Demonstration: Two-Sectioning and Buccal Bone Removal
Procedure Overview
This document summarizes the technique for performing two-sectioning and conservative buccal bone removal in surgical extractions. The objectives are to create adequate space for instruments or to allow tooth segments to rotate out while preserving buccal bone height and minimizing trauma.
Preoperative Considerations
- Reflect the mucoperiosteal flap securely to expose the surgical site and prevent soft-tissue trauma during instrumentation.
- Plan your approach before initiating bone removal:
- Identify the direction of tooth rotation or instrument access required.
- Determine the minimal amount of bone necessary to achieve access.
- Ensure availability of appropriate instruments and irrigation.
Instruments and Equipment
- Flat Fischer surgical bur (recommended for bone removal)
- Straight handpiece (for bur use)
- High-volume irrigation (sterile saline or appropriate coolant)
- Standard flap reflection instruments and retractors
Suggested equipment-position table:
| Instrument / Item | Recommended Use | Positioning / Notes |
|---|---|---|
| Flat Fischer surgical bur | Conservative bone removal, smoothing | Use in a straight handpiece; appropriate for buccal bone contouring |
| Straight handpiece | Hold the bur and control cutting | Hold as close as possible to the long axis of the tooth |
| Irrigation (saline) | Cool bone, prevent thermal necrosis | Continuous irrigation during bone cutting |
| Retractors / flap instruments | Secure flap reflection | Maintain atraumatic soft-tissue handling |
Technique — Step-by-Step
- Reflect and secure the flap to provide clear access and protect soft tissues.
- Confirm your planned access and the minimal bone that must be removed to allow either instrument access or tooth rotation.
- Fit the flat Fischer surgical bur to a straight handpiece.
- Position the handpiece close to the long axis of the tooth to reduce loss of vertical height of the buccal bone.
- Begin bone removal with steady, controlled movements and continuous irrigation to avoid thermal damage.
- Progress decisively once cutting has started—create sufficient space for intended instrument manipulation or for rotation/sectioning of the tooth.
- Reassess frequently to avoid excessive bone removal and to preserve structural integrity.
Key Technical Tips
- Hold the handpiece as close to the tooth’s long axis as feasible to minimize vertical bone loss on the buccal aspect.
- Maintain continuous irrigation during bone cutting to prevent thermal necrosis of bone.
- Be decisive in bone removal: undercutting or intermittent, hesitant cutting can prolong surgery and increase risk of complications.
- The goal is to remove only the bone necessary to permit either instrument access or tooth rotation—preserve as much buccal height as possible.
Risks and Complications
- Thermal necrosis of bone if irrigation is inadequate.
- Excessive loss of buccal bone height if the handpiece is angled incorrectly or overzealous bone removal occurs.
- Soft-tissue trauma if the flap is not properly reflected or retracted.
Checklist Before Bone Removal
- Flap adequately reflected and secured
- Flat Fischer bur properly seated in straight handpiece
- Handpiece alignment checked (close to tooth long axis)
- Irrigation ready and functioning
- Clear plan for extent and orientation of bone removal
Summary
Successful two-sectioning and buccal bone removal rely on careful planning, atraumatic flap reflection, precise handpiece alignment (close to the tooth’s long axis), decisive and conservative bone removal, and continuous irrigation to prevent thermal injury. These steps create the required space for instruments or tooth rotation while aiming to preserve buccal bone height and minimize complications.