Zygomaticofacial, Zygomaticoorbital, and Zygomaticotemporal Foramina.

This study aimed to assess the anatomical and morphometric characteristics of the main zygomaticofacial (ZFF), zygomaticoorbital (ZOF), and zygomaticotemporal (ZTF) foramina in Brazilian dry skulls. 61, 69, and 42 skulls for ZFF, ZOF, and ZTF were evaluated by a single calibrated examiner for format, transverse and vertical diameters, and distances from the foramina to anatomical landmarks. Paired t test, Wilcoxon test, Pearson and Spearman correlations were used. Circular outline was the predominant format for ZFF and ZTF, while oval format was the most frequent for ZOF. Median distances from ZFF to frontozygomatic and zygomaticomaxillary sutures were higher on right and left sides of the skulls, respectively (P < 0.005). Mean ZOF transverse diameter was significantly higher on the right sides of the skulls and presented positive correlation between sides (P < 0.05). No differences were observed for mean vertical diameter and distance from the ZOF to the inferolateral angle of the orbit (P > 0.05). No significant difference was found for distance from the ZTF to zygomatic arch between sides (P > 0.05), although there was a positive correlation (P < 0.05). Significant differences were found when analyzing the anatomical and morphometric aspects of ZFF, ZOF, and ZTF.

Analysis of Anatomical Characteristics and Morphometric Aspects of Infraorbital and Accessory Infraorbital Foramina.

OBJECTIVE: This study aimed to perform a morphological and morphometric study of the characteristics of the infraorbital foramen (IOF) and accessory infraorbital foramen (AIOF) in Brazilian skulls. METHODS: A sample calculation determined a total of 94 human skulls to be evaluated by a trained examiner for number, shape, diameters, and location of IOF in relation to anatomical landmarks. Number, size, shape, diameters, location, orientation, position, and distances in relation to anatomical landmarks were evaluated for the AIOF. Descriptive analysis, paired t test, Wilcoxon test, Pearson and Spearman correlations were used. RESULTS: A total of 188 IOFs and 48 AIOFs were found. Circular outline was the predominant shape for both IOFs and AIOFs. Infraorbital foramens presented in left sides had a significantly greater transverse diameter and distance from medial margin of the orbit when compared with IOFs located on the right sides (P <0.001). Accessory infraorbital foramens were most frequently found on the left sides of the skulls and had a superomedial position in relation to the IOFs. Accessory infraorbital foramens located on right sides had a significantly greater distance to anterior nasal spine when compared with AIOFs located on the left sides (P <0.001). CONCLUSIONS: The results of this solid methodology-based study can help guide surgeons in accurately locating the IOF and AIOF, and consequently, their neurovascular bundles to perform safe procedures during maxillofacial interventions.

Styloid Process of the Temporal Bone: Morphometric Analysis and Clinical Implications.

Objective. To evaluate measures of the styloid process (SP) in Brazilian dry skulls. Methods. This study involves measurements of two points (lateral end posterior views) of 15 dry skulls held by the Morphology Department, Institute of Biological Sciences of Federal University of Minas Gerais. Results. There was a large variability for the length of left and right sides (in lateral and posterior views) of the styloid process. From the lateral view of the left and right styloid, the length of the SP ranged, respectively, from 10.22 mm to 69.73 mm and from 8.30 mm to 63.77 mm. From a posterior view of the left and right sides of the skulls, the values range, respectively, from 15.57 mm to 69.51 mm and from 15.64 mm to 69.44 mm. Conclusion. We believe that this study provides additional information about the frequency of elongated SP among the Brazilian population.

Comparison of cutaneous incisions to approach the infraorbital rim and orbital floor

Aim: The aim of this article was to retrospectively analyze and compare the esthetic outcomes achieved after the use of 20 subciliary incisions, 22 subtarsal incisions and 16 infraorbital incisions to approach the infraorbital rim and orbital floor in orbital fractures. Methods: The sample consisted of 58 patients (37 males and 21 females) with orbital trauma (floor and infraorbital rim) treated with open reduction and internal rigid fixation in the Department of Oral and Maxillofacial Surgery at “Hospital de Base do Distrito Federal”, Brazil, between September 1996 and August 2003. The following aspects were evaluated: (1) the average distance of the scars measured from the ciliary margin caudally, (2) the esthetic appearance of the scars, (3) chronic lid edema, (4) scleral show, (5) ectropion. Results: Subciliary incision demonstrated better surgical results when compared to the non-subciliary incisions. No statistically significant difference in chronic lid edema rates was found between the three groups of incisions (Fisher, p>0.217 in all cases). There was no statistically significant difference in ectropion, scleral show and chronic edema rates between the three groups of incisions. Conclusions: The subciliary and subtarsal incisions offer better esthetic results than the infraorbital incision.