Leveling the curve of Spee with continuous archwire appliances in different vertical skeletal patterns: A retrospective study

Rozzi, Matteo; Mucedero, Manuela; Pezzuto, Chiara; Cozza, Paola

doi:10.1016/j.ajodo.2016.09.023

Cited by 35 publications

(32 citation statements)

References 24 publications

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“…The current study compared right and left sides of VSC values and results showed no significant difference in VSC depths, which is in agreement with the finding of studies by Marshall et al 2 and Veli et al 11 In the present study, the mesiobuccal cuspal area of lower first molar was the deepest part of VSC, which is in agreement with the findings of Veli et al…”

supporting

confidence: 93%

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Correlation between Von Spee’s Curve and Vertical Dental Eruptions in Class II Division-2 Malocclusion

Azeem¹,

Hamid²,

Haq³

et al. 2018

Orthod J Nepal

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Introduction: Von Spee's curve is one of the important treatment aspects in orthodontics. Any orthodontic treatment planning is dependent on this key factor.Objective: To find out the correlation between the Von Spee's curve and occlusal eruption of anterio-posterior teeth in Class II Division 2 malocclusion. Materials & Method:Current research was conceived at the Department of Orthodontics, de'Montmorency College of Dentistry and Faisalabad Medical University. Two hundred and fifty Class II Division 2 patients (112 male, mean age: 15.1±1.5 years; 138 female, mean age: 15.4± 1.3 years) were included. Depth of the curve was calculated on lateral cephalograms and dental plaster models, and correlated with the vertical eruption of lower incisal teeth and posterior mandibular molars. Result:The mesiobuccal site of mandibular first molar was the deepest part of Von Spee's curve, and vertical eruption of lower incisal teeth were more related to depth of Von Spee's curve as compared to vertical eruption of mandibular molars. Conclusion:Vertical eruption of the mandibular molar teeth make significant contribution to the depth of Von Spee's curve in Class II Division 2 malocclusion.

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supporting

confidence: 93%

“…According to Veli et al, 11 the curve of Spee depth in Class II Division 2 malocclusion was more associated with vertical eruption of mandibular posterior teeth. The current findings also showed similar correlation between the vertical eruption of posterior teeth and VSC depth in Class II Division 2 malocclusion.…”

mentioning

confidence: 94%

Correlation between Von Spee’s Curve and Vertical Dental Eruptions in Class II Division-2 Malocclusion

Azeem¹,

Hamid²,

Haq³

et al. 2018

Orthod J Nepal

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“…Literatürde bireylerin alçı model, dijital model, CBCT veya sefalometrik radyograf kayıtlarından faydalanarak vertikal yüz tipi ile çeşitli dişsel veya iskeletsel faktörlerin ilişkisini inceleyen çalışmalar mevcuttur. 23,[26][27][28][29] Su ve arkadaşlarının 23 şekilde, hiperdiverjan, optimum büyüme modeli ve hipodiverjan grupları arasında alt birinci molarlar arası genişlikte anlamlı bir fark olmadığı rapor edilmiştir.…”

Section: Bulgularunclassified

“…Rozzi ve arkadaşlarının26 90 birey üzerinde yaptığı çalışmada, vertikal iskeletsel sınıflar arasında SED ve overjet arasında istatistiksel olarak anlamlı bir fark yoktu. Bu yönüyle sonuçlar çalışmamızla benzerlik göstermekteydi.…”

unclassified

Farklı iskeletsel maloklüzyon tiplerinde derin Spee eğrisinin dentoiskeletsel karakteristiği

