83937

Extensive bone loss is a contraindication for apicoectomy as it indicates poor prognosis and inadequate bone support. Overfilled canals and lateral perforations are actually indications for surgical intervention.

43749

The Ivy eyelet wiring technique involves creating loops around adjacent teeth to provide stabilization during orthodontic treatments. It's commonly used for intermaxillary fixation.

24994

Answer: 4) It activates myosin kinase (MLCK) in the presence of calcium
Explanation: Calcium binds to calmodulin, forming a calcium-calmodulin complex. This complex then activates myosin kinase, which phosphorylates the myosin light chain, leading to the formation of cross-bridges between actin and myosin and initiating muscle contraction in smooth muscles.

67923

Answer: 1) The body is represented in a distorted manner in the somatosensory area-I, with the face and hands having a disproportionately larger representation due to their higher innervation density.

88155

The property of saliva that affects denture retention is both quality and quantity of serous and mucus saliva.

28538

30909

Subgingival calculus is often found in the lower anterior region due to the anatomy and position of the teeth.

76050

The purpose of root canal sealer is to fill the space between solid core material and the pulp canal walls. Root canal sealers serve to: 1) Fill irregularities and accessory canals not occupied by gutta-percha, 2) Create intimate adaptation between core material and canal walls, 3) Provide antimicrobial action in residual bacteria, 4) Seal dentinal tubules to prevent bacterial penetration, 5) Act as lubricant during gutta-percha placement. While sealers may have some biological properties, their primary function is mechanical - filling voids and creating hermetic seal around the core material.

25048

Easy fatigability of muscles is characteristic of myasthenia gravis, an autoimmune disorder affecting neuromuscular transmission. Patients experience progressive muscle weakness with repetitive use that improves with rest. Epilepsy involves seizure activity, MPDS involves muscle pain and spasm, and cerebral palsy involves spasticity, but none of these conditions primarily feature muscle fatigability.

94186

The first light-activated systems were formulated for UV light to initiate free radicals. Today the UV light-cured composites have been replaced by visible blue-light-activated systems with greatly improved depth of cure, a controllable working time, and other advantages.