Overjet, Dental
Conditions
Keywords
sleep, upper airway, dental occlusion, jaw function, overjet, children, adolescents
Brief summary
This project examines sleep (e.g. prevalence of obstructive sleep apnea(OSA)), dimension of upper airway, jaw function, well-being and quality of life in children with large overjet compared to a control group. In addition, the effect of treatment with a mandibular advancement device (MAD) on sleep, upper airway and jaw function are examined, and how these factors affect the children's well-being and quality of life.
Detailed description
Sleep is very important for children's growth, development and learning. The anatomy and size of the airway and position of the jaw can affect children's sleep. Children with large overjet due to a posterior position of the mandible have smaller airways compared to children with neutral occlusion. Reduced dimensions of the upper airways may increase the risk of impaired sleep quality and the sleep related breathing disorder obstructive sleep apnoea (OSA), which causes symptoms e.g. failure to thrive, irritability, behavioural disorders, fatigue, which affects the children's growth, development, and learning negatively. Children with large overjet due to mandibular retrognathia in Denmark are offered orthodontic treatment in municipal dental care and are in most cases treated with a mandibular advancement device (MAD) keeping the mandible in a forward position relative to the maxilla. MADs are also used to treat adults with mild-moderate obstructive sleep apnoea while they sleep. This can reduce the number of apnoea periods by up to 75% as well as preventing daytime sleepiness. No previous study have examined sleep, upper airway, jaw function, well-being and quality of life in children with large overjet before, during and after MAD treatment compared to a control group with normal occlusion.
Interventions
DEVICEOrthodontic treatment with functional appliance (MAD)
Expansion plate and z-activator (MAD)
Sponsors
Postgraduate Programme in Orthodontics, Copenhagen
Sygekassernes Helsefond
The Danish Dental Association
Københavns Kommune
Hørsholm Kommune
Rødovre Kommune
Hvidovre Kommune
Høje-Taastrup Kommune
University of Copenhagen
Study design
Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
DIAGNOSTIC
Masking
SINGLE (Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
9 Years to 14 Years
Healthy volunteers
Yes
Inclusion criteria
Overjet group: * Horizontal maxillary overjet ≥ 6 mm and need of orthodontic treatment according to the Danish procedure for screening the child population for malocclusion involving health risk. * Informed consent from parent(s)/guardian(s) Control group: * Neutral occlusion * No history of orthodontic treatment * Informed consent from parent(s)/guardian(s)
Exclusion criteria
* Known general and/or craniofacial syndromes/diseases * Known sleep disorders, included bruxism during sleep * Chronic respiratory diseases and asthma6/12 * Adenoid vegetations, hypertrophic tonsils and significantly reduces airflow through the nose (mouth breather), which need primary treatment. * Dysfunction of masticatory muscles and temporomandibular joint, which need primary treatment.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Berlin questionnaire | Baseline | The questionnaire consists of 2 categories related to the risk of having sleep apnea. Patients can be classified into High Risk or Low Risk based on their responses to the individual items and their overall scores in the symptom categories 1 and 2. Category 1: 5 questions. Positive score if ≥2 points Category 2: 3 questions. Positive score if ≥2 points High Risk: if there are 2 or more categories where the score is positive. Low Risk: if there is only 1 or no categories where the score is positive. |
| Presence and grade of obstructive sleep apnea | Baseline | Overnight polygraphy performed at home. Apnea: Reduction of ≥ 90 % of the oronasal airflow compared to baseline lasting for more than two breaths' duration. Hypopnea: Reduction of oronasal airflow of ≥ 30 % compared to baseline; desaturation of blood oxygen of ≥ 3% lasting for more than two breaths' duration, or association of desaturation with an arousal. Apnea-hypopnea pr hour during sleep (AHI-index) Normal: AHI \<1; mild: AHI\>1; moderate: AHI\>5; severe: AHI\>10 |
| Oxygen desaturation index (ODI) | Baseline | Overnight polygraphy performed at home. Oxygen saturation (SpO2%) measured in %. ODI is the number of desaturation events (a 4% decrease in SpO2%) per hour of total sleep ODI\<1 is considered normal. |
| Snore Index | Baseline | Overnight polygraphy performed at home. Snore Index %= time spent snoring / total time spent in bed. |
| Lowest SpO2% | Baseline | Overnight polygraphy performed at home. The lowest value of oxygen saturation (SpO2%) measured in %; the optimal values are 94-100% Normal: SpO2% =92-100%; mild: SpO2% =89-91%; moderate: SpO2% =76-85%; severe: SpO2% =≤75% |
| Average SpO2% | Baseline | Overnight polygraphy performed at home. Oxygen saturation (SpO2%) measured in %; the optimal values are 94-100% Normal: SpO2% =92-100%; mild: SpO2% =89-91%; moderate: SpO2% =76-85%; severe: SpO2% =≤75% |
| SpO2 under 90 % | Baseline | Overnight polygraphy performed at home. Oxygen saturation (SpO2%) measured in %; the optimal values are 94-100% |
