Investigation of the Relationship Between Mandibular Gonial Angle and Impacted Mandibular Third Molar

Yıl 2024, Cilt: 6 Sayı: 2, 192 - 199, 30.08.2024

Yiğit Ali Özkubat , Nesrin Saruhan , Yasin Koşar , Görkem Tekin , Ömür Dereci

https://doi.org/10.51122/neudentj.2024.102

Öz

Aim: The aim of this study is to investigate changes in the gonial angles of impacted lower third molars and associated parameters in individuals with impacted lower third molars aged twenty years and below.
Material and Methods: A retrospective study included 963 patients with impacted third molars. Impaction classification was done according to Pell-Gregory criteria. The teeth were divided into eight main groups based on their relationship with the ramus and second molar (1, 2, 3) and the depth within the bone (A, B, C). Teeth classified as erupted in 1A were excluded from the study. Gonial angle, mesiodistal distance (MDM), retromolar eruption distance (RED), retromolar eruption ratio (RER), A° (angle between the Gonion-symphysis plane and the long axis of the third molar), and B° (angle between the Gonion-symphysis plane and the long axis of the second molar) were evaluated. Panoramic radiographs were analyzed using specialized software to measure angles and distances. The angles and measurements were compared among impacted groups and genders. Statistical analyses including Pearson correlation and ANOVA tests were used to assess relationships between measurements and impact parameters. A significance level of p<0.05 was considered statistically significant.
Results: In females, the A was found to be significantly larger than in males (p<0.05). In males, however, RSM and RSO were found to be significantly larger than in females (p<0.05). There was no significant variation in gonial angle among the impaction groups. A angle was the narrowest in group 3/B and the largest in group 2/A.
Conclusion: While gonial angle are not a definitive indicator of impacted third molars, the study emphasizes the importance of A° and RED in predicting impaction.

Anahtar Kelimeler

third molar, Classification, Panoramic radiography

Mandibular Gonial Açı ile Alt Yirmi Yaş Diş Gömülülüğü Arasındaki İlişkinin Araştırılması

Öz

Amaç: Bu çalışmanın amacı, alt yirmi yaş dişlerine sahip bireylerde gömülülük gösteren dişlerin gonial açıları ve bu durumla ilişkili parametrelerdeki değişiklikleri araştırmaktır.
Gereç ve Yöntemler: Retrospektif olarak yapılan araştırmada gömülü üçüncü molar dişleri olan 963 hasta çalışmaya dahil edildi. Gömülülük sınıflaması Pell-Gregory kriterlerine göre yapıldı. Dişin ramus ve 2. molar ile olan ilişkisine göre (1,2,3) ve dişin kemik içerisindeki derinliğine (A, B, C) göre sekiz ana gruba ayrılmıştır.1A sınıflamasındaki dişler sürmüş kabul edilerek çalışma dışı bırakılmıştır. Gonial açı, meziodistal mesafe (MDM), retromolar sürme mesafesi (RSM), retromolar sürme oranı (RSO), A(Gonion-simfiz noktaları arasına çizilen düzlem ile 3. molar diş uzun ekseni arasındaki açı) ve B(Gonion-simfiz arasına çizilen düzlem ile 2. molar dişin uzun ekseni arasındaki açı) değişkenleri değerlendirilmiştir. Panoramik radyografiler özel bir yazılım kullanılarak açılar ve mesafeler ölçülerek analiz edildi. Açı ve ölçümler gömülü grupları ve cinsiyetler arasında karşılaştırıldı. Ölçümler ve etki parametreleri arasındaki ilişkileri değerlendirmek için Pearson korelasyonu ve ANOVA testlerini içeren istatistiksel analizler kullanıldı. İstatistiksel anlamlılık değeri p<0,05 olarak kabul edilmiştir.
Bulgular: Kadınlarda A açısı, erkeklere göre anlamlı olarak daha büyük bulunmuştur (p<0.05). Erkeklerde ise RSM ve RSO, kadınlara göre anlamlı olarak daha büyük bulunmuştur (p<0.05). Gömülülük grupları arasında gonial açı bakımından anlamlı değişim bulunamamıştır. A açısı 3/B grubunda en dar açı iken 2/A grubunda en büyük açıya sahiptir.
Sonuç: Gonial açı üçüncü molar dişlerin gömülü kalmasının kesin bir göstergesi olmasa da, çalışma A˚ ve RSM’nin gömülü kalmayı öngörmedeki öneminin altını çizmektedir.

Anahtar Kelimeler

Panoramik radyografi, sınıflama, üçüncü molar

Kaynakça

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