Thyroplasty

Type I thyroplasty is a form of medialization laryngoplasty, in which an implant is placed between the thyroid cartilage and the vocalis muscle to medialize the membranous vocal fold.

Isshiki divided thyroplasty procedures into 4 categories to produce functional alteration of vocal cords:

• Type 1 : Medial displacement of vocal cord (done by injection of gel foam/Teflon paste)
• Type 2 : Lateral displacement of cord (done to improve the airway)
• Type 3 : Shortening (relax) the cord, to lower the pitch (gender transformation from female to male)
• Type 4 : Lengthening (tightening) the cord, to elevate the pitch (gender transformation from male to female)

Ans. is `c’ i.e., Thyroplasty type III

Puberphonia (Mutational falset to voice)

• In males at the time of puberty, the voice normally drops by an octave and becomes low pitch. It occurs because vocal cords lengthen.
• Failure of this change leads to persistence of childhood high pitched voice and is called as puberphonia.
• It is seen in boys who are emotionally insecure and show excessive attachment to their mothers. Their physical and sexual development is normal.
• So the surgical treatment of puberphonia is lengthening of vocal cord i. e. Thyroplasty type III

THYROPLASTY

• Isshiki divided thyroplasty procedures into 4 categories to produce functional alteration of vocal cords : –

1. Type 1: Medial displacement of vocal cord (done by injection of gel foam/Teflon paste)
2. Type 2 : Lateral displacement of cord (done to improve the airway).
3. Type 3 : Lengthening (relax) the cord, to lower the pitch (gender transformation from female to male).
4. Type 4 : Shortening (tightening) the cord, to elevate the pitch (gender transformation from male to female), for example as a treatment of androphonia.