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NEET MDS Shorts

65010
Dental Materials

 

 

40390
Periodontics

Thick manageable true pockets with no recession are best treated by an apically displaced flap procedure. The apically displaced flap technique is a common surgical method in periodontics that is effective for reducing pocket depth and increasing the width of attached gingiva, particularly in cases with sufficient keratinized tissue and no recession.

38199
Pedodontics

Scaling and root planing prevent further loss of attachment in deep pockets.

45703
Dental Materials

The pH is mentioned to be around 2.8 after 3 minutes, which indicates an acidic nature initially.

98790
Orthodontics

Intercanine width serves as safety valve for dominant horizontal basal mandibular growth spurt.

34040
Endodontics

The most frequent failures of root canal treated cases are often due to inadequate obturation. This can occur when the root canal filling material does not completely fill the space or when it is not properly compacted, leaving gaps where bacteria can persist and cause reinfection. Proper preparation and sterilization are also crucial, but inadequate obturation is the most common technical error leading to treatment failure.

68312
Physiology

Vitamin E is an important antioxidant that protects unsaturated fats in cell membranes from oxidation. Without vitamin E, these fats can become oxidized, leading to decreased fluidity and altered function of membranes.

22272
Dental Materials

The text states that poly (methyl methacrylate) has a water sorption value of 0.69 mg/cm², which affects its dimensional stability and physical properties.

18200
General Medicine

Myocardial infarction most often results in mitral regurgitation. MI can damage papillary muscles or cause left ventricular dysfunction, leading to mitral valve incompetence. This is the most common valvular complication following MI, especially inferior wall infarcts.

94937
Periodontics

Fanconi’s syndrome is a disorder of the proximal renal tubules in the kidney, resulting in the failure to reabsorb glucose, amino acids, uric acid, and phosphates, which are then lost in the urine. It is primarily a metabolic and renal condition and does not involve the melanocyte-stimulating pathways required for hyperpigmentation.


 Addison’s Disease (Adrenal Insufficiency)
Mechanism: Primary adrenal failure leads to a lack of cortisol, which triggers the pituitary gland to overproduce ACTH (Adrenocorticotropic Hormone).
Pigmentation: Because ACTH shares a precursor (POMC) with Melanocyte-Stimulating Hormone (MSH), high levels of ACTH directly stimulate melanocytes.
Clinical Sign: This causes diffuse, "bronzing" hyperpigmentation of the skin (especially at pressure points/scars) and patchy brown/black macules on the oral mucosa (buccal mucosa and gingiva). 

Peutz-Jeghers Syndrome
Mechanism: An autosomal dominant genetic disorder caused by mutations in the STK11 gene.
Pigmentation: It is characterized by pathognomonic melanotic macules (1–5 mm freckle-like spots) appearing early in childhood.
Clinical Sign: These spots are most prominent on the lips (vermilion border), perioral skin, and buccal mucosa. They are often the first sign of the syndrome, which also involves gastrointestinal hamartomatous polyps. 

McCune-Albright Syndrome
Mechanism: A complex genetic disorder involving polyostotic fibrous dysplasia and endocrine hyperfunction.
Pigmentation: It features characteristic café-au-lait macules.
Clinical Sign: These are typically large, unilateral, and have irregular "Coast of Maine" borders. While primarily cutaneous, they are a classic example of syndromic melanin hyperpigmentation. 

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