| Pulse Average | Baseline | Overnight polygraphy performed at home. Average of the pulse during the total sleep Continuous scale |
| Oximeter quality % | Baseline | Overnight polygraphy performed at home. Oximeter signal quality in % from 0-100. ≥75 % is considered good |
| Flow quality % | Baseline | Overnight polygraphy performed at home. Nasal cannula flow signal quality in % from 0-100. ≥75 % is considered good |
| Respiratory inductance plethysmography (RIP) quality % | Baseline | Overnight polygraphy performed at home. Thoracic and abdominal signal quality in % from 0-100. ≥75 % is considered good |
| Estimated sleep efficiency % | Baseline | Overnight polygraphy performed at home. The percentage of time the child/adolescent sleep, in relation to the amount of time he/she spends in bed. Estimated sleep efficiency % = Total Sleep Time / Total Time in bed. ≥80 % is considered good/normal |
| Respiration rate | Baseline | Overnight polygraphy performed at home. Number of breaths per minute Normal values according to age: 18-30 (6-12 years) and 12-20 (\<12 years) |
| Epworth Sleepiness Scale for Children and Adolescents (ESS(CHAD)) | Baseline | ESS(CHAD) questionnaire: Over the last month, how likely have you been to fall asleep while doing the listed activities? Scale: 0 = would never fall asleep; 1 = slight chance of falling asleep; 2 = moderate chance of falling asleep; 3 = high chance of falling asleep. Interpretation of score: 0-5 Lower Normal Daytime Sleepiness; 6-10 Higher Normal Daytime Sleepiness; 11-12 Mild Excessive Daytime Sleepiness; 13-15 Moderate Excessive Daytime Sleepiness; 16-24 Severe Excessive Daytime Sleepiness. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Acoustic pharyngometry | Baseline | Volumen of mouth/pharynx measured in volume cm3 Minimum cross-sectional area (MCA) measured in cm2 Distance to MCA in cm. |
| Acoustic rhinometry | Baseline | Calculated resistance (cm H2O/L/min) Volume of the nasal cavity (cm3) Minimum cross-sectional area (MCA) measured in cm2 Distance to MCA in cm. |
| Cephalometric x-ray | Baseline | Performed in study group before and after treatment to calculate the upper airway dimensions (cm\^2). Margins: Superior: Hard and soft palate; Inferior: Vallecula (plane of the hyoid bone; base of the epiglottis); Anterior: Circumvallate papillae and the oropharyngeal isthmus; Posterior: Respective pharyngeal wall Results adjusted for height and weight and compared over time. |
| Cone-Beam Computed Tomography | Baseline | Performed in study group before and after treatment to calculate the upper airway dimensions (cm\^3). Margins: Superior: Hard and soft palate; Inferior: Vallecula (plane of the hyoid bone; base of the epiglottis); Anterior: Circumvallate papillae and the oropharyngeal isthmus; Posterior: Respective pharyngeal wall; Lateral: Respective pharyngeal walls Results adjusted for height and weight and compared over time. |
Other
| Measure | Time frame | Description |
|---|---|---|
| Chew-efficiency | Baseline | Chewing time (seconds, s) of 10 gram of a standardized Granny Smith apple slice with the rind and core removed. No normal values are previously estimated. |
| Well-being | Baseline | Strength and difficulties questionnaire examining well-being: emotional symptoms, conduct problems, inattention, peer relationship problems, prosocial behaviour. 25 questions with graduated score (true, partly true, not true). |
| Quality of life | Baseline | Questionnaire KIDSCREEN-10 examining quality of life 10 questions with graduating score, higher score indicate higher quality of life |
| Dental occlusion | Baseline | 3D imaging dental scanning. Width and height of the palate (mm) between upper canines and upper first molars. Results adjusted for height and weight and compared between the groups, and within the groups over time. |
| Weight | Baseline | Weight without shoos in kilograms |
| Body Mass Index | Baseline | Body Mass Index (BMI= kg/m\^2) |
| Height | Baseline | Height without shoos in meter |
| Nordic Orofacial Test-Screening | Baseline | The interview part focuses on 'sensory function', 'breathing', 'habits', 'chewing/swallowing', 'drooling' and 'dryness of the mouth'; and the examination part focuses on 'face at rest', 'nose breathing', 'facial expression', 'masticatory muscle and jaw function', 'oral motor function' and 'speech'. The NOT-S results in a score from 0 to 12; and the larger NOT-S score, the severe orofacial dysfunction and reverse. |
| Bite force (BF) | Baseline | BF examination done by the use of a Flöy-strand. The average of the four measurements was calculated and registered as the maximum BF in Newton (kg\*m/s\^2). |
| DC/TMD | Baseline | Symptom Questionnaire' familiar symptoms related to temporomandibular joint (TMJ), regarding five different topics: 'pain', 'headache', 'jaw joint noises', 'closed locking of the jaw' and 'open locking of the jaw', was examined. Clinical examination of jaw mobility (mm), TMJ and masticatory muscles ascertained according to Diagnostic Criteria for Temporomandibular Disorders (DC/TMD) using DC/TMD Axis I. On the basis of clinical DC/TMD examination and the questionnaire the diagnostic was made according to the DC/TMD and categorized in three groups: no TMD diagnosis, myofascial pain diagnosis and joint displacements diagnosis. |
Countries
Denmark
Outcome results
None listed