Open Access
CC BY 4.0 · Revista Brasileira de Cirurgia Plástica (RBCP) – Brazilian Journal of Plastic Surgery 2024; 39(04): s00441801343
DOI: 10.1055/s-0044-1801343
Artigo de Revisão

The Risks of Polymethyl Methacrylate: An Integrative Review of 587 Complication Reports

Article in several languages: português | English
1   Clínica privada, São Paulo, SP, Brasil
,
2   Curso de Medicina, Escola Bahiana de Medicina e Saúde Pública, Salvador, BA, Brasil
,
3   Curso de Medicina, Universidade Salvador, Salvador, BA, Brasil
,
4   Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil
,
2   Curso de Medicina, Escola Bahiana de Medicina e Saúde Pública, Salvador, BA, Brasil
,
1   Clínica privada, São Paulo, SP, Brasil
› Author Affiliations


Financial Support The authors declare that they did not receive financial support from agencies in the public, private or non-profit sectors to conduct the present study. Ensaios Clínicos Não. | Clinical Trials None.
 

Abstract

Introduction The demand for minimally-invasive esthetic procedures has boosted the use of polymethyl methacrylate (PMMA) as a dermal filler, which was initially approved for human immunodeficiency virus (HIV)-related lipodystrophies. Improper PMMA use can lead to severe complications, including inflammation, material migration, infections, and systemic repercussions. The present review investigated PMMA-related risks and complications reported in the literature over the past 20 years.

Materials and Methods We conducted an integrative review of descriptive studies on PMMA complications published from 2004 to 2024 and retrieved from PubMed, Scientific Electronic Library Online (SciELO), and Scopus. We analyzed 38 studies, encompassing 587 cases, and excluded articles published outside the specified period and those not meeting the inclusion criteria.

Results We identified 587 cases of PMMA-related complications, 64% of them occurring in Brazil. The most common complication site was the malar region, followed by the nasolabial fold, the gluteal area, and the lips. The complications ranged from immediate to delayed, and from mild to severe. The most frequent complications included erythema (26%), pruritus (16%), edema (11%), granulomas (21%), nodules (14%), and skin changes (8%). Severe cases included renal failure, hypercalcemia, septic shock, infections, and tissue necrosis. The volume injected ranged from 1.9 to 900 mL. The treatment predominantly involved steroids, antibiotics, and surgical interventions, including excisions, abscess drainage, and debridement.

Conclusion The use of PMMA fillers may lead to severe complications, often unrelated to the correction of HIV-related lipodystrophies; PMMA presents significant risks, including systemic complications, requiring surgical removal.


Introduction

The demand for minimally-invasive aesthetic procedures promising efficient, satisfactory results and a short recovery time has increased in recent years.[1] Cosmetic procedures, such as dermal fillers and facial and body volumizers, have emerged as popular alternatives to conventional plastic surgery, promising quick recovery and giving the false idea of fewer risks, meeting patients' expectations.[2]

In this context, polymethyl methacrylate (PMMA) is a widely used filler. It is a non-absorbable plastic component in spheres inserted into a vehicle to enable injectable application.[3] The initial approval of PMMA for outpatient use in Brazil occurred in 2009 by the Ministry of Health for the treatment of lipodystrophies secondary to the adverse effects of antiretrovirals for HIV treatment.[4] [5] However, over the years, the indiscriminate and inappropriate use of PMMA has resulted in numerous immediate and delayed complications.[3]

Immediate PMMA complications include inflammatory reactions, pain, and infections shortly after the application. Such complications can range from minor adverse reactions, such as erythema and edema, to serious adverse effects, including tissue necrosis, ocular involvement, severe infections, and renal failure due to hypercalcemia.[5] [6] [7] Acute complications can persist and evolve into granulomatous formations, recurrent infections, autoimmune diseases, and chronic renal failure. In addition, material migration to undesirable areas can result in local asymmetries and deformities many years after PMMA application.[8]

