MSD Manual

Please confirm that you are a health care professional

Yes No
honeypot link
MSD Manual
Professional Version
The trusted provider of medical information since 1899
Medical Topics & Chapters
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
Professional /
Dental Disorders /
... /
Common Dental Disorders /

Common Dental Disorders

Expand all
Collapse all

MSD and the MSD Manuals

Merck & Co., Inc., Rahway, NJ, USA (known as MSD outside of the US and Canada) is a global healthcare leader working to help the world be well. From developing new therapies that treat and prevent disease to helping people in need, we are committed to improving health and well-being around the world.  The Manual was first published in 1899 as a service to the community. The legacy of this great resource continues as the MSD Manual outside of the United States and Canada. Learn more about our commitment to Global Medical Knowledge.



This icon serves as a link to download the eSSENTIAL Accessibility assistive technology app for individuals with physical disabilities. It is featured as part of our commitment to diversity and inclusion.
View Privacy Shield Verification Status
View APEC CBPR Privacy Certification Status

This website is certified by Health On the Net Foundation. Click to verify. This site complies with the HONcode standard for trustworthy health information:
verify here.

© 2022 Merck & Co., Inc., Rahway, NJ, USA and its affiliates. All rights reserved.