General Books publication date: 2009 Original publication date: 1917 Original Publisher: W.B. Saunders Notes: This is a black and white OCR reprint of the original. It has no illustrations and there may be typos or missing text. When you buy the General Books edition of this book you get free trial access to Million-Books.com where you can select from more than a million books for free. Excerpt: CHAPTER II THE TEMPOROMANDIBULAR ARTICULATION The temporomandibular joint is formed by the articulation of the condyle of the mandible with the glenoid fossa of the temporal bone. It is a compound joint, allowing elevation and depression of the mandible, forward and backward gliding, and also lateral motion. The condyle of the mandible is the rounded prominence surmounting the condyloid process. The condyle is broader in its lateral direction than anteroposteriorly, and is covered with articular cartilage. The glenoid fossa is a shallow depression in the temporal bone, situated just in front of the ear. It is bounded in front by a ridge -- the eminentia articularis -- and posteriorly by the tympanic plate of the temporal bone. The fossa is divided into an anterior portion and a posterior portion by the Glaserian fissure, which contains the processus gracilis of the malleus, and transmits the tympanic branch of the internal maxillary artery. The anterior part of the glenoid fossa is the articular portion. The posterior portion contains a process of the parotid gland. There are four ligaments connected with this joint, and also an interarticular fibrocartilage with two syn- ovial sacs. The ligaments are as follows: 1. Capsular ligament. 2. External lateral ligament. 3. Internal lateral ligament (sphenomandibular). 4. Stylomandibular ligament. The capsular ligament surrounds the joint and is attached above to the margins of the glenoid fossa, and below to the neck of the condyle. It also sends fibers in to blend with the interarticular fibrocartilage. The exte...
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