|Year : 2010 | Volume
| Issue : 1 | Page : 35-40
Role of oral health professional in pediatric obstructive sleep apnea
Sanjeev Kumar Verma1, Sandhya Maheshwari1, Naresh Kumar Sharma2, KC Prabhat1
1 Department of Orthodontics and Dental Anatomy, Dr. Z. A. Dental College, Aligarh Muslim University, Aligarh, India
2 Department of Oral Maxillofacial Surgery, Saraswati Dental College, Lucknow, India
|Date of Web Publication||9-Sep-2010|
K C Prabhat
Department of Orthodontics and Dental Anatomy, Dr. Z. A. Dental College, Aligarh Muslim University, Aligarh
Source of Support: None, Conflict of Interest: None
| Abstract|| |
Sleep disordered breathing (SDB) in children is common. The impact of SDB on the growth and development of child may have detrimental effects on health, neuropsychological development, quality of life, and economic potential; therefore, SDB in children should be recognized as a public health problem as in the adult population. The coexistence of obesity and obstructive sleep apnea (OSA) not only appears to yield increased morbidity rates and poorer responses to therapy, but also is altogether associated with a distinct and recognizable clinical phenotype. Therapeutic options have somewhat expanded since the initial treatment approaches were conducted, to include not only surgical extraction of hypertrophic adenoids and tonsils, but also nonsurgical alternatives such as continuous positive air pressure, anti-inflammatory agents and oral appliances (OAs). Now, American academy of sleep medicine (AAOSM) has recommended OAs for OSA, hence the therapeutic interventions that are directed at the site of airway obstruction in the maxillofacial region are within the scope of dentistry. Among the physicians treating the children, dentists are more likely to identify adenotonsillar hypertrophy. Hence, the dentist can play an important role in identifying and treating those cases with OAs, who refuse the surgery, or those with structural abnormality in which myofunctional appliances are beneficial.
Keywords: Obstructive sleep apnea, oral appliances, polysomnography
|How to cite this article:|
Verma SK, Maheshwari S, Sharma NK, Prabhat K C. Role of oral health professional in pediatric obstructive sleep apnea. Natl J Maxillofac Surg 2010;1:35-40
|How to cite this URL:|
Verma SK, Maheshwari S, Sharma NK, Prabhat K C. Role of oral health professional in pediatric obstructive sleep apnea. Natl J Maxillofac Surg [serial online] 2010 [cited 2020 May 30];1:35-40. Available from: http://www.njms.in/text.asp?2010/1/1/35/69162
| Introduction|| |
Sleep is a major physiological drive. An average child spends almost one-half of his or her life asleep. A newborn sleeps for as much as 16 hours a day, which plays an important role in children's development. Sleep disorders can impair child's health and lead to negative consequences. Thus, respiratory disorders during sleep like obstructive sleep apnea (OSA) are of particular importance during childhood. OSA is characterized by repeated episodes of airway obstruction for more than 10 seconds during sleep, resulting in pauses in breathing. OSA is the most common condition among a group of disorders called sleep disordered breathing (SDB) that can affect both adults and children. Recently, increasing attention has been paid to OSA among children. Epidemiologic studies have shown that the prevalence of SDB is about 2% among children , and about 2.5-6% among adolescents.  Goodwin and others  observed that boys are more likely to have OSA, which is consistent with the tendency for overweight adult males to have OSA. OSA in children has emerged not only as a relatively prevalent condition but also as a disease that imposes a large array of morbidities, some of which may have long-term implications, well into adulthood. Among the physicians treating children, dentists are most likely to identify adenotonsillar hypertrophy; thus, it may be in the patient's best interests if dentists act as "gatekeepers" in identifying children with adenotonsillar hypertrophy. This review is attempted to provide the role of the oral health professional in the diagnosis and management of OSA.
| Pathophysiology of Obstructive Sleep Apnea|| |
The etiology of childhood OSA is quite different from that of the adult condition. In adults, OSA is usually associated with obesity and other causes. Obese children are also at risk for OSA, and the degree of OSA is proportional to the degree of obesity.  However, most children with OSA are not obese. In fact, they may have failure to thrive. Instead, the vast majority of cases of OSA in children are associated with adenotonsillar hypertrophy [Figure 1]. The peak prevalence of childhood OSA is at 2-8 years, which is the age when the tonsils and adenoids are the largest in relation to the underlying airway size; endoscopy has shown that the site of collapse is most often at the level of the adenoid  and most children with OSA improve following tonsillectomy and adenoidectomy (T and A).  OSA also occurs in children with upper airway narrowing [Figure 2] due to malocclusion and craniofacial anomalies or those with neuromuscular abnormalities such as hypotonia (e.g., muscular dystrophy)  or muscular incoordination (e.g., cerebral palsy). 
