Atypical swallowing: a review.

AIM: Atypical swallowing is a myofunctional problem consisting of an altered tongue position during the act of swallowing. High incidence in population, multifactorial etiology and the recurring connection with the presence of malocclusions made it a topic of strong interest and discussion in science. The purpose of this review is to illustrate the current orientation on the topic of atypical swallowing, trying in particular to answer two questions: 1) what kind of connection is there between atypical swallowing and malocclusion; 2) what kind of therapy should be used to solve it. METHODS: This review was conducted on the Medline database [www.ncbi.nim.nih.gov/pubmed] searching for the keywords "atypical swallowing" and "tongue thrust". We examined all the documents from the year 1990 onwards, excluding the ones about syndromic cases of the central motor system. RESULTS: The causal relation between the two problems seems to be biunique: some authors affirm that this oral habit starts as a compensation mechanism for a preexisting malocclusion (especially in case of open-bite); other texts show that it has a tendency to exacerbate cases of malocclusion; it is also proven that a non-physiological tongue thrust can negatively influence the progress of an ongoing orthodontic therapy. Thereby, the best therapeutic approach seems to be a multidisciplinary one: beside orthodontics, which is necessary to correct the malocclusion, it is essential to set up a myofunctional rehabilitation procedure to correct the oral habit, therefore granting long time permanent results. There is also proof of a substantial difference between the results obtained from early (deciduous or primary mixed dentition) or later treatments. CONCLUSION: The biunique causal relation between atypical swallowing and malocclusion suggests a multidisciplinary therapeutic approach, orthodontic and myofunctional, to temporarily solve both problems. An early diagnosis and a prompt intervention have a significantly positive influence on the therapy outcome.

Causal relationship between malocclusion and oral muscles dysfunction: a model of approach.

AIM: Bad habits result in altered functions which with time can cause anomalies of the orofacial morphology. To solve these problems, orthodontic treatment can be supported by myofunctional therapy in order to recover the normal functionality of the oral muscles. The aim of this study is to assess the need to treat patients with neuromuscular disorders, from both the occlusion and the muscles condition approach in order to obtain the balance needed for the stability of treatment. MATERIALS AND METHODS: A sample of 23 patients with atypical swallowing was included in this study, some of them presented thumb sucking and oral breathing. After case history collection, in order to make a correct orthodontic and functional diagnosis, correction of anomalies was carried out since they could compromise the success of the therapy (maxillary contraction, oral breathing, and short lingual fraenum). Then a different therapeutic approach was applied on the basis of the specific dental features. RESULTS: Both from the diagnostic and therapeutic point of view, important results were achieved especially through muscle analysis with dynamometer and surface electromyography. CONCLUSION: Orthodontic therapy, in the presence of bad habits, is not enough to solve orthodontic issues, it must be combined with a myofunctional treatment. The success of the therapy is granted only when patients and their family comply with the treatment and all factors which can prevent success of the therapy are removed.

Atypical deglutition: diagnosis and interceptive treatment. A clinical study.

