NEET MDS Lessons
Pedodontics
Anomalies of Number: problems in initiation stage
Hypodontia: 6% incidence; usually autosomal dominant (50% chance of passing to children) with variable expressivity (e.g., parent has mild while child has severe); most common missing permanent tooth (excluding 3rd molars) is Md 2nd premolar, 2nd most common is X lateral; oligodontia (at least 6 missing), and anodontia
1. Clincial implications: can interfere with function, lack of teeth → ↓ alveolar bone formation, esthetics, hard to replace in young children, implants only after growth completed, severe cases should receive genetic and systemic evaluation to see if other problems
2. Syndromes with hypodontia: Rieger syndrome, incontinentia pigmenti, Kabuki syndrome, Ellis-van Creveld syndrome, epidermolysis bullosa junctionalis, and ectodermal dysplasia (usually X-linked; sparse hair, unable to sweat, dysplastic nails)
Supernumerary teeth: aka hyperdontia; mesiodens when located in palatal midline; occur sporadically or as part of syndrome, common in cleft cases; delayed eruption often a sign that supernumeraries are preventing normal eruption
1. Multiple supernumerary teeth: cleidocranial dysplasia/dysostosis, Down’s, Apert, and Crouzon syndromes, etc.
Anomalies of Size: problems in morphodifferentiation stage
Microdontia: most commonly peg laterals; also in Down’s syndrome, hemifacial microsomia
Macrodontia: may be associated with hemifacial hypertrophy
Fusion: more common in primary dentition; union of two developing teeth
Gemination: more common in primary; incomplete division of single tooth bud → bifid crown, one pulp chamber; clinically distinguish from fusion by counting geminated tooth as one and have normal # teeth present (not in fusion)
Anomalies of Shape: errors during morphodifferentiation stage
Dens evaginatus: extra cusp in central groove/cingulum; fracture can → pulp exposure; most common in Orientals
Dens in dente: invagination of inner enamel epithelium → appearance of tooth within a tooth
Taurodontism: failure of Hertwig’s epithelial root sheath to invaginate to proper level → elongated (deep) pulp chamber, stunted roots; sporadic or associated with syndrome (e.g., amelogenesis imperfecta, Trichodento-osseous syndrome, ectodermal dysplasia)
Conical teeth: often associated with ectodermal dysplasia
Anomalies of Structure: problems during histodifferentiation, apposition, and mineralization stages
Dentinogenesis imperfecta: problem during histodifferentiation where defective dentin matrix → disorganized and atubular circumpulpal dentin; autosomal dominant inheritance; three types, one occurs with osteogenesis imperfecta (brittle bone syndrome); not sensitive despite exposed dentin; primary dentition has bulbous crowns, obliterated pulp chambers, bluish-grey or brownish-yellow teeth that are easily worn; permanent teeth often stained but can be sound
Amelogenesis imperfecta: heritable defect, independent from metabolic, syndromes, or systemic conditions (though similar defects seen with syndromes or environmental insults); four main types (hypoplastic, hypocalcified, hypomaturation, hypoplastic/hypomaturation with taurodontism); proper treatment addresses sensitivity, esthetics, VDO, caries and gingivitis prevention
Enamel hypoplasia: quantitative defect of enamel from problems in apposition stage; localized (caused by trauma) or generalized (caused by infection, metabolic disease, malnutrition, or hereditary disorders) effects; more common in malnourished children; least commonly Md incisors affected, often 1st molars; more susceptible to caries, excessive wearing → lost VDO, esthetic problems, and sensitivity to hot/cold
Enamel hypocalcification: during calcification stage
Fluorosis: excess F ingestion during calcification stage → intrinsic stain, mottled appearance, or brown staining and pitting; mild, moderate, or severe; porous enamel soaks up external stain
Best Method of Communicating with a Fearful Deaf Child
- Visual Communication: For a deaf child, the best method
of communication is through visual means. This can include:
- Sign Language: If the child knows sign language, using it directly is the most effective way to communicate.
