of correcting lateral brow ptosis. The scars were acceptable to all of the patients. For proper management of the frontalis tone, upper blepharoplasty and/or repair of eyelid levator function must be considered in addition to brow lift procedures.

Complications of browlift techniques: a systematic review

BACKGROUND

There is ongoing debate over which surgical technique is the safest for brow elevation.

OBJECTIVES

The authors outline complication rates for a variety of open and endoscopic browlift techniques based on the results of a literature review.

METHODS

The following databases were searched to capture relevant studies: MEDLINE, EMBASE, CINAHL, LILACS, Web of Science, Cochrane Libraries, controlled-trials.com, and clinicaltrials.gov. Eighty-two studies met the inclusion criteria. Assuming between-study heterogeneity due to the limitations and biases inherent to case series, a random-effects model was used to calculate weighted proportions. Pooled weighted proportions with 95% confidence intervals were determined.

RESULTS

All open and endoscopic procedures are associated with a variety of complications. Unacceptable scarring and paresthesia are the most common complications among all surgical browlifts. For anterior hairline incision with subcutaneous dissection, alopecia occurred in 8.5% of patients, paresthesia in 5.4%, unacceptable scarring in 2.1%, and skin necrosis in 1.8%. For coronal incision with subgaleal dissection, unacceptable scarring occurred in 3.6% of patients, hematoma in 0.5%, and infection in 0.2%. Endoscopic techniques with subperiosteal dissection had the highest complication rates: 6.2% for paresthesia, 3.6% for asymmetry, 3.0% for alopecia, and 2.7% for lagophthalmos.

CONCLUSIONS

Although complication rates vary with respect to incision site and plane of dissection, endoscopic techniques are associated with a larger variety of complications than open approaches. The findings should be interpreted with caution due to the limitations inherent to a case series. A well-designed comparative study is needed to evaluate the "true" rate of complications among the various browlift techniques.

Upper lid blepharoplasty, eyebrow ptosis, and lateral hooding

BACKGROUND

Upper blepharoplasty is a common aesthetic surgical procedure. Different surgical techniques and markings have been described, some of which may incorporate browpexy or browlifting. Considering the upper periorbital area as an aesthetic unit, various techniques of browpexy and browlifting have been taken into consideration.

OBJECTIVES

The authors describe their technique for upper blepharoplasty, which includes an extended cutaneous excision that permits good correction of lateral hooding, reducing the need for browpexy or browlifting. Indications and surgical outcomes are also presented.

METHODS

The authors retrospectively reviewed the records of 552 consecutive patients who underwent upper blepharoplasty according to the authors' technique between January and December 2008. The patients received local anesthesia. Cutaneous excision extended beyond the eyelid to include the lower lateral portion of the eyebrow area.

RESULTS

Optimal functional correction was achieved in all cases, and the majority of patients were pleased with their aesthetic result. No significant complications occurred; 4 minor complications were noted and are described fully in the text.

CONCLUSIONS

The authors' modification of the usual technique of blepharoplasty results in excellent correction, both functional and aesthetic, of the periocular area, particularly the lateral portion. The technique is safe, and patient satisfaction is high.

LEVEL OF EVIDENCE

4.