PGCEE MDS 2022 : Commonest cause of TMJ ankylosis is:

 # Commonest cause of TMJ ankylosis is:

a) Trauma

b) Development disturbances

c) Infections 

d) Atrophy

The correct answer is A. Trauma. 

The definite cause of ankylosis of TMJ is unknown. Two main factors predisposing to the ankylosis are trauma and infection in or around the joint region. In 1968, Topazian reported that 26 to 75 percent of cases of TMJ ankylosis are seen following trauma, while 44 to 68 percent are seen due to infection. 

A high percentage of TMJ ankylosis are seen following trauma. At birth, TMJ may receive trauma from a forceps delivery. Trauma during intrauterine life leads to congenital ankylosis.

PGCEE MDS 2022 MCQ: Enzymes are generally:

 # Enzymes are generally:

A. Proteins

B. Carbohydrate

C. Lipid

D. Vitamin

The correct answer is A. Proteins. 

Enzymes may be defined as biocatalysts synthesized by living cells. They are protein in nature (exception - RNA acting as ribozyme), colloidal and thermolabile in character, and specific in their action.

Nerve involved in Saturday night palsy is:

 # Nerve involved in Saturday night palsy is:

A. Radial

B. Median

C. Auxiliary

D. Facial

The correct answer is A. Radial. 

THE TERM Saturday night palsy has become synonymous with radial nerve compression in the arm resulting from direct pressure against a firm object. It typically follows deep sleep on the arm, often after alcohol intoxication. The commonly accepted origin of the phrase is the association of Saturday night with drinking alcohol heavily.

Multiple odontogenic cysts are seen in:

 # Multiple odontogenic cysts are seen in:

A. Cherubism

B. Apert’s syndrome

C. Marfan’s syndrome

D. Down’s syndrome

The correct answer is C. Marfan's syndrome.

Oral Manifestations of Marfan's syndrome

According to Baden and Spirgi, who have reviewed the oral manifestations of this disease, a high, arched palatal vault is very prevalent and may be a constant finding. Bifid uvula is also reported as well as malocclusion. In addition, multiple odontogenic cysts of the maxilla and mandible have occasionally been reported, most recently by Oatis and his coworkers. One additional finding sometimes present, is temporomandibular dysarthrosis