Kicking techniques of Thai boxing or Muay Thai

Kicking techniques
The teep (literally "foot jab," similar to a front kick) and Cutting the tree (kicking upwards in the shape of a triangle cutting under the arm and ribs) are the two most common kicks in Muay Thai. The Muay Thai roundhouse kick has been widely adopted by fighters from other martial arts. The roundhouse kick uses a rotational movement of the entire body. A Thai fighter uses this to his advantage, and if a round house kick is attempted by the opponent the fighter will block with his shin. Thai boxers are trained to always connect with the shin. While sensitive in an unconditioned practitioner, the shin is the strongest part of the leg. The foot contains many fine bones and is much weaker. A fighter may end up hurting himself if he tries to attack with his foot.

Muay Thai also includes other varieties of kicking, such as the crescent kick, side kick or spinning back kick etc. Another misconception is that the round house kick is the main kick of Muay Thai and that other kicks are rarely used. This only applies to foreigners who adopt the style and don't know the original teaching of Muay Thai.

References :
Muay Thai The Most Distinguished Art of Fighting (Text-book of Pahuyuth) , Panya Kraitus and Dr. Pitisuk Kraitus, Third Edition, Special Revised, 1992, Panya Kraitus, Phuket, Thailand.
Muay Thai Kickboxing - The Ultimate Guide to Conditioning, Training and Fighting, Chad Boykin, 2002, Paladin Press, Boulder, Colorado.
Thai Kickboxing For Beginners - Peter Belmar, 2006, Lulu Press. Muay Thai: A Living Legacy - Kat Prayukvong, 2006, Spry Publishing Co., Ltd.
From Wikipedia