Setting time of Dental Materials : Alginate setting time, GIC, ZOE, Impression plaster and Zinc Phosphate Setting Time

The Setting time of some of the dental materials is listed in the table below.

Material	Setting time
Fast setting alginates	1-2 minutes
Normal setting alginates	2.5 - 4 minutes
Alginate (Optimal)	3-4 minutes
Impression plaster	4 minutes

MCQs on Tooth Extraction (Exodontia) and Impactions

# All of the following statements about inhaled tooth fragment are true except:
A. It usually enters in the right bronchus
B. It may cause lung abscess
C. It may cause bronchiectasis
D. It will be coughed out spontaneously, no treatment is necessary

# Rotatory movement is used for the extraction of the :
A. Mandibular canine
B. Maxillary central incisor
C. Maxillary lateral incisor
D. All of the above

Important Signs in Clinical Medicine and their Significance : Murphy's Sign, Auspitz's sign, Trousseau's Sign, etc.

Important Signs and their significance

Sign	Significance
Nikolsky's sign	➤ Seen in Pemphigus, familial benign chronic pemphigus and recessive form of epidermolysis bullosa ➤ Loss of epithelium due to rubbing resulting in raw, sensitive surface
Auspitz's sign	➤ Seen in Psoriasis ➤ If the deep scales are removed, one or more tiny bleeding points are disclosed

Treatment of Acute Necrotising Ulcerative Gingivitis (ANUG)

Treatment of ANUG

First Visit	➥Removal of pseudomembrane and non attached debris after the application of a topical anesthetic ➥Patient is advised to rinse with 3% H2O2 (hydrogen peroxide) in equal dilution with warm water every two hours ➥Patients with systemic symptoms and local lymphadenopathy are placed on Amoxicillin 250 or 500 mg QID and Metronidazole 250 or 500 mg TID

G.V. Black's Classification of Tooth Preparations / Cavity Preparations

Based on anatomical location of carious lesion, Greene Vardiman Black (G.V. Black) classified tooth preparations into five different classes. Later an additional class, class VI was also added. Class I refers to pit and fissure lesions, whereas all other classes are smooth surface lesions.

G.V. Black's Classification of Tooth Preparations

Class I	All pit and fissure preparations. It Includes: ➤ occlusal surfaces of premolars and molars, ➤ occlusal two-thirds of the facial and lingual surfaces of molars, and ➤lingual surfaces of maxillary incisors
Class II	Preparations involving the proximal surfaces of posterior teeth  (i.e. Premolars and Molars)

Dentist

Who is a Dentist / Dental Surgeon ?

A dentist is a person who is licensed by the nation or state's licensing body to practice dentistry independently. He can either run a private practice or work as a government employee or an employee in other's clinic. A dentist can examine and diagnose the disease of your oral cavity, perform restorations, rectify maloccluded teeth by the use of removable and fixed orthodontic appliances, extract your tooth, provide partial or complete / removable dental prostheses, etc. The dentist deals not only with the teeth, the rest of the soft tissues like tongue, palate, buccal and labial mucosa are also dealt by the dentist. Extra-oral lesions, swellings, and tumors of the head and neck region too come to the attention of the dentist first. Some facial reconstruction surgeries, surgical correction of cleft lips and palates, implants,etc. all come under the duties of a dentist or dental surgeon.

MCQs on Oral Histology - Salivary Glands Part 2

# Myoepithelial cells are present in:
A. Striated duct
B. Intercalated duct and terminal duct
C. Serous cells
D. Mucous cells

# Carmalt's glands are:
A. Major salivary glands
B. Minor salivary glands(Retromolar)
C. Minor salivary glands (lingual)
D. Taste buds