767455

In the initial phase of treatment for hemochromatosis, phlebotomy is usually performed once a week to rapidly reduce iron stores. Once transferrin saturation and serum ferritin levels become normal, the frequency is typically reduced to every three months for maintenance.

231453

Oxytocin is synthesized in the paraventricular nucleus of the hypothalamus and acts on the uterus to increase the force and frequency of contractions during childbirth. It is released during labor and stimulated by the stretching of the cervix and vagina as the baby descends. Estrogens increase the sensitivity of the uterus to oxytocin, while progesterone decreases it. Prolactin is involved in milk production and let-down reflex. Cortisol is a stress hormone that prepares the body for parturition but does not directly increase uterine contractions.

231099

Pre-extraction records provide the most accurate information regarding the size, shape, and position of the teeth before extraction, making them the best criterion for selecting replacement teeth in prosthodontics.

253064

The osmotic fragility test is the most relevant investigation for diagnosing hereditary spherocytosis, as it assesses the red blood cells' ability to withstand osmotic stress.

782658

To localize a supernumerary or an impacted tooth and determine its exact relationship to the other teeth, the most effective radiographs would be two or more periapical views at different angles and an occlusal view.

701264

The correct concentration for topically applied acidulated phosphate fluoride is 1.23% (Answer: 2). This concentration is commonly used in various dental products like gels, foams, and varnishes for professional in-office applications to strengthen tooth enamel and prevent decay. It is acidulated to facilitate better penetration into the enamel.

456731

The servo system theory, which relates to the control mechanisms in orthodontics, was proposed by Petrov ic (option 2). This theory helps in understanding how forces applied to teeth can be controlled and adjusted to achieve desired tooth movements during orthodontic treatment.

437093