Which tooth within the permanent dentition shows the highest susceptibility to dental caries ?
Show answer Hide answer
Answer: C. Mandibular 1st molar
Explanation
The mandibular first molar is the earliest permanent posterior tooth to erupt. It possesses deep occlusal pits and fissures that readily trap dental plaque. These anatomical features make it the most vulnerable tooth to dental caries. Permanent first molars erupt around six years of age behind deciduous teeth. Enamel maturation continues post-eruption, leaving newly emerged surfaces susceptible. Pit and fissure morphology accounts for the majority of carious lesions in children.
Dental sealant application effectively protects these vulnerable fissures from decay. Preventive education emphasizes early oral hygiene habits targeting permanent molars. Prompt restorative care preserves arch integrity and normal masticatory function. Maxillary first premolars erupt later and possess less complex occlusal fissures. Maxillary second molars erupt later in adolescence and experience less early decay. Mandibular second molars erupt around age twelve and are slightly less vulnerable initially.
Related questions
Q1. What is the primary etiology responsible for dilaceration ?
Show answer Hide answer
Answer: A. Trauma to the tooth germ during root development
Dilaceration is a developmental anomaly caused by physical trauma to the tooth germ. Mechanical impact abruptly alters the path of ongoing calcified root formation. This disruption produces a sharp angular bend or curvat...
Q2. What is the most frequent anatomical location for basal cell carcinoma ?
Show answer Hide answer
Answer: C. Skin of the lower lip
Basal cell carcinoma occurs most frequently on sun-exposed skin areas of the face. Chronic ultraviolet radiation exposure damages facial skin cells over many decades. The lower lip and periocular regions represent high-r...
Q3. Which event is least likely to trigger enamel hypoplasia ?
Show answer Hide answer
Answer: D. Cleidocranial dysostosis
Cleidocranial dysplasia is a skeletal and dental developmental disorder affecting bones and teeth. The genetic condition does not directly trigger structural enamel hypoplasia defects. Other listed conditions are well-kn...
Q4. Which clinical variant of candidiasis correlates with leukoplakia______________?
Show answer Hide answer
Answer: D. Chronic hyperplastic candidiasis
Chronic hyperplastic candidiasis presents clinically as a firm white plaque lesion. Unlike pseudomembranous candidiasis, these white plaques cannot be scraped off the mucosa. This clinical appearance closely mimics oral...
Q5. Which condition is correlated with reduced levels of ionized serum calcium ?
Show answer Hide answer
Answer: D. Tetany
Tetany is a clinical syndrome caused by hypocalcemia increasing neuromuscular irritability. Reduced ionized serum calcium lowers the threshold for nerve and muscle depolarization. Involuntary muscle spasms and cramps cha...
Q6. Which clinical feature could be observed in cases of acromegaly ?
Show answer Hide answer
Answer: A. Large tongue
Acromegaly results from excess growth hormone secretion in adults leading to tissue enlargement. Macroglossia or enlargement of the tongue is a characteristic clinical feature of the disease. Excess growth hormone stimul...