Akbulut¹,

Kim

2019

Acta Odontologica Turcica

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Dişsel faktörlerin derin Spee Eğrisi (SE) üzerindeki etkisini incelemek ve farklı sagittal ve vertikal iskeletsel maloklüzyon gruplarında SE karakteristiğini karşılaştırmaktır. GEREÇ VE YÖNTEM: Bu çalışmaya SE 3 mm'den derin olan toplam 184 Koreli hasta dahil edildi. Hastalar sagittal ve vertikal iskeletsel paternlerine göre ayrı ayrı sınıflandırıldı. Alçı modeller ve lateral sefalometrik filmler üzerinde Spee Eğrisi derinliği (SED), overjet, overbite, keserler arası açı, alt keser, alt kanin ve alt molarların mandibular düzlem ve mandibular oklüzal düzlem ile yaptıkları açı, alt keser ve kaninlerin mandibular düzlemden uzaklıkları, kaninler arası genişlik, premolarlar arası genişlik, molarlar arası genişlik ve ark uzunluğu parametreleri ölçüldü. Gruplar arasında değişkenlerin karşılaştırılması Tukey post-hoc testi ile birlikte varyans analizi ile yapıldı (α=0.05). BULGULAR: Derin SE, Sınıf 2'de keserlerin labioversiyonu, kanin ve molarların mezial angulasyonu ile; Sınıf 3'te ise kaninler arası genişliğin artması ve molarlar arası genişliğin artması, keserlerin linguoversiyonu, kanin ve molarların distal angulasyonu ile oluşmuştu. Her grup sagittal iskeletsel paterni doğrultusunda dişsel kompanzasyon gösterdi. Hipodiverjan grubunda derin SE; overbite fazlalığı, keserlerin labioversiyonu, kanin ve molarların mezial angulasyonu ile karakterizeydi. Optimum büyüme modeli ve hiperdiverjan gruplarının her ikisi de keser ve kaninlerde ekstrüzyon göstermekle birlikte hiperdiverjan grubu bunlara ilaveten keserlerde linguoversiyon göstermekteydi. SONUÇ: Farklı sagittal ve vertikal iskeletsel maloklüzyon gruplarında transvers ark genişliği, keserlerin inklinasyonu, kanin ve molarların angulasyonu, keser ve kaninlerin ekstrüzyon miktarları gibi dişsel faktörler SE karakteristiğine etki edebilir.

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“…7 In addition, a reverse curve was used to correct the deepbite, benefiting second molar intrusion and uprighting, since posterior extrusion was minimized by a "low-angle" patient and bite raising built on the posterior teeth. 8,9 It has been demonstrated that usual preadjusted appliance techniques may be efficient to control unwanted biomechanical side effects during molar uprighting. 10,11 In fact, the second molar's periodontal health was significantly improved, discarding occlusal interference sequels; the LAFH increased by 5.2 mm during treatment (11-14 years), whereas the mean increase of LAFH in untreated subjects is about 4.5 mm, 12 discarding the influence of molar uprighting mechanics on LAFH.…”

mentioning

confidence: 99%

Authors' response

Barros¹,

Janson²,

Chiqueto³

2018

American Journal of Orthodontics and Dentofacial Orthopedics

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deflection. In Figure 4, the torqued cantilever was pretwisted backward. After activation, the force applied would cause a deflection of the wire, which might result in rapid force reduction and then more frequent force application. Besides, stainless steel wires have high strength, high stiffness, low working range, and low spring-back properties. 2 Although the long cantilever favors reducing the load-deflection rate, chewing of food may cause stainless steel wires to deflect permanently. Therefore, a stainless steel wire cantilever with a counterclockwise helical loop or a TMA wire might be a better choice to reduce the force degradation during molar uprighting. However, the authors stated that "This dual deflection system of the skeletally anchored torqued cantilever with a longer cantilever arm further reduces the load-deflection rate and ensures uniformity of the cantilever force, making the use of helical loops and flexible metal alloys, such as titanium-molybdenum alloy, unnecessary." We would appreciate it if the authors could discuss this statement in detail. 4. Before uprighting the KMs, did the authors do any space analysis in the KM area? The authors mentioned that there was "arch-length shortening in the KM area." Moreover, it seems that the space between the distal surface of the second premolar and the anterior border of the ramus was less than the sum of the width of the KMs (our Fig 2) and the 1.5-mm per side per year growth. Therefore, the horizontally impacted second molar might be covered by the retromolar pad during the molar uprighting, as shown in Figure 5, D. Did the authors perform any periodontal surgery to prevent the potential risk?

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Leveling the curve of Spee with continuous archwire appliances in different vertical skeletal patterns: A retrospective study

Cited by 35 publications

References 24 publications

Correlation between Von Spee’s Curve and Vertical Dental Eruptions in Class II Division-2 Malocclusion

Correlation between Von Spee’s Curve and Vertical Dental Eruptions in Class II Division-2 Malocclusion

Farklı iskeletsel maloklüzyon tiplerinde derin Spee eğrisinin dentoiskeletsel karakteristiği

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