As a non-absorbable material, the interaction of PMMA with the adjacent tissue hinders its isolated removal. The irreversible nature of PMMA application is a major limitation.[3] [5] [8] In the face of complications such as granulomas, chronic inflammatory reactions, fibrosis, and infections with bacterial biofilm formation, the only therapeutic alternative is surgical removal of the PMMA together with the adjacent healthy tissue, resulting in permanent sequelae.[5] [8]

Inappropriate application techniques, questionable indications, inadequate PMMA volumes for the target treatment area, and poor selection of the quality of the materials can intensify these reactions. Studies[6] show that qualified plastic surgeons or dermatologists who understand the anatomy of the area to be treated, master the correct technique, and know how to treat potential complications should perform the procedure; however, these recommendations are often not considered.

As such, a broad investigation in the medical literature is required to compile the available scientific evidence on PMMA, determine the potential immediate and delayed complications resulting from its use, increase the understanding of PMMA safety for esthetic purposes, and question the approval of its use by the competent bodies.


Objective

In the present study, we conducted an integrative review of immediate and delayed complications resulting from PMMA reported in the literature over the last 20 years.


Materials and Methods

The present is an integrative review of the literature covering case reports and case series on immediate and delayed PMMA-related complications. We searched for articles published from 2004 to 2024 in the PubMed, Scientific Electronic Library Online (SciELO), and Scopus databases using the descriptors polymethyl methacrylate, dermal fillers, and complications.

We excluded from the review studies published outside the stipulated period, experimental studies, and studies not conducted in humans. Two independent reviewers fully read the studies meeting the inclusion criteria and, in case of conflict, a third researcher solved the discrepancy.

We extracted the following data from the articles: journal's name, author, year, country of origin, type of study (case report or case series), casuistry, age, professional performing the procedure (physician or non-physician), injected volume, anatomical site treated, post-PMMA injection signs and symptoms, immediate complications, delayed complications, complication treatment, and whether the filler treated HIV-related lipodystrophy or was used for esthetic purposes.


Results

Overall, 38 studies met the inclusion criteria for this review, totaling 587 cases ([Fig. 1]): 17 articles were case series and 21 were individual case reports ([Table 1]);[9-43] 39% of the articles (15/38) reported cases occurring in Brazil; the oldest publication5 dates from 2008 and the most recent one,9 from 2024 ([Table 2]).

Zoom
Fig. 1 Screening of the articles included in the review.
Table 1

Journal

Author

Year

Casuistry

Reference

Revista Brasileira de Cirurgia Plástica

Goldman et al.

2024

209

[9]

Annals of Plastic Surgery

Durkin et al.

2023

3

[10]

Journal of the American Academy of Dermatology

Vengalil et al.

2023

1

[11]

Cytopathology

Saoud et al.

2023

1

[12]

Ophthalmic Plastic and Reconstructive Surgery

Parikh et al.

2023

1

[13]

Journal of Cutaneous and Aesthetic Surgery

Sivam et al.

2023

1

[14]

Journal of Drugs in Dermatology

Goldman et al.

2021

27

[15]

SKIN The Journal of Cutaneous Medicine

Dhaliwal et al.

2021

1

[16]

European Review for Medical and Pharmacological Sciences

Freire de Carvalho et al.

2021

1

[17]

Annals of Medicine and Surgery

Alimoradi et al.

2021

1

[18]

Brazilian Journal of Nephrology

Manfro et al.

2021

2

[7]

Revista Brasileira de Cirurgia Plástica

Kurimori et al.

2019

1

[3]

Dermatologic Therapy

Goldman and Wollina

2019

2

[19]

Dermatologic Surgery

Ibrahim and Dover

2018

1

[20]

Georgian Medical News

Goldman et al.

2018

2

[21]

Open Access Macedonian Journal of Medical Sciences

Goldman and Wollina

2018

81

[22]

Contact Dermatitis

Shah et al.

2017

1

[23]

Revista Brasileira de Cirurgia Plástica

Souza et al.

2016

1

[24]

Diagnostic Pathology

Cannata-Ortiz et al.

