After the top and lower TI17 price casts had been scanned individually, as well as the buccal data of casts in ICO had been scanned because of the help of the dental care articulator place, enrollment was done utilising the enrollment software. Then the electronic casts mounted in ICO as well as the buccal occlusal data were conserved in standard tessellatiosite cylinder was (0.232±0.089) mm. There was no statistical difference between the feature points 5-5′, while there were statistical differences between the other feature points. CONCLUSION because of the dental care articulator place method, the design scanner reproduces the occlusal contact point with a high susceptibility and PPV, and that meets medical needs. Meanwhile, the exact distance between the feature things is higher than the reference value, that may lead to occlusal disturbance, and require clinical grinding.OBJECTIVE to give a reference for using intraoral scanners for making medical diagnostic dentures of edentulous jaws by researching the precision of three intraoral scanners for major effect and jaw relation record of edentulous jaws. TECHNIQUES this research contained 6 primary impressions of this edentulous clients. All the impressions contains the maxillary main impression, the mandibular primary impression plus the jaw connection record. For every of these, a dental cast scanner (Dentscan Y500) was used to obtain stereolithography (STL) information as research scan, and then three intraoral scanners including i500, Trios 3 and CEREC Primescan were used for 3 x to acquire STL information as research teams. In Geomagic Studio 2013 pc software, trueness had been obtained by researching research groups because of the guide scan, additionally the accuracy ended up being obtained from intragroup evaluations. Registered maxillary data associated with intraoral scan with reference scan, the morphological mistake of jaw relation record ended up being acquired (0.62±0.18) mm, and (0.53±0.53) mm for anterior and posterior directions; (0.95±0.59) mm, (0.69±0.45) mm, and (0.60±0.22) mm for left and right instructions. The displacement regarding the jaw place regarding the three scanners in straight dimension, anterior and posterior guidelines additionally the left and correct directions were within the 95% consistency restriction. CONCLUSION Three intraoral scanners showed good trueness and precision. The i500 and Trios 3 scanners had more errors in jaw connection record, nevertheless they were used as major jaw connection record. It’s advocated that three intraoral scanners can be used for acquiring electronic data to create diagnostic dentures and specific trays, decreasing feasible deforming or crack when sending impressions from center to laboratory.OBJECTIVE to evaluate the connection amongst the width of the maxillary anterior teeth additionally the anterior arch perimeter, to assess the change rule associated with width regarding the anterior teeth and the anterior arch perimeter, when changed the convexity associated with anterior arch, with the width regarding the maxillary anterior arch maintaining constant, and to provide a dependable basis for later digitized and individualized aesthetic analysis of forward teeth. METHODS In the study, 61 front teeth total and well-arranged models was chosen from the working models after the prostheses in division of Prosthodontics, Peking University School and Hospital of Stomatology, including 22 male models and 39 female models. An image ended up being extracted from the occlusal surface of each design utilising the fixed magnification with an individual lens reflex camera. The width of anterior teeth, the width of anterior arch and the convexity of anterior arch have been assessed with the medical biotechnology Photoshop software. The proportion regarding the width associated with the anterior teeth towards the widthn the number academic medical centers of 5 mm and the width of anterior teeth or the front arch circumference. With each boost or decrease of 1 mm regarding the convexity of anterior arch, the width regarding the middle incisor increased or reduced by about 0.18 mm, the 1 / 2 circumference of the anterior arch increased or diminished by about 0.50 mm. CONCLUSION The width regarding the anterior teeth when you look at the middle-distal direction remained stable within the anterior arch circumference. Within a specific range, once the width of this maxillary anterior arch remains unchanged, the width of the anterior teeth plus the border associated with anterior teeth tend to be positively correlated to your convexity regarding the anterior arch.OBJECTIVE to research the feasibility and precision of utilizing digital technology to develop anterolateral thigh flap (ALTF) in dental and maxillofacial defect repair. METHODS Ten instances underwent dental and maxillofacial defects repair with ALTFs in division of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology from Summer 2019 to Oct. 2019 had been enrolled. There were 7 men and 3 females aided by the mean age of 47.1 years.