This document discusses open bite, which is a malocclusion where the teeth do not meet vertically when the jaws are closed. It defines open bite and classifies it as either anterior, affecting the front teeth, or posterior, affecting the back teeth. Open bite can also be simple/dental, caused by tooth or jaw issues, or complex/skeletal, caused by skeletal abnormalities. Causes of simple open bite include heredity, habits like thumb sucking, and iatrogenic factors. Complex open bite can result from jaw rotation or trauma during growth. Open bite is diagnosed through extraoral, intraoral exams and cephalograms. Treatment depends on the patient's age and type of open bite, ranging from habit

1. OPEN BITE
Dr. Syed Sarosh Hussain
House Officer HUDH

2. Content
 Definition
 Classification
 Causes
 Diagnosis
 Treatment

3. Definition
 Malocclusion in vertical plane.
 A deviation in the vertical relationship of the maxillary and
mandibular dental arches characterized by a definite lack
of contact between opposing segments of teeth.” (Daniel
Subtelny, 1964).
 “Localized absence of occlusion while the remaining teeth
are in occlusion” (Moyer’s).

4. Classification
 According to location:
1. Anterior Open Bite.
2. Posterior Open Bite.
 According to cause:
1. Dental or Simple Open Bite.
2. Skeletal or Complex Open Bite.

5. According to location
1. Anterior Open Bite
“Absence of contact between the
maxillary and mandibular incisors at
centric relation (Worms 1971).” Absence
of vertical overlap of incisors.
2. Posterior Open Bite
“Lack of contact between the posterior
teeth when the teeth are in centric
occlusion.”

6. Causes
1. Dental or Simple Open Bite.
When the basal skeleton is normal and the open bite is confined
to the teeth and alveolar processes.
2. Skeletal or Complex Open Bite.
Results from skeletal dysplasia, so severe that the alveolar
processes cannot cope to maintain occlusal stops.

7. Causes
1. Dental or Simple Open Bite
Heredity
Environmental
Mouth Breathing
Thumb Sucking
Tongue Thrusting
Iatrogenic

8. Causes
2. Skeletal or Complex Open Bite
Jaw rotation during growth.
Trauma.

9. Diagnosis
1. Extraoral
2. Intraoral
3. Cephalogram

10. Treatment
 Deciduous dentition or Mixed
dentition:
1. Habit control
2. Growth Modulation

11. Treatment
 Skeletal or Complex Open
Bite
1. Surgical Orthodontics
2. Orthognathic Surgery

12. THANK YOU