![]() ![]() The main challenge can be accurately transfering the soft tissue contour to the cast.” Finally, what are the main misconceptions you hear about the emergence profile? “Another consideration is that, in anterior cases, it is required to create an ideal gingival contour with a provisional crown before taking the impression for the final crown. “The main challenges that prevent a clinician achieving an optimized emergence profile are improper choice of implant diameter and/or improper implant placement depth. Poor emergence profile design has consequences that can ultimately lead to the loss of the implant.” What are the main challenges that can hinder the creation of an optimal emergence profile? “When the emergence profile is optimal it allows the patient to maintain the required level of hygiene around the implant. It is a prerequisite for the formation of pseudo-papillae in the inter-proximal spaces. ![]() This prevents the formation of proximal or buccal/lingual food traps. “An optimal emergence profile supports the gingiva around the implant-supported crown. Smaller platform implants should be placed deeper, leaving more vertical room to compensate the discrepancy in diameter between the horizontal cross section of the future crown at the gingival level and the platform itself.” Why is it worth investing time and effort in optimizing the emergence profile? “Internal connections such as Nobel Biocare’s conical connection, which can be placed under the bone level, allow more flexibility when placing the implant. “In addition, the connection type (external or internal) and the collar of the implant, whether polished or not, have a direct influence on how deep an implant can be placed to preserve the surrounding bone from physiologic resorption while retaining the biologic width. The angle between the platform of the implant and the wall of the abutment should be as wide as possible to avoid creating a bacteria reservoir “The contour of the abutment from the platform to the gingival level is the emergence profile. Errors are quantified as the maximum radial deviation (RONt) away from this reference circle.How exactly does the choice of implant affect the emergence profile?įirstly, the discrepancy between the diameter of the implant platform and the cross-section diameter of the future crown at the gingival level needs to be compensated by the abutment. The maximum inscribed circle, sometimes referred to as the plug gauge circle, is the largest circle that is totally enclosed by the profile. Out of roundness is quantified as the largest deviation from this circle (RONt). This is also known as the ring gauge reference circle and is the smallest circle that totally encloses the profile. The roundness value is then given as their radial separation. The MZC is defined as two concentric circles positioned to just enclose the measured profile such that their radial departure is a minimum. This is a very convenient reference circle to derive, as it is mathematically precise. The out of roundness value is the difference between the maximum and minimum radial departure from the reference circle centre. The Least Squares reference circle is a circle where the sum of areas inside this circle are equal to the sum of the areas outside the circle and kept to a minimum separation. Contract Measurement and Inspection Services.Micro Alignment Telescopes with built in optical micrometers.Micro Alignment Telescope with CCTV digital camera.Alignment telescopes without micrometers.Ultra High Precision Dual Axis Digital Autocollimator.Multi-part / Ultra High Precision Roundness.Surtronic® Duo II - Surface Roughness Tester.Surtronic® S-100 Series - Surface Roughness Tester.Aerospect SPS - Stack Prediction Systems.
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