NEET MDS Shorts
24081
EndodonticsReplacement resorption results in ankylosis. This process involves: 1) Loss of periodontal ligament due to trauma or infection, 2) Direct contact between root surface and alveolar bone, 3) Osteoblasts lay down bone tissue directly on root surface, 4) Root dentin is gradually replaced by bone tissue, 5) Tooth becomes fused to surrounding bone (ankylosis). This condition is irreversible and eventually leads to complete replacement of root structure with bone. Pain and periapical abscess are not typical consequences of replacement resorption itself.
93820
EndodonticsSuproxol is a 30% hydrogen peroxide solution specifically used for bleaching discolored endodontically treated teeth. It is the gold standard for non-vital tooth bleaching because it has high concentration that provides effective bleaching, can penetrate dentin tubules to remove deep stains, and works well in the walking bleach technique. Ether and chloroform are solvents, not bleaching agents, while sodium hypochlorite is an irrigant, not a bleaching agent.
27977
EndodonticsPulpectomy is the complete removal of the pulp tissue from the pulp chamber and root canals of a tooth. This procedure is the standard treatment for irreversible pulpitis, as the inflamed and infected pulp cannot heal and must be entirely removed to save the tooth and prevent further infection.
48024
EndodonticsExplanation: A concussion in dental trauma refers to a situation where the tooth is not displaced but may have sustained an injury that can lead to an enamel fracture. This type of injury does not involve loss of tooth structure, which aligns with the description of an enamel fracture without tooth structure loss.
90846
EndodonticsCarbamide peroxide used in bleaching degrades into 3% hydrogen peroxide and 7% urea. The breakdown process: 1) 10% carbamide peroxide releases approximately 3% hydrogen peroxide, 2) The hydrogen peroxide is the active bleaching agent that breaks down chromophores, 3) Urea provides pH buffering and reduces sensitivity, 4) The slow release over 6-8 hours provides sustained bleaching action. This makes carbamide peroxide ideal for home bleaching as it provides controlled, sustained hydrogen peroxide release.
47668
EndodonticsThe wrong statement about obturation is that silver cones are recommended for canals in which posts are placed. Actually: 1) Silver cones ARE recommended for fine tortuous canals where gutta-percha placement is difficult, 2) McSpadden compactors DO operate at 6000-10,000 rpm, 3) Silver cones are NOT recommended for post preparation because they are difficult to remove and can corrode, 4) Gutta-percha is preferred for post cases as it can be easily sectioned and removed. Silver cones create problems during post preparation due to their metallic nature and removal difficulty.
35540
EndodonticsThe most generally accepted treatment of horizontal root fracture in the apical third of a maxillary central incisor involves frequent pulp testing and radiographic examination (monitoring approach). This conservative approach is preferred because: 1) Apical third fractures have excellent prognosis for natural healing, 2) Pulp often remains vital and functional, 3) Splinting may not be necessary as the fracture is inherently stable, 4) Regular monitoring allows early intervention if complications arise, 5) Surgical intervention or extraction is rarely needed. The healing usually occurs with fibrous tissue union.
24934
EndodonticsAging pulp is characterized by increased fibrosis and formation of pulp stones (denticles). There is actually decreased vascularity and fewer fibroblasts with age, making option 2 the correct answer.
49638
Endodontics
The dental pulp, a highly vascularized connective tissue, responds to any form of injury or insult (such as trauma, chemical irritation, or bacterial invasion from caries) with an inflammatory reaction, also known as pulpitis.
99254
Endodontics
Thermal testing is the most common diagnostic test used to determine the status of pulp vitality in dentistry. It assesses the nerve response of the pulp to hot or cold stimuli.