Objective To investigate the effect of surgical guide support and implant site location on the accuracy of static Computer‐Assisted Implant Surgery (sCAIS) in partially edentulous patients. Materials and Methods 375 replica implants were inserted in 85 study models. Surgical implant placement was done using static 3D printed surgical guides, which were designed to be supported either by all the teeth present in the model (full arch), or by 4‐teeth), 3‐teeth or 2‐teeth. Each study model included three single‐tooth gap (STG) situations; one extraction socket site and two implants placed in a distal extension situation. Preplanned and postoperative implant positions were compared using the treatment‐evaluation tool in digital software. 3‐dimensional and angular deviations were measured. Statistical analysis was done using ANOVA, and pairwise t tests and Bonferroni‐Holm's adjustment were applied as a post hoc test. Results Accuracy of surgical guides used in sCAIS was significantly affected by the number and type of teeth used for its support. Guides supported by 4 teeth were not significantly different from accuracy of full‐arch‐supported guides (p > .05). Guide support by posterior teeth was associated with an increased level of accuracy, when compared to anterior teeth guide support. Implants placed in extraction sockets were associated with significantly higher 3D and angular deviation values (p < .05), and surgical guides with a distal extension situation resulted in significantly higher deviation values (p < .05). Conclusion The number and location of teeth supporting the surgical guide can significantly influence the accuracy of sCAIS, with 4 teeth providing equal accuracy to full‐arch guides in (STG) situations.

Objective The aim of this study was to evaluate the effect of three different macrodesigns and two different insertion devices on the accuracy of static computer‐assisted implant surgery (sCAIS). Materials and Methods Ninety implant replicas with three different macrodesigns: Soft tissue level (TL), bone level (BL), and bone level tapered (BLT) were placed in 30 dental models with two implant insertion devices: Guided adapter and guided screwed‐in mount. Preoperative and postoperative positions of implants were compared and the mean angular deviation, crestal, and apical three‐dimensional (3D) deviation were calculated for each implant macrodesign and each insertion device. Data were analyzed using analysis of variance, post hoc t‐tests and Bonferroni‐Holm's adjustment method. P values less than .05 were considered statistically significant. Results BLT implants had lower mean 3D deviation values at the crest and the apex when compared with 3D deviations with BL and TL implants (P < .05). Also, BLT implants had lower angular deviations, when compared with BL and TL Implants, however, angular deviations were not statistically significant (P > .05). Considering the insertion device method, no significant differences were noted between insertion devices irrespective of the deviation analyzed. Conclusion The macrodesign of dental implants may have an influence on the accuracy of sCAIS, with tapered designs offering slightly better positional accuracy than parallel‐walled macrodesigns independent on the method of insertion used.

Aim To assess the effectiveness and clinical performance of early implant placement, 4–8 (Type 2) or 12–16 weeks (Type 3) after extraction, in single anterior sites. Methods Studies reporting on Type 2 and Type 3 implant placement were identified. Findings were summarized in evidence tables. Main outcome was implant survival. Peri‐implant soft and hard tissues changes, periodontal parameters, aesthetics and patient‐reported outcomes were also evaluated. Quality of reporting of the included studies was evaluated through Consort, Newcastle–Ottawa scale and IHE quality appraisal checklist. Results Nineteen eligible articles (seven from one RCT, three from two CCTs and nine from three case series) reporting on 140 patients and 140 implants were included. Type 3 implants showed comparable results to Type 4: 95% vs. 100% survival rates. Studies reported high values of implant survival, minimal technical and biological complications and high aesthetic scores in both short and long‐term follow‐ups for both Type 2 and Type 3 implant placement. Quality evaluation highlighted important weaknesses in the included trials. Conclusions Limited data on Type 2 and Type 3 implant placement appear to indicate that they can perform well both short and long term. However, the limited number of cases, the significant heterogeneity of the included studies and the high risk of biases importantly reduce the generalizability of the findings. CRD42018117363.

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Objective The aim of this study was to evaluate the correlation among age, gender and the number of temporomandibular disorder (TMD) findings. Methods The records from 228 patients with TMD were analyzed for the presence of these findings: morphological changes, disc displacement with reduction (DDWR) and without reduction (DDWOR), bone edema, effusion, and avascular necrosis. Statistical analyses were conducted using multinomial regression with a 5% significance level. Results DDWR was the most frequent finding. Group 1 was composed of 94 patients (41.22%), Group 2, of 67 patients (29.38%), and Group 3, of 67 patients (29.38%). Men were significantly less likely to belong to Group 3 than women (p = 0.5517). Older patients were slightly more likely to fall in Groups 2 and 3 than in Group 1. Discussion Women were shown to be more susceptible to developing a higher number of concomitant conditions than men, and the number of findings tended to increase with age.