- Gestures and Facial Expressions: Non-verbal cues can convey emotions and instructions. A warm smile, thumbs up, or gentle gestures can help ease anxiety.
- Visual Aids: Using pictures, diagrams, or even videos can help explain what will happen during the dental visit, making the experience less intimidating.
Use of Euphemisms (Word Substitutes) or Reframing
- Euphemisms: This involves using softer, less frightening terms to describe dental procedures. For example, instead of saying "needle," you might say "sleepy juice" to describe anesthesia. This helps to reduce anxiety by reframing the experience in a more positive light.
- Reframing: This technique involves changing the way a situation is perceived. For instance, instead of focusing on the discomfort of a dental procedure, you might emphasize how it helps keep teeth healthy and strong.
Basic Fear of a 2-Year-Old Child During His First Visit to the Dentist
- Fear of Separation from Parent: At this age, children often experience separation anxiety. The unfamiliar environment of a dental office and the presence of strangers can heighten this fear. It’s important to reassure the child that their parent is nearby and to allow the parent to stay with them during the visit if possible.
Type of Fear in a 6-Year-Old Child in Dentistry
- Subjective Fear: This type of fear is based on the child’s personal experiences and perceptions. A 6-year-old may have developed fears based on previous dental visits, stories from peers, or even media portrayals of dental procedures. This fear can be more challenging to address because it is rooted in the child’s individual feelings and experiences.
Type of Fear That is Most Usually Difficult to Overcome
- Long-standing Subjective Fears: These fears are often deeply ingrained and can stem from traumatic experiences or prolonged anxiety about dental visits. Overcoming these fears typically requires a more comprehensive approach, including gradual exposure, reassurance, and possibly behavioral therapy.
The Best Way to Help a Frightened Child Overcome His Fear
- Effective Methods for Fear Management:
- Identification of the Fear: Understanding what specifically frightens the child is crucial. This can involve asking questions or observing their reactions.
- Reconditioning: Gradual exposure to the dental environment can help the child become more comfortable. This might include short visits to the office without any procedures, allowing the child to explore the space.
- Explanation and Reassurances: Providing clear, age-appropriate explanations about what will happen during the visit can help demystify the process. Reassuring the child that they are safe and that the dental team is there to help can also alleviate anxiety.
The Four-Year-Old Child Who is Aggressive in His Behavior in the Dental Stress Situation
- Manifesting a Basic Fear: Aggressive behavior in a dental setting often indicates underlying fear or anxiety. The child may feel threatened or overwhelmed by the unfamiliar environment, leading to defensive or aggressive responses. Identifying the source of this fear is essential for addressing the behavior effectively.
A Child Patient Demonstrating Resistance in the Dental Office
- Manifesting Anxiety: Resistance, such as refusing to open their mouth or crying, is typically a sign of anxiety. This can stem from fear of the unknown, previous negative experiences, or separation anxiety. Addressing this anxiety requires patience, understanding, and effective communication strategies to help the child feel safe and secure.
Erikson's Eight Stages of Psychosocial Development
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Basic Trust versus Basic Mistrust (Hope):
- Age: Infants (0-1 year)
- Description: In this stage, infants learn to trust their caregivers and the world around them. Consistent and reliable care leads to a sense of security.
- Positive Outcome: If caregivers provide reliable care and affection, the infant develops a sense of trust, leading to feelings of safety and hope.
- Negative Outcome: Inconsistent or neglectful care can result in mistrust, leading to anxiety and insecurity.
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Autonomy versus Shame and Doubt (Will):
- Age: Toddlers (1-2 years)
- Description: As toddlers begin to explore their environment and assert their independence, they face the challenge of developing autonomy.
- Positive Outcome: Encouragement and support from caregivers foster a sense of autonomy and confidence in their abilities.
- Negative Outcome: Overly critical or controlling caregivers can lead to feelings of shame and doubt about their abilities.