2016

1

[25]

Aesthetic Surgery Journal

Limongi et al.

2016

11

[26]

Plastic Reconstructive Surgery – Global Open

Purnell et al.

2016

1

[27]

Journal of Cosmetic & Laser Therapy

Friedmann et al.

2016

4

[28]

Medicina Intensiva

Boattini et al.

2015

1

[29]

Calcified Tissue International

Hindi et al.

2015

1

[30]

Skin Research and Technology

Cinotti et al.

2015

1

[31]

Archives of Endocrinology and Metabolism

Rados and Furlanetto

2015

1

[32]

Clinical Cases in Mineral and Bone Metabolism

Negri et al.

2014

4

[33]

Journal of the American Geriatrics Society

Costa et al.

2014

1

[34]

Aesthetic Plastic Surgery

Park et al.

2012

13

[35]

Journal of Plastic, Reconstructive & Aesthetic Surgery

Park et al.

2012

15

[36]

The Canadian Journal of Plastic Surgery

Solomon et al.

2012

153

[37]

Journal of Hand Surgery

Al-Qattan

2011

3

[38]

Journal of Plastic, Reconstructive & Aesthetic Surgery

Santana et al.

2010

1

[39]

Aesthetic Plastic Surgery

de Figueiredo et al.

2010

1

[40]

Kosmetische Medizin

Wollina

2009

1

[41]

Plastic and Reconstructive Surgery

Salles et al.

2008

32

[5]

Dermatology

Wolfram et al.

2006

4

[42]

Clinical and Experimental Dermatology

Sidwell et al.

2006

1

[43]

Total

587

Table 2

Author

Year

Number of cases

Reference

Goldman et al.

2024

209

[9]

Goldman et al.

2021

27

[15]

Freire de Carvalho

2021

1

[17]

Manfro et al.

2021

2

[7]

Kurimori et al.

2019

1

[3]

Goldman and Wollina

2019

2

[19]

Goldman et al.

2018

2

[21]

Goldman and Wollina

2018

81

[22]

Souza et al.

2016

1

[24]

Limongi et al.

2016

11

[26]

Rados and Furlanetto

2015

1

[32]

Costa et al.

2014

1

[34]

Santana et al.

2010

1

[39]

de Figueiredo et al.

2010

1

[40]

Salles et al.

2008

32

[5]

Total

373

Anatomical Regions and Injected Volume

The most frequent filler administration site was the malar region, followed by the nasolabial fold, the gluteal region, the lips, the nasal region, the frontal region, the face, the eyelid region, the zygomatic region, the upper limbs, the chin, the jaw, the chest, the trunk, the lower limbs, the and temporal, auricular, and penile regions ([Table 3]). Only 2 (5%) studies reported using fillers to reconstruct antiretroviral-related lipodystrophy.[30] [33] Most studies (89.4%) did not report the volume injected during the procedure; however, quantities ranged from 1.9 mL for the eyelid region in one patient,[10] 4 mL for facial treatment,[17] and 2 cases of gluteal filling injecting 400 mL and 900 mL of PMMA.[3] [27]

Table 3

Anatomical region

Number of studies (percentage)

Reference

Malar

12 (0.13)

[5] [9] [11] [13] [14] [19] [20] [28] [35] [39] [42] [43]

Nasolabial fold

11 (0.12)

[9] [20] [24] [28] [31] [35] [37] [39] [40] [41] [42]

Gluteus

10 (0.11)

[3] [5] [7] [18] [21] [27] [29] [30] [32] [33]

Nose

8 (0.09)

[5] [9] [15] [19] [23] [28] [37] [40]

Frontal

8 (0.09)

[5] [9] [11] [12] [28] [35] [37] [42]

Lip

7 (0.08)

[9] [13] [19] [28] [35] [37] [42]

Face (undetermined specific location)

7 (0.08)

[16] [19] [22] [26] [35] [39] [43]

Ocular

4 (0.04)

[9] [10] [35] [42]

Zygomatic

4 (0.04)

[9] [17] [42] [43]

