Morphology and Morphometry of the Acetabulum

Acetabulum kalca ekleminin medial bolumunde yer alan hemisferik sekilli bir cukurdur.Acetabulum on kenari’nin morfolojisi total kalca artroplastisi icin onemlidir. Acetabulumcapinin ve derinliginin bilinmesi acetabulum kiriklarinin cerrahi tedavisi icin degerlidir.Amac:Bu calismanin amaci acetabulum cerrahisinde ve dogumsal acetabulum displazisitanisinda deger tasiyan acetabulum derinligini, capini, aralarindaki iliskiyi ve acetabulum onkenarinin morfolojisini tanimlamaktir.Gerec ve yontem: Bu calisma 154 kalca kemiginde yapildi. Iki morfometrik ve birmorfolojik parametre degerlendirildi. Corpus ischii’ye en yakin acetabulum kenari ve iliakkemik on kenarinin acetabulum kenarini kestigi nokta arasindaki uzaklik acetabulum capiolarak adlandirildi. Acetabulum’daki en derin nokta ile acetabulum kenarlarina teget gecenyatay plan arasindaki dikey uzaklik acetabulum derinligiolarak adlandirildi. Acetabulumon kenari morfolojik olarakdegerlendirildi ve dort farkli gruphalinde (kavisli, acili, duz ve irreguler) siniflandirildi.Bulgular: Acetabulum on kenari 154 kemigin 71’inde kavisli (%46,1), 36’sinda duz (%23,3), 26’sinda koseli (%16,8), 21’inde irreguler (%13,6) olarak bulundu. Morfometrikolcumler olan acetabulum derinligi ve capi ortalama 29,49 ± 4,2 mm ve 54,29 ± 3,8 mmolarak bulundu ve iki parametre arasindaki korelasyon Pearson testi ile sinandi. Acetabulumderinligi ve capi arasinda pozitif ve anlamli korelasyon saptandi (r = 0,498, p < 0,001).Sonuc: Acetabulum derinligi, acetabulum capi ile iliskilidir. En fazla gorulen acetabulumkenari sekli kavisli’dir (%46,1). Bu bilgi kalca artroplastisi sirasinda, kalca eklemi kiriklarinintedavisinde ve konjenital kalca eklemi displazisi tanisinda yararli olabilir. Key words: Acetabulum, morfometri, morfoloji, acetabulum on kenariAcetabulum is a hemispherical cavity on the medialpart of the hip joint (1). Anterior acetabular ridgemorphology is important in total hip arthroplasty. It isvaluable to know the diameter (AD1) and depth (AD2) ofthe acetabulum for surgical treatment of acetabularfractures. Previous studies evaluated the anterioracetabular ridge’s morphology regarding whether there isproportion between the diameter and thickness of theacetabulum (2,3). Murphy studied on prehistorical NewZealand Polynesian hip bones and evaluated theusefulness of acetabulum diameter in determining thegender (4). Patriquin et al. studied correlations betweenAD2 and os coxae measures to determine the gender (5).Han et. al tried to determine the utility of severalacetabular parameters in acetabular dysplasia diagnosis(6). Aktas et al. described the acetabular dysplasiafrequency and normal hip joint morphometry in adultTurks (7). Govsa et al. described the anterior acetabularridge’s shape morphologically (8). Basaloglu et al.measured the vertical and transvers diameters ofacetabulum in both sexes comparatively (9). In this studywe aimed to determine the relationship betweenacetabular depth and diameter. Additionally to describethe anterior acetabular ridge’s morphology that can beuseful for diagnosing congenital acetabular dysplasiadiagnosis and during acetabular surgery.MATERIAL AND METHODSThis study was held on 154 os coxae. Twomorphometrical and one morphological parameters wereevaluated. 0.1 mm. sensitive compass was used formorphometric measurements. Correlation betweenparameters were analysed using Pearson’s correlationtest. p < 0.05 was the significant level. The distanceFigure 1. The distance between the acetabular ridge nearest tocorpus ischii and anterior iliac margin intersecting the acetabularridge (acetabular diameter) (AD1)