Dentosphere : World of Dentistry

# Gingiva is attached to tooth by: A. Epithelial attachment B. Periodontal Ligament C. Connective tissue fibers D. Lamina Propria Answer: A, Epithelial Attachment - Gingiva is attached to tooth by Junctional Epithelium which forms a collar around the tooth. It is wider (15-30 cells thick) at the floor of the gingival sulcus and tapers apically to a final thickness of some 3-4 cells.  - Surface cells of the junctional epithelium provide the actual attachment of gingiva to tooth tissue (the epithelium being sometimes referred to as attachment epithelium) - The internal basal lamina of Junctional epithelium unites the epithelium to tooth whereas the external basal lamina of junctional epithelium unites the epithelium to the connective tissue of the gingiva.  - Basal lamina of junctional epithelium is devoid of type IV collagen and type VIII is present. CLICK HERE TO VIEW  ALL MCQS

Schroeder has classified Cementum as follows: A. Acellular Afibrillar Cementum (AAC) - Contains neither cells nor extrinsic or intrinsic collagen fibers apart from a mineralized ground substance - It is a product of cementoblasts - In humans, it is found in the coronal cementum B. Acellular Extrinsic Fiber Cementum (AEFC) - It is composed entirely of densely packed bundles of Sharpey's fibers and lacks cells. - It is a product of fibroblasts and cementoblasts - In humans, it is found in the cervical 1/3rd of roots but may extend further apically C. Cellular Mixed Stratified Cementum (CMSC) - It is composed of extrinsic (Sharpey's) and predominantly intrinsic fibers and contains cells - It is coproduct of fibroblasts and cementoblasts - In humans, it appears primarily in the apical third of the roots and the apices and in the furcation areas D. Cellular Intrinsic Fiber Cementum (CIFC) - Contains cells but no collagen fibers - It is formed by cementoblasts. ...

# Width of attached gingiva: A. Decreases with age B. Increases with age C. Remains the same D. Is not age-related Answer: B. Increases with age Because the mucogingival junction remains stationary throughout adult life, changes in the width of attached gingiva are caused by the modification in the position of the coronal end. The width of attached gingiva increases with age and in supraerupted teeth, with the wear of the incisal edge and continued tooth eruption. The gingival margin of the tooth, therefore the entire dentogingival complex, moves coronally with a resulting increase in width of the attached gingiva. CLICK HERE TO VIEW  ALL MCQS

This is one of the most frequently faced questions by a dentist, "Doctor, How long will my dental restoration last?" In the competitive world of today, people are taken away by the fake promises and guarantees the corporations and manufacturer companies make and expect everything to have a guarantee. But, this question, in particular, is ridiculous because we cannot predict the health or disease of any person or how long will he last! But, answering the  question, the life of any dental restoration depends principally upon four factors: - remaining tooth structure - material with which the tooth is being restored - clinical technique & expertise of the dentist i.e. how well the restoration is done - post-restoration environmental challenges the tooth is subjected to Let's see all these one by one. i) Remaining tooth structure "A stitch in time saves nine." This age-old proverb can be well realized in dentistry. We can expect the dental restoration...