|Year : 2021 | Volume
| Issue : 2 | Page : 143-148
The use of hyaluronic acid in individuals with cleft lip and palate: Literature review
Kelly Fernanda Molena1, Lidiane de Castro Pinto2, Gisele da Silva Dalben3
1 Multiprofessional Resident in Syndromes and craniofacial anomalies, Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Bauru, Brazil
2 Endodontics Sector, Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Bauru, Brazil
3 Pediatric and Community Dentistry Sector, Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Bauru, Brazil
|Date of Submission||26-Jan-2021|
|Date of Acceptance||13-May-2021|
|Date of Web Publication||7-Jun-2021|
Dr. Kelly Fernanda Molena
Rua Silvio Marchione, 3-20, Vila Nova Cidade universitária, Bauru, São Paulo, 17012-900
Source of Support: None, Conflict of Interest: None
Since the Resolution 198/2019 of Brazilian Dental Council, which regulates orofacial harmonization as a dental specialty, and the advent of various uses of facial fillers, such as hyaluronic acid (HA), it is possible to perform both esthetic and functional corrections in individuals. Individuals with cleft lip and palate (CLP) present lip irregularities even after orofacial rehabilitation with an interdisciplinary team with several corrective surgeries, interfering with the esthetics, which can cause problems in self-esteem and social insertion. Thus, facial filling is an innovation that, together with dentistry, contributes to the individual's esthetics and well-being. Considering the patient safety and health, more research is progressively being conducted to make such procedures less invasive. This work conducted a literature review on the use of HA as a facial filler to correct lip scars in patients with CLP. By a literature and transverse search in Scientific Electronic Library Online and PubMed databases using specific descriptors, the studies that met the inclusion criteria were selected, from 1990 to 2020. It can be concluded that the use of HA as a facial filling material in the correction of lip scars from reparative surgeries related to CLP has been shown to be effective both for correction of facial asymmetry and to improve the quality of life of patients who used the procedure.
Keywords: Cleft lip, dentistry, dermal fillers, esthetics, hyaluronic acid
|How to cite this article:|
Molena KF, Pinto Ld, Dalben Gd. The use of hyaluronic acid in individuals with cleft lip and palate: Literature review. J Cleft Lip Palate Craniofac Anomal 2021;8:143-8
|How to cite this URL:|
Molena KF, Pinto Ld, Dalben Gd. The use of hyaluronic acid in individuals with cleft lip and palate: Literature review. J Cleft Lip Palate Craniofac Anomal [serial online] 2021 [cited 2021 Jun 17];8:143-8. Available from: https://www.jclpca.org/text.asp?2021/8/2/143/317783
| Introduction|| |
The Resolution 198/2019 of Brazilian Dental Council acknowledged Orofacial Harmonization (HOF) as a dental specialty and the use of materials as hyaluronic acid (HA) for both esthetic and functional corrections.
Individuals with cleft lip and palate (CLP) can present lip irregularities even after several corrective surgeries, interfering with the esthetics and causing problems in self-esteem and social integration.,,
Thus, the aim of this study was to conduct a literature review regarding the possibility to use HA as a facial filler to correct the lip scar in individuals with CLP. The study comprised a literature review on the use of HA as a facial filler in the correction of lip scars from repair surgeries related to CLP, obtaining the necessary knowledge regarding the effectiveness of using HA as a facial filling material for these scars.
| Materials and Methods|| |
A bibliographic cross-sectional search was conducted on articles and electronic media from the following databases: Scientific Electronic Library Online, PubMed (National Center for Biotechnology Information), Google Scholar, as well as a manual search in the reference lists of studies that have been included. The PECOS strategy was used [Table 1] and the research included publications from 1990 to April 2021 in English, Spanish, Italian, French, and Portuguese, with the search terms: “hyaluronic acid” and “;cleft lip,” and these terms should be present in the title, abstract, or keywords. The following descriptors were used: dermal fillers, cleft lip, and HA. The MeSH terms were dermal fillers, cleft lip, HA, dentistry, and esthetics. Furthermore, as inclusion criteria, this study included studies with full text available in electronic media and national and international journals. The study excluded theses, thesis chapters, books, book chapters, conference proceedings or reports, technical and scientific reports, and ministerial documents.
