Crista zygomaticoalveolaris
The zygomaticoalveolar crest is a bony ridge on both sides of the human upper jaw . It lies at the transition from the zygomatic bone ( Os zygomaticum ) to the upper jaw ( maxilla ) above the first molar (large molar). The two cristae zygomaticoalveolares are next to the front nose pillars ( Crista nasomaxillary ) and the pair of wings palate pillars ( Crista pterygomaxillary ) to the five vertical pillars of the midface . The zygomaticoalveolar crest forms part of the outer wall of the maxillary sinus ( sinus maxillaryis ) and the processus alveolaris maxillae (part of the bone in which the alveoli are located). The infraorbital foramen , through which the infraorbital nerve exits, lies cranially (above) the zygomaticoalveolar crest . The bone area in adults is around 1.5-2 cm 2 .
The exact anatomical structure of the zygomaticoalveolar crest has not yet been systematically recorded in any scientific work.
Oral surgical importance
The zygomaticoalveolar crest is prepared in the form of a bone flap as part of a sinus lift . It can also be used to a limited extent for obtaining intraoral bone grafts for augmentation of bone in oral surgical procedures. The zygomaticoalveolar crest was introduced in 2005 as an intraoral donor region. Particularly after tooth extraction , resorptions occur in the upper front tooth area in the area of the labial (lip-facing) lamella, which must be built up pre-implantologically . For such situations, the zygomaticoalveolaris crista, with its convex shape, offers the possibility of rehabilitation of the jugae alveolariae (protrusions of the bony tooth sockets ) without additional complex processing measures of a bone part otherwise intended for transplantation or later soft tissue structures.
In a LeFort I fracture , the bone continuity at the nostril and the zygomaticoalveolar crest is often palpably interrupted.
Individual evidence
- ↑ Insa Kristin Wiedemann, Die Crista zygomaticoalveolaris des Menschen with special consideration of its suitability as a donor region for the extraction of intraoral bone grafts , dissertation, Hannover Medical School 2014, digital version ( memento of the original from January 31, 2017 in the Internet Archive ) Info: The archive link was inserted automatically and not yet tested. Please check the original and archive link according to the instructions and then remove this notice. . Retrieved January 31, 2017.
- ^ DM Yates, HC Brockhoff u. a .: Comparison of intraoral harvest sites for corticocancellous bone grafts. In: Journal of oral and maxillofacial surgery: Official journal of the American Association of Oral and Maxillofacial Surgeons. Volume 71, number 3, March 2013, pp. 497-504, doi: 10.1016 / j.joms.2012.10.014 , PMID 23422150 .
- ^ Kai-Hendrich Bormann [alias Kai-Hendrik Bormann], C. Stühmer, Nils-Claudius Gellrich, Preimplantological Reconstruction of the Alveolar Process , Military Medicine and Military Pharmacy 2/2009. Retrieved January 31, 2017.
- ↑ Uwe Held, Kai Hendrik Bormann [alias Kai-Hendrik Bormann], Rainer Schmelzeisen, Nils-Claudius Gellrich, Augmentation of alveolar ridge defects: Autologous bone graft from the crista zygomaticoalveolaris - a new technique , Schweiz Monatsschr Zahnmed, Vol 115: 8/2005, p 693-699. Retrieved January 31, 2017.