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Initiative versus Guilt (Purpose):
- Age: Early Childhood (2-6 years)
- Description: Children begin to initiate activities, assert control over their environment, and develop a sense of purpose.
- Positive Outcome: When children are encouraged to take initiative, they develop a sense of purpose and leadership.
- Negative Outcome: If their initiatives are met with criticism or discouragement, they may develop feelings of guilt and inhibition.
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Industry versus Inferiority (Competence):
- Age: Elementary and Middle School (6-12 years)
- Description: Children learn to work with others and develop skills and competencies. They begin to compare themselves to peers.
- Positive Outcome: Success in school and social interactions fosters a sense of competence and achievement.
- Negative Outcome: Failure to succeed or negative comparisons can lead to feelings of inferiority and a lack of self-worth.
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Identity versus Role Confusion (Fidelity):
- Age: Adolescence (12-18 years)
- Description: Adolescents explore their personal identity, values, and beliefs, seeking to establish a sense of self.
- Positive Outcome: Successful exploration leads to a strong sense of identity and fidelity to one's beliefs and values.
- Negative Outcome: Failure to establish a clear identity can result in role confusion and uncertainty about one's place in the world.
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Intimacy versus Isolation (Love):
- Age: Young Adulthood (19-40 years)
- Description: Young adults seek to form intimate relationships and connections with others.
- Positive Outcome: Successful relationships lead to deep connections and a sense of love and belonging.
- Negative Outcome: Fear of intimacy or failure to form meaningful relationships can result in feelings of isolation and loneliness.
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Generativity versus Stagnation (Care):
- Age: Middle Adulthood (40-65 years)
- Description: Adults strive to contribute to society and support the next generation, often through parenting, work, or community involvement.
- Positive Outcome: A sense of generativity leads to feelings of productivity and fulfillment.
- Negative Outcome: Failure to contribute can result in stagnation and a sense of unfulfillment.
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Integrity versus Despair (Wisdom):
- Age: Late Adulthood (65 years to death)
- Description: Older adults reflect on their lives and evaluate their experiences.
- Positive Outcome: A sense of integrity arises from a life well-lived, leading to feelings of wisdom and acceptance.
- Negative Outcome: Regret over missed opportunities or unresolved conflicts can lead to despair and dissatisfaction with life.
Classification of Oral Habits
Oral habits can be classified based on various criteria, including their nature, impact, and the underlying motivations for the behavior. Below is a detailed classification of oral habits:
1. Based on Nature of the Habit
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Obsessive Habits (Deep Rooted):
- International or Meaningful:
- Examples: Nail biting, digit sucking, lip biting.
- Masochistic (Self-Inflicting):
- Examples: Gingival stripping (damaging the gums).
- Unintentional (Empty):
- Examples: Abnormal pillowing, chin propping.
- International or Meaningful:
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Non-Obsessive Habits (Easily Learned and Dropped):
- Functional Habits:
- Examples: Mouth breathing, tongue thrusting, bruxism (teeth grinding).
- Functional Habits:
2. Based on Impact
- Useful Habits:
- Habits that may have a positive or neutral effect on oral health.
- Harmful Habits:
- Habits that can lead to dental issues, such as malocclusion, gingival damage, or tooth wear.
3. Based on Author Classifications
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James (1923):
- a) Useful Habits
- b) Harmful Habits
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Kingsley (1958):
- a) Functional Oral Habits
- b) Muscular Habits
- c) Combined Habits
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Morris and Bohanna (1969):
- a) Pressure Habits
- b) Non-Pressure Habits
- c) Biting Habits
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Klein (1971):
- a) Empty Habits
- b) Meaningful Habits
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Finn (1987):
- I. a) Compulsive Habits
- b) Non-Compulsive Habits
- II. a) Primary Habits
4. Based on Functionality
- Functional Habits:
- Habits that serve a purpose, such as aiding in speech or feeding.
- Dysfunctional Habits:
- Habits that disrupt normal oral function or lead to negative consequences.
