Ponticulus posticus

Huang, Dageng; Hao, Ding-Jun; Fang, Xiangyi; Zhang, Chi; He, Bao-Rong; Liu, Tuan-Jiang

doi:10.1016/j.spinee.2015.06.040

Cited by 17 publications

(7 citation statements)

References 5 publications

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“…1,6,[16][17][18] Our results corroborate the findings from others studies in the literature, 1,16,18 with an observed prevalence of 25.7% PP in our studied sample. Previous authors 7 investigated the presence of PP from cone beam computed tomography (CBCT) and reported that the distribution of PP was higher in males (42.5%) than in females (36.6%).…”

supporting

confidence: 92%

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Associação Radiográfica entre Ponticulus Posticus e as Alterações Morfológicas Condilares

et al. 2017

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a ResumoO ponticulus posticus (PP) é definido como uma pequena ponte óssea formada entre a porção posterior do processo articular superior e a porção posterolateral da margem superior do arco posterior da vértebra atlas. A fisiopatologia do PP pode ser relatada pela compressão vascular da artéria vertebral e nervo suboccipital, levando a isquemia circulatória e dor de cabeça cervicogênica, ou por disfunção mecânica da articulação atlanto-occiptal, resultando no tracionamento da dura máter ou iniciando um processo neurodinâmico. O objetivo deste estudo foi avaliar a associação entre PP e alterações morfológicas condilares, por meio das radiografias panorâmicas e teleradiografia lateral. Foram selecionados 1200 pacientes que realizaram documentação ortodôntica em uma clínica de radiologia. O PP foi avaliado e classificado em parcial ou completo. Os dados foram tabulados no SPSS e analisados por regressão logística multinomial. Houve diferença estatística significativa na prevalência do PP parcial entre homens e mulheres (P< 0,001), com odds ratio de 1,91 (95% IC 1,34-2,71), e na prevalência do PP complete (P = 0,002), com odds ratio de 1,72 (95% IC 1,21-2,43). Diferença estatística também foi encontrada na associação entre alteração morfológica condilar e PP complete (P = 0,004). Concluiu-se que o PP é mais prevalente em homens e que existe correlação entre a presença do PP completa e alterações morfológicas condilares.Palavras-chave: Radiografia. Atlas cervical. Côndilo Mandibular. Abstract The ponticulus posticus (PP) is defined as an abnormal small bony bridge formed between the posterior portion of the superior articular process and the posterolateral portion of the superior margin of the posterior arch of the atlas. The pathophysiology may be related to

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confidence: 92%

“…4,5 Its prevalence has been reported to be between 5-38%, depending on the population and age group studied. 1,6,7 A range of factors including genetic factors, 8 ossification caused by age 1,9 or external mechanical factors, such as carrying heavy objects on the head, 10 have been suggested to be possible causes of PP formation.…”

Section: Introductionmentioning

confidence: 99%

Associação Radiográfica entre Ponticulus Posticus e as Alterações Morfológicas Condilares

et al. 2017

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“…It has been reported that the only advantage of this variation is the low risk of fracture, and it has also been reported that it usually leads to dissection by stretching the VA, vertebrobasilar ischemia during strong interventions in the cervical spine, complications in cases where C1-C2 stabilization is required, and Barre Lieou syndrome mostly by causing neurovascular compression (1,5,7,14,15,18,19,(22)(23)(24)(25)(26)(27).…”

Section: Discussionmentioning

confidence: 99%

The Importance of Arcuate Foramen, A Variation of the Atlas: A Microsurgical Cadaveric Study and Review of the Literature

