## 4 Discussion
Our findings confirm that the guided technique is highly effective in removing fiberglass posts from both anterior and posterior teeth and can be replicated reliably. Due to its accuracy, the guided endodontic technique for the removal of fiberglass posts is less prone to failure and reduces the removal of crown material to a minimum. Wide crown openings may be necessary when one uses the conventional endodontic technique, and they always have a significant impact on the prosthetic work [25]. In the study by [PERSON] et al. [26], it was shown that ceramic crowns restored after endodontic access significantly decreased their resistance under load, with the access size being the main reason. Nondestructive methods have not been found in our literature review, but guided endodontics has been shown to be a conservative alternative, for it makes possible minimally invasive access and preserves prosthetic work. The present study, which was conducted in vitro, has certain limitations that need to be highlighted. As this study does not fully replicate the complex biological environment of a clinical setting, it is important to exercise caution when interpreting the results. One area where guided endodontic procedures can present several challenges is due to factors such as limited access and visibility, the number and location of teeth providing guide support, as well as the potential for movement or shifting of the guide during the procedure [27; 28]. Although guided procedures have demonstrated efficacy in many cases, it is essential to carefully consider the specific challenges and limitations of each case to determine the suitability and potential risks associated with the procedure. The incomplete seating of the surgical template can cause deviations generated by the guide to accumulate and affect the drilling accuracy [29]. Additionally, the lack of comparison with other techniques, such as conventional endodontic treatment, restricts the extent to which the results from this study can be applied. While the accuracy of the procedure is crucial, its clinical significance ultimately depends on its ability to improve the prognosis of the tooth and the success of the restoration. It is important to note that while guided endodontic access can be a minimally invasive and effective technique for accessing the root canal, it should not replace a proper inspection of the pulp chamber. The risk of missing important anatomy cannot be overlooked, and a thorough examination is necessary to ensure the best possible outcome for the treatment [30]. Clinicians should exercise caution when utilizing guided endodontic access and prioritize a comprehensive evaluation of the internal anatomy to avoid any potential complications. Although guided endodontics offers high precision, our study highlights the importance of the operator's influence on the outcome of the procedure. As demonstrated in our results, inexperienced operators were more likely to encounter complications such as perforation. Therefore, it is essential for clinicians to be aware of the potential risks associated with guided endodontics and to ensure adequate training and experience before implementing the technique in practice. While our study provides valuable insights into the operator's influence on guided endodontics, it is necessary to conduct further research that systematically investigates the various factors that impact the success of this technique. In addition to exploring potential confounding variables, such as operator experience, tooth location, and guide stabilization, comparative studies between guided endodontics and traditional endodontic techniques in clinical situations can be conducted to evaluate efficacy. This can enhance our understanding of the complexities of guided endodontics, help identify areas for improvement, and lead to the development of evidence-based strategies to minimize complications and improve patient outcomes.