AIM: The aim of this study was to evaluate the early treatment of atypical deglutition, by analysing the efficacy of the eruptive guide appliance Habit Corrector™. MATERIALS AND METHODS: The pre- and post-treatment (T1 and T2) cephalometric data of 2 groups of patients (G1 and G2), both consisting of 25 patients each and treated with Habit Corrector™, were compared. The first group included 10 males and 15 females, aged between 4 and 7 years old, with average age 6.17 years, and therefore undergoing the last phase of primary dentition and the first phase of mixed dentition. The second group included 12 males and 13 females, aged between 8 and 12 years old, with average age 9.19 years old, undergoing the second phase of mixed dentition. The overall duration of the treatment was 12 months. RESULTS: The results showed significant differences between the two groups, with respect to overbite, overjet, molar relation, inclination of the upper and lower incisors, position of the jaw. A significant variation between the two groups at T2 was registered for the maxillomandibular relationships: the increase in the growth and degree of mandibular protrusion was of 4.66° in G1 and 2.44° in G2. Significant changes were registered for the position or growth of the upper jaw; the upper facial height almost remained unaltered, with 53.34° for G1 and with 53.96° for G2. A significant variation occurred with the increase in the sagittal relationship between the molars, improved in G1 by 3.14 mm and in G2 by 2.61 mm. A significant decrease of overjet was registered in G1 by 1.94 mm and in G2 by 0.76 m and an increase of overbite in G1 by 3.14 mm and in G2 by 0.88 mm. The inclination of the maxillary and mandibular incisors improved, with an inter-incisive angle of 123° in G1 and 124.2° in G2. CONCLUSION: The clinical results obtained suggest that early intervention in atypical deglutition with Habit Corrector™ is able to produce significant results in primary dentition and in the first phase of mixed dentition, rather than in the late phase of mixed dentition.

Patients treated with orthodontic-myofunctional therapeutic protocol.

AIM: The aim of this study is to report three cases that needed myofunctional and orthodontic treatment and the good results achieved after the therapy. Orthodontic treatment alone, in presence of bad habits, is not enough to solve the orthodontic issues, so it needs to be combined with myofunctional treatment.

[Tongue retraining and occlusal stability in a young adult. Case report]. / La rééducation linguale et la stabilité occlusale chez le jeune adulte. A propos d'un cas clinique.

The clinical observation describes the case of a 20-year-old woman who has consulted for aesthetic and functional reasons. She presents a skeletal class III normodivergent, an occlusal class III with a lower proalveoli quite marked. In addition, a lingual dysfunction which manifests itself by important anterior diastema and dento-dental disharmony at the upper jaw complicates the case. The undertaken therapeutic project starts with a first step of a lingual praxis rehabilitation, followed by an orthodontic step and upper lateral incisors-plasty. The purpose of those results is the evaluation of the stability two years later, which was reported positive.

Myths that persist about orofacial myology.

This article addresses many myths that have persisted over the years in dentistry and orofacial myology regarding the nature of orofacial myofunctional disorders (OMD's). Myths include 1) the concept that the term "tongue thrusting" includes the rest posture; 2) that there is an excessive amount of pressure exerted against the anterior teeth in swallows, that swallowing pressures add up, and the frequency of swallowing has an impact on the dentition; 3) the idea that the tongue is the strongest muscle in the body; 4) the view that a muscle will be the winner in any tug of war between muscle and bone; 5) the claim that a tongue thrust can cause an open bite malocclusion; 6) the claim that a tongue thrust can cause a Class II malocclusion; 7) the claim that the tongue molds the palatal vault; 8) the notion that a low tongue tip posture at rest presents a problem; and 9) the claim that OMD's represent a muscle imbalance that can be brought into balance with therapy. Each of these false claims or "myths" is discussed and corrected, with the positive acknowledgement that clinicians are abandoning the incorrect notion of muscle balance and imbalance as had been claimed previously.

Deglución atípica y succión de dedos / Atypical swallowing and sucking toes

La deglución atípica corresponde a movimientos inadecuados de la lengua y/o otras estructuras que participan en el acto de deglutir. En general estas atipias ocurren por problemas de postura inadecuada de la cabeza, por alteraciones de torus, de la movilidad o la propiocepción de los órganos: lengua, labio mejilla y paladar blando. La deglución debe ser realizada con posición labial y lingual adecuada para no intervenir en el desarrollo óseo, en la dentición y en la oclusión. La succión digital se ha descrito como un hábito común en la infancia que se considera normal hasta la edad de los 3 a 4 años. Aunque la mayoría de los niños que comienzan a chuparse el pulgar interrumpen esta costumbre hacia los 2,5 a 3 años, en algunos casos este hábito permanece hasta edades entre los 6 y 12 años. Los riesgos asociados a la succión del pulgar dependen de la frecuencia, intensidad, duración y posición de la boca. La presencia de este hábito después de los 4años genera cambios en la tonicidad muscular de labio y bucinadores, retarda su maduración, dificulta la deglución normal y crea mecanismos nocivos que llevan a desarrollar una actividad muscular de compensación para lograr la deglución, todo lo cual también puede afectar otras acciones como la fonación y la respiración entre otras. Se parte de una breve exposición de la deglución normal y se analiza la atipia más frecuente, tipos y tratamientos de ambos hábitos. Se realizó una revisión exhaustiva de la literatura científica con los objetivos de describir las fases del mecanismo de la deglución normal, diferenciar la deglución infantil de la adulta, explicar los diferentes tipos de deglución, con el propósito de ofrecer una síntesis actualizada a la comunidad científica..

