Craniomandibular disorders and masticatory muscle function

Abstract

The heading craniomandibular disorder covers a wide range of abnormal and pathologic conditions accompanied by orofacial pain and impaired mandibular function, the masticatory muscles and the temporomandibular joints being the structures most frequently involved. Prevalences of serve carniomandibular disorder accompanied by headache and facial pain urgently in need if treatment are 1–2% in children, about 5% in adolescents, and 5–15% in adults, with higher values in women than in men. With respect to physiology and ergonomics, masticatory muscles are comparable to other human skeletal muscles, e.g. of shoulder, neck and lower back. Therefore these muscles share pathogenesis, symptoms and signs of muscular disorders caused by prolonged, low‐level static contractions or intermittent isometric contractions at higher levels. Since the same elements of performance in the masticatory muscles are influenced by occlusal factors, they link the development of muscular fatigue, discomfort and pain to the dental occlusion. Furthermore, changes of the occulusal surfaces, e.g. due to dental treatment, may influence the performance of the masticatory muscles, and consequently with local muscular function.

Farklı Vertikal Yüz Yapısına Sahip Bireylerde Çiğneme Kas Aktivitesi: Elektromiyografik Çalışma

“…This fin--ding is consistent with the previous studies which found masticatory muscle activity is higher in deep-bite subjects (5,6,(27)(28)(29)(30)(31)(32)(33) and lower in open-bite subjects (34).…”

Evidence of Sex-specific Differences in Masticatory Jaw Movement Patterns

“…Furthermore, current theories of TMD etiology agree that muscle hyperactivity is probably the final common pathway leading to TMD pain symptoms (Rugh, 1981;Zarb and Mohl, 1988). Since TMD are more common in females (Locker and Slade, 1988;Huber and Hall, 1990;Bakke and M0ller, 1992;Krogstad et al, 1992;De Kanter et al, 1993;however, cf. Duckro et al, 1990;Glass et al, 1993), this means that sex-specific risk factors associated with oral function predispose women to developing TMD.…”

“…Duckro et al, 1990;Glass et al, 1993). Furthermore, there is evidence that TMD symptoms are precipitated or perpetuated by functional and parafunctional habits (Christensen, 1971;Trenouth, 1979;Davidson and Mohl, 1987;Klineberg, 1988;Rugh and Harlan, 1988;Schiffman et al, 1992;Bakke and M0ller, 1992;Krogstad et al, 1992; however, cf. Seligman and Pullinger, 1991).…”

“…For instance, temporomandibular disorders (TMD) are more prevalent in females (Locker and Slade, 1988;Huber and Hall, 1990;Bakke and M0ller, 1992;Krogstad et al, 1992;however, cf. Duckro et al, 1990;Glass et al, 1993).…”

Variation of Occlusal Contacts and Activity of Masticatory Muscles, In Relation to Increasing the Capacity of Movement of the Cervical Spine after Thrust Maneuver

“…The IMPACT index is affected by occlusal stability. There is an intimate connection between muscle activity and the amount of occlusal contacts [26,27], a greater contact area creates a better muscle activity [28]. This direct correlation between occlusal stability and muscle performance [29], can make us understand how this index can be a great help when researching the vertical dimension of the occlusion [14].…”