Clinical trial NCT05680103: Correlation Between Occlussion Types , in Patients With Temporomandibular Disorders.
Official title: Correlation Between Occlussion Types , in Patients With Temporomandibular Disorders. : A Cross Sectional Study
Study type: OBSERVATIONAL
Overall status: UNKNOWN
Conditions: Temporomandibular Disorder
Lead sponsor: Cairo University
Sponsor class: OTHER
First posted: 2023-01-11
Enrollment: 200
Sex: ALL
Minimum age (years): 16
Maximum age (years): 50
Standard ages: CHILD
ADULT
Accepts healthy volunteers: yes
Observational model: COHORT
Time perspective: CROSS_SECTIONAL
Sampling method: NON_PROBABILITY_SAMPLE
Study population: patients with TMDs and have teeth for dental occlussion

Brief summary: study to find if there is correlation between occlusion types and TMD or not

Detailed description: The relationship among occlusion, condylar position and temporomandibular disorders (TMDs) has been part of an extensive discussion in the dental field. There is a strong belief that the discrepancy between the centric relation (CR) and the intercuspal position (ICP) could predispose to the presence of TMDs . It was suggested in the past in the earlier studies that TMD is more common among the individuals who have Angle class II and class III , malocclusion , open bite , and cross bite . In the 1990s, studies suggested that some occlusal and skeletal characteristics as anterior open bite, unilateral posterior crossbite, overjet greater than 6-7mm, absence of five or more posterior teeth and CR to maximum intercuspation (MI) discrepancy greater than 2mm could be considered occlusal risk factors for TMDs . In their study, Oyetola et al. reported that 25% of the evaluated TMD patients had malocclusion Yet, recently with studies and systematic reviews , this idea ( alocclusion is the main cause of TMD) started to lose its support, and many studies showed that sensitivity to nociceptive stimulations and psychological factors are of more importance in the etiology of TMD

Eligibility criteria: Inclusion Criteria:

1. Patients above 16 years old and below 50
2. Patients with TMD diagnosed (stage 2 Wilkes classification , anterior disc displacement with reduction, )
3. Provided informed consent.
4. No history of systemic condition affecting TMJ
5. No previous orthodontic ttt

Exclusion Criteria:

1. Ear diseases.
2. History of facial trauma.
3. Neurological or oncological disease.

Primary outcomes:
measure: Prevalence of ADDwR in patients with class III malocclusion
timeFrame: baseline
Secondary outcomes:
measure: Prevalence of ADDwR in patients with class I and class II malocclusion
timeFrame: baseline
Other outcomes:
Locations:
Study officials:
References:
citation: Maizlin ZV, Nutiu N, Dent PB, Vos PM, Fenton DM, Kirby JM, Vora P, Gillies JH, Clement JJ. Displacement of the temporomandibular joint disk: correlation between clinical findings and MRI characteristics. J Can Dent Assoc. 2010;76:a3.
citation: Cai XY, Jin JM, Yang C. Changes in disc position, disc length, and condylar height in the temporomandibular joint with anterior disc displacement: a longitudinal retrospective magnetic resonance imaging study. J Oral Maxillofac Surg. 2011 Nov;69(11):e340-6. doi: 10.1016/j.joms.2011.02.038. Epub 2011 Jul 1.