Upper limbs

4 (0.04)

[7] [19] [21] [38]

Mentum

4 (0.04)

[9] [13] [28] [42]

Mandibular

2 (0.02)

[9] [19]

Trunk

2 (0.02)

[5] [22]

Lower limbs

2 (0.02)

[25] [33]

Thorax

1 (0.01)

[21]

Temporal

1 (0.01)

[9]

Auricular

1 (0.01)

[9]

Penis

1 (0.01)

[5]


Professional Performing the Procedure

In total, 6 out of 38 studies reported the professionals performing the procedure. In 27 cases, physicians performed the procedure, including 16 certified plastic surgeons, 9 dermatologists, and 2 urologists. Six filler procedures were performed by non-physicians, including nurses, estheticians, and dentists.[3] [5] [11] [13] [28] [31]


Complications

The reported complications were divided into immediate (up to 30 days after PMMA injection) and delayed (after 30 days). Ten different immediate complications occurred; erythema was the most frequent (26%), followed by pruritus (16%), edema (11%), acute renal failure (11%), nodules (11%), and other less frequent conditions ([Table 4]).

Table 4

Immediate

Type

Number of studies (percentage)

Reference

Erythema

5 (0.26)

[13] [23] [37] [38] [42]

Pruritus

3 (0.16)

[23] [37] [40]

Edema

2 (0.11)

[23] [38]

Acute kidney failure

2 (0.11)

[3] [29]

Nodule formation

2 (0.11)

[35] [42]

Septic shock

1 (0.05)

[29]

Hepatic dysfunction

1 (0.05)

[29]

Ecchymosis

1 (0.05)

[37]

Respiratory failure

1 (0.05)

[29]

Seropurulent secretion

1 (0.05)

[40]

Delayed

Type

Number of studies (percentage)

Reference

Granuloma

17 (0.21)

[5] [9] [10] [12] [13] [14] [16] [18] [21] [22] [26] [30] [33] [38] [39] [41] [42]

Nodule formation

11 (0.14)

[9] [11] [19] [24] [26] [28] [31] [34] [35] [37] [43]

Skin abnormalities

6 (0.08)

[25] [26] [27] [28] [38] [42]

Inflammatory signs

5 (0.06)

[5] [9] [32] [36] [38]

Edema

5 (0.06)

[9] [13] [20] [25] [26]

Infection

4 (0.05)

[9] [17] [28] [42]

Necrosis

3 (0.04)

[5] [9] [40]

Facial irregularity

3 (0.04)

[26] [36] [42]

Hypercalcemia

2 (0.03)

[18] [33]

Ocular involvement

2 (0.03)

[13] [17]

Chronic kidney failure

2 (0.03)

[7] [21]

Reduced renal function

1 (0.01)

[33]

Neovascularization

1 (0.01)

[9]

Pigmentation

1 (0.01)

[9]

Lacrimation

1 (0.01)

[9]

Fistula

1 (0.01)

[9]

Allergic reaction

1 (0.01)

[13]

Psoriasis

1 (0.01)

[17]

Nephrocalcinosis

1 (0.01)

[18]

Pulmonary granulomatous lymphadenitis

1 (0.01)

[18]

Pericarditis

1 (0.01)

[21]

Sarcoidosis-like syndrome

1 (0.01)

[21]

Erythema

1 (0.01)

[26]

Tachycardia

1 (0.01)

[27]

Hyperkalemia

1 (0.01)

[32]

Nephritis

1 (0.01)

[33]

Pruritus

1 (0.01)

[33]

Hypertension

1 (0.01)

[33]

Rigidity

1 (0.01)

[36]

Seroma

1 (0.01)

[38]

Pulmonary sarcoidosis

1 (0.01)

[43]

Thirty different delayed complications were reported. The most common delayed complication was granuloma (21%), followed by nonspecific nodules (14%), skin abnormalities (8%), inflammatory reactions (6%), edema (6%), infection (5%), necrosis (4%), facial irregularities (4%), hypercalcemia (3%), ocular involvement (3%), and chronic renal failure (3%), among others ([Table 4]).


