Dental Implant Placement:
Step-by-Step Clinical Protocol

Patient Assessment & Medical History

Conduct a full systemic review, focusing on conditions that directly alter osseointegration or wound healing. Document any of the following as absolute or relative contraindications:

• Uncontrolled diabetes: HbA1c >8% significantly increases peri-implant infection risk and impairs bone healing. Defer until glycemic control is achieved.
• Active chemotherapy / head-neck radiation: Hypovascular bone and immunosuppression are incompatible with predictable osseointegration. Obtain oncologist clearance; consider HBO therapy for radiated sites.
• IV bisphosphonates (zoledronic acid, pamidronate): Absolute contraindication. Oral bisphosphonates at low dose require a drug holiday >3 months and informed consent for MRONJ risk.
• Heavy smoking (>20 cigarettes/day): Doubles implant failure rate and sixfolds peri-implantitis incidence. Strongly advise cessation; document counseling.
• Uncontrolled bleeding disorders / anticoagulation: Check INR if on warfarin (target <3.0 for minor oral surgery). Do not discontinue anticoagulants without hematologist consult.

Assess parafunctional habits (bruxism, clenching) as these amplify implant-level stress and may necessitate night-guard fabrication and modified occlusal scheme before definitive restoration.

Clinical Oral Examination

Evaluate bone quantity and quality by inspection and probing at the implant site. Map the existing soft tissue architecture: width of keratinized tissue (minimum 2 mm preferred), tissue thickness, and biotype. Record occlusal relationships, opposing teeth, and inter-arch space available for the planned restoration.

Imaging & Digital Planning

A periapical radiograph provides initial screening but is insufficient for three-dimensional planning in most posterior sites. Reserve the full CBCT protocol for cases with complex anatomy.

Use virtual implant planning software (Simplant, DTX Studio, coDiagnostiX) to overlay the proposed implant on the CBCT volume. Define the ideal prosthetic position first — place the implant axis through the functional cusp tip — then confirm adequate bone envelopes exist around that position. Fabricate a mucosa-supported or tooth-supported surgical guide for fully guided or partially guided placement.

Treatment Planning Decisions

Finalize implant selection and the loading protocol before the day of surgery. Key parameters:

• Diameter: Bone width minus 1.5 mm on each side. Example: 7 mm ridge → maximum 4.0 mm diameter implant (7 – 1.5 – 1.5 = 4.0). Preserve the cortical plates.
• Length: Available bone height minus 2 mm safety margin from the inferior alveolar nerve, sinus floor, or adjacent structures.
• Connection: The Grand Morse 16° internal conical connection (Neodent GM platform) delivers platform switching and a hermetic morse taper lock — reducing micro-gaps and crestal bone loss compared to flat-top hex designs.
• Loading protocol: Determined by predicted primary stability. Document the decision: immediate loading requires ISQ ≥65 and insertion torque ≥35 Ncm in good-quality bone.

Sterile Setup

Establish a fully sterile field. Lay out the implant surgical kit in the order of use: round bur, sequential twist drills (2.0, 2.8, 3.2/3.5 mm), profile/countersink drill, depth gauge, parallel pins, implant mount, and torque wrench. Pre-fill irrigation syringe with sterile saline at room temperature — never chilled, as very cold saline can cause thermal shock to bone cells.

Have the following immediately available: suction canula, tissue retractors, periosteal elevator (Molt #9 or equivalent), 15C blade handle, and your suture material of choice.

Anesthesia

For the mandible: inferior alveolar nerve block plus long buccal injection. For the maxilla: local buccal infiltration with palatal injection. Use 2% lidocaine with 1:100,000 epinephrine as the primary agent; articaine 4% with 1:100,000 improves diffusion in maxillary bone.

Crestal Incision (Standard Open Approach)

Make a midcrestal incision along the alveolar ridge crest using a 15C blade in a single, controlled pass. Extend the incision one tooth anterior and posterior to the implant site. Raise a full-thickness mucoperiosteal flap buccally and lingually/palatally using a periosteal elevator, exposing 5–8 mm of bone on each side for adequate visibility without over-stripping periosteum from remote areas.

Add a vertical releasing incision at the mesial angle when the flap needs to be displaced significantly, ensuring it falls over sound bone — never over the proposed implant site.

Flapless Approach (Guided Surgery)

When using a fully seated, bone-supported surgical guide with confirmed accurate CBCT and digital planning, the flapless technique reduces patient morbidity and shortens surgery time. A soft-tissue punch (typically 4–5 mm diameter) removes the keratinized tissue over the planned implant position, or a trephine removes a core of mucosa.

Bone Exposure & Landmark Marking

After flap reflection, remove any remaining soft tissue tags from the bone surface with a curette. Confirm the anatomy: palpate the lingual cortex in the mandible, note the position of the mental foramen in the premolar region, and inspect the sinus floor in the maxilla. Mark the planned implant center with a round bur at low speed (500 RPM, no irrigation pressure needed at this step) — creating a small cortical dimple that anchors the pilot drill and prevents walking.

Neodent Drive GM — Immediate Loading Sequence

The Drive GM is specifically engineered for single-stage and immediate loading scenarios. Its aggressive cutting flutes and tapered apex allow placement in undersized osteotomies with predictably high primary stability.