The tongue: deglutition, orofacial functions and craniofacial growth.

So-called "primary" or "infantile" forms of deglutition, also termed lingual dyspraxia, are treated in different ways by orthodontists using various appliances to correct the condition and are also managed by speech-therapists and physiotherapists. The results obtained are often unstable. We have developed a more holistic approach to this disorder by attempting to grasp the underlying mechanisms in order to achieve more satisfactory correction. By establishing normal salivary deglutition more rapidly, this manual osteopathic technique complements the methods which use voluntary rehabilitation to impress upon the body's physical reflexes the "motor image" of the act to be accomplished. In order to render this article more lively and accessible, we have chosen to let the tongue speak in the first person--which, after all, is only normal!

Long-term outcome in a patient with a dentoskeletal open-bite malocclusion treated without extraction.

This case report describes the treatment of a patient with a Class II malocclusion with an anterior open bite. The patient, a girl 16 years of age, had a significant anteroposterior discrepancy and a high-angle tendency. Her face was convex, with competent lips. Intraorally she had an anterior open bite of 3 mm, space in the mandibular arch, and an overjet of 2 mm. High-pull headgear, anterior intermaxillary elastics, and appropriate wire bending were used to close the bite and to correct the anteroposterior dental relationship. Modification of a tongue thrust habit helped to correct this significant malocclusion and provided stability at 11 years posttreatment.

[Tongue disfunction and abnormal development]. / Dysfonctions linguales et dysmorphies.

Almost all the disorders seen in the mixed and adult dentitions were already present in the temporary dentition. We should ask ourselves what postural and dynamic role the tongue plays in defective development of the dental arches.

Remoção de hábitos e terapia miofuncional: restabelecimento da deglutição e repouso lingual / Removal of sucking habits and myofunctional therapy: establishing swallowing and tongue rest position

TEMA: hábitos prolongados de sucção de chupeta e mamadeira podem provocar distúrbios miofuncionais como o padrão incorreto de deglutição e repouso lingual. OBJETIVO: estudar os efeitos da associação da Terapia Miofuncional (TMF) e da remoção de hábitos (REM) de sucção na reabilitação da deglutição e repouso lingual. MÉTODO: dois grupos composto por dez crianças de quatro anos a quatro anos e oito meses de idade que inicialmente apresentavam hábitos de sucção de chupeta e mamadeira foram estudados. O grupo denominado REM foi submetido à REM pelo Método de Esclarecimento modificado, enquanto que o grupo denominado TMF também teve os hábitos de sucção removidos pelo mesmo método e foi associada a TMF. Foram realizados exames pré-tratamento, 60 e 180 dias pós-procedimentos. Os dados foram submetidos aos testes estatísticos de Mann-Whitney e Wilcoxon p < 0,05. RESULTADOS: os resultados evidenciaram que o grupo submetido à REM e TMF apresentou adequação dos padrões de deglutição aos 60 dias e 180 dias e correto posicionamento de língua em repouso aos 180 dias, enquanto que o grupo submetido apenas à REM demonstrou adequação do padrão de deglutição apenas aos 180 dias e não apresentou melhora significativa do correto padrão de posicionamento de língua em repouso durante os períodos de avaliação. CONCLUSAO: a TMF associada à REM de sucção de chupeta e mamadeira produziu melhor e mais rápida adequação do padrão de deglutição e de posicionamento lingual em repouso do que apenas a REM de sucção.

