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photogrammetric analysis of Multiple Implant Abutment Impressions under Different Conditions

Open Journal of Stomatology 2017年第9期7卷 408-418页

作者： Funda Bayindir Melike Pinar Yildirim Nuran Dinckal Yanikoglu Department of Prosthodontics Faculty of DentistryAtatürk UniversityErzurumTurkey Beyhekim Oral and Dental Healthy Center SelcukluTurkey

Purpose: The aim of this investigation was to evaluate and compare the dimensional accuracy of hydrophilic polysiloxane, vinyl polysiloxane (VPS), and polyether (PE) impression materials under dry, moist and wet conditions. Methods: An acrylic master model including 6 implants was formed, and 108 impressions were made up of this acrylic model at total. In this study, the materials of hydrophilic polysiloxane impression material, 1 hydrophilic vinyl polysiloxane impression material and 1 polyether impression material were tested. Twelve impression of each material were created under dry, moist and wet respectively. Two reference distances were evaluated on each study model by using a graphics-editing program whereas for comparison of mean dimensional changes one-way analysis of variance and Student t-test were used. Results: One-way analysis of variance revealed significant differences between impression materials and conditions (P P Conclusions: All impression materials showed a statistically significant difference under dry, moist and wet conditions.

关键词： photogrammetric analysis Implant Abutment Impressions

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Corelation Among Soft Tissue Points Namely Maxillary Point, Labrale Superius and Pronasale

Corelation Among Soft Tissue Points Namely Maxillary Point, ...

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作者： SHIVANI GARG 重庆医科大学

学位级别：硕士

Background and objectiveThe aim of the present study was to determine-using the10most recent annual listings of the most beautiful people inpeople’s magazine–whether any measurable esthetic parametercould be extracted from the interrelation among the position ofsoft tissue points namely Maxillary point, Pronasale and Labralesuperius with respect to each other.Materials and MethodsA total of80women, who had been included in the list ofPeople’s magazine,100most beautiful people during the previous10years, were selected from internet database. A modifiedphotogrammetric analysis was performed on the lateral view ofeach subject to obtain the proportional measurements. Thederived measurement was then applied to the lateral photographsof20Chinese female patients with pleasing *** andafter photographs were then judged by a panel of twentyorthodontists and60lay people for any positive improvement inprofile. ResultsResults of this study showed that when upper lip is positionedhorizontally such that its distance from maxillary point andpronasale is in ratio of1.18:1with a standard deviation of0.12,leads to a very esthetic profile.ConclusionIt reveals that prominence of maxillary point should be takeninto consideration while contemplating treatment plan to achievethe most desired horizontal upper lip position and therebyestablishing an esthetic profile.

关键词： Esthetic parameter photogrammetric analysis proportionalmeasurement

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