Distal Shoe Space Maintainer
The distal shoe space maintainer is a fixed appliance used in pediatric dentistry to maintain space in the dental arch following the early loss or removal of a primary molar, particularly the second primary molar, before the eruption of the first permanent molar. This appliance helps to guide the eruption of the permanent molar into the correct position.
Indications
- Early Loss of Second Primary Molar:
- The primary indication for a distal shoe space maintainer is the early loss or removal of the second primary molar prior to the eruption of the first permanent molar.
- It is particularly useful in the maxillary arch, where bilateral space loss may necessitate the use of two appliances to maintain proper arch form and space.
Contraindications
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Inadequate Abutments:
- The presence of multiple tooth losses may result in inadequate abutments for the appliance, compromising its effectiveness.
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Poor Patient/Parent Cooperation:
- Lack of cooperation from the patient or parent can hinder the successful use and maintenance of the appliance.
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Congenitally Missing First Molar:
- If the first permanent molar is congenitally missing, the distal shoe may not be effective in maintaining space.
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Medical Conditions:
- Certain medical conditions, such as blood dyscrasias, congenital heart disease (CHD), rheumatic fever, diabetes, or generalized debilitation, may contraindicate the use of a distal shoe due to increased risk of complications.
Limitations/Disadvantages
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Overextension Risks:
- If the distal shoe is overextended, it can cause injury to the permanent tooth bud of the second premolar, potentially leading to developmental issues.
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Underextension Risks:
- If the appliance is underextended, it may allow the molar to tip into the space or over the band, compromising the intended space maintenance.
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Epithelialization Prevention:
- The presence of the distal shoe may prevent complete epithelialization of the extraction socket, which can affect healing.
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Eruption Path Considerations:
- Ronnermann and Thilander (1979) discussed the path of eruption, noting that drifting of teeth occurs only after eruption through the bone covering. The lower first molar typically erupts occlusally to contact the distal crown surface of the primary molar, using that contact for uprighting. Isolated cases of ectopic eruption should be considered when evaluating the eruption path.
Pulpotomy
Pulpotomy is a dental procedure that involves the surgical removal of the coronal portion of the dental pulp while leaving the healthy pulp tissue in the root canals intact. This procedure is primarily performed on primary (deciduous) teeth but can also be indicated in certain cases for permanent teeth. The goal of pulpotomy is to preserve the vitality of the remaining pulp tissue, alleviate pain, and maintain the tooth's function.
Indications for Pulpotomy
Pulpotomy is indicated in the following situations:
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Deep Carious Lesions: When a tooth has a deep cavity that has reached the pulp but there is no evidence of irreversible pulpitis or periapical pathology.
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Trauma: In cases where a tooth has been traumatized, leading to pulp exposure, but the pulp is still vital and healthy.
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Asymptomatic Teeth: Teeth that are asymptomatic but have deep caries that are close to the pulp can be treated with pulpotomy to prevent future complications.
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Primary Teeth: Pulpotomy is commonly performed on primary teeth that are expected to exfoliate naturally, allowing for the preservation of the tooth until it is ready to fall out.
Contraindications for Pulpotomy
Pulpotomy is not recommended in the following situations:
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Irreversible Pulpitis: If the pulp is infected or necrotic, a pulpotomy is not appropriate, and a pulpectomy or extraction may be necessary.
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Periapical Pathology: The presence of periapical radiolucency or other signs of infection at the root apex indicates that the pulp is not healthy enough to be preserved.
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Extensive Internal Resorption: If there is significant internal resorption of the tooth structure, the tooth may not be viable for pulpotomy.
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Inaccessible Canals: Teeth with complex canal systems that cannot be adequately accessed may not be suitable for this procedure.
The Pulpotomy Procedure
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Anesthesia: Local anesthesia is administered to ensure the patient is comfortable and pain-free during the procedure.
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Access Opening: A high-speed bur is used to create an access opening in the crown of the tooth to reach the pulp chamber.
