植入Platform Switching植體周圍齒槽骨的變化，對於垂直軟組織厚度的影響：一項臨床研究的比較

Influence of Vertical Soft Tissue Thickness on Crestal Bone Changes Around Implants with Platform Switching: A Comparative Clinical Study


Tomas Linkevicius, DDS, Dip Pros, PhD;* Algirdas Puisys, DDS;†
Marius Steigmann, DDS;‡ Egle Vindasiute, DDS;§ Laura Linkeviciene, DDS, PhD¶
出處：Clinical Implant Dentistry and Related Research, Volume *, Number *, 2014

 

ABSTRACT摘要
Background: 背景
 
Numerous studies have shown the superiority of platform-switched implants in preserving crestal bone as compared with platform-matched implants.However, the influence of initial soft tissue thickness on development of crestal bone loss has not been addressed in previous studies; thus, further research is needed.
許多研究顯示，platform-switched植體與plaform-matched植體相較下，更優於保存齒槽骨。然而，以前的研究尚未發表出初始的軟組織厚度對於齒槽骨流失的影響。因此，更進一步的研究是需要的。
 
Purpose: 目的
 
To evaluate crestal bone levels around platform-switched implants placed in thin and thick mucosal tissue.
在薄和厚的黏膜組織植入platform-switched植體，來評估植體周圍齒槽骨的水平。
 
Materials and Methods: 材料和方法
 
Eighty patients (38 male and 42 female, mean age 44±3.34 years) received 80 bone-level implants of 4.1 mm in diameter with platform switching (Institut Straumann AG, Basel, Switzerland). Tissue thickness was measured,and cases were distributed to Group 1, with thin soft tissue (2 mm or less, n = 40), and Group 2, with thick tissue (more than 2 mm, n = 40). Implants were placed with a one-stage approach and restored with screw-retained restorations.Radiographic examination was performed after implant placement, 2 months after healing, after restoration, and at 1-year follow-up post-reconstruction. Crestal bone loss was calculated. The Mann-Whitney U-test was applied, and significance was set to p 2 .05.
80位病患(38位男生和42位女生，平均年紀44±3.34歲)分別植入80支直徑4.1mm platform switching的bone-level植體(Institut Straumann AG, Basel, 瑞士巴塞爾)。 測量組織厚度，並將病例分配到第1組具有較薄的軟組織（2mm或更少，n = 40）和第2組具有較厚組織（超過2mm，n = 40）。植體採用One-stage植入，並使用screw-retained 的方式贗復。分別在植體植入後，癒合期後2個月，贗復後，和術後重建1年的追蹤進行放射學的檢查。計算齒槽骨流失。Mann-Whitney U-test的應用，並顯著性設定在p=2.05。



 
Results: 結果
 
Implants in Group 1 (thin tissue) showed 0.79 mm of bone loss after 2 months. After 1-year follow-up, bone loss was 1.17 mm. Implants in Group 2 (thick tissue) showed bone loss of 0.17 mm after 2 months of implant placement and 0.21 mm after 1-year follow-up. The differences between groups were significant (p < .001) at both time points.
第一組植入物(薄組織)在兩個月後骨流失0.79mm，一年後追蹤，骨流失為1.17mm。第二組植入物(厚組織)在兩個月後骨流失0.17mm，一年後追蹤，骨流失為0.21mm。在兩者時間點間，組別間都是有顯著差異的 (p<.001)。




 
Conclusions: 結論
 
It can be concluded that platform switching does not prevent crestal bone loss if, at the time of implant placement,mucosal tissue is thin. In thick soft tissue, use of platform-switched implants maintained crestal bone level with minimal remodeling.
可以得出結論，如果platform switching植體種植在薄的黏膜組織是不能防止齒槽骨流失的。而在厚的軟組織中，植入platform-switched植體可維持齒槽骨的水平與最小型態的重塑。
 

 

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