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Narrow Diameter Implant in Posterior Mandible

The team at Shenzhen University General Hospital 3D printed a surgical guide for a Narrow Diameter Implant in Posterior Mandible.

Case information

Physical exam: 46 missing, the alveolar was blade-shaped, the mucosal color was normal, and the width of the keratinized gingiva on the cheek and lingual crest was about 2mm. The gap in the missing area is normal, 47 is mesial-inclined, loose (-), the antagonist is normal, and the occlusal gap is normal.

Auxiliary exam: CBCT showed no sever alveolar bone resorption in the 46 missing area, and the top of the alveolar ridge is 19.89 mm away from the inferior alveolar nerve tube, with the medium bone. The adjacent teeth had no periapical lesions, and the alveolar bone had no abnormal lesions.

Diagnosis: dentition defect

Treatment plan: 46 implant restoration

Case source : Shenzhen University General Hospital

Pre-op photo of the patient before the Narrow Diameter Implant in Posterior Mandible surgery

Workflow

 1. Preoperative CT

  • Pre-operative CT for the Narrow Diameter Implant in Posterior Mandible surgery
    Panoramic X-ray
  • Implant area

2. Intraoral Scan

Acquire data with SHINING 3D’s Aoralscan intraoral scanner

  • Intraoral scan for the surgical guide of the Narrow Diameter Implant in Posterior Mandible surgery

3. Surgical Plan

Tooth position: #46
Diameter of implant: 3.70mm
Extend length of drill: 8.50mm
Length of implant: 11.50mm
Drill depth: 20.00mm
Diameter of implant tip: 2.50mm
Extend length of drill: 8.50mm
Gingiva incision: 3.70mm
Pin/handle: D2.0/L20.00

 4. Print model & guide with AccuFab-D1

  • 3D printed model for Narrow Diameter Implant in Posterior Mandible surgical guide
    Printed model
  • Printed guide
  • Try-in on the printed model

5. Surgical procedure

Preoperative photo

Position the surgical guide, then incise gingiva and drill pilot hole. Check depth and condition of pilot hole.

  • The 3D printed surgical guide for Narrow Diameter Implant in Posterior Mandible

Profile drill for implant. Insert the implant.

Seat the implant. Fix the implant by torque wrench.

Place the healing cap.

Placing the healing cap for the Narrow Diameter Implant in Posterior Mandible surgery

Postoperative photo

Post-op photo of the Narrow Diameter Implant in Posterior Mandible

6. Postoperative CT

Post-operative CT of the Narrow Diameter Implant in Posterior Mandible.

Summary

Severe bone resorption at the buccal and lingual, along with narrow mesiodistal space is unfavorable for manual implantation. The use of surgical guide ensure the position and depth of drill hole, benefiting the accuracy and safety of this Narrow Diameter Implant in Posterior Mandible surgery.