Birth delivery trauma and malocclusion.

The aim of the investigation was to determine the dynamic of birth delivery and relate to dental occlusion among a group of adult subjects. The group studied was made up of 106 subjects (57 females and 49 males) referred for dental diagnosis and treatment. The average age was 26 with a range 22 to 30 years. In data collection and analysis the following were used as measures: dental occlusion (Angle Class I, II div 1, II div 2 and III) and type of delivery (normal, short, long, caesarean and other). Results showed that among 106 subjects 72 (68%) had malocclusion versus 34 (32%) with normal occlusion; 24 subjects (22.6%) have been normal delivery versus 82 (77.4%) with non-normal delivery. Class I is present in 34 subjects (32%), class II division 1 in 26 (24%), class II division 2 in 22. (20%), class III in 16 (14%), and 8 subjects (6%) fall in the section "other". Among 24 subjects with normal delivery 100% presented class I occlusion. However, among 82 subjects with non-normal delivery 10 subjects had a class I (12.2%) and the 72 (87.8%) had in the other classes, are distributed in the various subgroups of non-normal labor/delivery. None of the subjects with a malocclusion have a normal labor/delivery. Better understanding of the connections among osteopathic theory, craniosacral treatment and the outcomes upon dental occlusion, more rigorous evaluations are warranted.

A retrospective and prospective view of orofacial myology.

Orofacial myofunctional disorders include specific conditions or behaviors that can have a negative impact on oral postures and functions. Historically, interest has focused on behaviors in the horizontal plane, highlighted by tongue thrusting. Currently, the scope of practice also includes tongue forward posturing, lip incompetence, open mouth rest posture, thumb and finger sucking, bruxism, and biting habits involving lips, fingers, tongue and cheeks. The common denominator for myofunctional conditions is a change in the inter-dental arch vertical rest posture dimension, the dental freeway space. The purposes of myofunctional therapy include normalizing the freeway space dimension by eliminating noxious habits or postures related to freeway space change. Improving cosmesis with a lips-together rest posture is also an important treatment goal. The clinical significance of the freeway space is explained in terms of the dental consequences of differential eruption patterns that can develop from postural modification of the freeway space. When the freeway space is opened for extended periods beyond the normal range, the tongue can act as a functional appliance and contribute to the development of anterior open bite or a Class II malocclusion. A clinical procedure is proposed for evaluating the freeway space dimension and incorporating the information into treatment planning and evaluation of treatment success. While dentistry/orthodontics has a primary focus on dental occlusion, or teeth-together relationships, orofacial myologists focus on teeth-apart behaviors and postures that can lead to, or have already resulted in malocclusion.

[Removal of sucking habits and myofunctional therapy: establishing swallowing and tongue rest position]. / Remoção de hábitos e terapia miofuncional: restabeleciimento da deglutição e repouso lingual.

BACKGROUND: The prolonged habit of pacifier sucking and the prolonged use of feeding bottle may cause myofunctional disorder, such as incorrect swallowing pattern and inadequate tongue rest position. AIM: To study the effect of myofunctional therapy (MFT) associated with the removal of the habit of pacifier sucking and the use of feeding bottle (REM) on the rehabilitation of swallowing and tongue rest position. METHOD: Two groups with ten children, ages ranging from four to four years and eight months, who initially presented a pacifier sucking habit and used the feeding bottle were studied. Children on REM group underwent the process of sucking habits removal using the Modified-Counselling Method, whereas children on MFT group underwent the same procedure associated to myofunctional therapy. Pre-treatment assessments were made, as well as 60 and 180 days post-treatment assessments. Data were analyzed using the statistical tests of Mann-Whitney and Wilcoxon (p < 0.05). RESULTS: Results indicate that children in the MFT group presented adequate swallowing patterns after 60 and 80 days, and presented adequate tongue rest position after 180 days. Children on the REM group, however, presented adequate swallowing pattern only after 180 days and did not present a significant improvement on the tongue rest position during the assessments. CONCLUSION: Myofunctional therapy associated to the removal of sucking habits presented a better and faster improvement of the swallowing pattern and of the tongue rest position.

