Die Ausrotation von Prämolaren und Eckzähnen mit NiTi-Elementen

Sander, Christian; Sander, Franz Martin; Sander, Franz Günter

doi:10.1007/s00056-006-5043-2

Cited by 12 publications

(18 citation statements)

References 2 publications

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“…A root surface of 220 mm 2 is specified for tooth 25 [37]. Accordingly, the appropriate torque for tooth 25 is around 15.8 Nmm, which is consistent with that reported by Sander et al [38] who measured torque during rotation of premolars and canines.…”

Section: Discussionsupporting

confidence: 69%

Effect of Aging of Orthodontic Aligners in Different Storage Media on Force and Torque Generation: An in vitro Study

Elshazly¹,

Nang²,

Golkhani³

et al. 2022

Preprint

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The aim of this study is to study the effect of aging in different media (deionized water and artificial saliva) on the force/torque generation by thermoplastic orthodontic aligners. Ten thermoformed aligners made of Essix ACE® thermoplastic sheets were aged in deionized water and in artificial saliva over two weeks at 37 C, five in each medium. The force/torque generated on upper second premolar (Tooth 25) of a resin model was measured at day 0 (before aging), 2, 4, 6, 10, and 14, using a biomechanical test set-up. The results showed that the thermocycling of aligners has no significant impact on their force/torque decay. No significant differences were also found in force/torque between the aligners stored in deionized water nor artificial saliva. The vertical extrusion-intrusion forces were measured in the range of 1.4 to 4.6 N, the horizontal oro-vestibular forces were 1.3 to 2.5 N, while the torques on mesio-distal rotation were 5.4 to 41.7 Nmm. It could be concluded that the influence of saliva on the mechanical properties can be classified as insignificant, and no significant difference between artificial aging in deionized water or artificial saliva was observed.

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Section: Discussionsupporting

confidence: 69%

Effect of Aging of Orthodontic Aligners in Different Storage Media on Force and Torque Generation: An in vitro Study

Elshazly¹,

Nang²,

Golkhani³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Torque of 30 Nmm [41] referred to a molar with an average root surface of about 430 mm 2 [42]. Tooth 25 has a root surface of 220 mm 2 [42], thus the appropriate torque is 10.5 -15.8 Nmm, as reported by Sander et al [43].…”

Section: Discussionmentioning

confidence: 99%

Effect of Thermomechanical Aging of Orthodontic Aligners on Force and Torque Generation: An <em>in vitro</em> Study

Elshazly¹,

Nang²,

Golkhani³

et al. 2023

Preprint

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The aim of the study is to investigate the effects of artificial aging by thermocycling and mechanical loading on force/torque delivery by thermoplastic orthodontic aligners. Ten thermoformed aligners made of Zendura™ thermoplastic polyurethane sheets were aged over two weeks in deionized water by thermocycling alone (n=5) and by both thermocycling and mechanical loading (n=5). The force/torque generated on upper second premolar (Tooth 25) of a plastic model was measured before aging (as control), and after 2, 4, 6, 10, and 14 days of aging, using a biomechanical set-up. Before aging, the extrusion-intrusion forces were in the range of 2.4 to 3.0 N, the oro-vestibular forces were 1.8 to 2.0 N, and the torques on mesio-distal rotation were 13.6 to 40.0 Nmm. Pure thermocycling had no significant effect on the force decay of the aligners. However, there was a significant decrease in force/torque after 2 days of aging for both thermocycling and mechanical loading aging group, which is no longer significant over 14 days of aging. In conclusion, artificial aging of aligners in deionized water with thermocycling and mechanical loading results in a significant decrease in force/torque generation. However, the mechanical loading of aligners has a greater impact than thermocycling alone.

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“…[20][21][22][23][24] MTBs with different brush head designs are still used most frequently today. 25,26 Despite extensive research, only one study could be found that could prove the superiority of a manual toothbrush over various electric toothbrushes. 27 ETBs often have the advantage that their brush head is small enough to clean areas that cannot be reached by toothbrushes with larger heads.…”

Section: Toothbrushesmentioning

confidence: 99%

“…Using an ETB is easier for many people to learn than using a MTB. 25,29 Interdental Brushes (IDB) are small brushes for cleaning the interdental space or the space between brackets, when instructed in between them, consisting of a wire core with nylon bristles arranged at an angle of 90°. IDBs with large diameters are particularly suitable for cleaning MBA.…”

Section: Toothbrushesmentioning

confidence: 99%

Orthodontists’ instructions for oral hygiene in patients with removable and fixed orthodontic appliances

Baumer,

Schmidtmann,

Ohlendorf

et al. 2023

Int J Dental Hygiene

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IntroductionThe aim of this questionnaire‐based survey was to evaluate information on frequencies, instructions and products relating to oral hygiene (OH) in orthodontic practices.MethodsUsing a computer‐generated randomization list, 1000 orthodontists were selected and sent a questionnaire. The size and number of inhabitants of the federal states of Germany were considered. The federal states with the highest return rate (Baden‐Wuerttemberg [BW], Bavaria [B], Hesse [H], Lower Saxony [LS], Nordrhein‐Westphalia [NRW]) were considered and differences between the 16 federal states were divided into North, South, East and Central Germany.ResultsThe response rate of the questionnaires was 52.4%. The majority (53.8%) worked in one practice alone. Most (59.1%) have been orthodontists for 5–25 years. For vestibular multibracket appliances (MBA) in BW, B, H and LS over 90% recommended interdental brushes (IDB). In NRW 91.4% recommend fluoride gel. In B and H more than 80% chose electric toothbrush (ETB), in BW, LS and NRW more than 80% manual toothbrush (MTB). For lingual MBA (LMBA) in BW, H, LS and NRW with approximately 50% each fluoride gel, IDB and MTB were chosen. In B fluoride gel, IDB and ETB. For removable apparatus (RA), five federal states recommended MTB (>80%) and ETB (BW, B, H > 80%; NRW > 70%; LS > 60%).ConclusionElectric toothbrushes are recommended for the use with all appliances, only with removable appliances manual toothbrushes are favoured. For vestibular MBA it is strongly advised to use IDB additionally.

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Die Ausrotation von Prämolaren und Eckzähnen mit NiTi-Elementen

Cited by 12 publications

References 2 publications

Effect of Aging of Orthodontic Aligners in Different Storage Media on Force and Torque Generation: An in vitro Study

Effect of Aging of Orthodontic Aligners in Different Storage Media on Force and Torque Generation: An in vitro Study

Effect of Thermomechanical Aging of Orthodontic Aligners on Force and Torque Generation: An <em>in vitro</em> Study

Orthodontists’ instructions for oral hygiene in patients with removable and fixed orthodontic appliances

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