Lip Implants


Article Author:
Sabrina Brody-Camp


Article Editor:
Blake Raggio


Editors In Chief:
Brian Downs
Ziad Katrib


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Khalid Alsayouri
Kyle Blair
Radia Jamil
Erin Hughes
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Saad Nazir
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Sarosh Vaqar
Mark Pellegrini
James Hughes
Beenish Sohail
Hajira Basit
Phillip Hynes
Sandeep Sekhon


Updated:
9/18/2019 5:22:30 PM

Introduction

Full lips carry aesthetic associations with a youthful and attractive appearance of the lower face. Lip augmentation is used to improve the dimensional relation of the lips to the patient's face by increasing vermilion height, creating pout (effacement), softening perioral lines and wrinkles, adding volume, and reducing excess visible dentition. The ideal lip augmentation procedure should provide aesthetically pleasing results that are natural in appearance and feel, be reversible and/or replaceable, be adjustable, and have a low complication rate. A variety of lip augmentation techniques have been described, including both non-filling (e.g., lip lift, mucosal advancement) and filling techniques (e.g., injectable fillers, fat augmentation, implants). Currently, filler with hyaluronic acid injection represents the primary agent used for lip augmentation. That said, lip implantation using alloplastic implants represent an alternative lip augmentation technique that is cost-effective (in comparison to repeated injectable filler applications), long-lasting, and provides aesthetically pleasing results with relatively few complications. Herein, we will focus our discussion on lip augmentation using permanent alloplastic implants.[1][2]

Anatomy

The lips divide into “red” and “white” components. The red lip is a mucous membrane, while the white lip is a cutaneous structure. The vermilion border represents the mucocutaneous junction (i.e., the demarcation between the red and white lip). The red lip further subdivides into a dry and wet portion, with the former located along the anterosuperior portion of the red lip. The upper lip is composed of the philtrum and tubercle centrally, the paired philtral columns laterally, and the white roll of the vermilion border. The orbicularis oris muscle, which is innervated by the motor branches of the facial nerve, maintains oral competence by acting as a circumoral sphincter. The horizontal fibers of this muscle attach to the modiolus and philtral columns, with contraction producing a tightening of the upper lip.[1][3][4]

Skin laxity associated with aging causes lengthening of the cutaneous portion of the lip, occurring in concert with shortening of the visible mucosal surface and flattening of the lip overall. The vermillion inverts, resulting in decreased lip pouting. Lips of advanced age take on a two-dimensional, flattened appearance compared to the fuller, pouty, youthful lip. Volume restoration reestablishes the three-dimensional structure of youth. The lower lip is less commonly thin in isolation, largely because it is less prone to shrinkage over time.[1][5]

Indications

Hypoplastic lips are the primary indication for lip augmentation, which may be age-related or not. While a variety of injectable fillers are available (e.g., hyaluronic acid), they are temporary, requiring repeated injections at several month intervals to sustain lasting results. For patients who have needle-phobia or who are looking for a more permanent and more cost-effective solution to lip augmentation (relative to undergoing repeated injections with fillers), lip implantation with an alloplastic implant is the option of choice.[1][6] 

Areas of the lip/peri-oral region addressed with lip implantation[2]:

  • Decreased vermilion height
  • Decreased pout (lack of effacement)
  • Perioral lines and wrinkles
  • Decreased volume (fat and muscle atrophy)
  • Excess visible dentition

Guidelines to improve aesthetic outcomes with lip augmentation (to avoid "duck" or "sausage" lips[7][8]:

  • Lip surface area: the most attractive lip augmentation should create roughly a 50% increase in surface area from baseline. Note: lip surface area should equal approximately 10% of the lower third of the face. 
  • Lip vertical height (assessed on frontal view): the upper to lower lip height ratio should be between 1 to 1.6 and 1 to 2 (i.e., the lower lip should be taller than the upper lip).
  • Lip projection (assessed on lateral view): referencing a straight line from the subnasale to the pogonion, the upper lip projection should be 3.5 mm anterior to the line and the lower lip 2.2 mm, roughly equal to a 1.6 to 1 ratio (i.e., the upper lip projections should be slightly more than the lower lip) 
  • Lip width: should be approximately 40% of the width of the lower face

Contraindications

First and foremost, lip implants will not correct pre-existing lip asymmetry, which fillers such as hyaluronic acid address better. Secondly, a relative contraindication to lip implants is “razor-thin” lips, where insufficient tissue or vermilion show may preclude fitting even the smallest (3 mm) alloplastic implant.[6] In patients with thin lips, the implant may become visible due to aggressive distension of the mucosa, or be at increased risk of extrusion or infection. In the circumstance that a patient with excessively long white lip and thin red lips desires lip augmentation with alloplastic implants, the surgeon should first perform a lip lift and/or mucosal advancement procedure 3 to 6 months prior to lip implantation.[2][9]