Guilleminault and colleagues reported a cohort of children who were cured of their OSA by adenotonsillectomy, but developed a recurrence during adolescence.  Thus, it appears that childhood OSA is a dynamic process resulting from a combination of structural and neuromotor abnormalities, rather than from structural abnormalities alone.
McNamara and coworkers  found that obstructive apneas were associated with arousal in less than half of the apneas in children and only 18% of apneas in infants. As a result, sleep architecture is preserved in children with OSA, , and therefore, excessive daytime sleepiness, the cardinal symptom of OSA in adults, is uncommon in children.  However, although apnea-related electroencephalogram (EEG) arousals are less common in children than in adults, subcortical arousals, as demonstrated by movement , or autonomic changes,  occur frequently. It is also possible that subtle disturbances in sleep architecture, which cannot be detected on routine polysomnography (PSG), are present.  These factors may contribute to neurobehavioral and autonomic complications.
| Diagnosis|| |
Diagnosis of OSAs is based on clinical suspicion, history and physical findings, and confirmation is made by PSG.
History and physical evaluation
Snoring and difficulty in breathing during sleep are the most common complaints of parents of children with OSAs, with reports of such symptoms in more than 96% of cases. , However, the history of snoring alone cannot distinguish between children with OSA and children with primary snoring. 
Children appear to be very restless during the night, frequently changing sleep positions  and may prefer sleeping while sitting upright or propped upon pillows [Figure 3]. Other common nocturnal findings include increased diaphoresis and enuresis. Chronic sleep apnea may lead to cor pulmonale and pulmonary hypertension.
Although respiration in children with OSA is typically unremarkable during wakefulness, some children with severe OSA may manifest difficulty in breathing when awake, albeit less so than when asleep. Excessive daytime somnolence in children has been shown to correlate with severity of OSA and with increased body mass index.  However, in contrast to reports in adults with OSA, excessive daytime somnolence is less common in children with OSA, being present in 7-10% of children with OSA. ,
Behavioral manifestations of children with OSA may be very similar to those with attention deficit hyperactivity disorder. ,, Both the disorders may present with symptoms of hyperactivity, inattentiveness and poor academic performance.
Physical examination begins with a general observation of the patient. Mouth breathing and adenoidal facies should be noted. Hyponasal voice is a clue of nasal obstruction and a muffled voice is suggestive of adenotonsillar enlargement. The lateral facial profile should be inspected for retrognathia, micrognathia [Figure 4] or midfacial hypoplasia. All these can affect the nasopharyngeal and oropharyngeal passages and are key findings for diagnosis. The oral cavity should be observed for tongue and soft palate size and appearance: a large tongue and/or a high-arched or elongated palate, or a low dependent palate may predispose to SDB.
Upper airway evaluation
Upper airway evaluation can be done with endoscopy/laryngoscopy,pharyngometry and radiographic evaluation [computed tomography (CT) or magnetic resonance imaging (MRI)].
Unattended home studies in children with OSA have been improving in quality. In one study using a comprehensive methodology including cardiorespiratory and 8 hours of video recording, results obtained were very similar to those obtained by PSG in the laboratory. 
PSG is the gold standard in the diagnosis of OSA. PSG involves the overnight recording of sleep breathing patterns and oxygen saturation. PSG provide apnea hypopnea index (AHI) score. AHI scores are an estimation of apneic-hypopneic episode per hour of sleep. Among children, an AHI >1 and oxygen desaturations ≥ 4% are indicators of mild OSA. ,, In comparison, an AHI of 5 (or sometimes 10) among adults generally indicates mild OSA.
| Treatment of Obstructive Sleep Apnea in Children|| |
treatment of OSA in children depends largely on the underlying cause of the problem and may include one of the following.
Surgical treatment of obstructive sleep apnea
Adenotonsillectomy (T and A) is generally considered to be the standard treatment of childhood sleep apnea with normal craniofacial features and uncomplicated medical status. T and A is curative of sleep apnea in a majority of the pediatric cases.  However, not all children who undergo T and A for OSA are cured. ,, In a meta-analysis of the published literature, the success rate for T and A in the context of OSA was observed to be approximately 85%.  This figure may actually be lower, particularly among obese children with OSA ,,,, or among children with severe OSA. ,
Diet and medications
For obese children, weight loss and maintaining a healthy diet might prove to be the ultimate treatment for their OSA.  Antibiotic medication,  topical intranasal application of corticosteroids,  leukotriene receptor antagonist  and anti-inflammatory therapy  can be used for mild or residual OSA after surgery.
