Abstract
Accuracy is a common challenge in dental implant placement. A successful clinical outcome is largely determined by accurate positioning of the implant at the prepared site and proper angulation. This study aimed to compare the divergence between the axes of the implants installed using a classic freehand technique. Cartesian coordinates of implant necks were determined on the CT images of 34 patients in the XOY (horizontal) plane, followed by the coordinates of implant apices. The obtained data were submitted to the original software developed by the authors (patent 2018661716) that automatically computed an angle between the insertion axes of the installed implants. We found that in 87% of cases, this angle was significantly greater (up to 27°) than recommended by implantation dentistry guidelines (7°). In 100% of the studied cases, the implants were not parallel; in sector 1, the deviation was 27° 4`.
Highlights
Accuracy is a common challenge in dental implant placement
Compliance with ethical standards: this study was conducted in compliance with the ethical standards for specialized medical care (Order 1525n of the Ministry of Healthcare of the Russian Federation, dated December 2012) and approved by the Ethics Committee of Samara State Medical University (Protocol 673/17 dated September 11, 2018)
A misangled implant poses a serious problem for further treatment
Summary
A successful clinical outcome is largely determined by accurate positioning of the implant at the prepared site and proper angulation. This study aimed to compare the divergence between the axes of the implants installed using a classic freehand technique. Целью работы было провести сравнительный анализ угловых отклонений дентальных имплантатов, установленных по классической методике, по «методу свободной руки» («free hand»). Полученные координаты помещали в разработанную нами программу ЭВМ No 2018661716 «Программа расчета угловых отклонений дентальных имплантатов», которая автоматически вычисляла угловое отклонение между осями установленных имплантатов. В. Иващенко — написание статьи, разработка дизайна исследования, подбор клинического материала; А. Е. Ротин — разработка дизайна исследования, подбор клинического материала; В. Accurate positioning and proper angulation of a dental implant determine successful treatment outcomes and contribute to the durability of an implant prosthesis. A few researchers report that in some cases the freehand technique can result in a substantial divergence of up to 35° [2]
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