Plastic and Reconstructive Surgery — MCQs

Plastic and Reconstructive Surgery Indian Medical PG Practice Questions and MCQs

Question 231: Which of the following flaps is known for having a fixed pivot point at the base?

A. Interpolation flap
B. Rotation flap (Correct Answer)
C. Advancement flap
D. Transposition flap

Explanation: ***Rotation flap*** - The **rotation flap** has a **fixed pivot point** at its base and rotates around this point in an arc to cover the adjacent defect. - The flap moves through a rotational movement, maintaining its blood supply through the base, which acts as the pivot. - Commonly used in scalp reconstruction, cheek defects, and trunk defects where rotational movement can close the defect. *Advancement flap* - The **advancement flap** moves forward in a **linear sliding motion** without rotation. - It does not have a fixed pivot point; instead, it advances directly into the defect. - Examples include V-Y advancement and bipedicle advancement flaps. *Transposition flap* - The **transposition flap** moves laterally over intervening normal tissue to reach the defect. - While it rotates, it does not have the same fixed pivot point characteristic as a rotation flap. - Examples include rhomboid flap and bilobed flap. *Interpolation flap* - The **interpolation flap** is transferred over or under intervening tissue, requiring a second stage to divide the pedicle. - It does not have a fixed pivot point at the base in the same manner as rotation flaps. - Examples include forehead flap for nasal reconstruction and cross-finger flap.

Question 232: Which of the following rods is not used with a dental surveyor in prosthodontics?

A. Surveying table
B. Incisal guide pin (Correct Answer)
C. Carbon marker
D. Analyzing rod

Explanation: ***Incisal guide pin*** - An **incisal guide pin** is used with an **articulator** to maintain the vertical dimension of occlusion and guide incisal movements, not with a dental surveyor. - Its purpose is to control the separation of the casts during articulation, unrelated to identifying undercuts or path of insertion. *Analyzing rod* - The **analyzing rod** is a component of a dental surveyor used to visually determine the **undercuts** and the most favorable path of insertion/removal for a removable partial denture. - It is typically a straight, tapered rod that helps in identifying desirable and undesirable undercuts on abutment teeth and soft tissues. *Carbon marker* - The **carbon marker** (or marking rod) is used with the dental surveyor to **mark the height of contour** on the abutment teeth. - This line indicates where the retentive arm of a clasp assembly will be placed relative to the non-retentive arm and helps design the denture base. *Surveying table* - The **surveying table** is not a rod but rather the **platform on which the cast is mounted and tilted** during surveying. - It allows for precise angulation of the cast to establish the desired path of insertion and removal for the prosthesis.

Practice by Chapter

Wound Healing

Practice Questions

Skin Grafts

Practice Questions

Flap Surgery Principles

Practice Questions

Local Flaps

Practice Questions

Regional Flaps

Practice Questions

Microsurgical Techniques

Practice Questions

Tissue Expansion

Practice Questions

Breast Reconstruction

Practice Questions

Hand Surgery Basics

Practice Questions

Craniofacial Surgery Principles

Practice Questions

Aesthetic Surgery Concepts

Practice Questions

Body Contouring

Practice Questions

Want unlimited practice?

Get full access to all questions, explanations, and performance tracking.

Start For Free