Shorts

After endodontic treatment, teeth lose moisture and become more brittle. An MOD onlay provides better protection by covering cusps and distributing occlusal forces, unlike an inlay which does not protect cusps from fracture.

The stabilization of an avulsed tooth typically requires a period of 1-2 weeks. During this time, the tooth is often replanted and stabilized to allow for healing and reattachment of the periodontal ligament.

This statement is untrue - carbopol is not typically used in home bleaching systems. Home bleaching uses 10-15% carbamide peroxide in a gel form with custom vacuum-formed trays.

Tooth discoloration most commonly results from pulp necrosis. When pulp tissue dies: 1) Hemoglobin breaks down into iron sulfide and other dark pigments, 2) Protein degradation products penetrate dentin tubules, 3) These pigments become embedded in the tooth structure, 4) The discoloration progresses from pink to dark brown/gray over time. This is more common than hyperemia (which is reversible), pulpal abscess (which may not always cause visible discoloration), making pulp necrosis the primary cause of intrinsic tooth discoloration.

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.

Radiographically, it is virtually impossible to definitively distinguish a granuloma from a cyst. A granuloma consists of inflamed granulation tissue without an epithelial lining, whereas a cyst must have an epithelial-lined lumen. Histology remains the "gold standard" for diagnosis. 

Both sonic and ultrasonic instruments are used in dental procedures, particularly in endodontics and scaling. They generate vibrations that help in the removal of debris and biofilm. A key feature of these instruments is that they require the use of copious amounts of irrigating solutions to enhance their effectiveness, cool the instrument, and flush out debris. While they may also be used for flaring coronal portions of root canals and can be controlled during operation, the commonality that stands out is the need for irrigating solutions.

Normal biting force in natural dentition is approximately 600 N (Newtons), while complete denture wearers can generate only about 110 N due to reduced proprioception and denture movement.