Digital Assessment of Mandibular Flexure in Full Arch Fixed Restorations

Retrospective Digital Study of Mandibular Flexure in Patients With Long-span Fixed Restorations Supported by Natural Teeth.

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT05617274

Enrollment

Registered

2022-11-15

Start date

2021-01-20

Completion date

2022-10-26

Last updated

2022-11-15

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Full Arch Fixed Prosthesis, Mandibular Flexure

Keywords

Mandibular flexure, Prosthesis Failure, Full arch restorations

Brief summary

Nine patients (five males and four females) were included in this study who had long-term (10-15 years) of long-span rigid mandibular fixed prostheses that may have led to radiographic changes around the supporting teeth. The treatment plans included the removal of the long-span fixed rigid prostheses followed by restoring the patients with segmented implant-supported prostheses. In order to digitally measure the mandibular flexure, reference markers were adhered to the prostheses, and intraoral scans were obtained before and after splitting the preexisting prostheses at the minimum and maximum mouth opening. The distances between the markers were measured, and mandibular flexure was calculated by subtracting the distance between the markers during the maximum mouth opening from the minimum mouth opening. An independent sample T-test was used to compare mandibular flexure before and after splitting the long-span fixed prostheses.

Interventions

PROCEDURESectioning of the full arch mandibular fixed prosthesis

The one unit full arch fixed prosthesis is sectioned at the midline into two pieces

Study design

Observational model

COHORT

Time perspective

RETROSPECTIVE

Eligibility

Sex/Gender

ALL

Healthy volunteers

Inclusion criteria

* full-arch mandibular single fixed prostheses that served for many years (average 12 years) opposed by natural dentition. * Patients were free from any systemic or debilitating diseases such as bone diseases, diabetes melilites, or blood dyscrasias.

Exclusion criteria

* patients with healthy fixed full-arch prosthesis * patients with segmented prosthesis * patients with systematic debilitating diseases. * Patients with temporomandibular joint dysfunction, maxillofacial surgeries, or mandibular trauma.

Design outcomes

Primary

Measure	Time frame	Description
change in mandibular flexure	immediately after the splitting of the full arch fixed prosthesis.	change in mandibular flexure before and after splitting of the fixed full arch prosthesis

Countries

Egypt

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 8, 2026