Effects of the advanced mandibular spring on mandibular retrognathia treatment: a three-dimensional finite element study.
BMC Oral Health
; 22(1): 271, 2022 07 05.
Article
en En
| MEDLINE
| ID: mdl-35790937
ABSTRACT
BACKGROUND:
The Advanced Mandibular Spring (AMS) was newly developed as a dentofacial orthopedic appliance in conjunctive use of clear aligners to treat Class II malocclusion with mandibular retrognathia in adolescents. This study aimed to launch a biomechanical assessment and evaluate whether the stress patterns generated by AMS promote mandibular growth.METHODS:
A three-dimensional finite element model was constructed using images of CBCT and spiral CT. The model consisted of craniomaxillofacial bones, articular discs, retrodiscal elastic stratum, masticatory muscle, teeth, periodontal ligament, aligner and AMS. Mechanical effects were analyzed in three types of models mandibular postural position, mandibular advancement with AMS, and mandibular advancement with only muscular force.RESULTS:
The stress generated by AMS was distributed to all teeth and periodontal ligament, pushing mandibular teeth forward and maxillary teeth backward. In the temporomandibular joint area, the pressure in the superior and posterior aspects of the condyle was reduced, which conformed to the stress pattern promoting condylar and mandibular growth. Stress distribution became even in the anterior aspect of the condyle and the articular disc. Significant tensile stress was generated in the posterior aspect of the glenoid fossa, which conformed to the stress pattern stimulating the remodeling of the fossa.CONCLUSIONS:
AMS created a favorable biomechanical environment for treating mandibular retrognathia in adolescents.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Retrognatismo
/
Avance Mandibular
Límite:
Adolescent
/
Humans
Idioma:
En
Revista:
BMC Oral Health
Asunto de la revista:
ODONTOLOGIA
Año:
2022
Tipo del documento:
Article
País de afiliación:
China