Chapter 10: Orofacial Pain and Diseases Affecting the Temporomandibular Joint Ibsen: Oral Pathology for the Dental Hygienist, 7th Edition MULTIPLE CHOICE 1. The temporomandibular joint (TMJ) is the articulation between the condyle of the mandible
and the a. zygomatic process of the temporal bone. b. glenoid fossa of the temporal bone. c. external acoustic meatus. d. spine of the sphenoid bone. ANS: B
The TMJ is the articulation between the condyle of the mandible and the glenoid fossa of the temporal bone. It is a highly specialized joint that differs from other joints because of the fibrocartilage that covers the bony articulating surfaces, its ginglymoarthrodial movement, its function and overall health being dictated by jaw movement, and its dependence on the contralateral joint. The TMJ is the articulation between the condyle of the mandible and the glenoid fossa of the temporal bone rather than the zygomatic process of the temporal bone. The TMJ is the articulation between the condyle of the mandible and the glenoid fossa of the temporal bone rather than the external acoustic meatus. The TMJ is the articulation between the condyle of the mandible and the glenoid fossa of the temporal bone rather than the spine of the sphenoid bone. REF: Anatomy of the Temporomandibular Joint, page 306
OBJ: 1
2. Which statement about the articular disc in the TMJ joint is true? a. It is attached to the anterior and posterior aspects of the condyle. b. It is attached to the inferior belly of the medial pterygoid muscle. c. The disc is highly vascular. d. The disc is surrounded and protected by the fibrous connective tissue joint capsule. ANS: D
The disc is surrounded and protected by the fibrous connective tissue joint capsule. The articular disc in the TMJ is attached to the lateral and medial rather than the anterior and posterior aspects of the condyle, to the superior belly of the lateral pterygoid muscle, and to the joint capsule. The articular disc in the TMJ is attached to the lateral and medial aspects of the condyle, to the superior rather than the inferior belly of the lateral pterygoid muscle, and to the joint capsule. The disc and the bony surfaces are avascular. REF: Anatomy of the Temporomandibular Joint, page 307
OBJ: 1
3. During opening of the jaw a. rotational movement precedes translation. b. rotational movement follows translation. c. only rotational movement occurs; translation occurs only during closure. d. only translational movement occurs; rotation occurs only during closure. ANS: A
