soheil taghavi

There is ample evidence for the widespread use of dental implants in recent decades and the increasing success of this treatment. Accordingly, research and investigation concerning the techniques and systems of the mentioned practice are of remarkable significance. One crucial factor contributing to the success of this treatment is proper implant placement in the bone, and many dentists utilize various guides to facilitate this process. However, some still believe that free-hand systems have more applications. Therefore, the authors of this article decided to review several studies that compared guided and free-hand systems and provide a comparison of these two approaches. In this article, the databases Scopus and PubMed were searched, and Google Scholar was also utilized for the search. A total of 11 article titles were approved and reviewed. Based on the findings of the reviewed articles, it should be emphasized that the use of guides can significantly impact the treatment outcomes, especially for inexperienced dentists and patients with periodontitis who may not have favorable bone conditions. Nevertheless, it's important to note that even free-hand systems still have a considerable success rate.

The present study aimed to assess the prevalence of periodontal bony lesions in radiographs in the Iranian population.

In this analytical cross-sectional study, 440 radiographic images of patients aged 15-60 years were selected based on the study’s inclusion criteria. Two researchers evaluated all radiographs and recorded patient age, gender, and bone-related lesions (horizontal , vertical and furca involvement) in a checklist. Chi-square test was used for data analysis. (α=0.05).

273 images (62.05%) had no lesions and 167 images (37.95%) had lesions. In the 167 examined images, a total of 845 bone lesions were observed . The highest frequency was in horizontal lesions in the anterior mandible and central incisor teeth and the lowest type of lesion was related to vertical lesions in the posterior mandible and in the third molar (P<0.001). The most types of bone lesions; Based on the type of tooth, was related to horizontal lesions in the lateral incisor and the lowest type of lesion was related to vertical lesions in the first premolar tooth (P<0.001). Based on restoration, the most related to horizontal lesions in amalgam and the least related to vertical lesions and furca in veneer (P<0.001). Based on the contact status, the most was related to horizontal lesions in open contact and the least was related to vertical lesions (P<0.001).

Based on this study, there is a significant association between the type of periodontal bony lesion and involved teeth, restoration type, contact status, presence of calculus on radiographs.