|Table 1: Population, exposure, comparator, outcomes, study strategy with inclusion criteria of the study|
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The duplicates were removed manually and the selected articles, according to the inclusion and exclusion criteria, were numbered, saved in PDF and organized in a table considering the data:
- Study authors and year of publication
- Study title
- Clinical protocol
- Conclusion of the research.
| Results|| |
Three studies were found in accordance with the inclusion and exclusion criteria on the use of HA to correct scars from primary CLP surgeries. These articles are listed in the table below [Table 2], according to author, year, and publication title.
|Table 2: Articles selected in the literature review and organized according to author and year, title, clinical protocol, results, and conclusion|
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| Literature Review|| |
CLP is one of the most common craniofacial malformations in mankind, being caused by failure in the union of facial processes in the embryonic period, resulting in a cleft that can extend from the lip to the soft palate, promoting changes in facial morphology, dentition, speech, esthetics, among others. The available findings indicate that CLP affects about 1 in 700 live births. Furthermore, epidemiological and experimental data suggest that it presents a multifactorial origin. Environmental risk factors such as smoking, alcohol, malnutrition, infection, teratogens, and drugs combine with genetic disorders, and the interaction between them is the main causes of malformation.
The treatment of CLP is initiated right after birth and continues until adulthood, requiring the participation of an interdisciplinary team. The morphological rehabilitation of clefts involves lip repair at 3 months of age and palate surgery at around 1 year of age, besides secondary alveolar bone graft performed between 9 and 12 years of age. In addition to primary plastic surgery, rehabilitation requires an interdisciplinary protocol involving different specialties such as speech therapy, maxillofacial surgery, and oral rehabilitation. It is extremely important to standardize the therapeutic procedures, which must be performed by qualified professionals.
The primary surgeries induce the formation of scar tissue in the surgical region, promoting dynamic and static changes that, associated with the cleft, have negative consequences for maxillary growth and development, affecting the entire maxillofacial complex. Over the decades, with advances in surgical techniques, there has been a continuous improvement in the nasolabial appearance of patients with clefts. However, even after several surgical procedures, small deformities, scars, or facial asymmetry may remain, causing a negative impact on facial esthetics, self-esteem, and social inclusion.,,,,,
Thus, several studies report the perception by professionals, laypeople, parents, and patients about the esthetic result of the treatment of CLP. Lauris et al. evaluated the esthetics of the facial profile of children rehabilitated with CLP, comparing the judgment of professionals related and unrelated to the rehabilitation of clefts and laypeople, and the results revealed that professionals related to cleft rehabilitation were kinder and those unrelated to cleft treatment were stricter about facial esthetics than laypeople.
In the studies by Alhayek et al. and the professionals were more satisfied than laypeople, corroborating that there are differences in perception between health professionals and laypeople, and the discrepancies between professional groups can be attributed to different treatment modalities and protocols., According to Papamanou et al. (2012), this can be explained as a result of the education and experience of specialists, which can lead to an assessment of facial esthetics from a different perspective compared to laypeople. From the perspective of parents and patients, low satisfaction with esthetics was correlated with the increase in self-reported influence of the cleft on the social activity and professional life of patients, as well as their high expectations with the results. These findings highlight the observed negative influence of the cleft on the patient's social activity and professional life and underline the need for the highest quality of surgical outcome for this group of patients.,,,,
Meyer-Marcotty (2011) analyzed the facial perception of patients with unilateral cleft compared with Class III orthognathic patients and concluded that there was a greater degree of asymmetry in patients with cleft nose and lower lip, even when surgery was performed on the young patient. Although Class III patients were classified as less attractive compared to controls, patients with clefts were classified as significantly less attractive, showing that not only the extent of this asymmetry influences the attractiveness but also its location.
With this in mind, orofacial fillers as HA are versatile agents for filling the lips and perioral region and can act as adjuvants for esthetic rehabilitation and improvement of quality of life in these patients. It plays several roles in the formation and repair of tissues, collagen synthesis, elasticity, and support of the skin. Since this is a reversible procedure, it is very safe for cosmetic and dental procedures.,
Schweiger et al. reported the use of HA filling for correction of lip asymmetry in an adult patient with unilateral CLP, which presented lip asymmetry resulting from primary lip and palate surgeries. An amount of 0.5 ml of HA was placed on the body and border of the left lip vermilion with excellent cosmetic results and durability of around 4 months.