Positive airway pressure treatment
Continuous positive airway pressure (CPAP) is the first-line therapy for adult sleep apnea and is considered the second-line therapy in children since surgical therapy is generally curative. CPAP has been studied in children , and has been found to be effective for the treatment of OSA.  CPAP has been approved by the US Food and Drug Administration for use in children >7 years of age in the United States.
The role of oral appliances (OAs) in the treatment of patients with OSA has gained prominence since their introduction in 1982. Recently, the American Academy of Sleep Medicine published practice parameters for the treatment of snoring and OSA with OA, establishing a first-line role for OA in the treatment of adult patients with mild-to-moderate OSA, and a second-line role for patients with severe OSA.  While these practice parameters recommend that an OA should be prescribed by experienced dental personnel knowledgeable in sleep medicine and/or sleep-related breathing disorders, relatively few dentists have the necessary training to accurately identify OSA or treat the entity with an OA [[Figure 5] and Algorithm 1[Additional file 1] showing the mode of action of OAs in OSA].
Finally, OAs [Figure 6], which are primarily provided by dentists, have become increasingly popular within the past few years for the treatment of OSA. ,, OAs are of particular interest to people who opt not to have surgery and cannot tolerate CPAP treatment. OAs provide effective treatment for many patients and, in one study, were shown to be effective in as many as 50% of patients with OSA.  Researchers investigating the use of OAs for children ,, have found certain types to be particularly effective in treating OSA. For example, according to Cozza and colleagues, , a new orthodontic appliance, a modified monobloc, not only is effective in reducing apneic events during sleep, but also improves subjective sleep quality and daytime performance among children. Recently, a study published by Etsuko Miyao and others who conducted orthodontic treatment using an OA for a child with mandibular retrusion and sleep apnea syndrome (SAS), reported that it was cured following orthodontic treatment.  The present study shows that patients with skeletal problems such as maxillary protrusion, mandibular micrognathia and mandibular retrusion can expect a significant improvement of snoring and SAS due to the forward movement or growth of the mandible [Figure 7]. Various orthodontic appliances have been used to move or make the mandible grow forward in patients with micrognathia or mandibular retrusion. The use of OAs has involved dentists in the treatment of OSA among both adults and children.
|Figure 7 :Pretreatment and post treatment lateral head cephalogram showing mandibular advancement|
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| Role of Dentists in Diagnosis and Treatment of Sleep Apnea in Children|| |
According to Brouillette and colleagues,  increasing awareness of OSA and examination of sleeping patients should result in earlier treatment and less morbidity for infants and children with OSA. As adenotonsillar hypertrophy is one of the main causes of OSA among children, investigating the prevalence of OSA among children with adenotonsillar hypertrophy is an important research task. There is evidence that physicians may not always recognize childhood OSA.  According to Konno and colleagues,  an average delay of 23 months occurred between identification of pediatric patients with large tonsils and their referral to a sleep clinic.
Among the physicians treating children, dentists are most likely to identify adenotonsillar hypertrophy; thus, it may be in the patient's best interests if dentists act as "gatekeepers" in identifying children with adenotonsillar hypertrophy. As discussed above, dentists are becoming increasingly aware of sleep apnea in adults, as some are involved in using OAs to treat this disorder. Once dentists identify children with adenotonsillar hypertrophy, they should inform the parents about the risk of OSA and further inform their family physician about the importance of sleep assessment in children with enlarged tonsils. Involvement of dentists in this process can contribute significantly to the health of patients, as OSA, with such significant developmental consequences, can be diagnosed and treated at an early stage, preventing later problems and complications.
| Conclusion|| |
SDB in children is common. The impact of SDB on the growth and development of a child may have detrimental effects on health, neuropsychological development, quality of life and economic potential; therefore, SDB in children should be recognized as a public health problem as it is in the adult population. In identifying and treating OSA among children with adenotonsillar hypertrophy, dentists can play an important role by noting the size of the tonsils when looking into child's mouth and informing the child's parents and the primary care physician when enlarged tonsils are observed.
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[Figure 1], [Figure 2], [Figure 3], [Figure 4], [Figure 5], [Figure 6], [Figure 7]
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