NEET MDS Lessons
Pedodontics
Classification of Cerebral Palsy
Cerebral palsy (CP) is a group of neurological disorders that affect movement, muscle tone, and motor skills. The classification of cerebral palsy is primarily based on the type of neuromuscular dysfunction observed in affected individuals. Below is an outline of the main types of cerebral palsy, along with their basic characteristics.
1. Spastic Cerebral Palsy (Approximately 70% of Cases)
- Definition: Characterized by hypertonicity (increased muscle tone) and exaggerated reflexes.
- Characteristics:
- A. Hyperirritability of Muscles: Involved muscles exhibit exaggerated contractions when stimulated.
- B. Tense, Contracted Muscles:
- Example: Spastic Hemiplegia affects one side of the body, with the affected hand and arm flexed against the trunk. The leg may be flexed and internally rotated, leading to a limping gait with circumduction of the affected leg.
- C. Limited Neck Control: Difficulty controlling neck muscles results in head rolling.
- D. Trunk Muscle Control: Lack of control in trunk muscles leads to difficulties in maintaining an upright posture.
- E. Coordination Issues: Impaired coordination of
intraoral, perioral, and masticatory muscles can result in:
- Impaired chewing and swallowing
- Excessive drooling
- Persistent spastic tongue thrust
- Speech impairments
2. Dyskinetic Cerebral Palsy (Athetosis and Choreoathetosis) (Approximately 15% of Cases)
- Definition: Characterized by constant and uncontrolled movements.
- Characteristics:
- A. Uncontrolled Motion: Involved muscles exhibit constant, uncontrolled movements.
- B. Athetoid Movements: Slow, twisting, or writhing involuntary movements (athetosis) or quick, jerky movements (choreoathetosis).
- C. Neck Muscle Involvement: Excessive head movement due to hypertonicity of neck muscles, which may cause the head to be held back, with the mouth open and tongue protruded.
- D. Jaw Involvement: Frequent uncontrolled jaw movements or severe bruxism (teeth grinding).
- E. Hypotonicity of Perioral Musculature:
- Symptoms include mouth breathing, tongue protrusion, and excessive drooling.
- F. Facial Grimacing: Involuntary facial expressions may occur.
- G. Chewing and Swallowing Difficulties: Challenges in these areas are common.
- H. Speech Problems: Communication difficulties may arise.
3. Ataxic Cerebral Palsy (Approximately 5% of Cases)
- Definition: Characterized by poor coordination and balance.
- Characteristics:
- A. Incomplete Muscle Contraction: Involved muscles do not contract completely, leading to partial voluntary movements.
- B. Poor Balance and Coordination: Individuals may exhibit a staggering or stumbling gait and difficulty grasping objects.
- C. Tremors: Possible tremors or uncontrollable trembling when attempting voluntary tasks.
4. Mixed Cerebral Palsy (Approximately 10% of Cases)
- Definition: A combination of characteristics from more than one type of cerebral palsy.
- Example: Mixed spastic-athetoid quadriplegia, where features of both spastic and dyskinetic types are present.
Types of Crying
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Obstinate Cry:
- Characteristics: This cry is loud, high-pitched, and resembles a siren. It often accompanies temper tantrums, which may include kicking and biting.
- Emotional Response: It reflects the child's external response to anxiety and frustration.
- Physical Manifestation: Typically involves a lot of tears and convulsive sobbing, indicating a high level of distress.
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Frightened Cry:
- Characteristics: This cry is not about getting what the child wants; instead, it arises from fear that overwhelms the child's ability to reason.
- Physical Manifestation: Usually involves small whimpers, indicating a more subdued response compared to the obstinate cry.
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Hurt Cry:
- Characteristics: This cry is a reaction to physical discomfort or pain.
- Physical Manifestation: It may start with a single tear that runs down the child's cheek without any accompanying sound or resistance, indicating a more internalized response to pain.
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Compensatory Cry
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Characteristics:
- This type of cry is not a traditional cry; rather, it is a sound that the child makes in response to a specific stimulus, such as the sound of a dental drill.
- It is characterized by a constant whining noise rather than the typical crying sounds associated with distress.
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Physical Manifestation:
- There are no tears or sobs associated with this cry. The child does not exhibit the typical signs of emotional distress that accompany other types of crying.
- The sound is directly linked to the presence of the stimulus (e.g., the drill). When the stimulus stops, the whining also ceases.
