Porus acusticus internus’un temporal kemiğin petroz parçasının arka yüzünde kapladığı alan


UNUR E. , ÜLGER H. , Ekinci N., ERTEKİN T. , NİSARİ M.

Erciyes Tıp Dergisi, vol.29, no.2, pp.106-109, 2007 (National Refreed University Journal)

  • Publication Type: Article / Article
  • Volume: 29 Issue: 2
  • Publication Date: 2007
  • Title of Journal : Erciyes Tıp Dergisi
  • Page Numbers: pp.106-109

Abstract

Abstract

Purpose: Internal acoustic meatus is about one cm length and opens near the center of

posterior surface of the petrous part of temporal bone. The aim of the study was to analyze

the occupation of porus acousticus internus in facies posterior of petrous part of temporal bone.

Material and Methods: In this study, 100 temporal bones of 50 dry skulls (unknown sex)

were examined. The areas of whole surface of the facies posterior of petrous part and porus

acousticus internus were calculated with the help of the Cavalieri principle. The ratio of the

porus acousticus internus to facies posterior was calculated. The posterior wall length of internal

acoustic meatus vertical and sagittal diameter of the porus were also measured.

Results: The ratio of area of the porus acousticus internus to facies posterior partis petrosa

was 4.82% on the right and 4.54% on the left. The length of the posterior wall was 15mm on

the right and 14 mm on the left. Vertical diameter was 4.51mm on the right and 4.55mm on

the left and sagittal diameter was 6.85mm on the right and 6.61mm on the left.

Conclusion: The measurement of the distances could be useful in guiding the degree of bony

removal for safety surgery.

Key Words:  Skull; Petrous bone; Temporal bone.

Özet

Amaç: Meatus acusticus internus yaklaþýk 1 cm uzunluðunda olup temporal kemiðin petroz

parçasýnýn arka yüzünün merkezine yakýn olarak açýlýr. Bu çalýþmanýn amacý porus acusticus

internus.un temporal kemiðin petroz parçasýnýn arka yüzünde iþgal ettiði alaný incelemektir.

Gereç ve Yöntem: Bu çalýþmada cinsiyetleri bilinmeyen 50 kuru kafatasýna ait 100 temporal

kemik incelendi. Porus acusticus internus.un ve petroz parçanýn arka yüzünün tüm yüzey alaný

Cavalieri prensibi yardýmýyla hesaplandý. Porus acusticus internus.un arka yüze oraný belirlendi.

Ayrýca meatus acusticus internus.un arka duvar uzunluðu, porus.un vertikal ve sagittal çaplarý

ölçüldü.

Bulgular: Porus acusticus internus.un alanýnýn petroz parçanýn arka yüzey alanýna oraný saðda

%4,82 solda ise %4,54.dür. Arka duvar uzunluðu saðda 15 mm, solda 14 mm olarak belirlendi.

Vertikal çap saðda 4,51 mm, solda 4,55 mm olarak belirlenirken sagittal çap ise saðda 6,85

mm, solda 6,61 mm tespit edilmiþtir.

Sonuç: Ölçülen bu mesafeler bölgeye yapýlacak cerrahi müdahalelerde ve meatus acusticus

internus duvarýndan uzaklaþtýrýlacak kemik miktarýný tespit etmede yararlý olabilir.

Anahtar Kelimeler:

 

Kafatasý; Temporal kemik; Petroz kemik