Diagnostic value of bone sounding technique for estimation of level in periodontal defects

Alveolar bone level measurement in periodontal disease is very important because it may affect planning of forthcoming surgery, treatment response and prognosis. Surgical approach is the most accurate procedure for obtaining this measurement. Nowadays, transgingival probing as a non-invasive and accurate method has been claimed to be a proper substitution for surgical measurement and direct visualization. This study aimed at evaluation of diagnostic value of bone sounding technique in estimation of bone level in I, II and III-wall periodontal defects. Ninety vertical defects in 37 individuals with chronic periodontitis having one, two or three-wall defects were assessed. Bone levels were measured by UNC-15 probe. The resulted values were compared with the values obtained during surgery. Collected data were analyzed using Paired samples T test and Pearson's correlation coefficient. High and significant correlation was found between the results of transgingival probing and surgery methods [0.97, 0.94 and 0.95 in one, two, and three-wall defects respectively [p < 0.001]]. The mean bone levels measured by transgingival probing were 0.21, 0.53 and 0.19 mm less than their assigned values in surgery and there was no significant difference between one and three- wall defects [p < 0.001]. The findings of this study indicated a high correlation between the two procedures, bone sounding and surgery, in detection of bone level. Due to the negligible difference, it seems that trans gingival probing could be considered as a feasible replacement for invasive surgical approach in detection of alveolar bone level

[Evaluation of jaws dimension and occlusion of thalassemic children with permanent dentition in Tabriz children hospital]

beta Thalassemia is a hereditary hematologic disease with the manifestation of sever dental problems in affected patients. The aim of this study was to examine dental arch dimensions and occlusion in patients with beta-thalassemia in Children Hospital of Tabriz in 2005. The sample consisted of patients suffering from beta-thalassemia with mean age of 14.9 +/- 3.2 and an unaffected control group with mean age of 13.5 +/- 3.9. Impressions were made and measurements obtained with a Caliper. Over jet, Overbite and molar relation were recorded clinically. Statistical analysis was then performed using the two-tailed t-test and significance was set at p<0.05. In mandibular arch, when compared with thalassemic patients, healthy subjects showed a significantly larger incisor width, larger arch depth, and larger left and right anterior arch lengths. In the maxillary arch, statistically significant differences were found in mean incisor width, arch depth, intermolar width and left anterior arch length. The canine widths, premolar width, left and right posterior arch length and curve of Spee of both arches showed no statistically significant differences between the two groups. When compared to unaffected subjects, patients with beta-thalassemia exhibited a narrower maxilla, a shorter maxilla and mandible, smaller incisor width for the maxillary and mandibular arches