PubMed · 8371187
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O Sykora. 1993. Jaw relation record evaluation with block teeth.. https://doi.org/10.1016/0022-3913(93)90021-f
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This article describes the use of three devices that replace the wax rims in the registration of the intermaxillary position and of the vertical dimension of occlusion in completely edentulous patients who have been treated with Brånemark implants. The devices consist of a mechanical "tooth" that can be adjusted in all three dimensions of space and of two plates that support the registration material. The mechanical tooth is connected to an abutment in the anterior region and a contact is established with a tooth in the opposite jaw at the vertical dimension in which the patient will be restored. This allows the operator to position the mandible in the centric relation in a condition of neuromuscular deprogramming and in the absence of posterior interferences. The two metal plates are then fixed to the posterior abutments, one on each side, and support the wax and zinc oxide eugenol paste used to register the intermaxillary position just established.
STATEMENT OF PROBLEM: A significant number of patients exist who are in need of prosthodontic rehabilitation and who at the same time report musculoskeletal pain in the facial area. PURPOSE: This article, which is based on an assessment of both the past and the most recent basic science and clinical literature, evaluates the effect of musculoskeletal facial pain on two static (physiologic rest position and centric relation) and two dynamic (protrusive border and lateral border movements) maxillomandibular relationships. MATERIAL AND METHODS: To find the relevant studies addressing the association between musculoskeletal facial pain and maxillomandibular relationships, a MEDLINE search was conducted, which was complemented by a hand search in selected journals. RESULTS AND CONCLUSIONS: Musculoskeletal facial pain seems to variably affect the aforementioned positions and movements. Hence, the validity of maxillomandibular registrations in patients with existing facial pain is questioned. In those patients with facial pain who simultaneously are in need of a prosthodontic rehabilitation, clinicians should be cautious with regard to the timing of the restorative procedures.
In this second of two articles, the role of occlusion and malocclusion is assessed with respect to orthodontics and temporomandibular disorders (TMD). Some have suggested that malocclusion may cause TMD, or that by introducing a form of malocclusion, orthodontic treatment could be iatrogenic. Pertinent evidence relating to these issues will be assessed.