The Angle of Gissane, or "Critical Angle", is the angle formed by the downward and upward slopes of the calcaneal superior surface. On a lateral radiograph, an angle of Gissane > 130° suggests fracture of the posterior subtalar joint surface.

2011-01-10 · In the paediatric study group, the mean Bohler's angle was 35.2 degrees (range 14.3 to 58.1 degrees) and the mean crucial angle of Gissane was 111.3 degrees (range 90.1 to 147 degrees).

The sample had a mean Bohler angle of 35.4° ± 5.9° and a mean crucial angle of Gissane of 110.5° ± 7.4°. This meta-analysis showed that there was no significant difference between the two groups regarding the Böhler angle (P = 0.44), Gissane angle (P = 0.06), calcaneal width (P = 0.09) and calcaneal height (P = 0.44) postoperatively and at the last follow-up. Bohler angle and the crucial angle of Gissane are used on the evaluation of calcaneus fractures. However, few authors have described the variation of the angles when the calcaneus is growing. Boehler and Gissane angles are the corner point for calcaneal fractures. Especially, Boehler angle (BA) is the predictor of this fracture type2-4. In 1931, Dr. Lorenz Boehler defined this angle as “tuber angle” with a normal range between 30°–35°.

Bohler's angle (also sometimes referred to as the "Tuber Angle") is formed by the intersection of lines 1 and line 2 on the lateral ankle radiograph. The normal range is 20 to 40 degrees. Angles < 20 degrees is suggestive of a calcaneus fracture and/or disruption of the posterior facet. The critical angle of Gissane (G) and the Boehler angle (B) have also been drawn in.

Boehler's angle and the critical angle of Gissane are of limited use in diagnosing calcaneus fractures in the ED Am J Emerg Med .

Cystic lesions at the angle of Gissane occur in 40% to 75% of patients [22, 23]. As with lipomas, patient age is not associated with the presence of a lesion.

The sample was mainly composed of two groups: 9 to 12 years of age (39%) and 13 to 16 years of age (31%). In the sample group, the mean Bohler angle was 35.4° ± 5.9° (95% confidence interval [CI]: 23.6°-47.2°) and the mean crucial angle of Gissane was 110.5° ± 7.4° (95% CI: 95.7°-125.3°). Gissane first described this critical or crucial angle in 1947.

Abstract. Study objectives: The aim of this study was to determine the use of Boehler's angle (BA) and the critical angle of Gissane (CAG) in diagnosing calcaneus fractures in the ED. Design: The study was conducted as a randomized, blinded, case-control trial.

Bohler's angle and Gissane's angle by either conservative or surgical method. angle and gissane angle during management of calcaneum fracture has its own crucial angle of Gissane. An angle directly inferior to the lateral process of the talus, formed by a line drawn along the posterior facet of the calcaneus and a line 12 Aug 2020 Gissane's crucial angle (GA) facilitates to diagnose calcaneal fractures, and serves as an indicator of the quality of anatomical reduction after Our data suggest that there is wide disagreement among surgeons regarding Böhler's angle and the crucial angle of Gissane in displaced intra-articular 1 Mar 2019 Most people think of the Böhler angle when considering calcaneal fractures but not me. The V created by the anterior and posterior facets is what 1 Apr 2019 Bohler's and Gissane's angles are subtended by the talar articular facet of the calcaneal bone.

Decreases. Image: Bohler's angle. Gissane's angle. Crticial angle of Gissane # calcenum > 130 degress = #. The “critical” angle of Gissane was devised on lateral radiographs to evaluate calcaneal fractures, as commonly the talar lateral process is driven downward into 10 Feb 2010 102 - Critical angle of Gissane. *In 1947, Gissane described his critical angle or crucial angle.
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However, both these methods of diagnosis are now considered obsolete and the same research that studied that utility of the angles found that Emergency Physicians were able to accurately identify calcaneal fractures approximately 98% of the time without the measurement of The Cobb angle is the most widely used measurement to quantify the magnitude of spinal deformities, especially in the case of scoliosis, on plain radiographs. Scoliosis is defined as a lateral spinal curvature with a Cobb angle of >10° 4. A Cobb 2016-08-10 · Critical Angle of Gissane: Measured on lateral radiograph, this “critical angle” is formed by the downward and upward slopes of the calcaneal superior surface. A normal angle of Gissane measures between 100 and 130 degrees, with a greater angle indicating fracture of the posterior subtalar articular surface. The operation increased Gissane angle of patients in Sanders II, III, and IV groups.

However, Calcaneal height was not significantly different between the 2 groups. Bohler and Gissane angle; to assess the loss of calcaneal inclination and in evaluating the involvement of the subtalar joint.3 Furthermore most intraarticular fractures involve the posterior articular facet of the subtalar joint, which is the major weight bearing portion of the human heel. *Corresponding author.
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The apex of the angle of Gissane is at the location of chronic talar impact with lateral hindfoot impingement, and this is the center of the bony changes, therefore the angle of Gissane, or “calcaneal angle” can be used as a term to identify the calcaneal location of pathology.

The angle is measured on lateral foot radiograph formed by the intersection of the lines drawn along the downward (posterior facet) and the upward (anterior process) slopes of the calcaneal superior surface. Explore iem-student.org's photos on Flickr. iem-student.org has uploaded 1032 photos to Flickr. crucial angle of Gissane. An angle directly inferior to the lateral process of the talus, formed by a line drawn along the posterior facet of the calcaneus and a line drawn from the anterior process to the sulcus calcaneus, and best seen on a lateral plain film of the calcaneus and hind foot.

difference (p>0.05) in the crucial angle of Gissane between the male and female donors (Male: 114.7 degrees compared with Female: 111.9; p>0.05) in the cadaveric study (Table 2). The crucial angle of Gissane was significantly larger in AALTF positive samples than in negative ones of educational bone samples (Graph 1).

Gissane's angle ADVERTISEMENT: Radiopaedia is free thanks to our supporters and advertisers. 102 - Critical angle of Gissane *In 1947, Gissane described his critical angle or crucial angle. *He noted a distinct angular cortical platform that parallels the lateral process of the talus on lateral radiographic projection.

Gissane's angle.