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Removal of Coronal Pulp: The coronal portion of the pulp is carefully removed using specialized instruments. This step is crucial to eliminate any infected or necrotic tissue.
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Hemostasis: After the coronal pulp is removed, the area is treated to achieve hemostasis (control of bleeding). This may involve the use of a medicated dressing or hemostatic agents.
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Application of Diluted Formocresol: A diluted formocresol solution (typically a 1:5 or 1:10 dilution) is applied to the remaining pulp tissue. Formocresol acts as a fixative and has antibacterial properties, helping to preserve the vitality of the remaining pulp and prevent infection.
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Pulp Dressing: A biocompatible material, such as calcium hydroxide or mineral trioxide aggregate (MTA), is placed over the remaining pulp tissue to promote healing and protect it from further injury.
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Temporary Restoration: The access cavity is sealed with a temporary restoration to protect the tooth until a permanent restoration can be placed.
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Follow-Up: The patient is scheduled for a follow-up appointment to monitor the tooth's healing and to place a permanent restoration, such as a stainless steel crown, if the tooth is a primary tooth.
Margaret S. Mahler’s Theory of Object Relations
Overview of Mahler’s Theory
Margaret S. Mahler's theory of object relations focuses on the development of personality in early childhood through the understanding of the child's relationship with their primary caregiver. Mahler proposed that this development occurs in three main stages, each characterized by specific psychological processes and milestones.
Stages of Childhood Development
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Normal Autistic Phase (0 – 1 Year):
- Description: This phase is characterized by a state of half-sleep and half-wakefulness. Infants are primarily focused on their internal needs and experiences.
- Key Features:
- The infant is largely unaware of the external environment and caregivers.
- The primary goal during this phase is to achieve equilibrium with the environment, establishing a sense of basic security and comfort.
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Normal Symbiotic Phase (3 – 4 Weeks to 4 – 5 Months):
- Description: In this phase, the infant begins to develop a slight awareness of the caregiver, but both the infant and caregiver remain undifferentiated in their relationship.
- Key Features:
- The infant experiences a sense of oneness with the caregiver, relying on them for emotional and physical needs.
- There is a growing recognition of the caregiver's presence, but the infant does not yet see themselves as separate from the caregiver.
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Separation-Individualization Phase (5 to 36 Months):
- This phase is crucial for the development of a sense of self and independence. It is further divided into four subphases:
a. Differentiation (5 – 10 Months):
- Description: The infant begins to recognize the distinction between themselves and the caregiver.
- Key Features:
- Increased awareness of the caregiver's presence and the environment.
- The infant may start to explore their surroundings while still seeking reassurance from the caregiver.
b. Practicing Period (10 – 16 Months):
- Description: During this period, the child actively practices their emerging mobility and independence.
- Key Features:
- The child explores the environment more freely, often moving away from the caregiver but returning for comfort.
- This stage is marked by a sense of exhilaration as the child gains new skills.
c. Rapprochement (16 – 24 Months):
- Description: The child begins to seek a balance between independence and the need for the caregiver.
- Key Features:
- The child may exhibit ambivalence, wanting to explore but also needing the caregiver's support.
- This phase is characterized by emotional fluctuations as the child navigates their growing autonomy.
d. Consolidation and Object Constancy (24 – 36 Months):
- Description: The child develops a more stable sense of self and an understanding of the caregiver as a separate entity.
- Key Features:
- The child achieves object permanence, recognizing that the caregiver exists even when not in sight.
- This phase solidifies the child's ability to maintain emotional connections with the caregiver while exploring independently.
Merits of Mahler’s Theory
- Applicability to Children: Mahler's theory provides valuable insights into the emotional and psychological development of children, particularly in understanding the dynamics of attachment and separation from caregivers.
Demerits of Mahler’s Theory
- Lack of Comprehensiveness: While Mahler's theory offers important perspectives on early childhood development, it is not considered a comprehensive theory. It may not account for all aspects of personality development or the influence of broader social and cultural factors.