Impact of Twin Block and Motion Class II Appliances on Hyoid Bone Position - A Retrospective Clinical Study

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT06715774

Acronym

Hyoid bone

Enrollment

Registered

2024-12-04

Start date

2023-02-07

Completion date

2024-06-25

Last updated

2024-12-04

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

Conditions

Hyoid Bone

Keywords

Hyoid bone, twin block, motion,

Brief summary

Analyse the impact Twin block appliance and Motion on Hyoid Bone

Detailed description

Patients were selected, divided en two homogenous groups and underwent preoperative and postoperative lateral teleradiograph scans. The datasets were subsequently uploaded into a digital treatment planning software to record the position changes of the hyoid bone at horizontal, vertical, angular, and airway complex level; additionally, the effect of gender, age at onset, treatment time, biotype, and their interactions with the group, have been also statistically evaluated.

Interventions

DEVICEImpact of Twin Block and Motion above Hyoid bone

All patients were submitted to preoperative and postoperative lateral teleradiography (Vatech D052SB, Puteaux, France), with the following exposure parameters: 75KV, Intensity10mA, exposition times 11s28, 112,8 mAs, using the Frankfort plane as reference parallel to the floor; moreover, patients were required to avoid moving and swallowing. Afterwards, digital datasets were uploaded and aligned into a digital therapeutic planning software (Orthalis®, Orqualceph®,group orqual) to accurately record the position changes of the hyoid bone at horizontal, vertical, and angular level, according the gender, facial biotype and airway complex, by measuring the following anatomical references:

Study design

Observational model

OTHER

Time perspective

RETROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

10 Years to 16 Years

Healthy volunteers

Yes

Inclusion criteria

* 10 and 16 years old, with sketelal class II, a ANB angle ≥4° according to the Steiner cephalometric analysis, with Twin block or Motion appliance

Exclusion criteria

* without previous orthodontic treatment, without systemic disesases and adenotonsillar hypertrophy.

Design outcomes

Primary

Measure	Time frame	Description
Impact of Twin Block and Motion Class II Appliances on Hyoid Bone Position - A Retrospective Clinical Study	2023-2024	See the impact of twin block and motion on the hyoid bone

Countries

Spain

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026