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Title Weak Evidence Supports a Possible Correlation Between Mandibular Posturing for Sibilant Articulation and Abnormal Dental Occlusion
Clinical Question Is there a correlation between abnormal dental occlusion and mandibular posturing for sibilant articulation?
Clinical Bottom Line There is a correlation between mandibular posturing for sibilant articulation and abnormal dental occlusion.
Best Evidence (you may view more info by clicking on the PubMed ID link)
PubMed ID Author / Year Patient Group Study type
(level of evidence)
#1) 5222659Pound /1966Edentulous and partial edentulous patientsClinical Assertions/Historical Article (1966)
Key resultsDr. Earl Pound summarized seven related values to mandibular movement of speech. The main position he referred to during speech is the forward speaking position that is used when pronouncing the letter “s”. All of his assertions were based from his clinical experience when fabricating dentures with edentulous and partial edentulous patients. Depending on the occlusion classification, the outcome ranges from moderate to high from Pounds own patient pool.
Evidence Search (("Mandible"[Mesh] AND "Movement"[Mesh]) AND "Speech"[Mesh]) AND "Dental Occlusion"[Mesh]
Comments on
The Evidence
Pound’s sample patients were not assembled at a common point in the course of their disease. Some patients were fully edentulous and some were partially edentulous. Follow-up studies were not reported nor were there any objectives for this to be a blind study. Subgroups were formed depending on the occlusion classification. Adjustments for important prognostic factors and validation in independent test-set groups were made for the subgroups. Though the evidence is relevant to the clinical question, the evidence is weak. All of the assertions are unproven and a couple of them are dubious. One major deficiency in Pound’s work with edentulous patients is that his skeletal classification is made clinically rather than radiographically. When the residual ridge relationship is used to assign skeletal relations, it ignores the disparities in resorptive patterns secondary to the length of time edentulous, surgical trauma, and the role of OVD. Therefore, the patient can easily be incorrectly classified in Pound’s study.
Applicability The article was not specific on the age range, dental health, or medical health of the subjects studied. The patients were treated to have dentures and the patients were either edentulous or partially edentulous. This article is clinically important and has an impact on our conclusions since this article is the basis of today’s denture teeth placement. Thus, the article is strongly applicable to patients seeking prosthodontics treatment.
Specialty/Discipline (General Dentistry) (Prosthodontics)
Keywords Mandible, Mandibular Movement, Sibilant, Articulation, Dental Occlusion, Malocclusion, Speech
ID# 2128
Date of submission: 09/01/2011spacer
E-mail shaoj@uthscsa.edu
Author Jeff Shao
Co-author(s) e-mail
Faculty mentor/Co-author Stephan Haney, DDS
Faculty mentor/Co-author e-mail HANEYS2@UTHSCSA.EDU
Basic Science Rationale
(Mechanisms that may account for and/or explain the clinical question, i.e. is the answer to the clinical question consistent with basic biological, physical and/or behavioral science principles, laws and research?)
post a rationale
None available
Comments and Evidence-Based Updates on the CAT
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by Jonathan Hernandez and Marcos Trevino (San Antonio, Texas) on 11/28/2017
A PubMed search conducted in November 2017 revealed a more recent publication by Bulycheva et al. 2016 (PMID 27589658). An updated method of analyzing sounds before and after prosthodontic treatment was introduced in this randomized control study in which before and after spectral analysis of patients’ recorded pronunciation of fricative sounds helped guide prosthodontic treatment and evaluate the outcomes in terms of success.

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