Featured Research

from universities, journals, and other organizations

First large-scale study of pain reveals risk factors

Date:
November 10, 2011
Source:
University at Buffalo
Summary:
Researchers have developed a comprehensive set of clinical characteristics that they say will lead to the ability to identify individuals at risk for developing painful jaw conditions.

Millions of Americans are affected by painful jaw problems known as TMD, temporomandibular disorders, but predicting who is at risk has been extremely difficult.

Now, for the first time, researchers in the University at Buffalo School of Dental Medicine are publishing a comprehensive set of clinical characteristics that they say will lead to the ability to identify individuals at risk for developing the painful conditions.

Their new clinical assessments will help researchers and clinicians better understand TMD and other pain conditions, so as to find ways to better manage and treat them.

Published in the November issue of the Journal of Pain, the UB research results are part of the Orofacial Pain Prospective Evaluation and Risk Assessment (OPPERA) study.

It is the largest clinical study of pain conditions and how they develop that has ever been done.

The UB researchers, led by Richard Ohrbach, DDS, PhD, associate professor of oral diagnostic sciences in the UB School of Dental Medicine, have been studying pain and TMD for several decades. Ohrbach is the lead author on the paper.

"The UB role in the project was to develop well-designed examination procedures to help dentists and other health care providers identify risk factors for TMD," says Ohrbach.

Ohrbach and his co-authors studied 71 different clinical variables in 1,633 controls -- individuals who never had TMD -- and in 185 people with chronic painful TMD.

They assessed the individuals through lengthy questionnaires about health histories and current symptoms and through clinical exams. Participants were from Western New York, Maryland, North Carolina and Florida.

The UB researchers found that a very high rate of the variables they assessed, 59 out of 71, were significantly associated with painful TMD.

"Our results indicate that individuals with TMD differ substantially from the controls across almost all of the variables we assessed," says Ohrbach.

TMD sufferers tended to have significantly higher levels of the following variables: trauma to the jaw, non-pain symptoms in the facial area, jaw locking and noises, and pain during such jaw movements as chewing, smiling or talking. Ohrbach notes that while the last two findings were clearly expected, very little has been known about the first two findings.

In particular, the UB researchers found that TMD sufferers reported a much higher rate of neural and sensory medical conditions, such as earaches, tinnitus or hearing loss, fainting and dizziness, as well as seizures due to epilepsy and other conditions.

Ohrbach said that the study also confirmed many findings that long have been associated with TMD but which have not, until now, been proven in a comprehensive, large-scale study.

Among these is the finding that any pain disorder, such as headache, backache and abdominal pain, is more likely to occur in TMD patients than in people who do not have TMD.

"Why are other pain disorders more common in people with TMD?" asks Ohrbach. "Is it because those pain conditions predispose them to develop TMD or do they develop TMD first and does TMD lead them to then develop other pain disorders?"

To answer these and other related questions, Ohrbach says he and his colleagues will next look at comorbidity.

"We'll be tracking these multiple pain disorders over time with particular variables," he says.

Ultimately, the findings of the UB researchers and their colleagues on the OPPERA study will be geared toward a better understanding of pain conditions in general.

"How do we understand the pain? How do we establish a reliable and clinically useful marker of pain so that significant pain can be more readily diagnosed?" asks Ohrbach. "To answer these questions, we need to have a model that puts all of the pieces together, that takes the findings from a clinical exam, puts it into a rigorous framework using the right assessment and diagnosis tools in order to chart the nature of multiple physical disorders so that we can ultimately understand how the pain is affecting the individual."

The OPPERA study was funded by the National Institute of Dental and Craniofacial Research.

Co-authors with Ohrbach on the paper are: Yoly Gonzalez of the UB Department of Oral Diagnostic Sciences; Roger B. Fillingim, University of Florida, College of Dentistry, North Florida/South Georgia Veterans Health System; Sharon Gordon, Department of Oral-Maxillofacial Surgery and Brotman Facial Pain Center, University of Maryland-Baltimore, Dental School; Henry Gremillion, Louisiana State University Health Sciences Center School of Dentistry; Margarete Ribeiro-Dasilva, Department of Community Dentistry and Behavioral Science, University of Florida, College of Dentistry; Joel D. Greenspan, Department of Neural and Pain Sciences, and Brotman Facial Pain Center; Charles Knott, Battelle Memorial Institute; and Pei-Feng Lim, William Maixner, Flora Mulkey and Gary Slade, all of the University of North Carolina-Chapel Hill.


Story Source:

The above story is based on materials provided by University at Buffalo. Note: Materials may be edited for content and length.


Journal Reference:

  1. Richard Ohrbach, Roger B. Fillingim, Flora Mulkey, Yoly Gonzalez, Sharon Gordon, Henry Gremillion, Pei-Feng Lim, Margarete Ribeiro-Dasilva, Joel D. Greenspan, Charles Knott, William Maixner, Gary Slade. Clinical Findings and Pain Symptoms as Potential Risk Factors for Chronic TMD: Descriptive Data and Empirically Identified Domains from the OPPERA Case-Control Study. The Journal of Pain, 2011; 12 (11): T27 DOI: 10.1016/j.jpain.2011.09.001

Cite This Page:

University at Buffalo. "First large-scale study of pain reveals risk factors." ScienceDaily. ScienceDaily, 10 November 2011. <www.sciencedaily.com/releases/2011/11/111110125957.htm>.
University at Buffalo. (2011, November 10). First large-scale study of pain reveals risk factors. ScienceDaily. Retrieved July 24, 2014 from www.sciencedaily.com/releases/2011/11/111110125957.htm
University at Buffalo. "First large-scale study of pain reveals risk factors." ScienceDaily. www.sciencedaily.com/releases/2011/11/111110125957.htm (accessed July 24, 2014).

Share This




More Health & Medicine News

Thursday, July 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Idaho Boy Helps Brother With Disabilities Complete Triathlon

Idaho Boy Helps Brother With Disabilities Complete Triathlon

Newsy (July 23, 2014) — An 8-year-old boy helped his younger brother, who has a rare genetic condition that's confined him to a wheelchair, finish a triathlon. Video provided by Newsy
Powered by NewsLook.com
Thousands Who Can't Afford Medical Care Flock to Free US Clinic

Thousands Who Can't Afford Medical Care Flock to Free US Clinic

AFP (July 23, 2014) — America may be the world’s richest country, but in terms of healthcare, the World Health Organisation ranks it 37th. Thousands turned out for a free clinic run by "Remote Area Medical" with a visit from the Governor of Virginia. Duration: 2:40 Video provided by AFP
Powered by NewsLook.com
Stone Fruit Listeria Scare Causes Sweeping Recall

Stone Fruit Listeria Scare Causes Sweeping Recall

Newsy (July 22, 2014) — The Wawona Packing Company has issued a voluntary recall on the stone fruit it distributes due to a possible Listeria outbreak. Video provided by Newsy
Powered by NewsLook.com
Huge Schizophrenia Study Finds Dozens Of New Genetic Causes

Huge Schizophrenia Study Finds Dozens Of New Genetic Causes

Newsy (July 22, 2014) — The 83 new genetic markers could open dozens of new avenues for schizophrenia treatment research. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins