72304

Explanation: The medial pterygoid muscle primarily functions to move the mandible medially and assist in closing the jaw. It does not directly influence the borders of a maxillary denture in the region of the pterygomaxillary notch. Instead, it is involved in the movement of the mandible and may indirectly affect the fit and stability of the denture.

68852

Acid etching is a dental procedure that creates a micromechanical bond between the tooth surface and a restorative material. This bonding process significantly reduces microleakage, which is the microscopic space between the tooth and the restoration where bacteria and fluids can penetrate.

65010

71692

guiding planes are flat, polished surfaces on the abutment teeth that guide the RPD along a specific path during insertion and removal. They are located adjacent to the edentulous area and are crucial for the proper seating and function of the denture.

45999

Double intensifying screen and screen film are used in extraoral radiographs to reduce exposure time.

69191

Envelope flaps limit access to the operative site and often heal with scar formation due to inadequate blood supply at the incision line. Triangular and rectangular flaps provide better access and healing.

28931

Class I (dental stone) has a longer setting time than impression plaster but is stronger and more dimensionally stable, making it suitable for fabricating models.

32984

Chronic glucocorticoid therapy can lead to a condition known as Cushing's syndrome, which includes various endocrine and metabolic disturbances. One of the common complications is hypercalcemia due to increased bone resorption and impaired calcium excretion in the kidneys. Additionally, glucocorticoids can cause a mild increase in serum phosphorus levels, leading to hyperphosphatemia in some cases.

68629

For a patient on dicoumarol therapy with a prothrombin time of 18 seconds, surgery can be performed as this PT is only mildly elevated and within acceptable limits for minor oral surgery. Normal PT is 11-15 seconds, and a PT of 18 seconds represents manageable anticoagulation levels that don't significantly increase bleeding risk for tooth extraction.

31713

Calculus formation is primarily retarded by daily plaque removal through proper oral hygiene practices, as calculus forms from mineralized plaque.