Objectives: The one-abutment-one-time protocol has been proposed to improve peri-implant tissue stability by minimizing repeated abutment manipulation. This systematic review and meta-analysis evaluated the effect of one-abutment-one-time compared with repeated abutment disconnections on peri-implant marginal bone loss and secondary clinical outcomes in platform-switched, conical-connection dental implants.

Material and Methods: A PRISMA-guided systematic review of randomized controlled trials published between 2018 and 2025 was conducted. Studies included adult patients restored with bone-level, platform-switched implants with an internal conical connection. Marginal bone loss (MBL) was the primary outcome; probing depth (PD), implant survival, and biological and prosthetic complications were secondary outcomes. Meta-analyses were performed using random-effects models.

Results: Seven randomized controlled trials were included. All studies reported numerically lower MBL with one-abutment-one-time (OAOT). Pooled analysis of six parallel-group trials demonstrated a statistically significant reduction in MBL favouring OAOT (mean difference -0.23 mm; 95% CI = -0.44 to -0.02). No significant differences were observed for PD. Implant survival rates were high and comparable between protocols, and complication rates were low with no consistent intergroup differences.

Conclusions: The one-abutment-one-time protocol is associated with a modest but consistent reduction in peri-implant marginal bone loss in platform-switched, conical-connection implants, without clear benefits for other peri-implant clinical outcomes.

Objectives: The aim of this systematic review was to evaluate and compare the clinical outcomes of peri-implant soft tissue augmentation using xenogeneic collagen matrices and autogenous subepithelial connective tissue grafts in single-tooth implant therapy. The review focused on key clinical parameters, including marginal bone loss, soft tissue thickness gain, mid-buccal recession, and aesthetic outcomes assessed by the pink aesthetic score.

Material and Methods: This systematic review was conducted following PRISMA guidelines. A comprehensive electronic search was performed in MEDLINE (PubMed), ScienceDirect, and the Cochrane Library for studies published between November 18, 2015, and November 18, 2025. Eligible studies included randomized controlled trials, prospective clinical trials, and cohort studies evaluating peri-implant soft tissue augmentation using xenogeneic collagen matrices compared with autogenous subepithelial connective tissue grafts. Study quality and risk of bias were assessed using the Joanna Briggs Institute Critical Appraisal Checklist.

Results: A total of 839 records were identified, of which six studies met the inclusion criteria. Both treatment modalities demonstrated favourable clinical outcomes. Marginal bone loss was generally limited, with no consistent statistically significant differences between groups, although one study reported greater bone loss in the xenogeneic group. Soft tissue thickness gain showed a trend favouring autogenous grafts. Mid-buccal recession data were limited but suggested slightly greater recession in the xenogeneic group. Aesthetic outcomes were comparable between groups.

Conclusions: Both treatment modalities are effective; however, autogenous grafts provide more consistent soft tissue thickness gain, while collagen matrices represent a viable alternative with comparable aesthetic and bone outcomes.

Objectives: This literature review evaluates the differences between triangular and circular neck designs and their influences on marginal bone remodelling as well as peri-implant hard and soft tissue health. The primary aim was to compare implant survival and hard-tissue outcomes (peri-implant bone level, implant stability quotient and insertion torque). The secondary aim was to compare soft-tissue outcomes (probing depth, bleeding on probing, plaque index and full-mouth plaque score).

Material and Methods: The literature review followed PRISMA statement and used a PICOS-based focus question. An extensive search was conducted in MEDLINE (PubMed), Embase, Cochrane Library and Web of Science for studies published between December 1, 2015, and December 1, 2025. Inclusion criteria focused on human adult clinical studies, triangular vs circular neck implants, ≥ 3 months follow-up, and reporting at least one relevant clinical/radiographic parameter. Study risk of bias was assessed using the Joanna Briggs Institute Checklists.

Results: From 2999 identified records, 5 studies were included, comprising a total of 86 patients with follow-up ranging from 3 to 60 months. All studies compared triangular and circular neck implants. Implant survival was 100% in all studies. No significant differences were found in insertion torque, implant stability quotient and soft-tissue parameters. Two studies reported significantly lower (P ≤ 0.05) peri-implant bone level with triangular neck implants, while others found no significant differences.

Conclusions: The results indicate that triangular and circular implant neck designs demonstrate comparable clinical performance, with no clear differences in implant survival, insertion torque, implant stability quotient, and in soft-tissue outcomes. Peri-implant bone level may be lower with triangular neck implants in some settings, but findings are inconsistent across studies and limited.

Objectives: This randomized controlled trial aimed to assess whether structured dietary interventions, implemented both before and after orthognathic surgery, could minimize postoperative weight loss during the first eight weeks.

Material and Methods: The study was conducted between April 2017 and April 2022, involving patients undergoing singleor bimaxillary surgery. Participants were randomly allocated into three groups: intervention 1 (nutritional tube feeding), intervention 2 (oral intake nutritional supplements), and control (standard care). Body composition was assessed using a body composition analyser (Tanita BC-418) at five time points: presurgery examination, admission, and follow-ups weeks 1, 3, and 8. Primary outcome was weight; secondary - BMI, fat mass, fat-free mass, total body water, and visceral fat rating. Compliance was assessed from patient questionnaires and hospitalization records based on adherence to the prescribed nutritional intake before and after surgery.

Results: In total 150 patients were included, without statistically significant differences in age (28.6 [SD 10.4] years, P = 0.7) and BMI (24.9 [SD 5.6], P = 0.72). All groups experienced significant weight loss postoperatively (week 1: P < 0.001; week 3: P < 0.001; week 8: P < 0.001), with control showing slightly greater loss at week 8 (-3.03 kg vs. -2.18 and -2.67 kg; P = 0.11). Compliance during hospitalization was higher in intervention 1 (71.8%) than intervention 2 (55.1%; P = 0.02). No significant differences were found in body mass index or body composition changes.

Conclusions: There was no statistically significant effect of systematic dietary interventions versus standard care on postoperative weight loss or body composition after orthognathic surgery. Higher adherence did not improve clinical outcomes.

Objectives: Endodontic microsurgery in the mandibular molar region is associated with significant clinical challenges when large periapical cystic lesions are located near the inferior alveolar nerve. The purpose of this case report is to describe the clinical management and outcomes of a patient presenting with a cystic lesion in close proximity to the inferior alveolar nerve, illustrating the importance of advanced imaging in treatment planning and risk assessment.

Material and Methods: A 45-year-old female with persistent pain related to mandibular first molar previously treated with root canal therapy and restored with a metal-ceramic crown underwent radiographic and cone beam computed tomography examinations. A well-defined cystic lesion in direct contact with the inferior alveolar nerve was identified. Preoperative planning guided the surgical approach, which included elevation of a full-thickness mucoperiosteal flap, osteotomy, root-end resection, removal of a separated instrument, careful cyst enucleation to avoid nerve injury, ultrasonic root-end preparation, and retrograde obturation using a calcium silicate-based material. The surgical site was closed with 4-0 polypropylene sutures (Prolene^® - Ethicon, Inc.).

Results: At the three-month follow-up, the patient reported resolution of pain and absence of neurosensory disturbances. Radiographic imaging indicated favourable early bone healing of the surgical site.

Conclusions: Careful preoperative evaluation with cone beam computed tomography and meticulous microsurgical techniques are essential for mitigating risks and achieving successful outcomes in the management of periapical cysts adjacent to the inferior alveolar nerve. Clinicians should consider ongoing clinical and radiographic monitoring to evaluate long-term success following surgical intervention.