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Emotional Response:
- The compensatory cry may indicate a child's attempt to cope with discomfort or fear in a situation where they feel powerless or anxious. It serves as a way for the child to express their discomfort without engaging in more overt forms of crying.
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Classifications of Intellectual Disability
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Intellectual Disability (General Definition)
- Description: Intellectual disability is characterized by significant limitations in both intellectual functioning and adaptive behavior, which covers many everyday social and practical skills. It originates before the age of 18.
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Classifications Based on IQ Scores:
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Idiot
- IQ Range: Less than 25
- Description: This classification indicates profound intellectual disability. Individuals in this category may have very limited ability to communicate and perform basic self-care tasks.
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Imbecile
- IQ Range: 25 to 50
- Description: This classification indicates severe intellectual disability. Individuals may have some ability to communicate and perform simple tasks but require significant support in daily living.
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Moron
- IQ Range: 50 to 70
- Description: This classification indicates mild intellectual disability. Individuals may have the ability to learn basic academic skills and can often live independently with some support. They may struggle with complex tasks and social interactions.
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Leeway Space
Leeway space refers to the size differential between the primary posterior teeth (which include the primary canines, first molars, and second molars) and their permanent successors, specifically the permanent canines and first and second premolars. This space is significant in orthodontics and pediatric dentistry because it plays a crucial role in accommodating the permanent dentition as the primary teeth exfoliate.
Size Differential
Typically, the combined width of the primary posterior teeth is greater than
that of the permanent successors. For instance, the sum of the widths of the
primary canine, first molar, and second molar is larger than the combined widths
of the permanent canine and the first and second premolars. This inherent size
difference creates a natural space when the primary teeth are lost.
Measurement of Leeway Space
On average, the leeway space provides approximately:
- 3.1 mm of space per side in the mandibular arch (lower jaw)
- 1.3 mm of space per side in the maxillary arch (upper jaw)
This space can be crucial for alleviating crowding in the dental arch, particularly in cases where there is insufficient space for the permanent teeth to erupt properly.
Clinical Implications
When primary teeth fall out, the leeway space can be utilized to help relieve
crowding. If this space is not preserved, the permanent first molars tend to
drift forward into the available space, effectively closing the leeway space.
This forward drift can lead to misalignment and crowding of the permanent teeth,
potentially necessitating orthodontic intervention later on.
Management of Leeway Space
To maintain the leeway space, dental professionals may employ various
strategies, including:
- Space maintainers: These are devices used to hold the space open after the loss of primary teeth, preventing adjacent teeth from drifting into the space.
- Monitoring eruption patterns: Regular dental check-ups can help track the eruption of permanent teeth and the status of leeway space, allowing for timely interventions if crowding begins to develop.
Behavioral Classification Systems in Pediatric Dentistry
Understanding children's behavior in the dental environment is crucial for effective treatment and management. Various classification systems have been developed to categorize these behaviors, which can assist dentists in guiding their approach, systematically recording behaviors, and evaluating research validity.
Importance of Behavioral Classification
- Behavior Guidance: Knowledge of behavioral classification systems helps dentists tailor their behavior guidance strategies to individual children.
- Systematic Recording: These systems provide a structured way to document children's behaviors during dental visits, facilitating better communication and understanding among dental professionals.
- Research Evaluation: Behavioral classifications can aid in assessing the validity of current research and practices in pediatric dentistry.
Wright’s Clinical Classification
Wright’s clinical classification categorizes children into three main groups based on their cooperative abilities:
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Cooperative:
- Children in this category exhibit positive behavior and are generally relaxed during dental visits. They may show enthusiasm and can be treated using straightforward behavior-shaping approaches. These children typically follow established guidelines and perform well within the framework provided.
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Lacking in Cooperative Ability:
- This group includes children who demonstrate significant difficulties in cooperating during dental procedures. They may require additional support and alternative strategies to facilitate treatment.
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Potentially Cooperative:
- Children in this category may show some willingness to cooperate but may also exhibit signs of apprehension or reluctance. They may need encouragement and reassurance to engage positively in the dental environment.
Frankl Behavioral Rating Scale
The Frankl behavioral rating scale is a widely used tool that divides observed behavior into four categories, ranging from definitely positive to definitely negative. The scale is as follows:
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Rating 1: Definitely Negative:
- Characteristics: Refusal of treatment, forceful crying, fearfulness, or any other overt evidence of extreme negativity.
