Dental Emergencies

In this sense, trauma to teeth and their supporting tissues.  This involves injuries to the dental hard tissues (enamel,
dentine and cement), the pulp and the alveolar process, to concussion of the tooth to avulsion of the tooth and its
re-implacement within its socket.

This is a broad subject and other people explain it far better than me.

Regardless though, I list here very useful websites and also a variety of articles about dental trauma.
Dental Emergencies & Trauma
Photo of dental trauma, effecting the right incisors and lower canine, with the avulsion of the upper right central
dento-alveolar fracture
containing the lower right incisors and canine.
Useful Websites:

The Dental Trauma Guide

University Hospital of Copenhagen, Dental Trauma Guide 2010

British Dental Health Foundation - Cracked Teeth

Emedicine - Dental, Avulsed Tooth

Emedicine - Dental, Displaced Tooth

Emedicine - Dental, Fractured Tooth

MaxFaxSHO.co.uk - Dental Trauma: History and Examination

MedicsDirect.co.uk - Trauma to Teeth

MedicsDirect.co.uk - Treatment Of A Knocked Out Adult Tooth

NCEMI.org - Avulsed Tooth (Tooth Loss)

NCEMI.org - Dental Trauma (Fracture, Subluxation and Displacement)
Last Updated 26th May 2016
Useful Articles:

BMJ 2000.  Dental Damage, Sequelae and Prevention

BMJ 2000.  ABC of Oral Health - Dental Emergencies

BMJ 2000.  ABC of Oral Health - Improving Occlusion and Oro-Facial Aesthetics: Tooth Repair and Replacement

Chapter 5 - Dental Emergencies

J Can Dent Assoc 2003.  Avulsions and Intrusions - the Controversial Displacement Injuries

American Academy of Pediatric Dentistry 2004.  Clinical Guideline on Management of Acute Dental Trauma

American Association of Endodontists 2004.  Recommended Guidelines of the American Association of
Endodontists for the Treatment of Traumatic Dental Injuries