Nonsurgical and nonextraction treatment of skeletal Class III open bite: its long-term stability.

Two female patients, aged 14 years 5 months and 17 years 3 months with skeletal Class III open bite and temporomandibular dysfunction are presented. They had previously been classified as orthognathic surgical cases, involving first premolar removal. The primary treatment objective was to eliminate those skeletal and neuromuscular factors that were dominant in establishing their malocclusions. These included abnormal behavior of the tongue with short labial and lingual frenula, bilateral imbalance of chewing muscles, a partially blocked nasopharyngeal airway causing extrusion of the molars, with rotation of the mandible and narrowing of the maxillary arch. Resultant occlusal interference caused the mandible to shift to one side, which in turn produced the abnormal occlusal plane and curve of Spee. As a result, the form and function of the joints were adversely affected by the structural and functional asymmetry. These cases were treated by expanding the maxillary arch, which brought the maxilla downward and forward. The mandible moved downward and backward, with a slight increase in anterior facial height. Intruding and uprighting the posterior teeth, combined with a maxillary protraction, reconstructed the occlusal plane. A favorable perioral environment was created with widened tongue space in order to produce an adequate airway. Myofunctional therapy after lingual and labial frenectomy was assisted by vigorous gum chewing during and after treatment, together with a tooth positioner. Normal nasal breathing was achieved.

Electropalatographic and cephalometric assessment of myofunctional therapy in open-bite subjects.

Myofunctional therapy (MFT) is often prescribed to correct tongue-thrust swallowing, with the expectation that anterior open bite (AOB) will reduce spontaneously if a more posterior tongue posture is learned. However, MFT has not been subjected to systematic evaluation. Electropalatography (EPG), which is used in speech pathology to measure dynamic tongue function for diagnostic, therapeutic and research purposes, is a suitable technique for the evaluation of MFT. This prospective clinical study assessed the effect of tongue re-education therapy on tongue function and dento-facial form in AOB patients. Electropalatography recordings of speech and swallowing, and lateral head cephalometric radiographs were obtained from eight 10-year-old boys with tongue-thrust swallowing behavior and AOB before and after a course of tongue re-education therapy. Although differences in cephalometric measurements before and after therapy were small, there was some evidence of a trend for upper and lower incisor eruption, with concomitant reduction of the AOB. Analysis of the EPG speech data was inconclusive, but the swallowing data showed trends for more consistent and more anterior patterns of EPG contact after therapy. Comparison of pre- and post-therapy EPG data with data from a parallel study using a group of age-matched controls indicated that some "normalisation" of swallowing behaviour had occurred. The results of this research imply that the therapy was partially successful in improving tongue function during swallowing and in reducing AOB. Further research on a larger sample over a longer observation period is required for more accurate assessment of soft and hard tissue changes.

Case presentation: resolution of an oral lesion as a result of orofacial myofunctional therapy.

This case presentation examines the etiology, evaluation and treatment of a 57 year-old-female presenting with an area of irritation/chronic lesion on the anterior lingual surface. Orthodontic history and lingual and labial postures are discussed.

Adapted or atypical thrusting?

Distinguishing between the terms "adapted thrusting" and "atypical thrusting" is not the critical factor in planning treatment for patients demonstrating tongue thrust behavior. Evaluation of factors including age of the patient, breathing pattern, cranio-facial characteristics, head and body posture are important in determining when, and how to provide treatment.