TY - JOUR
T1 - Effects of posterior teeth replacement on temporomandibular joint sounds
T2 - A preliminary report
AU - Barghi, Nasser
AU - Santos, Jose dos
AU - Narendran, Sena
N1 - Funding Information:
atient-reported or clinically detected clicking sounds in the temporomandibular joints (TMJs) are most frequently encountered when one i.s examining patients for temporomandibular joint disorders (TMDs).l-12 However, the significance of TMJ clicking in the absence of pain, dysfunction, and serious limitation of mandibular movements remains controversial. A number of studies?” have claimed that occlusal factors are related to TMDs. Some studies14,15 show that TMJ clicking may accompany other signs and symptoms of dysfunction. Histopathologic studies of human cadavers and one histopathologic study on rats suggest a correlation between the loss of posterior teetb and structural and histologic changes of the TMJ.13,15 The prevalence of TMJ clicking has been reported to be significantly higher in patients with missing posterior teeth.lm3 Qcclusal splints have been prescribed for patients with missing teeth and TMDs.17, I97 23-27 A hypothesis for such a therapeutic approach is that replacement of missing teeth provides stable support for the mandible, and reduces additional loading of the joint. However, the presumed association between loss of posterior teeth and clicking of the Supported by a grant from the American Equilibration Society. aProfessor and Head, Division of Occlusion, Department of Re-storative Dentistry. bAssociate Professor, Division of Occlusion, Department of Re-storative Dentistry. ‘Assistant Professor, Department of Community Dentistry. IO/I/37425
PY - 1992/7
Y1 - 1992/7
N2 - Previous reports have shown the prevalence of jaw clicking to be significantly higher in a population with missing posterior teeth compared with an dentulous population. This study presents a 2- to 5-year assessment of the effects of posterior teeth replacement on the amplitude of jaw clicking in subjects who were asymptomatic in all respects except jaw clicking. Patients requiring removable partial dentures (RPDs) were clinically and anamnestically examined and temporomandibular joint (TMJ) sounds were recorded using a modified stethoscope attached to an adjustable headgear. Amplified signals were displayed on a strip chart recorder. The amplitude of TMJ sounds at preinsertion of RPDs were 27.5 ± 17.7 dB at opening, and 11.1 ± 12.7 dB at closing. Similar values after prosthesis insertion were 15.8 ± 17.0 dB and 7.4 ± 7.5 dB, respectively. Pairedt test analyses showed significant differences in the amplitude of sound for opening and closing before inserting the prosthesis (p = 0.003) and for opening before and after treatment (p = 0.014). Following replacement of posterior teeth, the clicking amplitude decreased in 68% of recordings, remained unchanged in 11%, and increased in 21%.
AB - Previous reports have shown the prevalence of jaw clicking to be significantly higher in a population with missing posterior teeth compared with an dentulous population. This study presents a 2- to 5-year assessment of the effects of posterior teeth replacement on the amplitude of jaw clicking in subjects who were asymptomatic in all respects except jaw clicking. Patients requiring removable partial dentures (RPDs) were clinically and anamnestically examined and temporomandibular joint (TMJ) sounds were recorded using a modified stethoscope attached to an adjustable headgear. Amplified signals were displayed on a strip chart recorder. The amplitude of TMJ sounds at preinsertion of RPDs were 27.5 ± 17.7 dB at opening, and 11.1 ± 12.7 dB at closing. Similar values after prosthesis insertion were 15.8 ± 17.0 dB and 7.4 ± 7.5 dB, respectively. Pairedt test analyses showed significant differences in the amplitude of sound for opening and closing before inserting the prosthesis (p = 0.003) and for opening before and after treatment (p = 0.014). Following replacement of posterior teeth, the clicking amplitude decreased in 68% of recordings, remained unchanged in 11%, and increased in 21%.
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U2 - 10.1016/0022-3913(92)90301-P
DO - 10.1016/0022-3913(92)90301-P
M3 - Article
C2 - 1403903
AN - SCOPUS:0026888182
SN - 0022-3913
VL - 68
SP - 132
EP - 136
JO - The Journal of Prosthetic Dentistry
JF - The Journal of Prosthetic Dentistry
IS - 1
ER -