Accuracy Evaluation of a Stereolithographic Surgical Template for Dental Implant Insertion Using 3D Superimposition Protocol

作者：Cristache Corina Marilena; Gurbanescu Silviu

来源：INTERNATIONAL JOURNAL OF DENTISTRY, 2017, 2017: 4292081.

DOI：10.1155/2017/4292081

<jats:p><jats:italic>The aim</jats:italic> of this study was to evaluate the accuracy of a stereolithographic template, with sleeve structure incorporated into the design, for computer-guided dental implant insertion in partially edentulous patients.<jats:italic> Materials and Methods</jats:italic>. Sixty-five implants were placed in twenty-five consecutive patients with a stereolithographic surgical template. After surgery, digital impression was taken and 3D inaccuracy of implants position at entry point, apex, and angle deviation was measured using an inspection tool software. Mann–Whitney <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mrow><mml:mi>U</mml:mi></mml:mrow></mml:math> test was used to compare accuracy between maxillary and mandibular surgical guides. A <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M2"><mml:mrow><mml:mi>p</mml:mi></mml:mrow></mml:math> value &lt; .05 was considered significant.<jats:italic> Results</jats:italic>. Mean (and standard deviation) of 3D error at the entry point was 0.798 mm (±0.52), at the implant apex it was 1.17 mm (±0.63), and mean angular deviation was 2.34 (±0.85). A statistically significant reduced 3D error was observed at entry point <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M3"><mml:mi>p</mml:mi><mml:mo>=</mml:mo><mml:mo>.</mml:mo><mml:mn fontstyle="italic">037</mml:mn></mml:math>, at implant apex <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M4"><mml:mi>p</mml:mi><mml:mo>=</mml:mo><mml:mo>.</mml:mo><mml:mn fontstyle="italic">008</mml:mn></mml:math>, and also in angular deviation <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M5"><mml:mi>p</mml:mi><mml:mo>=</mml:mo><mml:mo>.</mml:mo><mml:mn fontstyle="italic">030</mml:mn></mml:math> in mandible when comparing to maxilla.<jats:italic> Conclusions</jats:italic>. The surgical template used has proved high accuracy for implant insertion. Within the limitations of the present study, the protocol for comparing a digital file (treatment plan) with postinsertion digital impression may be considered a useful procedure for assessing surgical template accuracy, avoiding radiation exposure, during postoperative CBCT scanning.</jats:p>

• 出版日期2017