Clinical trial NCT05647720: Effect of Maxillary Third Molar Extraction vs. Non-extraction on Distalization of First Molars in a Group of Adolescent Patients
Official title: Effect of Maxillary Third Molar Extraction vs Non-extraction on Distalization of First Molars in a Group of Adolescent Patients Using Infra-Zygomatic Gear Distalizer: A Randomized Clinical Trial
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Class II Malocclusion
Keywords: Infra-zygomatic mini-implant
Distalization
Infra-zygomatic crest
Digital models
molar tipping
Lead sponsor: Future University in Egypt
Sponsor class: OTHER
First posted: 2022-12-12
Enrollment: 22
Sex: FEMALE
Minimum age (years): 16
Maximum age (years): 19
Standard ages: CHILD
ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: TREATMENT

Brief summary: There is a scarcity in literature regarding the influence of maxillary third molar on distalization . This study aimed to compare the influence of unerupted maxillary third molars and their extraction on the bilateral distalization of upper first molars using the infra-zygomatic gear distalizer

Detailed description: Maxillary molar distalization is one of the non-extraction modalities for treating class II malocclusion. When distalizing maxillary molars In adults, it is not a problem to extract fully erupted third molars, and it may even be suggested that the extraction site may accommodate distalization. On the contrary, adolescents usually have unerupted third molars with partially formed roots, rendering the surgical extraction more difficult and traumatic. The necessity of surgically extracting upper third molar buds before distalization remains questionable. Therefore, this study was conducted to three-dimensionally assess the impact of maxillary third molar presence on distalizing maxillary molars in adolescent patients having Class II malocclusion.

Eligibility criteria: Inclusion Criteria:

* Adolescent patients aged 16-19 years
* skeletal Class I
* bilateral Class II molar relationship. defined by at least an end-to-end molar relationship.
* normal vertical growth pattern.
* full permanent dentition with unerupted upper third molars.

Exclusion Criteria:

* skeletal Class II or Class III relationship.
* past orthodontic treatment.
* poor oral hygiene.
* Increased vertical dimension.

Primary outcomes:
measure: distalization amount of maxillary firs molars at the crown and root levels
timeFrame: From pre to post distalization (an average of 8 months)
Secondary outcomes:
measure: Rate of maxillary first molar Distalization
timeFrame: From pre- to post-distalization (an average of 8 months)
measure: Tipping of maxillary first molar
timeFrame: From pre- to post-distalization (an average of 8 months)
measure: Vertical position of maxillary first molar
timeFrame: From pre- to post-distalization (an average of 8 months)
measure: Inter molar width
timeFrame: From pre- to post-distalization (an average of 8 months)
measure: Molar rotation
timeFrame: From pre- to post-distalization (an average of 8 months)
measure: Tipping of maxillary second molar
timeFrame: From pre- to post-distalization (an average of 8 months)
measure: Tipping of maxillary third molar
timeFrame: From pre- to post-distalization (an average of 8 months)
measure: Vertical position of maxillary third molar
timeFrame: From pre- to post-distalization (an average of 8 months)
measure: Vertical position of upper incisors
timeFrame: From pre- to post-distalization (an average of 8 months)
measure: Anteroposterior position of upper incisors
timeFrame: From pre- to post-distalization (an average of 8 months)
measure: upper incisors torque
timeFrame: From pre- to post-distalization (an average of 8 months)
measure: Anteroposterior changes of upper first and second premolars
timeFrame: From pre- to post-distalization (an average of 8 months)
Other outcomes:
Locations:
city: Cairo
country: Egypt
facility: Future University in Egypt
Study officials:
affiliation: Future University in Egypt
name: Yehya Mostafa, Professor and Chairman
role: STUDY_DIRECTOR
References: