Mandibular Advancement Planning Based on Clinical Overjet

IRCCS Ospedale San Raffaele

Status: Not yet enrolling

Conditions: Class II Division 1 Malocclusion; Overjet

Treatments: Procedure: mandibular advancement with acrylic splint Herbst Appliance

Study type: Interventional

Funder types: Other

Identifiers

NCT06653075

OJ2024

Details and patient eligibility

About

This Prospective study aims to simulate the maximum mandibular advancement in class II patients treated by Herbst MTH Appliance on the base on clinical overjet.

Initial intraoral scans will be uploaded in Suresmile software, the upper incisors will be virtually aligned and the mandible will be advancement until an anterior occlusal contact will be reached. This virtual advancement will be compared to the real advancement obtained at the end of the Herbst phase.

This protocol will be applied to two groups: one with traditional dental occlusion, the second one with Skeletal anchorage reinforcement and elastic chains

Enrollment: 50 estimated patients

Sex: All

Ages: 6 to 50 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• ANB>=4°
• Overjet >=4 mm
• Class II malocclusion ( bilateral class II molar relation, at least half a cusp)

Exclusion criteria

• tooth agenesis
• poor oral hygiene
• previous orthodontic treatments
• systemic disease or bone pathology

Trial design

Primary purpose: Treatment

Allocation: Non-Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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50 participants in 2 patient groups

traditional anchorage

Active Comparator group

Description:

Skeletal class II patients treated by Herbst Appliance with traditional dental anchorage

Treatment:

Procedure: mandibular advancement with acrylic splint Herbst Appliance

skeletal anchorage

Experimental group

Description:

Skeletal class II patients treated by Herbst Appliance with skeletal anchorage

Treatment:

Procedure: mandibular advancement with acrylic splint Herbst Appliance