A 1-year prospective study on Co-Axis implants immediately loaded with a full ceramic crown

Area of Science:

• Dental Implantology
• Prosthodontics
• Periodontology

Background:

• The Co-Axis implant features a 12-degree angled neck to address angulation challenges in dental implant placement.
• Immediate loading protocols are increasingly utilized to shorten treatment times in restorative dentistry.

Purpose of the Study:

• To evaluate the clinical outcomes of the Co-Axis implant system after 1 year of function.
• To assess bone loss, peri-implant soft tissue health, and aesthetic results following immediate loading with a full ceramic crown.

Main Methods:

• Fifteen Co-Axis implants were placed in the premaxilla of 14 patients and immediately loaded with screw-retained full ceramic crowns.
• Bone loss was measured via periapical radiographs; soft tissue changes, plaque, and bleeding indices were assessed.
• Patient satisfaction was evaluated using the Oral Health Impact Profile-14 (OHIP-14) questionnaire.

Main Results:

• All implants achieved 100% survival at 1 year, with mean bone loss of 1.20 mm, stabilizing after 6 months.
• Low plaque levels were maintained; bleeding on probing decreased initially and remained stable.
• Four instances of screw loosening and one porcelain chip occurred; midfacial recession was 0.37 mm, with minor papilla changes.

Conclusions:

• The Co-Axis implant system demonstrated favorable clinical outcomes with immediate loading, evidenced by 100% implant survival and stable bone levels.
• Full ceramic crowns provided good aesthetic results, though soft tissue stability, particularly midfacial recession, required 1 year for assessment.
• Despite minor complications like screw loosening, patient-reported outcomes indicated increased well-being.