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Biomedical subjects

S Palla

Publications and source records attributed to S Palla.

68 records · Page 4Linked to original sources
PubMed1981

The effect of bite force on the duration and latency of the menton tap silent period.

The purpose of this research was to investigate the effect of bite force changes on the duration and latency of the menton tap silent period and particularly whether a decrease in bite force can increase the duration of the silent period to the extent which may be found in dysfunctional patients. The menton tap silent period was recorded from both anterior temporal and masseter muscles while the subject was clenching at different force levels. A bilaterally stable force transducer was used to monitor the clenching force. The results indicated no statistically significant differences in the mean durations and latencies of silent periods at different clenching forces. They suggest that duration and latency are not related to the degree of clenching force.

Adult↗
PubMed1977

[Interpretation and misinterpretation in occlusion diagnostic radiography of the temporomandibular joint].

Methodical procedure is of considerable importance in interpreting radiographs of the temporomandibular joint. Under this aspect the technique used at the Dental School of the University of Zurich, Department of Prosthodontics, is described. Two principal steps are distinguished for the evaluation of a radiograph: valuation and interpretation. In order to make clear radiographic anatomy and characteristics of projection of the joint region two didactic models are introduced. Problems, limits and pitfalls in interpreting radiographs of the temporomandibular joint in oblique lateral projection are shown.

Humans↗
PubMed1976

[A new device for the positioning of lateral teeth in complete dentures].

A new instrument for the arrangement of the posterior teeth in complete dentures is introduced. The instrument consists of a device to attach a transparent base-plate reproducing the morphology of the jaw to an articulator. During the set up the base-plate is fixed to the articulator at the level of the occlusal plane. So the morphological features of the edentulous jaw are three-dimensionally reproduced by the base-plate at the occlusal level. The advantage of the instrument is to allow a better, immediate and direct control of the occlusal configuration of the posterior teethe in relation to the morphology of the jaw.

Dental Instruments↗
PubMed1976

[A standard projection for temporomandibular joint radiographs in oblique lateral projection].

A standard projection for temporomandibular joint radiographs in oblique lateral transcranial projection was determined by a clinical method. The individualized projections from 1644 TMJ radiographs, made with a fluoroscopic examination unit with image intensifier, were evaluated in a pilot study. A mean projection 20 degree cranial eccentric and 12 degree dorsal eccentric resulted. Reference planes were the Camper plane and the middle frontal plane. This projection, corrected in 22 degree/10 degree, was studied in a clinical study in order to test the readability of the radiographs of 100 temporomandibular joints. The readability of these radiographs was compared with that of radiographs obtained with an individualized projection. 81 radiographs out of 100 were well or very well readable, 7 were limitedly readable and 12 were unreadable. The number of radiographs in these last two categories could not be reduced by an individual angulation of the x-ray beam. Therefore anatomical reasons have to be considered to be responsible for the insufficient readability of these TMJ radiographs. This projection avoided superposition of the petrous portion of the temporal bone without giving an extreme view of the lateral slope of the condyle. From the evaluation of the 100 individualized projections resulted a mean projection 21 degree/10 degrees, which confirmed the projection 22 degrees/10 degrees used in this study. The projection 21-22 degrees/10 degrees turned out to be a most favourable projection for the dental office to make TMJ radiographs in connection with the diagnosis of the occlusion in patients with TMJ disorders.

Adolescent↗
PubMed1976

[Problems of prosthetic treatment following preprosthetic measures in the maxilla].

The experiences with prosthetic treatment of the maxilla, following praeprosthetic surgery have been examined. It is of significance that this surgical intervention does not always result in a more favorable jawform and interalveolar relationship, factors which help determine the stability of the denture during mastication. The postoperative prosthodontic treatment of maxillary resorption remains problematical quite often becoming still more complicated because of additional problems in part undiagnosed by the dentist. Some of these problems and their solutions are discussed in a clinical case. The importance of denture stability during mastication independent of other retentive factors is emphasized as well as an occlusion coordinated with the "condyle in fossacentric" and the chewing strokes. The disregard of these stabilizing and retentive factors is too frequently the cause of praeoperative as well as postoperative failure in addition to contributing to accelerated residual ridge resorption.

Bone Resorption↗
PubMedDate not supplied

Cross-sectional association between markers of inflammation and serum sex steroid levels in the postmenopausal estrogen/progestin interventions trial.

BACKGROUND: Standard risk factors do not adequately capture cardiovascular risk in postmenopausal women. We sought to determine the associations between levels of sex steroids and levels of inflammatory markers in postmenopausal women. METHODS: We analyzed baseline data from a subset of postmenopausal women aged 45-64 years who had stored samples during a randomized controlled trial. We measured levels of C-reactive protein (CRP), interleukin-6 (IL-6), matrix metalloproteinase-9 (MMP-9), soluble intercellular adhesion molecule (sICAM), and circulating sex steroids. Multiple linear regression models were created with each of the following hormone levels as the primary exposure variable: estrone, total estradiol, bioavailable estradiol, total testosterone, bioavailable testosterone, progesterone, and sex hormone-binding globulin (SHBG). Sociodemographic and lifestyle covariates were derived from standardized self-report questionnaires and direct measurement (weight, height). RESULTS: Mean age of the 623 women was 56 years. After adjustment for age, body mass index (BMI), physical activity, alcohol consumption, and smoking, the bioavailable testosterone level (p = 0.03) was positively and the SHBG level (p < 0.001) was negatively associated with the logCRP level. The increment in CRP level between the highest and lowest quartile of bioavailable testosterone was 1.28 microg/mL. The increment in CRP level between the lowest and highest quartile of SHBG was 2.62 microg/mL. Compared with SHBG or bioavailable testosterone as predictors of logCRP in separate regression models, when both SHBG and bioavailable testosterone were included in the same multivariate linear regression model, only SHBG remained a statistically significant predictor of logCRP. Progesterone level was positively associated with the logMMP-9 level (p < 0.001); no other sex steroid level was associated with the logMMP-9 level. In multiply adjusted models, no association was found between levels of any sex steroid and IL-6 or sICAM level.

Alcohol Drinking↗