Equipment

A typical soft tissue or plastic surgery pan, and additional materials should include:

  • Marking pen
  • paper ruler
  • No. 15 blade
  • Small straight sharp scissors (e.g., Iris)
  • Tendon passer
  • Forceps
  • Suture materials (4-0 Chromic or Vicryl) 

Though there have been many implant materials used, currently there exist several types of implants that may be safely used, depending on the preference of the surgeon and/or the patient[1][6][9][10][11][12]:

Autogenous implants:

  1. Fat - usually harvested via concomitant face, neck, or body liposuction, the surgeon typically places the fat via injection or cannula technique, similar to augmentation with fillers. NOTE: fat augmentation may result in prolonged swelling, asymmetry, or a nodular appearance given due to its unpredictable absorption/survival rate (especially in mobile areas such as the lips).[13]
  2. Superficial musculoaponeurotic system (SMAS) – harvested during a concomitant facelift
  3. Postauricular fascia – temporalis muscle fascia
  4. Scar tissue (if available, usually from previous facelift/neck lift scars)

Alloplastic implants:

  1. Extended polytetrafluoroethylene
  2. Silicone – commercially marketed and available in 3 diameters (3, 4, and 5 mm) and three lengths (55, 60, and 65 mm). The standard size most routinely used in practice is the 4-mm-wide prosthesis.

To improve aesthetic outcomes and lessen complications, the surgeon must be prudent in choosing the correct implant size. First, use a conformable ruler (e.g., paper ruler) to measure the distance of the wet-dry lip from commissure to commissure, with the lips slightly parted. NOTE: do not measure the patient's lips with the mouth open. The optimal prosthesis length should be several millimeters less than the commissure-commissure distance. Because of the curved shape of the upper lip compared to the lower lip, it is not uncommon for implant sizes of the upper and lower lip to differ.[2]

Personnel

Though not necessary, an assistant (often a surgical scrub technician) is useful to help with instrument delivery and/or retraction if needed.

Preparation

Medications

  • As for most cosmetic procedures, patients are often asked to abstain from smoking and use of any blood-thinning agents within 1 to 2 weeks of the procedure. Some surgeons will require antiviral medication starting one day prior to surgery and continuing for ten days postoperatively to prevent posttraumatic herpetic lesions.[6]

Marking

  • First, the surgeon must measure the lip to ensure appropriate implant sizing; the measurement is from oral commissure to oral commissure along the wet-dry junction of the red lip. Implants that are too short will have visible tapered ends shy of the commissure.[9] The wet-dry junction of the red lip should be marked, as this helps ensure a uniform dissection pocket.

While lip implantation is performable under general anesthetic, most surgeons elect to perform lip implants under local anesthesia. A regional block is performed using an injection of a buffered solution of 1% lidocaine with epinephrine (1 to 100000) targeting the infraorbital and mental nerves bilaterally. Then, each commissure gets infiltrated. Finally, the local anesthetic is injected into the deep submucosa of the lip along the previously marked wet-dry border, with care to remain superficial to the orbicularis oris muscle.[6]

Technique

Herein we describe lip implantation using an alloplastic implant, a quick and straightforward technique with little downtime that is well-tolerated, safe, and provides a natural look and feel to the lips.

After the patient is prepped and draped in a sterile fashion, 4 to 5 mm transverse commissural incisions are made bilaterally with a sharp scalpel (the commissural incision prevents medial displacement). Using small, straight operating scissors (e.g., Iris), a uniform submucosal pocket is developed in the lip along the wet-dry border to the midline. Dissection should be in a deep submucosal plane and limited to 2 mm from the marked wet-dry line to reduce the chance of depth malposition and implant migration, respectively. It is essential to maintain a consistent depth along the length of the lip to ensure an even appearance. Also, avoiding making the pocket too superficial will prevent the tapered ends of the implant from becoming visible. This same maneuver is performed from the commissural incision on the contralateral side, resulting in the convergence of the two pockets into a single tunnel along the entire length of the wet-dry lip.

