Biomedical Sciences
Biomedical sciences: integrate, don't isolate
The biomedical domain rewards integration, not isolated memorization. For anatomy, know the trigeminal branches (V1 ophthalmic, V2 maxillary, V3 mandibular), the muscles of mastication (masseter, temporalis, medial and lateral pterygoid), the TMJ capsule and disc, and the relationship of the lingual and inferior alveolar nerves to the mandibular third molar. For physiology and biochemistry, understand calcium homeostasis, bone remodeling, collagen synthesis, and how systemic disease alters healing.
Microbiology questions usually contrast caries pathogens (Streptococcus mutans, lactobacilli) with periodontal pathogens (Porphyromonas gingivalis, Aggregatibacter actinomycetemcomitans). Immunology emphasizes hypersensitivity types: type I (anaphylaxis), type II (cytotoxic), type III (immune complex), and type IV (delayed, e.g., contact stomatitis). General pathology covers acute and chronic inflammation, wound healing by primary and secondary intention, and benign versus malignant neoplasia. Pharmacology focuses on NSAIDs, antibiotics, local anesthetics, epinephrine, and anticoagulants.
Common traps include confusing the chorda tympani (taste to the anterior two-thirds of the tongue) with the lingual nerve proper; assuming antibiotics cure pulpitis; and forgetting that warfarin and heparin are monitored differently. Another trap is attributing a parotid swelling to the submandibular gland because the parotid duct crosses the masseter.
Rule of thumb: trace a nerve or drug to its endpoint, not just its origin. For a mandibular third molar, the lingual nerve lies lingual to the lingual plate and the inferior alveolar nerve lies within the canal; both are at risk, but the buccal nerve is lateral.