Amaç: Bifid mandibular kondil (BMK); etiyolojisi tam olarak bilinmeyen, genellikle asemptomatik ve radyografide tesadüfen saptanan nadir bir anomalidir. Bu çalışmanın 1. amacı; toplumda BMK sıklığını, unilateral/bilateral olma durumunu, derinlik ve yerleşimini (oryantasyonunu) belirlemektir. İkinci amacı ise mevcut sulkus derinliğinin yaş ile ilişkisini değerlendirmektir. Gereç ve Yöntemler: Yaşları 18-75 arasında değişen 565 (%55,4)'i kadın, 455 (%44,6)'i erkek 1.020 hastanın konik ışınlı bilgisayarlı tomografi görüntüleri retrospektif olarak değerlendirildi. Koronal kesitlerde medio-lateral, sagittal kesitlerde ise antero-posterior oryantasyon araştırıldı. Belirlediğimiz BMK'lerin, bu araştırmaya konu edilen tüm verileri kaydedildi ve istatistiksel analizleri yapıldı. Ayrıca BMK tespit edilen hastalar, 6 farklı yaş grubuna ayrılarak sulkus derinliği ve BMK sıklığı açısından karşılaştırıldı. Bulgular: Bu çalışmada ortalama yaşı 49,4±13,2 [standart sapma (SS)] olan 20 (%3,54) kadın ve 21 (4,61) erkek 41 (4,02) hastada, 33 (%3,23) unilateral (16 sağ, 17 sol) ve 8 (%0,78) bilateral toplam 49 (%3,14) BMK belirlendi. BMK'lerin tümü medio-lateral oryantasyon sergilerken, bunların 16 (%32,65)'sı aynı zamanda anteroposterior oryantasyonluydu. Antero-posterior BMK'lerin ortalama sulkus derinliği 2,7±0,9 (SS) mm iken, medio-lateral oryantasyonluların ortalaması 2±0,4 (SS) mm idi (p>0,05). Cinsiyetler ve yaş grupları arasında BMK sıklığı ve derinliği açısından istatistiksel olarak anlamlı fark yoktu (p>0,05). Sonuç: Çalışmanın sonuçları; toplumda BMK sıklığının %4,02 olduğunu, bunların çoğunlukla medio-lateral oryantasyonlu ve unilateral gözlendiğini gösterdi. Ayrıca BMK sıklığı ve derinliği, yaş grupları ve cinsiyetler arasında farklılık göstermemekteydi.
Anahtar Kelimeler: Mandibular kondil; konik ışınlı bilgisayarlı tomografi; konjenital anomaliler
Objective: Bifid mandibular condyle (BMC); it is a rare anomaly with exactly unknown etiology, generally asymptomatic and detected incidentally on radiography. The primary aim of this study is to determine the frequency, unilateral/bilateral status, depth, and the location (orientation) of BMC in the community. The second aim is to evaluate the relationship between the existing sulcus depth and age. Material and Methods: Cone beam computed tomography images of 1,020 patients 565 (55.4%) female, 455 (44.6%) male) aged between 18-75 were evaluated retrospectively. Medio-lateral orientation in coronal sections and antero-posterior orientation in sagittal sections were investigated. All the data of the BMCs we determined were recorded and statistical analyzes were made. In addition, patients with BMC were divided into 6 different age groups and compared in terms of sulcus depth and BMC frequency. Results: In this study, in 41 (4.02%) patients as 20 females (3.54%) and 21 (4.61%) males, with a mean age of 49.4±13.2 [standard deviation (SD)] years, 33 (3.23%) unilateral (16 right, 17 left) and 8 (0.78%) bilateral a total of 49 (3.14%) BMCs were determined. While all BMCs exhibited medio-lateral orientation, 16 of them (32.65%) were also antero-posterior orientated. When the average sulcus depth of antero-posterior BMCs was 2.7±0.9 (SD) mm, the mean of those with medio-lateral orientation was 2±0.4 (SD) mm (p>0.05). There was no statistically significant difference between genders and age groups in terms of BMC frequency and depth (p>0.05). Conclusion: Results of the study; showed that the prevalence of BMC in the population was 4.02%, they were mostly observed in mediolateral orientation and unilaterally. In addition, BMC frequency and depth did not differ between age groups and genders.
Keywords: Mandibular condyle; cone beam computed tomography; congenital abnormalities
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