Clinical trial NCT05637372: Relationships Between Anterior and Condylar Guidance - Comparison by CBCT and Electronic Axiography
Official title: Complicated Relationships Between Anterior and Condylar Guidance and Their Clinical Implications- Comparison by Cone Beam Computed Tomography and Electronic Axiography - an Observational Cohort Cross-sectional Study.
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Temporomandibular Joint Disorders
Occlusion
Lead sponsor: Medical University of Gdansk
Sponsor class: OTHER
First posted: 2022-12-05
Enrollment: 30
Sex: ALL
Minimum age (years): 20
Maximum age (years): 24
Standard ages: ADULT
Observational model: COHORT
Time perspective: CROSS_SECTIONAL
Sampling method: NON_PROBABILITY_SAMPLE
Study population: primary care clinic

Brief summary: The aim of the following study was to investigate the existence of a statistically significant correlation between the incisal features (incisal guidance angle, interincisal angle, overbite, overjet), temporomandibular joint (TMJ) morphology and its function. The hypothesis was:

I. The protrusive movement of the mandible does correlate with the TMJ anatomy. II. The protrusive movement of the mandible does not correlate with the incisal features.

III. The position and relationship of upper and lower permanent incisors do not have a direct and significant effect on the TMJ morphology in young adults.

Detailed description: The study was based on anatomical and functional measurements of the parameters within the masticatory system. The study group was composed in a way that all the participants (age 20-24) had the temporomandibular joints fully developed and at the same time not yet modified by adaptive processes.

Eligibility criteria: Inclusion Criteria:

* 20-24 years old

Exclusion Criteria:

* history of trauma, orthodontic treatment or temporomandibular disorders

Primary outcomes:
measure: Sagittal condylar guidance angle during protrusion
timeFrame: evaluated within 24h from baseline visit
measure: Vertical height of the temporomandibular joint fossa
timeFrame: evaluated within 24h from baseline visit
measure: Sagittal condylar guidance angle on Cone Beam Computed Tomography
timeFrame: evaluated within 24h from baseline visit
measure: Features of the incisors
timeFrame: evaluated within 24h from baseline visit
Secondary outcomes:
Other outcomes:
Locations:
city: Gdańsk
country: Poland
facility: Dental Sense Medicover
state: Województwo Pomorskie
Study officials:
affiliation: Dental Sense Medicover, 80-283 Gdańsk, Poland
name: Łukasz Lassmann, DDS
role: STUDY_DIRECTOR
References:
citation: Prasad KD, Shah N, Hegde C. A clinico-radiographic analysis of sagittal condylar guidance determined by protrusive interocclusal registration and panoramic radiographic images in humans. Contemp Clin Dent. 2012 Oct;3(4):383-7. doi: 10.4103/0976-237X.107419.
citation: Shreshta P, Jain V, Bhalla A, Pruthi G. A comparative study to measure the condylar guidance by the radiographic and clinical methods. J Adv Prosthodont. 2012 Aug;4(3):153-7. doi: 10.4047/jap.2012.4.3.153. Epub 2012 Aug 28.
citation: Dawson PE. Determining the determinants of occlusion. Int J Periodontics Restorative Dent. 1983;3(6):8-21. No abstract available.
citation: Han S, Shin SM, Choi YS, Kim SY, Ko CC, Kim YI. Morphometric analysis for evaluating the relation between incisal guidance angle, occlusal plane angle, and functional temporomandibular joint shape variation. Acta Odontol Scand. 2018 May;76(4):287-293. doi: 10.1080/00016357.2017.1420227. Epub 2018 Jan 11.
citation: Luca, L.; Manfredini, D.; Arveda, N.; Rossi, L.; Siciliani, G. A Cone-Beam Computerized Tomography Assessment of the Relationship between Upper Incisors Inclination and Articular Eminence Features in Orthodontically Untreated Patients with Different Facial Type. J World Fed Orthod 2016, 5 (2), 56-63. https://doi.org/10.1016/j.ejwf.2016.05.001
citation: Manfredini D, Lombardo L, Siciliani G. Temporomandibular disorders and dental occlusion. A systematic review of association studies: end of an era? J Oral Rehabil. 2017 Nov;44(11):908-923. doi: 10.1111/joor.12531. Epub 2017 Jul 2.