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Rating 2: Negative:
- Characteristics: Reluctance to accept treatment, uncooperativeness, and some evidence of a negative attitude (e.g., sullen or withdrawn behavior).
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Rating 3: Positive:
- Characteristics: Acceptance of treatment with cautious behavior at times; willingness to comply with the dentist, albeit with some reservations. The patient generally follows the dentist’s directions cooperatively.
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Rating 4: Definitely Positive:
- Characteristics: Good rapport with the dentist, interest in dental procedures, and expressions of enjoyment (e.g., laughter).
Application of the Frankl Scale
- Research Tool: The Frankl method is popular in research settings for assessing children's behavior in dental contexts.
- Shorthand Recording: Dentists can use shorthand notations (e.g., “+” for positive behavior, “-” for negative behavior) to quickly document children's responses during visits.
- Limitations: While the scale is useful, it may not provide sufficient clinical information regarding uncooperative children. For example, simply recording “-” does not convey the nuances of a child's behavior. A more descriptive notation, such as “- tearful,” offers better insight into the clinical problem.
Transpalatal Arch
The transpalatal arch (TPA) is a fixed orthodontic appliance used primarily in the maxillary arch to maintain or regain space, particularly after the loss of a primary molar or in cases of unilateral space loss. It is designed to provide stability to the molars and prevent unwanted movement.
Indications
- Unilateral Loss of Space:
- The transpalatal arch is particularly effective in cases where there is unilateral loss of space. It helps maintain the position of the remaining molar and prevents mesial movement of the adjacent teeth.
- It can also be used to maintain the arch form and provide anchorage during orthodontic treatment.
Contraindications
- Bilateral Loss of Space:
- The use of a transpalatal arch is contraindicated in cases of bilateral loss of space. In such situations, the appliance may not provide adequate support or stability, and other treatment options may be more appropriate.
Limitations/Disadvantages
- Tipping of Molars:
- One of the primary limitations of the transpalatal arch is the potential for both molars to tip together. This tipping can occur if the arch is not properly designed or if there is insufficient anchorage.
- Tipping can lead to changes in occlusion and may require additional orthodontic intervention to correct.
Self-Mutilation in Children: Causes and Management
Overview of Self-Mutilation
Self-mutilation through biting and other forms of self-injury can be a significant concern in children, particularly those with severe emotional disturbances or specific syndromes. Understanding the underlying causes and appropriate management strategies is essential for healthcare providers.
Associated Conditions
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Lesch-Nyhan Syndrome (LNS):
- A genetic disorder characterized by hyperuricemia, neurological impairment, and self-mutilating behaviors, including biting and head banging.
- Children with LNS often exhibit severe emotional disturbances and may engage in self-injurious behaviors.
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Congenital Insensitivity to Pain:
- A rare condition where individuals cannot feel physical pain, leading to a higher risk of self-injury due to the inability to recognize harmful stimuli.
- Children with this condition may bite or injure themselves without understanding the consequences.
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Autism:
- Children with autism may engage in self-injurious behaviors, including biting, as a response to sensory overload, frustration, or communication difficulties.
- Friedlander and colleagues noted that facial bruising, abrasions, and intraoral traumatic ulcerations in autistic children are often the result of self-injurious behaviors rather than abuse.
Management Strategies
Management of self-mutilation in children requires careful consideration of the underlying condition and the child's developmental stage. Two primary approaches are often discussed:
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Protective Appliances:
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Mouthguards:
- Littlewood and Mitchell reported that mouthguards can be beneficial for children with congenital insensitivity to pain. These devices help protect the oral cavity from self-inflicted injuries.
- Mouthguards can serve as a temporary measure until the child matures enough to understand and avoid self-mutilating behaviors, which is typically learned through painful experiences.
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Mouthguards:
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Surgical Procedures:
- In some cases, surgical intervention may be necessary to address severe self-injurious behaviors or to repair damage caused by biting.
- The decision to pursue surgical options should be made on a case-by-case basis, considering the child's overall health, the severity of the behaviors, and the potential for improvement.
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Pharmacological Interventions:
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Carbamazepine:
- Cusumano and colleagues reported that carbamazepine may be beneficial for children with Lesch-Nyhan syndrome. This medication can help manage behavioral symptoms and reduce self-injurious behaviors.
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Carbamazepine: