indirect technique for assuring simplicity and marginal integrity of provisional restorations during full mouth rehabilitation

Full mouth rehabilitation with fixed prosthodontics can be a time- and labor-intensive process. The use of provisional restorations allows the treating clinician to determine the functional and esthetic requirements of the definitive prostheses. However, in the case of full mouth rehabilitation, the individual preparation of provisional restorations for multiple teeth may complicate the provisional phase and increase the treatment time. This article describes a method to simplify the indirect fabrication of provisional restorations for full mouth reconstruction. Provisional restorations may be easily achieved by splinting the provisional restorations in sextants, trimming them according to red pencil marks around the prepared margins as guidelines, and fitting them in the laboratory, utilizing a second set of solid casts for the prepared teet

Relationship between palato-radicular groove and periodontal health in maxillary lateral incisors

Palato-radicular grooves [PRGs] are developmental anomalies of the maxillary incisors teeth. The purpose of this study was to investigate the relationship between PRGs presence and periodontal health of maxillary lateral incisors in a selected sample of Saudi adults. A total of552 maxillary lateral incisors were examined in a group of 276 Saudi adults for the presence of PEG. The groove extension was categorized into coronal and apical grooves. The plaque index [PI], bleeding index [BI] and probing depth [PD] were recorded on six specific sites [three labial and three palatal] of the teeth examined. Chi square test was used to evaluate the association between the PRGs existence and presence of plaque and bleeding. Differences in PD between groups were analyzed using the unpaired-t-test. The PRG was observed in 10.3% of the sample. The lowest percentage of PI [80%] and BI [78%] were recorded in teeth without the PRGs. The percentages for PI and BI in teeth with the apical grooves were 100% for both parameters. 97% of teeth with the groove experienced bleeding on probing compare to only 78% of teeth without the groove. Teeth with apical grooves showed a statistically significant deeper probing depth compared to the teeth without the grooves. In conclusion maxillary lateral incisors with PRGs particularly those with apical extension of the groove were significantly associated with poorer periodontal health status manifested as more susceptibility for bleeding on stimulation and tendency to attain deeper probing depth in contrast to teeth without PRGs

Characteristics of newly-formed cementum following Emdogain application / 国际口腔科学杂志·英文版

Periodontal regenerative techniques have been proposed; however, the outcomes remain debatable. The present investigation assessed the regenerated cementum following enamel matrix derivative application in dehiscence-type defects. Buccal osseous dehiscences were surgically created on the maxillary cuspid, and the second and fourth premolars in five female beagle dogs. The treatment group (n = 15 sites) received the enamel matrix derived application, whereas the control groups (n = 15) did not. The dogs were sacrificed 4 months following treatment and the specimens were histologically and histometrically examined. The newly formed cementum was uneven in thickness and mineralization, overlapped the old cementum and exhibited functional orientation, cementocyte lacunae and collagen fibril bundles. Most of the histological specimens showed the presence of a gap between the newly formed cementum and the underlying dentin. Control sites did not exhibit any cementum formation. The present study concluded that newly formed cementum is of cellular type and exhibits multiple characteristics.

clinical evaluation of the bone grafting in the management of vertical osseous defects

Vertical osseous defects are those that happen when alveolar bone loss occurred in an oblique direction. Periodontal regenerative procedures using bone grafts are reported to be a feasible modality of periodontal therapy for management of periodontal vertical osseous defects. The objective of this study to evaluate and report the results of management of series of patients present clinically with vertical osseous defects and infrabony pockets using human autogeous and/or xenograft bone materials. Total of 10 vertical osseous defects and 28 sites with deep infrabony pockets [> 6 mm] clinically treated with regenerative osseous surgery using bone grafts. The following clinical parameters measured for the selected sites both presurgical and during follow up periods with an average of 6.8 months postsurgical: Probing Depth [PD], Recession [R] and Clinical Attachment Level [CAL]. The average PD reduction was 4.2 mm, the average amount of R increased postsurgical was 1.6 mm and the average amount of CAL gain was 2.6 mm. This study concludes that improved clinical attachment levels and pocket depth reduction may obtained after regenerative surgery using bone graft materials in the treatment of vertical osseous defects and infrabony pockets