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Stress distribution on scalloped implants with different microthread and connection configurations using
Kyung-soo Choi1, Seong-hun Park, Jae-hoon Lee
1Department of Prosthodontics, School of Dentistry, Pusan National University, Busan, South Korea.
Summary
Scalloped implants with specific microthread designs and conical platform-switched connections reduce stress on surrounding bone. The connection type is more critical than microthread design for stress reduction in dental implants.
Area of Science:
- Biomaterials Engineering
- Dental Implantology
- Finite Element Analysis
Background:
- Dental implant stability and longevity are influenced by stress distribution in surrounding bone.
- Scalloped implant designs aim to improve bone integration, but their biomechanical behavior requires detailed investigation.
- Understanding stress patterns is crucial for optimizing implant design and preventing bone resorption.
Purpose of the Study:
- To analyze the biomechanical effects of various microthread designs and implant-abutment connections in scalloped dental implants.
- To compare stress distribution patterns between scalloped and flat-top implants under different loading conditions.
- To identify optimal design parameters for minimizing stress on the bone surrounding dental implants.
Main Methods:
- Three-dimensional finite element analysis (FEA) was employed to model scalloped and flat-top dental implants in a simulated anterior maxillary bone environment.
- Eight distinct models were created, incorporating variations in microthread design (two types, one absent) and connection systems (two types).
- Vertical and 30-degree oblique loads of 100 N were applied to evaluate peak stress levels and distribution patterns.
Main Results:
- Scalloped implants exhibited distinct stress patterns compared to flat-top implants, with peak stresses observed in proximal, buccal, and palatal cortical bone.
- The scalloped implant without microthreads combined with a conical platform-switched connection showed the lowest peak stress.
- Implants with straight platform connections exhibited 2-3 times higher peak stress than those with conical platform-switched connections.
Conclusions:
- Microthread design, connection configuration, and loading direction significantly influence stress distribution around scalloped implants.
- Conical platform-switched connections are more critical than microthread design for mitigating stress on surrounding bone.
- Scalloped implants with specific configurations (no microthread or closed microthread with conical platform-switched connection) demonstrated superior reduction in buccal bone stress compared to flat-top designs.
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