Chiapasco Matteo, Ferrini Francesco, Casentini Paolo, Accardi Stefano, Zaniboni Marco
Unit of Oral Surgery, Department of Medicine, Surgery and Dentistry, San Paolo Hospital, University of Milan, Milan, Italy.
Clin Oral Implants Res. 2006 Jun;17(3):265-72. doi: 10.1111/j.1600-0501.2005.01196.x.
This study has been designed to evaluate the capability of a new surgical device (Extension Crest) to widen narrow edentulous alveolar ridges and to allow a correct placement of endosseous implants in horizontally atrophied sites.
Forty-five patients, 20 males and 25 females, aged 20-66 years, affected by edentulism associated to horizontal resorption of the ridges, were treated by means of a sagittal osteotomy and expansion of the ridge with a new surgical device (Extension Crest) to obtain a wider bony base for ideal implant placement. In the same procedure in 33 patients, and 1 week afterwards in 12 patients, 110 endosseous titanium implants (ITI TE) were placed. Three to four months later, the patients were rehabilitated with implant-supported prostheses.
The success rate of the expansion technique was 97.8%. A total of 110 implants were inserted in the expanded ridges. The mean follow-up after the start of prosthetic loading was 20.4 months. Three implants were removed before the start of prosthetic loading, because of non-integration, while no other implants failed after the completion of the prosthetic rehabilitation. Three implants, although integrated and in function, did not fulfill success criteria: cumulative success and survival rates at the end of the observation period were 95.4% and 97.3%, respectively.
Within the limits of this study, this technique appeared to be reliable and simple, with reduction of morbidity and times of dental rehabilitation as compared with other techniques such as autogenous bone grafts and guided bone regeneration. Survival and success rates of implants placed in the treated areas are consistent with those placed in native bone.
本研究旨在评估一种新型手术器械(延伸嵴顶)拓宽狭窄无牙牙槽嵴以及在水平萎缩部位正确植入骨内种植体的能力。
45例患者,年龄20 - 66岁,其中男性20例,女性25例,患有与牙槽嵴水平吸收相关的无牙症,采用矢状骨切开术并用新型手术器械(延伸嵴顶)扩张牙槽嵴,以获得更宽的骨基底部用于理想的种植体植入。在33例患者的同一手术过程中,以及12例患者术后1周,植入了110枚骨内钛种植体(ITI TE)。三到四个月后,患者用种植体支持的假体进行修复。
扩张技术的成功率为97.8%。在扩张后的牙槽嵴中总共植入了110枚种植体。假体加载开始后的平均随访时间为20.4个月。由于未整合,有3枚种植体在假体加载开始前被取出,而在假体修复完成后没有其他种植体失败。有3枚种植体尽管已整合且在发挥功能,但未达到成功标准:观察期末的累积成功率和生存率分别为95.4%和97.3%。
在本研究的范围内,该技术似乎可靠且简单,与自体骨移植和引导骨再生等其他技术相比,发病率和牙齿修复时间有所减少。在治疗区域植入的种植体的生存率和成功率与在天然骨中植入的种植体一致。