使用单种植体或双种植体支撑冠修复牙周中宽的单缺失臼齿：自控病例报告和 3D 有限元分析

IF 3.2 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of prosthodontic research Pub Date : 2024-04-19 DOI:10.2186/jpr.jpr_d_23_00278

Iohong Wong, Zhengchuan Zhang, Xiaobing Dang, Xiaoran Yu, Xiaoxuan Lin, Yiming Li, Feilong Deng, Ruogu Xu

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引用次数: 0

摘要

目的：本研究基于一个自控病例，评估了单颗缺失臼齿的有限元分析（FEA）结果，该缺失臼齿的中髁间长度（MDL）较宽，采用单种植体支撑冠或双种植体支撑冠修复：对一例双侧下颌第一磨牙缺失且MDL较宽的病例采用单种植体支持冠或双种植体支持冠进行修复。比较了种植体的存活率和种植体周围的骨量。结合该病例，使用不同 MDL（12、13、14 和 15 毫米）的八个模型进行了有限元分析。在有限元分析中计算了 Von Mises 应力，以评估种植体在不断增加的垂直和横向负荷下的生物力学反应，包括种植体、基台、螺钉、牙冠和皮质骨的应力值：有限元分析计算出的 von Mises 应力显示，当 MDL 为 14 mm 时，单种植体支持策略下骨质和修复体承受的应力更大。当 MDL 为 14 mm 和 15 mm 时，强度分别为 188.62-201.37 MPa 和 201.85-215.9MPa，大大超过了允许屈服应力（180 MPa）：与单种植体支持冠相比，当单颗缺失磨牙的MDL≥14 mm时，双种植体支持冠降低了种植体周围的骨应力，并在种植体-骨界面产生了更合适的应力传递模型。

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Single missing molar with wide mesiodistal length restored using a single or double implant-supported crown: A self-controlled case report and 3D finite element analysis

Purpose: Based on a self-controlled case, this study evaluated the finite element analysis (FEA) results of a single missing molar with wide mesiodistal length (MDL) restored by a single or double implant-supported crown.

Methods: A case of a missing bilateral mandibular first molar with wide MDL was restored using a single or double implant-supported crown. The implant survival and peri-implant bone were compared. FEA was conducted in coordination with the case using eight models with different MDLs (12, 13, 14, and 15 mm). Von Mises stress was calculated in the FEA to evaluate the biomechanical responses of the implants under increasing vertical and lateral loading, including the stress values of the implant, abutment, screw, crown, and cortical bone.

Results: The restorations on the left and right sides supported by double implants have been used for 6 and 12 years, respectively, and so far have shown excellent osseointegration radiographically.

The von Mises stress calculated in the FEA showed that when the MDL was >14 mm, both the bone and prosthetic components bore more stress in the single implant-supported strategy. The strength was 188.62–201.37 MPa and 201.85–215.9 MPa when the MDL was 14 mm and 15 mm, respectively, which significantly exceeded the allowable yield stress (180 MPa).

Conclusions: Compared with the single implant-supported crown, the double implant-supported crown reduced peri-implant bone stress and produced a more appropriate stress transfer model at the implant-bone interface when the MDL of the single missing molar was ≥14 mm.

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来源期刊

Journal of prosthodontic research DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

6.90

自引率

11.10%

发文量

161

期刊介绍： Journal of Prosthodontic Research is published 4 times annually, in January, April, July, and October, under supervision by the Editorial Board of Japan Prosthodontic Society, which selects all materials submitted for publication. Journal of Prosthodontic Research originated as an official journal of Japan Prosthodontic Society. It has recently developed a long-range plan to become the most prestigious Asian journal of dental research regarding all aspects of oral and occlusal rehabilitation, fixed/removable prosthodontics, oral implantology and applied oral biology and physiology. The Journal will cover all diagnostic and clinical management aspects necessary to reestablish subjective and objective harmonious oral aesthetics and function. The most-targeted topics: 1) Clinical Epidemiology and Prosthodontics 2) Fixed/Removable Prosthodontics 3) Oral Implantology 4) Prosthodontics-Related Biosciences (Regenerative Medicine, Bone Biology, Mechanobiology, Microbiology/Immunology) 5) Oral Physiology and Biomechanics (Masticating and Swallowing Function, Parafunction, e.g., bruxism) 6) Orofacial Pain and Temporomandibular Disorders (TMDs) 7) Adhesive Dentistry / Dental Materials / Aesthetic Dentistry 8) Maxillofacial Prosthodontics and Dysphagia Rehabilitation 9) Digital Dentistry Prosthodontic treatment may become necessary as a result of developmental or acquired disturbances in the orofacial region, of orofacial trauma, or of a variety of dental and oral diseases and orofacial pain conditions. Reviews, Original articles, technical procedure and case reports can be submitted. Letters to the Editor commenting on papers or any aspect of Journal of Prosthodontic Research are welcomed.