Association of anterior and posterior occlusal planes with different Angle and skeletal classes in permanent dentitions

Čelar, Aleš; Tafaj, Ekrem; Gráf, Alexandra; Lettner, Stefan

doi:10.1007/s00056-018-0139-z

Cited by 21 publications

(30 citation statements)

References 25 publications

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“…Dentoalveolar differences between Angle groups were irregular [4]. However, high correlation between the OP inclination for Angle class I and III groups was noticed.…”

Section: Discussionmentioning

confidence: 82%

Relationship Between Occlusal Plane Orientation and Sagittal Malocclusions: Study of an Orthodontic Population

Dallel

Kanoun

Nahdi

et al. 2021

Innovare J Social Sci

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Objective: The aim of this study was to evaluate the association of the skeletal pattern and angle class with the occlusal plane (OP). This study also examined the effect of orthodontic treatment on this plane. Methods: Lateral cephalometric radiographs of a sample of 135 patients were collected. The angles between the Frankfort horizontal, palatal plane (PP), mandibular plane (MP), and the OP were analyzed and compared between several groups and subsequently before and after treatment. Results: The statistical comparison between 3 skeletal frame groups demonstrates that the cant of the OP showed a major difference. This difference was greater in class III subjects. Examination revealed that the OP was not meaningfully affected within the Angle classification. Statistically, a significant correlation was found between OP steepness and the vertical skeletal pattern. A significant rise of OP/sella-nasion (SN) for class I (p=0.019) and II (p=0.015) after orthodontic treatment. In addition, patients treated with elastics showed a significant decrease of OP/MP (mandibular plane) in Angle class III and considerable increase of OP/SN and OP/PP in Angle class II. Observations of the group treated with bimaxillary extractions showed that OP/SN (sella nasion line) and OP/PP differ in a meaningful way. Conclusion: This study confirms the association between the skeletal pattern and the OP inclination in adults. Concerning the Angle classification, there was no significant difference between the groups. Orthodontic therapy had an influence on the inclination of this plane for the different malocclusions. Premolars extraction in class I cases significantly modified the OP. For class II and III malocclusions, the OP inclination was mainly altered by the use of intermaxillary traction elastics.

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“…Dentoalveolar differences between Angle groups were irregular [4]. However, high correlation between the OP inclination for Angle class I and III groups was noticed.…”

Section: Discussionmentioning

confidence: 82%

Relationship Between Occlusal Plane Orientation and Sagittal Malocclusions: Study of an Orthodontic Population

Dallel

Kanoun

Nahdi

et al. 2021

Innovare J Social Sci

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“…The advances in dentistry and malocclusion corrections for development of a healthy occlusion have led to an increased demand of orthodontic treatment. Malocclusion can vary depending on certain factors including the dental angle classification, skeletal classification and genetic factors [ 1 – 3 ]. Orthodontic movements vary depending on the degree of malocclusion, other biological factors such as age and suspected treatment planning [ 2 – 5 ].…”

Section: Introductionmentioning

confidence: 99%

Preliminary feasibility torque mechanical evaluation for 3D printed orthodontic springs with different parameters: in vitro study

et al. 2021

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Background The purpose of the presented investigation is to evaluate the resulting torque on loaded 3D printed springs using different coil thickness and length. Methods Specimens were designed and printed using the 3D printer MAX (Asiga, Sydney, Australia) with 3D printable, experimental, flexible material (Code:BM2008, GC, Tokyo, Japan). The specimens were divided into three groups according to spring coil design. Control group (n = 18), length group (n = 19) and thickness group (n = 22). Groups were tested using a Sauter Machine for torque calculation (DB, Grindelwald, Switzerland) in conjunction with a universal testing machine (Zwick Z010, Ulm, Germany) for clock-wise and anti-clockwise testing. Statistical analysis was performed using the Steel–Dwass test to compare median values of the three groups in both testing directions (p < 0.001). Results The highest torque value was determined in the thickness group for both clockwise and anti-clockwise testing directions, achieving 44.00 N/mm and 39.62 N/mm respectively. The length group ranged from 21.65 to 11.04 N/mm in clockwise direction and from 18.04 to 11.38 N/mm in counter-clockwise testing. The control group ranged from 22.72 to 17.18 N/mm in the clock-wise direction while in the anti-clock wise testing it ranged from 21.34 to 16.02 N/mm. Conclusions The amount of torque produced from the computer aided designing/computer aided manufacturing (CAD/CAM) springs is being affected by diameter more than the length design parameter in comparison to the control group. The values of the thickness group are significantly higher than those of the length group (P < 0.001).

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Section: Introductionmentioning

confidence: 99%

Torque Mechanical Evaluation for 3D Printed Orthodontic Springs with Different Parameters: Invitro Study

Othman¹,

Hartman

Ströbele

et al. 2020

Preprint

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Background: The purpose of the presented investigation is to evaluate the resulting torque on loaded 3D printed springs using different coil thickness and length. Methods: Specimens were designed and printed using the 3D printer MAX (Asiga, Sydney, Australia) with 3D printable, experimental, flexible material (Code:BM2008, GC, Tokyo, Japan). The specimens were divided into three groups according to spring coil design. Control group (n=18), length group (n=19) and thickness group (n=22). Groups were tested using a Sauter Machine for torque calculation (DB, Grindelwald, Switzerland) in conjunction with a universal testing machine (Zwick Z010, Ulm, Germany) for clock-wise and anti-clockwise testing. Statistical analysis was performed using the Steel-Dwass test to compare median values of the three groups in both testing directions (p<0.001). Results: The highest torque value was determined in the thickness group for both clockwise and anti-clockwise testing directions, achieving 44.00N/mm and 39.62N/mm respectively. For the thickness group values ranged from 21.28N/mm anti-clockwise to 44.00N/mm clockwise. The length group ranged from 21.65N/mm to 11.04N/mm in clockwise direction and from 18.04N/mm to 11.38N/mm in counter-clockwise testing. The control group ranged from 22.72N/mm to 17.18N/mm in the clock-wise direction while in the anti-clock wise testing it ranged from 21.34N/mm to 16.02N/mm. Conclusions: 3D printed springs are being affected by diameter than length as a design parameter compared to the control group. The thickness group values are statistically significant than the length group (P<0.001). Key words: CAD/CAM, 3D printing, Digital Orthodontics, Torque, Springs.

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Association of anterior and posterior occlusal planes with different Angle and skeletal classes in permanent dentitions

Cited by 21 publications

References 25 publications

Relationship Between Occlusal Plane Orientation and Sagittal Malocclusions: Study of an Orthodontic Population

Relationship Between Occlusal Plane Orientation and Sagittal Malocclusions: Study of an Orthodontic Population

Preliminary feasibility torque mechanical evaluation for 3D printed orthodontic springs with different parameters: in vitro study

Torque Mechanical Evaluation for 3D Printed Orthodontic Springs with Different Parameters: Invitro Study

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