The prevalence rate of Temporomandibular Disorders in patients that missing posterior teeth

Postgraduate Thesis uoadl:1315336 581 Read counter

Unit:
Κατεύθυνση Κλινική Αντιμετώπιση Στοματοπροσωπικού Πόνου (Κλινικές Ειδικεύσεις)
Βιβλιοθήκη Οδοντιατρικής
Deposit date:
2015-06-04
Year:
2015
Author:
Κουντούρης Αντώνιος
Supervisors info:
Δρούκας Βύρων, Τζάκης Μιχαήλ, Ψάρρας Βασίλειος
Original Title:
Ο επιπολασμός της δυσλειτουργίας του Στοματογναθικού Συστήματος σε ασθενείς με ελλείψεις οπισθίων δοντιών
Languages:
Greek
Translated title:
The prevalence rate of Temporomandibular Disorders in patients that missing posterior teeth
Summary:
Temporomandibular Disorder (TMD) refers to a cluster of conditions that affect
the temporomandibular joint and orofacial musculature. TMD can cause stiffness,
restricted mandibular movements, joint noises and orofacial pain. Orofacial
pain is an important factor directly associated with oral health-related
quality of life.
The prevalence rate of TMD is quite variable in the literature. Epidemiological
studies estimate that 40% to 75% of the population worldwide exhibit at least
one sign of TMD, such as joint noises, and 33% exhibit at least one symptom,
such facial or joint pain. A number of studies report a higher prevalence rate
in the female gender as well as peaks in adolescence and early adulthood.
The etiology of TMJ disorders remains unclear, but is likely multifactorial.
The literature reports possible risk factors, such as stress, anxiety, abnormal
occlusion, parafunctional habits (e.g., teeth grinding, teeth clenching, lip
biting), abnormalities of the intrarticular disk, trauma, hormonal factors,
genetic factors, social status, ethnicity and gender.
Additionally, the association between tooth loss and temporomandibular
disorders (TMD) remains controversial. Some authors have stated that losing
molar support was associated with the presence and severity of osteoarthritis
or with TMD. However, the majority of epidemiological, cross-sectional and
longitudinal clinical studies have shown that, in general, there are no
clinically significant differences between individuals with dental arches
shorthened 3 to 5 occlusal units and those with complete dental arches in terms
of signs and symptoms of TMD.
The aim of the present study is to investigate whether the number of missing
posterior teeth, their distribution, age, gender and educational status are
associated with TMD.
Material and Methods: Material comprised fifty individuals, aged >18- year-old
that were recruited from the Total Dental Care of Patients Clinic at the Dental
School in the University of Athens (UoA). Patients were divided into two equal
groups. Twenty-five of them were missing posterior teeth and the remaining
twenty-five were healthy dentulous indivuduals. All participants gave informed
consent to the procedures, which were approved by the Human Subjects Ethics
Committee of the Dental School at the UoA. Patients that agreed with the
consent form were examined according to the protocol of the Orofacial Pain
Management Clinic at the UoA. The severity of Temporomandibular Disorders was
categorized based on Clinical dysfunction index Di according to Helkimo.
Results: Six variables- Helkimo Index Di, gender, age, educational status, the
number of missing posterior teeth, and the number of dental quadrants with
missing posterior teeth- were analyzed with a logistic regression model. All
six variables were entered into the logistic model SPSS IBM, v21 for computers
(P<0.05). Patients missing posterior teeth on the lower left quadrant had a
statistically significant effect on TMD (P<0.003) as well as those that missing
posterior teeth on the lower right quadrant (P<0.022). The absence of 8
maxillary posterior teeth had a statistically significant effect on TMD
(P<0.010) as well as the absence of 8 mandibular posterior teeth (P<0.0001).
Conclusions: The results of the present study indicated that the demographic
variables (age, gender, educational status) of the sample did not appear to be
related to the severity of TMD. On the other hand, patients missing posterior
teeth on the lower left and on the lower right quadrants had a statistically
significant effect on TMD. Additionally, the greater the number of missing
posterior teeth in the mandible or/and in the maxilla, the greater the
statistically significant effect on TMD.
Keywords:
Temporomandibular disorders (TMD), Posterior teeth, Occlusion, Survey, Logistic regression analysis
Index:
No
Number of index pages:
0
Contains images:
Yes
Number of references:
136
Number of pages:
94
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