In this study, the aim was to evaluate the effects of the adjuvant piperacillin–tazobactam solution in the mechanical treatment of periodontitis. A single-blind split-mouth randomized study, it included 24 participants. All of them presented periodontitis stage III according to the 2018 World Workshop classification and the presence of at least one of the following periodontal pathogens: Aggregatibacter actinomycetemcomitans; Porphyromona gingivalis; Treponema denticola; Tannerella forsythia; Prevotella intermedia. The study established two groups: a control group (SRP: scaling and root planing) and a test group (SRP plus local piperacillin–tazobactam). The final recruitment included 11 women (45.8%) and 13 men (54.2%). The age range was between 25 and 72 years, and the mean age was 57 ± 10.20 years. Clinical controls were performed at 2 weeks, 3 months, and 6 months, repeating the SRP and applying the piperacillin–tazobactam solution again at the 3-month appointment. The clinical attachment level decreased by a mean of 2.13 ± 0.17 mm from the baseline to 6 months in the test group versus 1.63 ± 0.18 mm in the control group. The mean probing pocket depth decreased from 1.32 ± 0.09 mm in the test group, versus from 0.96 ± 0.14 mm on the control side. The plaque index in the test group decreased by 0.46 ± 0.04, while it decreased by an average of 0.31 ± 0.04 in the control group. In conclusion, the local use of piperacillin–tazobactam as complementary therapy produces better clinical results in patients with periodontitis. However, these results are not maintained over time, and so a more persistent local application is necessary.

Background/Objectives: Perforation of the maxillary sinus floor by dental implants is a complication that can occur during treatment in posterior sectors; however, its clinical and radiological consequences remain controversial. Therefore, this study aimed to use the diagnostic value of CBCT to determine the possible association between sinus floor-perforating implants and their clinical and/or radiological impact. Methods: A retrospective observational study was conducted on CBCT scans from 21 patients with implants protruding into the maxillary sinus. Morphometric analysis was performed to assess sinus membrane thickening (SMT) patterns, height, surface area and density and the presence of sinonasal symptoms. Statistical analysis was used to explore potential associations between SMT and variables such as implant protrusion length, number of perforating implants, age and gender. Results: SMT was observed in all patients, with a mean area of 11.1 ± 6.4 mm² in panoramic sections. Most cases (85.7%) exhibited a circumferential SMT pattern. No statistically significant correlation was found between SMT and implant protrusion length, age or sex. Additionally, none of the patients reported sinonasal symptoms, and no clinical signs of sinusitis were detected during follow-up. Conclusions: Although sinus floor-perforating implants commonly induce SMT detectable on CBCT, this thickening appears largely asymptomatic and may not compromise patient well-being in the short term. Nevertheless, clinicians should monitor these cases radiographically to detect possible long-term complications.

Paradental cysts are inflammatory lesions that typically occur associated with the mandibular third molar, posing a challenge in the differential diagnosis with other odontogenic cysts. This paper describes the diagnostic and therapeutic management of a paradental cyst that was initially considered a dentigerous cyst based on its pericoronal location and radiological appearance as a well-defined unilocular radiolucency associated with an impacted tooth. A 64-year-old male patient presented with pain in the right mandibular region. Panoramic radiography and cone-beam computed tomography revealed a well-defined unilocular lesion associated with an impacted mandibular third molar, extending towards the mandibular second molar. Surgical treatment included complete enucleation of the lesion and extraction of both teeth. Histopathological analysis showed a non-keratinized stratified epithelial lining with chronic inflammatory cell infiltrate; together with the clinical and radiological findings, this allowed the definitive diagnosis of a paradental cyst. The postoperative course was uneventful, and a follow-up radiograph obtained at nine months showed early signs of ossification of the residual cavity.