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Influence of Platform Switching on Crestal Bone Resorption at Titanium Implants. A Histomorphometrical Study in Dogs

Author: GuoLiQiang
Tutor: ZhaoBaoDong
School: Qingdao University
Course: Clinical Stomatology
Keywords: Dental implants Animal Model Bone resorption Platform transfer Tissue morphology
CLC: R783.6
Type: Master's thesis
Year: 2010
Downloads: 106
Quote: 1
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Abstract


Objective: In this study, through the establishment of animal models of dental implants, using tissue morphological methods, research in the weight-bearing and non-weight-bearing conditions, different implant - abutment connection face design on crestal bone resorption. The choice of clinical implants provide a theoretical basis for the implant - abutment connection surface design optimization. METHODS: Healthy adult mongrel dogs 6 anesthesia after the removal of mandibular second, third, fourth premolars. Buried in France implant healing after 3 months, a total of 36. Packet control implant abutment connection surface design divided into three groups: A group of implant the U.S. system implants Osstem-traditional design; B group was implanted Osstem-GS system design platform transfer implant ; the C group implant platform transfer design Ankylos implant. Three months later, the line buried two implant surgery, the connection gums forming abutment; One month later, the right side of the line metal crowns, the left does not do the repair. Experimental dogs were sacrificed after 8 months, produced with hard tissue implant bone grinding. The specimen slice through image analysis positioning implant osseointegration: implant shoulder (IS), the highest point of the coronal (CLB), crestal bone level (BC) and the junctional epithelium vertex (AJE); measurement of each group IS- CLB, IS-BC, and the IS-AJE from the data for statistical analysis. Results: (1) all animals no infection and accidental death, all implants no clinical mobility, a good soft tissue cuff, with good bone, 100% success rate. (2) A group of IS-CLB to 1.16 ± 0.26 mm (weight), 1.15 ± 0.37mm (non-weight-bearing); IS-BC to 0.76 ± 0.32 mm (weight), 0.72 ± 0.59mm (non-weight-bearing); IS-Aje 0.94 ± 0.29mm (weight), 1.07 ± 0.35mm (non-weight-bearing). (3) B group IS-CLB to 0.33 ± 0.33 mm (weight), 0.34 ± 0.51 mm (non-weight-bearing); IS-BC to 0.21 ± 0.31mm (weight), 0.21 ± 0.50mm (non-weight-bearing); IS-Aje 0.17 ± 0.34mm (weight), 0.07 ± 0.34mm (non-weight-bearing). (4) C group IS-CLB -0.10 ± 0.63mm (weight), -0.07 ± 0.44mm (non-weight bearing); IS-BC as 0.04 ± 0.42mm (weight), 0.14 ± 0.30 mm (non-weight bearing); IS The-aJE to -0.01 ± 0.1lmm, (weight), -0.02 ± 0.18mm (non-weight bearing). (5) A group of traditional design platform transfer design group B, C group compared to the IS-CLB, IS-BC and IS-AJE difference was highly significant (P lt; 0.01), platform transfer design group B compared with group C, IS-CLB, IS-BC and IS-AJE difference was no significant (P gt; 0.05); (6) in each group IS-CLB, IS-BC and IS-AJE labial tongue side was no significant difference (P gt; 0.05), there was no significant difference (P> 0.05) in weight-bearing and non-weight-bearing conditions. (1) traditional design of the implant neck appear more obvious bone resorption, bone resorption phenomenon has nothing to do with the implant functional weight; (2) Compared with the traditional design, the platform transfer design can effectively reduce crestal bone absorption, stability crestal bone level, worthy of clinical application. (3) transfer platform designed implants reduce neck bone resorption mechanism may be formed on the surface of the platform: the implant - abutment connection effectively block the bacteria, inflammatory cells along the implant surface downward invasion; and biological Learn width form a restriction on the platform. Thereby reducing the micro-gap factors, biological width factors crestal bone resorption.

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