Correlation in changes in the upper and lower incisor inclinations toward the nasolabial angle and mentolabial angle in non-extraction Class I malocclusion orthodontic treatment

Setiawan, Sona; Widayati, Retno; Sumardi, Sariesendy

doi:10.1088/1742-6596/1073/6/062002

Cited by 1 publication

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References 14 publications

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“…The third significant variable to direct the decisions is the nasolabial angle-"the angle formed between tangent to columella and tangent to upper lip" 17 . Extractions are normally prioritized for cases where the angle is acute and avoided when the angle is more obtuse.…”

Section: Discussionmentioning

confidence: 99%

Variables Associated with Clinical Decision Making in the Treatment of Class I Malocclusion Patients

2022

PJMD

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Background: To achieve treatment goals in orthodontics, the decision to extract or not extract premolars meets with debate. This includes cephalometric findings and study-cast analysis as influencing factors. This research aimed to identify variables that aid in clinical decision-making in the treatment of Class 1 malocclusion patients. Methods: This was a retrospective study conducted on pre-treatment records of Class I patients. All patients had a Class I dental and skeletal malocclusion. A sample of n=80 patients was included (40 extraction cases, 40 non-extraction). Cephalometric values and study-cast analysis for tooth-arch size discrepancy were performed and binary logistic regression was applied to run the univariate and multivariable analysis to investigate the association of different variables with extraction and non-extraction treatment. Odds ratio (OR) and 95% confidence intervals were reported and p <0.05 was considered statistically significant. Results: Univariate logistic regression showed that mandibular and maxillary crowding (p<0.001), overjet (p<0.001), SNGo (p= 0.01), nasolabial angle (NL) (p= 0.02), lower anterior facial height (LAFH) (p= 0.03) and upper lip in plane (ULE) (p= 0.05) had a significant association with the extraction and non-extraction groups. Hence, final multivariable logistic regression revealed that crowding (p< 0.01, 0.02), overjet (p= 0.009) and NL angle (p= 0.56) showed significant difference between the groups treated with and without extraction (p <0.05). Conclusion: The level of crowding in both the arches, the incisal overjet, and the nasolabial angle aid in the clinical decision-making for Class I malocclusion patients in choosing an extraction or non-extraction plan. Keywords: Extraction; Non-Extraction; Class I; Malocclusion; Patients; Orthodontics.

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Section: Discussionmentioning

confidence: 99%

Variables Associated with Clinical Decision Making in the Treatment of Class I Malocclusion Patients

2022

PJMD

View full text Add to dashboard Cite

show abstract

Correlation in changes in the upper and lower incisor inclinations toward the nasolabial angle and mentolabial angle in non-extraction Class I malocclusion orthodontic treatment

Cited by 1 publication

References 14 publications

Variables Associated with Clinical Decision Making in the Treatment of Class I Malocclusion Patients

Variables Associated with Clinical Decision Making in the Treatment of Class I Malocclusion Patients

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