Next, a curved tendon passer is advanced from one end of the submucosal tunnel to the other until it emerges from the contralateral incision. The implant is grasped with the passer and brought through the tunnel until both ends of the implant are exposed. The implant is then “flossed” from side to side until equal lengths extend beyond the commissural incisions. (Note: some authors recommend using smaller implants that do not span the entire width of the commissure to mitigate migration). Finally, the ends of the implant get embedded underneath the commissural incisions. If the surgeon is placing lower lip implants, they are done in the same fashion, through the same incisions, also using a submucosal dissection plane. A 4-0 absorbable suture (chromic or vicryl) is used to close the incisions in either simple interrupted, figure-of-eight, or mattress fashion. Regardless of the suture or technique used, incorporating deep submucosa and muscle within each stitch will help mitigate migration.

NOTE: The technique described above is usable with either alloplastic or autogenous implants.[6][9]

Complications

Lip implants represent a lasting, low-risk option for augmenting the lips with high satisfaction rates; however, the patient undergoing lip implantation should be aware of the potential associated risks, which include[3][6][14]:

  • Malposition (7 to 10%): The most common complication of lip implantation is malposition, which is likely due to uneven tunneling in the submucosal plane or asymmetry in placement. 
  • Extrusion (less than 1%): extrusion of an implant may occur if severe asymmetry and wound breakdown occur. This extrusion is avoidable by using the correct size implant, maintaining proper dissection planes, maintaining a small/narrow submucosal pocket, and using sound suture technique to close the commissure incisions. Instructing the patient to avoid heavy manipulation of the implanted area (e.g., talking, chewing, massaging) for the first several days after implantation may also help prevent malposition/extrusion.
  • Need for revision/size adjustment (1 to 10%)
  • Capsular Contracture (1%): expanded polytetrafluoroethylene implants, in particular, have been shown to shrink and contract with time, leading to an irregular and often asymmetric contour. As a result, their use has gone mostly out of favor.
  • Infection (less than 1%): Infection is rare, but it may result from any type of implant.; this can typically be treated with systemic antibiotics, though may require implant removal if the infection is severe.
  • Dissatisfaction (1%)
  • Dissatisfaction requiring removal (4%)
  • prolonged edema and ecchymosis (majority resolves between 1 to 2 weeks)

Clinical Significance

Lip augmentation with an alloplastic lip implant represents a quick, safe, cost-effective, and low-risk option for patients looking to augment and/or rejuvenate hypoplastic lips. Aesthetic outcomes are excellent in the hands of a knowledgeable and experienced surgeon, results are long-lasting, and patient satisfaction is high.

Enhancing Healthcare Team Outcomes

It remains imperative to identify the risk factors and perform a thorough assessment of the patient before performing a limp implant. A team approach is an ideal way to limit the complications of this procedure. Before surgery, the patient should have the following done:

  • Evaluation by a surgeon experienced in selecting the appropriate patient for the surgery
  • Evaluation by the primary care physician and anesthesiologist to ensure that the patient is fit for anesthesia

Following surgery, the patient should be evaluated  and monitored by perioperative nursing specialist providing support and patient education as well as coordination of follow up care

An interdisciplinary team of an experienced surgeon, anesthesiologist, and surgical assistants and operative nurses should perform the lip implant for the best outcomes. Close follow-up during the initial post-operative period, either by a wound care nurse and/or clinician experienced in the post-operative care of lip implants should monitor the patient for possible complications, including bleeding or infection. It is also crucial the team works together to counsel the patient on avoiding strenuous activity, heavy lifting, or bending over during the first several days post-operatively to prevent such complications. Patients should also avoid aggressive manipulation of the perioral region until 7 to 14 days postoperatively. [Level V]

Coordinated interprofessional team care involving physicians, specialists, and specialty-trained nurses is essential to achieving positive results in lip implant procedures. [Level V]

Nursing Actions and Interventions

Recovery after lip implantation is relatively quick and easy. Adequate pain medication is appropriate, as patients often report mild peri-oral pain for 1 to 2 days postoperatively. To minimize edema and ecchymosis, the patient should place ice packs around the mouth/lips intermittently for the first 24 to 72 hours, sleep with the head elevated for one week,  and avoid vigorous activity for two weeks. A low dose of corticosteroid taper may help lessen bruising and swelling as well. Patients should be instructed to avoid aggressive manipulation of the perioral region for 7 to 14 days to mitigate migration/extrusion of the implant and to decrease inflammation. Patients are asked to return at 1 and 2 weeks for wound assessment and residual suture removal, respectively.  Some authors advocate that "oral exercises" (e.g., wide mouth opening, smiling, puckering lips) done daily from 3 weeks to 3 months post-operatively will help with overall healing and to create a more natural look and feel to the implant. The majority of bruising and swelling should resolve by two weeks, though photographic documentation should potentially wait until around three months postoperatively for cases of residual bruising and swelling.