Treatment

The three most frequent treatments included steroids,[3] [7] [9] [10] [11] [13] [14] [17] [18] [21] [24] [26] [27] [28] [30] [32] [33] [35] [36] [38] [39] [41] [42] [43] antibiotics[3] [11] [20] [25] [29] [40] [42] [43] and surgeries,[3] [7] [9] [10] [12] [13] [17] [23] [24] [26] [27] [28] [35] [36] [38] [39] [40] [42] including 75 cases of excision. Other reported therapeutic approaches included laser,[9] [15] [19] [21] [22] fluorouracil,[9] [14] [28] ozone,[9] xylitol,[9] allopurinol,[9] methotrexate,[17] vitamin D,[17] hydroxychloroquine,[17] colchicine,[21] hemodyalisis,[7] [29] vasopressor support,[29] orotracheal intubation with ventilatory support,[29] calcitonin,[32] [33] saline infusion,[32] bisphosphonates,[30] [32] [33] cyclophosphamide,[33] ketoconazole,[33] and hyaluronic acid,[36] [41] selected according to each case.



Discussion

Some literature reviews[5] highlight the large number of complications resulting from PMMA fillers. In the present study, we updated the evidence regarding the number of complication reports resulting from PMMA use in the last 20 years. We identified a significant prevalence of cases occurring in Brazil, representing more than 50% of the total articles in the current review. Regulatory factors related to the history of Brazilian public health policy in the treatment of HIV/AIDS patients may explain these findings.

In 1996, the emergence of highly-active antiretroviral treatment improved the health condition of HIV/AIDS patients but also resulted in stigmatizing anatomical changes.[44] To address this issue, the Brazilian National Health Regulatory Agency (Agência Nacional de Vigilância Sanitária, ANVISA, in Portuguese) authorized the use of PMMA fillers for reparative purposes in this population.[45]

The evolution of antiretroviral drugs decreased the number of patients with stigmatizing lipodystrophies. However, it is intriguing to note that the number of complications related to the esthetic use of PMMA has increased. In the current review, only two cases of complications resulted from PMMA use for reparative purposes in the treatment of HIV/AIDS patients.[30] [33]

Our findings show that the current use of PMMA exceeds its established safe limits and formal indications determined by regulatory agencies. For instance, we detected case reports of gluteal fillers with volumes of up to 900 mL of PMMA,[3] while the Brazilian consensual recommendation published by Souza et al.[46] in 2017 is not to exceed the maximum volume of 100 mL in this region.

As such, it is important to highlight some points regarding the authorization of PMMA use for esthetic purposes. The lack of appropriate supervision results in inappropriate practices in PMMA use, such as procedures performed by non-medical professionals or untrained physicians, and in sites with inadequate infrastructure.[3] [5] [11] [13] [28] [31] Most articles, except for 6, did not identify the filler prescriber. Out of 34 cases, only 16 were performed by professionals certified for PMMA application, potentially increasing the procedural risk.[5]

From 2004 to 2024, the number of PMMA-related complications in Brazil was significantly higher compared with the rest of the world, totaling 373 cases. Although PMMA use for esthetic purposes has been questioned by the Brazilian Society of Plastic Surgery (Sociedade Brasileira de Cirurgia Plástica, SBCP, in Portuguese)[47] this material remains widely employed as a filler in Brazil. In contrast, other countries often use different reversible and absorbable fillers, such as hyaluronic acid, autologous fat grafts, poly-L-lactic acid, and collagen biostimulators.[48]

The reports included more cases of delayed complications compared with immediate complications. The most frequent delayed complication was granulomatous formations (21%). It is worth noting the potential severity of the complications related to PMMA fillers, such as septic shock and chronic renal failure.[7] [21] [29] In addition, the long-term safety of PMMA is uncertain, since there are reports[12] of foreign body granulomas in regions distant from the PMMA injection site. Therefore, to potentially reduce the incidence of adverse effects, stricter monitoring of the distribution, sale, prescription, and procedural sites is required, in addition to raising public awareness of PMMA-related risks.[6]

