Clinical trial NCT05083715: The Impact of the Head Position on the Occlusion of Implant-supported Fixed Restorations
Official title: The Impact of the Head Position on the Occlusion of Implant-supported Fixed Restorations vs. Natural Dentition - a Cross-sectional Analysis
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Dental Occlusion
Keywords: dental occlusion
head posture
fixed dental restorations
dental implants
implant occlusion
computerized occlusal analysis
Lead sponsor: University of Belgrade
Sponsor class: OTHER
First posted: 2021-10-19
Enrollment: 31
Sex: ALL
Minimum age (years): 20
Maximum age (years): 55
Standard ages: ADULT
Accepts healthy volunteers: yes
Observational model: COHORT
Time perspective: CROSS_SECTIONAL
Sampling method: PROBABILITY_SAMPLE
Study population: Patients who refered to the Clinic for Prosthodontics due to the lack of one or more teeth that need to be replaced with dental implants and healthy completely dentate volunteers.

Brief summary: The development of a implantology leads to an increasing use of implants in the treatment of care for the loss of one or more teeth. The question is whether the existing guidelines, originally formulated for the occlusion of natural dentition and conventional prosthetic treatment can be applied to the implant prosthodonticsDue to initial differences in the vertical mobility of teeth and dental implants, present in the same dental arch, although the model of occlusion is ideal, undesirable premature occlusal contacts on the fixed dental restorations on implants may be present.

Objective: To evaluate the effect of different head positions on dental occlusion of the natural teeth and fixed dental restorations on implants.

Methods: Volunteers with complete dentition would be included in this study as the Control Group. The Study Group would include subjects with fixed dental restorations on implants in the transcanine region. A T Scan III System will be used for occlusal analysis.


Eligibility criteria: Inclusion Criteria:

For the Test Group

* patients with implant-supported fixed restorations in at least one quadrant of the posterior region (pre-molar and molar) of both jaws at least for 1 year
* patients with Angle Class I in MIP
* patients who did not have orthodontic treatment

For the Control group, the inclusion criteria were:

- patients with completely dentate arches (not considering third molars) with a maximum of 4 tooth-supported restorations per dental arch).

Exclusion Criteria:

* patients with bruxism, detrimental habits, and mandibular parafunctional activities
* patients with signs of temporomandibular dysfunction, trismus, or illness of the cervical spine
* patients with a history indicating problems with alcohol or drugs or receiving any psychiatric treatment.

Primary outcomes:
measure: Changes in occlusal contacts distribution in 3 different head positions
timeFrame: Baseline-1 year
measure: Changes in relative forces strength in 3 different head positions
timeFrame: Baseline-1 year
Secondary outcomes:
Other outcomes:
Locations:
city: Belgrade
country: Serbia
facility: Clinic for Prosthodontics, University of Belgrade Serbia
Study officials:
affiliation: Clinic for Prosthodontics, University of Belgrade Serbia
name: Ana R Todorovic, DDS,PhD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Goldstein G, Goodacre C, Taylor T. Occlusal Schemes for Implant Restorations: Best Evidence Consensus Statement. J Prosthodont. 2021 Apr;30(S1):84-90. doi: 10.1111/jopr.13319.
citation: Sadowsky SJ. Occlusal overload with dental implants: a review. Int J Implant Dent. 2019 Jul 23;5(1):29. doi: 10.1186/s40729-019-0180-8.
citation: Afrashtehfar KI, Qadeer S. Computerized occlusal analysis as an alternative occlusal indicator. Cranio. 2016 Jan;34(1):52-7. doi: 10.1179/2151090314Y.0000000024. Epub 2014 Oct 16.
citation: Chapman RJ, Maness WL, Osorio J. Occlusal contact variation with changes in head position. Int J Prosthodont. 1991 Jul-Aug;4(4):377-81.