BackgroundRehabilitation using an implant supported overdenture with two implants inserted in the interforaminal region is the easiest and currently accepted treatment modality to increase prosthetic stabilization and patient satisfaction in edentulous patients. The insertion of implants to the weakend mandibular bone decreases the strength of the bone and may lead to fractures either during or after implant placement. The aim of this three dimensional finite element analysis (3D FEA) study was to evaluate the biomechanical effects of implant diameter in case of facial trauma (2000 N) to an edentulous atrophic mandible with two implant supported overdenture.MethodsThree 3D FEA models were simulated; Model 1 (M1) is edentulous atrophic mandible, Model 2 (M2), 3.5x11.5 mm implants were inserted into lateral incisors area of same edentulous atrophic mandible, Model 3 (M3), 4.3x11.5 mm implants were inserted into lateral incisors area of same edentulous atrophic mandible.ResultsIn M1 and M2 highest stress levels were observed in condylar neck, whereas highest stress values in M3 were calculated in symphyseal area.ConclusionsTo reduce the risk of bone fracture and to preserve biomechanical behavior of the atrophic mandible from frontal traumatic loads, implants should be inserted monocortically into spongious bone of lateral incisors area.

The second premolar to second molar zone was considered a suitable graft site based on the mean palatal mucosal thickness.

BackgroundThe aim of this study was to investigate the neurovascular bundle (NVB) position with cone-beam computerized tomography (CBCT).MethodsCBCT images of 345 patients were evaluated. The distance from the neurovascular bundle to the cemento-enamel junction (CEJ) was measured (DNB). The distance from mid-palatal suture to the alveolar crest was used to determine the palatal depth. Palatal junction angle (PA) was measured using the junction angle between the hard palate and alveolar crest. The relationships between the DNB and the palatal depth and between these two parameters and the PA were evaluated. Student’s t-test was used to analyze the differences in DNB related to gender, and the correlation between the DNB while Pearson correlation analysis was used to determine the correlation between the DNB and age (p = 0.05). The relationship between the DNB and the palatal depth, and the relationship between these two parameters and the PA were also evaluated using Pearson correlation analysis.ResultsExcept at the canine and first premolar areas the DNB was positively correlated with the palatal depth. No significant relationship between the PA and DNB or with PVD was observed. The highest DNB was 14 mm at the first molar, and the lowest was 10.8 mm at the canine.ConclusionsCare is needed while rotating flap and harvesting the subepithelial connective tissue graft at the canine area because the neurovascular bundle passes approximately 11 mm apically to CEJ at the canine region.

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ÖZETThe purpose of this study is to determine the prevalance and severity of temporomandibular joint disorders (TMJD) in dentistry students. Subjects and Method: 206 male and 203 female total of 409 students of Near East University Faculty of Dentistry were evaluated. An online questionnaire of Fonseca was sent to the students via e-mail and requested to be filled voluntarily. Samples were investigated by means of Fonseca's Questionnaire criteria.Results: According to the results of the questionnaire, 56.5% of the participated students showed some level of TMJD and female students were affected more than male students (p≤0.05). Conclusion: Our findings showed that Near East University Faculty of Dentistry students have high prevalance of TMJD and it is seen higher in women. Stress is thought to play a major role in the occurrence or increase in severity of TMJD. However, more studies are required to identify risk factors associated with TMJD to establish measures for prevention and treatment.

Implant periapical lesion (IPL), an inflammatory lesion surrounding the apex of a dental implant, has been previously reported as a possible cause for implant failure. This article describes 2 successive cases of active IPL that were diagnosed early by clinical signs and radiologic findings. Lesions were treated surgically with implant removal and debridement. The etiology, findings, and treatment approaches for IPL are discussed in comparison with other reports.

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