In Brazil, ANVISA authorizes PMMA application in two situations: correction of lipodystrophy resulting from antiretroviral medications and volumetric correction of the face and body. Although there is no contraindication to PMMA use in the buttocks, it should not occur for volume increase. Only properly-qualified physicians must perform the application and decide, based on a detailed evaluation, the dosage and number of injections appropriate for each patient, considering the particularities and needs of the subject.[49]

It is worth noting that ANVISA classifies PMMA as an implantable medical product of risk class IV. This classification presupposes a high level of regulatory control due to the potential risks of complications, such as inflammatory reactions, infections, material migration, and tissue necrosis, especially because PMMA is a permanent material that is not resorbable by the body, highlighting the irreversibility of this filling method.[49]

Safer alternatives to PMMA include hyaluronic acid and autologous fat. Hyaluronic acid presents greater biocompatibility, a lower risk of complications, and the possibility of reversal by applying the enzyme hyaluronidase. Autologous fat is another viable and safe option with a lower complication risk.[50]

The limitations of the current review include the uncertainty as to whether the higher complication incidence in Brazil results from a higher frequency of PMMA procedures or an actual higher incidence of complications. This is a significant limitation, since we do not have absolute data on the total number of procedures performed in Brazil and worldwide. Another limitation is that the review is based only on cases of complications documented in the literature, which may not reflect reality. The number of complications is likely much higher than reported, since complications not published in scientific articles could not be included.


Conclusion

Polymethyl methacrylate fillers are associated with serious immediate and delayed complications. Most complications are not related to their use for the correction of lipodystrophies in patients with HIV/AIDS. Most (64%) complications described in the medical literature over the last 20 years occurred in Brazil. Polymethyl methacrylate is non-absorbable, and multiple invasive surgical procedures may be required to treat the sequelae resulting from its use as a permanent filler. There are alternatives to PMMA that are reversible and present lower risks to the health of patients.



Conflito de Interesses

Os autores não têm conflito de interesses a declarar.

Authors' contributions

MMCS: data analysis and/or interpretation, final manuscript approval, conceptualization, study conception and design, methodology, writing – original draft preparation, writing – review & editing, and supervision; ALC: data analysis and/or interpretation, statistical analysis, study conception and design, methodology, writing – original draft preparation, and writing – review & editing; LHMCV: methodology, writing – original draft preparation, and writing – review & editing; PBSM: data analysis and/or interpretation, writing – original draft preparation, and writing – review & editing; IMAS: statistical analysis, writing – original draft preparation, and writing – review & editing; and MARM: final manuscript approval, project management, writing – review & editing, and supervision.



Endereço para correspondência

Alessandra Lima Costa
Curso de Medicina, Escola Bahiana de Medicina e Saúde Pública
Salvador, BA
Brasil   

Publication History

Received: 14 August 2024

Accepted: 29 September 2024

Article published online:
27 January 2025

© 2025. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution 4.0 International License, permitting copying and reproduction so long as the original work is given appropriate credit (https://creativecommons.org/licenses/by/4.0/)

Thieme Revinter Publicações Ltda.
Rua do Matoso 170, Rio de Janeiro, RJ, CEP 20270-135, Brazil

Bibliographical Record
Marcelo Moura Costa Sampaio, Alessandra Lima Costa, Luiz Henrique Megale Conteville Vianna, Pedro Burlacchini Sanches Marinho, Ionara Maria de Almeida Santos, Mariana Alcantara Rodrigues de Moraes. Os riscos do polimetilmetacrilato: Revisão integrativa de 587 casos de complicações. Revista Brasileira de Cirurgia Plástica (RBCP) – Brazilian Journal of Plastic Surgery 2024; 39: s00441801343.
DOI: 10.1055/s-0044-1801343

Zoom
Fig. 1 Triagem dos artigos incluídos na revisão.
Zoom
Fig. 1 Screening of the articles included in the review.