Nursing Monitoring

Close follow-up during the initial post-operative period, either by a wound care nurse and/or clinician experienced in the post-operative care of lip implants, should monitor the patient for possible complications including bleeding, bruising, or infection. The nurses should work with the surgeon and an open line of communication should be present. The nurses should assist with patient education, monitoring, and followup care. [Level 5]


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Lip Implants - Questions

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A 35-year-old female presents the clinic to discuss lip augmentation. She requests fuller, more youthful appearing lips. Though she is not concerned regarding the longevity of the procedure (i.e., she is amenable to future repeat procedures), she does wish to have an augmentation with relatively predictable results. On physical exam, she has very thin upper lips which exhibit very little vermilion show. What is her best procedure for this patient?



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A 35-year-old female is undergoing a lip implantation under local anesthesia. Several minutes after completing regional nerve blocks, the patient reports she still can feel the needle near her right philtrum. Which regional block is most appropriate to be performed again?



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A 51-year-old woman presents with complaints of thinning of her lips. She would like long-term options for rejuvenation of her lips. If silicone lip implants are considered, which of the following will be the most common complication encountered?



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A patient presents six months postoperatively following lip augmentation with the use of a silicone implant. They complain that one side of the lip looks much fuller than the other. What error was made when performing the lip implantation?



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A 63-year-old female presents to the clinic with complaints of aging lips. She would like a more youthful, fuller lip. She reports that she would like to restore her lips from thirty years ago. What best describes the effects of aging on the lips?



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Lip Implants - References

References

Winslow C, Surgical and Nonsurgical Perioral/Lip Rejuvenation: Beyond Volume Restoration. Clinics in plastic surgery. 2018 Oct;     [PubMed]
Guida S,Mandel VD,Farnetani F,Manola CM,Rubino G,Ruzzu S,Pellacani G,Longo C,Urtis GG, Permanent implants for lip augmentation: Results from a retrospective study and presentation of tips and tricks. Journal of plastic, reconstructive     [PubMed]
Hoffmann C,Schuller-Petrovic S,Soyer HP,Kerl H, Adverse reactions after cosmetic lip augmentation with permanent biologically inert implant materials. Journal of the American Academy of Dermatology. 1999 Jan;     [PubMed]
Raphael P,Harris R,Harris SW, Five-year Experience with Perma Facial Implant. Plastic and reconstructive surgery. Global open. 2014 May;     [PubMed]
DeJoseph LM,Agarwal A,Greco TM, Lip Augmentation. Facial plastic surgery clinics of North America. 2018 May;     [PubMed]
Richardson MA,Rousso DE,Replogle WH, Long-term Analysis of Lip Augmentation With Superficial Musculoaponeurotic System (SMAS) Tissue Transfer Following Biplanar Extended SMAS Rhytidectomy. JAMA facial plastic surgery. 2017 Jan 1;     [PubMed]
Recupero WD,McCollough EG, Comparison of lip enhancement using autologous superficial musculoaponeurotic system tissue and postauricular fascia in conjunction with lip advancement. Archives of facial plastic surgery. 2010 Sep-Oct;     [PubMed]
Baumann D,Robb G, Lip reconstruction. Seminars in plastic surgery. 2008 Nov;     [PubMed]
Penna V,Stark GB,Voigt M,Mehlhorn A,Iblher N, Classification of the Aging Lips: A Foundation for an Integrated Approach to Perioral Rejuvenation. Aesthetic plastic surgery. 2015 Feb;     [PubMed]
Eremia S,Newman N, Long-term follow-up after autologous fat grafting: analysis of results from 116 patients followed at least 12 months after receiving the last of a minimum of two treatments. Dermatologic surgery : official publication for American Society for Dermatologic Surgery [et al.]. 2000 Dec;     [PubMed]
Popenko NA,Tripathi PB,Devcic Z,Karimi K,Osann K,Wong BJF, A Quantitative Approach to Determining the Ideal Female Lip Aesthetic and Its Effect on Facial Attractiveness. JAMA facial plastic surgery. 2017 Jul 1     [PubMed]
Kar M,Muluk NB,Bafaqeeh SA,Cingi C, Is it possible to define the ideal lips? Acta otorhinolaryngologica Italica : organo ufficiale della Societa italiana di otorinolaringologia e chirurgia cervico-facciale. 2018 Feb     [PubMed]
Ali MJ,Ende K,Maas CS, Perioral rejuvenation and lip augmentation. Facial plastic surgery clinics of North America. 2007 Nov     [PubMed]
Narsete T,Ersek R,Narsete MP, Further experience with permafacial implants for lip augmentation: a review of 100 implants. Aesthetic surgery journal. 2011 Jul     [PubMed]

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