In 2015, Stolic et al. applied HA in a patient with scarred lip resulting from the primary surgeries of CLP, but in two stages, release of fibrous tissue through an incision and shortly after the insertion of the acid hyaluronic obtaining volume and lip symmetry for this patient.
Kandhari et al. reported the use of HA as an alternative for correcting congenital, acquired, and postsurgical lip asymmetries in three clinical cases, in which there was significant improvement in lip symmetry and also in the lip and perioral profile of these patients.
Franchi et al., besides evaluating the increase in lip volume, also analyzed the effects of HA on the flexibility and elasticity of the scar tissue and were able to verify that, when there was a hardened scar, the first session of injections improved flexibility and elasticity, but it provided a moderate volume since the tissues were not deformable. The second session had an essentially volumizing effect since the tissues were softened and could be more easily expanded. Thus, due to its viscoelastic properties, the application of HA in patients with CLP improved the asymmetry and also the lip flexibility and elasticity.
Accordingly, Hussain et al. and Khan et al. reported in their work that the use of HA improved the appearance of dystrophic scars. Thus, the use of HA to correct lip scar in patients with CLP, based on the current literature, is an option for the esthetic rehabilitation of these patients, in addition to improving their self-esteem and social insertion.,
| Discussion|| |
CLP, being one of the most common craniofacial malformations in mankind, presents esthetic sequels represented by scars or facial asymmetry as a result of treatment with reparative surgeries, causing a negative impact on facial esthetics, self-esteem, and social inclusion.,,,,, Throughout their lives, patients with CLP undergo various surgical and reconstructive procedures and, at the end of these, a scar or lip asymmetry may persist.
Facial fillers are an important innovation in the field of dentistry, because, by this procedure, it is possible to provide support to improve, correct, and prevent the damage to the facial tissues. Among these, HA is one of the best fillers currently used; a member of the family of glycosaminoglycans, it is present in the fundamental intercellular substance of animal tissues and in the capsules of certain bacteria, presenting a high capacity to bind to water, making it an interesting substance to add volume to the skin. HA as a filling biomaterial has practical applications, good safety margin, besides immediate and lasting esthetic effects. Its biocompatibility and relatively simple application technique have made it a frequent choice for facial volumization, being effective for correcting asymmetries, refining scars and skin flexibility, thus enabling corrections of scars resulting from reparative surgeries, and improving the quality of life of these patients, as a way to achieve the esthetic harmony not achieved by surgeries.,,,
Eventually, mild swelling may occur after application, which usually disappears within 24 h. However, in most cases, the patient is normally able to return to the routine simply by applying cold compresses and taking analgesics and/or anti-inflammatories prescribed by the dentist., In case of exacerbated volumization, as well as in the treatment of nodules, granulomas, or necrosis, it is possible to apply hyaluronidase aiming at resorption of the product. Furthermore, after application, it is recommended to perform a vigorous massage on the spot to homogenize the area, and the professional must have full knowledge of anatomy to avoid applications in blood vessels.,
For individuals with CLP, HA is shown as a less invasive treatment option, since this is a nonsurgical procedure, with quick and easy application and more affordable. Evaluating HA in the correction of lip asymmetry in patients with scars from primary surgeries to correct CLP, it was noted that this material can offer, by a minimally invasive method, considerable esthetic improvement and lip flexibility and elasticity, thus also improving the lip function.,
Other authors have reported its use for correcting scars in other regions, such as the cheek and forearm, with considerable improvement in their appearance., The volume and concentration depend on the application site, and the procedure and time needed for reapplication vary between patients, with an average of 3 months to 1 year, thus it is fundamental to perform individual planning for each patient.,,
Thus, with Resolution 198/2019, which recognizes orofacial HOF as a dental specialty, it appears as a great opportunity in the rehabilitation of individuals with CLP, since a properly qualified dentist can continue the treatment to meet the patient's esthetic expectations and thus provide the integrity of rehabilitation, which also includes the psychological aspects.
| Conclusion|| |
Based on findings of the literature of the past 20 years, the use of HA as a facial filling material in the correction of lip scars from reparative surgeries related to CLP has been shown to be effective both for correction of facial asymmetry and to improve the quality of life of patients submitted to this procedure.
Financial support and sponsorship
Conflicts of interest
There are no conflicts of interest.
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[Table 1], [Table 2]