Implications of Virtual CBCT-Based Immediate Implant Planning for Maxillary and Mandibular First Molars

Area of Science:

• Dental Implantology
• Oral and Maxillofacial Surgery
• Radiology

Background:

• Immediate dental implant placement offers functional and aesthetic benefits.
• First molar extraction and replacement present unique anatomical challenges.
• Virtual planning using cone-beam computed tomography (CBCT) aids in predicting outcomes.

Purpose of the Study:

• To virtually assess ridge-implant dimensions for immediate first molar replacement.
• To evaluate implant suitability in the mandible (Md1) and maxilla (Mx1) using CBCT.
• To determine optimal implant diameter and angulation for immediate placement.

Main Methods:

• CBCT scans of 41 patients with first molars were analyzed.
• Ten-millimeter-long cylindrical implants of varying diameters were virtually superimposed.
• Alveolar ridge height, width, gap distance, and crestal bone levels were measured.

Main Results:

• Mean alveolar ridge height differed significantly between maxilla (7.13 mm) and mandible (15.64 mm).
• 87.8% of sites had >2 mm gap with 6mm diameter implants.
• Increasing implant diameter reduced available ridge width, necessitating grafting.

Conclusions:

• Immediate first molar implant placement, particularly in the maxilla, demands thorough presurgical assessment.
• Implants up to 6mm wide may be suitable if interradicular space is grafted.
• Further clinical studies are required to validate these virtual findings.