The Effect of Molar Incisor Hypomineralisation on the Stomatognathic System

Ozge Gungor

Status: Completed

Conditions: Molar Incisor Hypomineralization

Treatments: Diagnostic Test: Ultrasound and Shear Wave Elastography

Study type: Observational

Funder types: Other

Identifiers

NCT06951139

TBAEK-75

Details and patient eligibility

About

This study aims to examine whether children with Molar Incisor Hypomineralization (MIH) are more likely to have problems with the jaw joint and chewing muscles. MIH is a dental condition where the enamel of the first molars and incisors is weaker than normal. The researchers performed clinical examinations and ultrasound imaging to evaluate the thickness and elasticity of the chewing muscles. They also used a questionnaire to check for symptoms of temporomandibular disorders (TMD), such as jaw pain, headaches, and joint sounds.

Full description

This prospective clinical study investigates the potential impact of Molar Incisor Hypomineralization (MIH) on the stomatognathic system in children. MIH is a developmental enamel defect that affects the first permanent molars and incisors, resulting in weakened enamel and increased sensitivity. While MIH has been well documented in the context of dental health, its broader functional consequences remain underexplored. A total of 84 children aged 9-14 years participated in this study, including 43 with MIH and 41 healthy controls. The evaluation involved both clinical and ultrasonographic examinations. Temporomandibular disorders (TMD) were assessed using the Fonseca Anamnestic Index and through clinical parameters such as joint sounds, headaches, mandibular deviation/deflection, and mouth opening limitation. Ultrasound imaging, including shear wave elastography, was used to evaluate the thickness and elasticity of the masseter, temporalis, and sternocleidomastoid muscles, as well as the articular disc of the temporomandibular joint.

Enrollment: 84 patients

Sex: All

Ages: 9 to 14 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Children aged between 9 and 14 years
• Good general health with no systemic disease
• Score of 3 or 4 on the Frankl Behavior Rating Scale
• No parafunctional oral habits (e.g., bruxism)
• No skeletal orthodontic abnormalities
• For the MIH group: presence of at least one first permanent molar diagnosed with MIH
• For the control group: absence of MIH diagnosis

Exclusion criteria

• Presence of advanced periodontal disease or tooth mobility
• History of facial trauma or jaw fracture
• Current medication use
• Inability to cooperate during clinical or ultrasonographic examinations
• Any condition that may affect temporomandibular joint structure or function

Trial design

84 participants in 2 patient groups

MIH Group

Description:

This group includes children aged 9-14 years diagnosed with Molar Incisor Hypomineralization (MIH). Participants in this group underwent clinical and ultrasonographic evaluation to assess temporomandibular joint function and masticatory muscle properties.

Treatment:

Diagnostic Test: Ultrasound and Shear Wave Elastography

Control Group

Description:

This group includes healthy children aged 9-14 years without a diagnosis of Molar Incisor Hypomineralization (MIH). Participants were evaluated using the same clinical and ultrasonographic procedures as the MIH group.

Treatment:

Diagnostic Test: Ultrasound and Shear Wave Elastography