Keser¹,

Çıkla²,

Özaydın³

et al. 2019

Istanbul Med J

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Amaç: Arkuat foramen (AF) atlasın posterior arkındaki vertebral arter (VA) oluğunda (sulkus arteriae vertebralis) bulunan, prevalansı bölgesel ve etnik faktörler nedeni ile değişebilen osseöz bir varyasyondur. AF'nin içindeki yapılara bası oluşturarak vertebrobaziler yetmezlik bulgularına neden olduğu düşünülse de bu kliniği açıklayacak yeterli sayıda kadavra çalışması yoktur. Yöntemler: AF varyasyonun insidansını ve içinden geçen VA ile olan ilişkisini değerlendirmek için renkli silikon enjekte edilmiş ve rastgele olarak seçilmiş 10 kadavranın 20 tarafı Wisconsin Üniversitesi Nöroanatomi Laboratuvarı'nda mikroşirürjikal yöntem ile incelendi. Bulgular: Örneklerin %30'unda atlasta komplet tipte AF varyasyonu saptandı. Bu varyasyon iki olguda sağda tek taraflı iken bir olguda bilateraldi. AF'nin ortalama boyutları sağda D1=6 mm, D2=5,5 mm, solda D1=7,5 mm, D2=6,5 mm, VA'nın ortalama çapı ise foramen öncesi, foramen içi ve foramen sonrası sırası ile sağda 4 mm, 2,5 mm ve 3 mm, solda 6 mm, 4 mm ve 5 mm idi. Olguların hepsinde suboksipital sinir AF içerisinde VA'ya eşlik ediyordu. Sonuç: Bu varyasyonun yüksek insidansının olabileceğinin bilinmesi kraniyoservikal bileşke ameliyatlarından önce ameliyat stratejisinin belirlenmesini ve hayati tehlike yaratabilecek arter yaralanmalarının engellenmesini sağlayabilir. Ayrıca, AF boyutlarının VA'nın rahatlıkla geçişine uygun olmasına karşın foramen içinden geçen diğer yapılar nedeni ile arteryel bası oluşturduğunun görülmesi foramen dekompresyonu ile olguların çoğunun rahatlama nedenini de açıklayabilir. Anahtar Kelimeler: Arkuat foramen, atlas, kadavra çalışması, osseöz anomali, vertebral arter, vertebrobaziler yetmezlik Introduction: Arcuate foramen (AF) is an osseous variation located on the vertebral artery (VA) groove (sulcus arteriae vertebralis) at the posterior arch of the atlas. Its prevalence may vary due to regional and ethnic factors. Although it is thought that it causes compression of the structures inside AF and causes vertebrobasilar insufficiency, there are not enough cadaver studies to explain this clinical condition. Methods: To evaluate the incidence of AF variation and its relationship with VA, 20 sides of 10 randomly selected and silicone injected cadaveric heads were examined by microsurgical method at the University of Wisconsin Neuroanatomy Laboratory. Results: Complete AF variation in atlas was detected in 30% of the samples. This variation was unilateral on the right side in two cases and bilateral in one case. The mean dimensions of AF were D1=6 mm and D2=5.5 mm on the right, and D1=7.5 mm and D2=6.5 mm on the left. The mean pre-foraminal, foraminal and post-foraminal diameters of VA were 4 mm, 2.5 mm and 3 mm, respectively, on the right, and 6 mm, 4 mm and 5 mm, respectively, on the left. In all cases, the suboccipital nerve was accompanying VA in the AF. Conclusion: Being aware that this variation may have a high incidence may help to determine surgical strategy before craniocervical junction surgery and prevent life-threatening arterial injuries...

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“…19 This bony arch is known as the PP 17 and is often bilateral 20 and can be divided into two types: partial (incomplete) and complete (Figure 2 and 3). 10,21 It was first reported by MacAlister 22 in 1893. Young et al 14 reported that putting a screw into PP during C1 lateral mass screw placement could cause injury to the vertebral artery.…”

Section: Anatomymentioning

confidence: 99%

Ponticulus Posticus: Is It Important for a Dentist as an Radiological Finding?

Taşsöker¹,

Özcan²

2017

Yeditepe J Dent

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SUMMARYDevelopmental anomalies of the atlas are of interest not only to anatomists but also clinicans, radiologists, surgeons, who should be aware of their distinct morphological manifestations as well as correlated clinical expressions. Dentists should look carefully for Ponticulus posticus (PP) because these abnormalities may be related to otherwise unexplainable head and neck pain, visual disturbances, problems with speech and swallowing, vertigo, vascular problems and other symptoms related to compression of the vertebral artery and suboccipital nerve. The aim of this paper, although the dentists especially oral and maxillofacial radiologists and orthodontists are not directly concerned with the management of cervical spine anomalies to sensitize them to realize the cervical spine and be equipped to identify differences from normal anatomy.

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Ponticulus posticus

Cited by 17 publications

References 5 publications

Associação Radiográfica entre Ponticulus Posticus e as Alterações Morfológicas Condilares

Associação Radiográfica entre Ponticulus Posticus e as Alterações Morfológicas Condilares

The Importance of Arcuate Foramen, A Variation of the Atlas: A Microsurgical Cadaveric Study and Review of the Literature

Ponticulus Posticus: Is It Important for a Dentist as an Radiological Finding?

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