Root parallelism in Invisalign® treatment
| dc.contributor.author | Nemes, Jordan | |
| dc.contributor.examiningcommittee | Hechter, Frank (Orthodontics: Preventive Dental Science) Piedade, Luis (Orthodontics: Preventive Dental Science) Todescan, Reynaldo (Restorative dentistry) | en_US |
| dc.contributor.supervisor | Hechter, Frank (Orthodontics: Preventive Dental Science), Piedade, Luis (Orthodontics: Preventive Dental Science), Todescan, Reynaldo (Restorative dentistry) | en_US |
| dc.date.accessioned | 2016-04-22T18:36:10Z | |
| dc.date.available | 2016-04-22T18:36:10Z | |
| dc.date.issued | 2015 | |
| dc.degree.discipline | Preventive Dental Science | en_US |
| dc.degree.level | Master of Science (M.Sc.) | en_US |
| dc.description.abstract | AIM: To assess root parallelism after Invisalign® treatment. MATERIALS AND METHODS: The sample consisted of 101 patients (mean age: 22.7 years, 29 males, 72 females) treated non-extraction with Invisalign® by one orthodontist. Root angulations were assessed using the 4-point angulation tool (Dolphin imaging©); the long axes of adjacent teeth were traced, yielding a convergence/divergence angle. Acceptable root parallelism was assessed if the root angulation did not converge/diverge more than 7 degrees. Sites evaluated: between 1st molars and 2nd premolars, 2nd and 1st premolars, lateral and central incisors, and between central incisors in all four quadrants. The average change in mesio-distal root angulation was assessed between pre- and post-treatment panoramic radiographs. RESULTS: Paired t-tests were used to analyze the average change in mesiodistal root angulation. Statistically significant differences were obtained indicating a reduction in the convergence/divergence angles between teeth #16-15, #15-14, #11-21, #24-25, #25-26, #45-44, #42-41, #41-31, #31-32, and #34-35 (at p-value <0.05). The average change in root angulation was not affected (p>0.05) by age (Pearson correlation coefficient), gender, occlusion type (I, II, or III), or elastic use (unpaired, 2 sample t-test at p<0.05). Intra and inter-rater reliability for 20% of the studied sample was assessed using the interclass correlation coefficient 3 test. All measured areas except teeth #16-15, #26-25, and #36-35 yielded good ICC reliability scores above 0.7. CONCLUSION: Root parallelism was improved post-Invisalign® treatment in ten of the fourteen areas evaluated. Thus, Invisalign® may be an effective treatment modality in controlling root angulation in non-extraction cases. | en_US |
| dc.description.note | May 2016 | en_US |
| dc.identifier.uri | http://hdl.handle.net/1993/31259 | |
| dc.language.iso | eng | en_US |
| dc.rights | open access | en_US |
| dc.subject | Invisalign | en_US |
| dc.subject | Root | en_US |
| dc.subject | Parallelism | en_US |
| dc.subject | Orthodontic | en_US |
| dc.title | Root parallelism in Invisalign® treatment | en_US |
| dc.type | master thesis | en_US |