Full Contoured Tooth-Implant Supported 3-Pointic All-Ceramic Denture During Occlusal Load Transfer in Lateral Region

Abstract

Implant and a tooth supported dentures are avoided by dentists because of uneven distribution of occlusal loads between a stiffer implant and a more pliable tooth. The hypothesis was that a 3-point all-ceramic bridge supported on a natural second premolar tooth and a two-pieces typical implant bears safely mastication loads. The finite element analysis showed that the implant splinted by all-ceramic zirconium bridge with the second premolar was safe under lateral mastication load, but there was found an overload at wide zone of bone tissue around the implant under the load of 800 N. The patients can safely masticate, but comminution of hard food should be avoided and they should be instructed that after such an indiscretion they need to contact a dental professional, because, in spite of integrity of the prosthesis, the bone tissue around the implant may fail and there is a hazard of intrusion of the tooth.

Biomechanical Evaluation of Initial Stability of a Root Analogue Implant Design with Drilling Protocol: A 3D Finite Element Analysis

“…In addition, Figure 8 showed that the region where the stress is very concentrated is closest to sharp margin of solid bodies of cortical bone. This region is the area around the dental implant neck, which coincides with the area where bone atrophy occurs due to overload in long-term clinical practice, which is similar to previous finite element analysis results and interpretations for dental implants [34].…”

The study of the connection between the zirconia substructure and veneering porcelain in dental crowns subjected to occlusal forces

“…The study showed an average hardness of porcelain 562.24 HV 0.5 . This result is similar to the hardness of the enamel [4,15,16]. The patient's own teeth should not rub off on contact with the restorations.…”

“…Cracks that have arisen in this group are the result of compressive force that was loaded centrally on the occlusal surfaces. It should also be noted that the authors of many publications on the biomechanics of the mastication reflect the gentle slope of the teeth during biting [15][16][17][18]. Good mechanical properties obtained by zirconia allow for using it for manufacturing of substructures with a smaller wall thickness.…”

“…Prosthetic treatment with restorations made of metal may cause discoloration in the area of both the gingival margin and the tooth tissue. In addition, the use of such amendment will not ensure the achievement of transparency of light similar to natural teeth [15][16][17][18].…”