• Reduce the final drill diameter by one size compared to the Helix GM protocol for the same implant diameter
• The self-tapping geometry compresses bone during insertion, generating ISQ values that are typically 8–12 points higher than conventional preparation
• Target: ISQ ≥65, insertion torque ≥40 Ncm for single-tooth immediate loading

Depth Verification

Before implant insertion, probe the osteotomy depth with a periodontal probe or depth gauge. For posterior maxilla cases, a periapical radiograph with the depth gauge in situ provides direct visualization of sinus floor proximity. For mandibular posterior implants, confirm the osteotomy depth is at least 2 mm short of the nerve canal position identified on CBCT.

Removing the Implant from Sterile Packaging

Open the factory-sealed double-sterile blister directly onto the sterile field without contaminating the internal packaging. The implant is delivered on an internal mount inside a protective vial — do not touch the implant body with unprotected fingers. Handle exclusively via the mount, which is designed to accept the handpiece coupling or manual wrench.

Motor-Driven Insertion

Attach the implant mount to the surgical handpiece. Set the motor to 15–25 RPM, torque limit preset to 45–70 Ncm (adjust per bone quality). Begin insertion with gentle apical pressure. The implant should engage the bone walls and advance smoothly with the motor's rotation — do not force. Continue motor-driven insertion until the implant is approximately 2 mm from its final position, then disengage the motor and switch to the manual torque wrench for the final seating.

Final Torque & Implant Positioning

Use a calibrated torque wrench for final seating. Record the insertion torque in the clinical chart — this value directly informs your loading protocol decision.

Bone-level implants should be positioned at crestal bone level or 0.5–1.0 mm sub-crestal (allows soft tissue seal above the Grand Morse connection). Tissue-level implants sit with the polished collar above the crestal bone and do not require a second-stage procedure.

Immediate Loading Protocol

When all criteria are met, place the healing abutment or multi-unit abutment (MUA) immediately. For full-arch cases (All-on-4/All-on-6), cross-arch rigid splinting with a provisional acrylic framework is mandatory — this distributes occlusal loads across multiple implants during the osseointegration window.

• Single-tooth immediate: Provide a temporary crown in slight infra-occlusion (≤50 µm gap in centric, no lateral contacts)
• Full-arch immediate: Convert the interim prosthesis or place a chair-side fabricated acrylic bridge; confirm passive fit before tightening
• Patient instruction: Soft, non-sticky diet for 4–6 weeks minimum. No biting into hard foods. Return immediately if the temporary feels "off"

Conventional Protocol (Submerged / Non-submerged)

When immediate loading is not indicated, choose between submerged (two-stage) and non-submerged (one-stage) healing based on the clinical situation:

• Submerged: Place a cover screw flush with the bone, close the flap completely, and perform second-stage exposure at 8–12 weeks (maxilla) or 6–8 weeks (mandible). Preferred when simultaneous bone grafting is performed.
• Non-submerged: Place a healing abutment above the tissue — eliminates second surgery, allows tissue maturation, but requires the flap to tent over the emerging abutment without tension.

Suture Material Selection

Match the suture material to the clinical objective:

Suture Technique & Tension Assessment

Use interrupted sutures as the primary closure technique. Place sutures 3–4 mm from the wound margin, 4–5 mm apart. The single most important rule: no tension on the wound margins. Tension causes tissue necrosis and dehiscence within 24–48 hours — exposing cover screws, grafts, or membranes to oral contamination.

To achieve tension-free primary closure when the flap needs to advance over a graft or healing abutment, score the periosteum with a horizontal releasing incision on the inner surface of the buccal flap. This extends the flap's reach by 4–8 mm without additional external incisions.

Medications

Patient Instructions

• Diet: Soft foods only for 4 weeks (eggs, yogurt, soup, soft fish, mashed vegetables). Avoid hard, crunchy, or sticky foods throughout the osseointegration period.
• No smoking: Critical. Tobacco use quadruples early implant failure risk. Advise minimum 6–8 weeks abstinence post-surgery. Document compliance at follow-up.
• Oral hygiene: Normal brushing of remaining teeth starting day 1, avoiding the surgical site. Gentle rinsing only for the first 24h. Resume gentle implant site cleaning with a soft brush at day 3.
• Activity: Avoid strenuous exercise for 48 hours — cardiovascular exertion raises blood pressure and risks post-operative bleeding. No swimming, scuba diving, or flying pressurized aircraft for 48 hours.
• When to call: Fever >38.5°C, severe pain not controlled by prescribed NSAIDs, progressive swelling after day 3, implant feeling loose, or any unusual discharge.

Impression / Digital Scan Workflow

Connect a transfer coping (open-tray) or scan body to the implant. For digital workflows, intraoral scanning with the corresponding GM scan body (Neodent digital library) eliminates plaster models and reduces laboratory turnaround. Send the STL file to the laboratory with a shade prescription and clear definition of the restoration design (screw-retained vs. cement-retained, emergence profile, material choice).

For conventional impressions, use open-tray technique with a custom or stock perforated tray. Polyvinyl siloxane or polyether provides adequate accuracy for implant-level impressions.

Abutment Seating

Select the appropriate abutment height based on the soft tissue thickness at the implant site (measured with a depth gauge probe through the tissue). The abutment margin should emerge 0.5–1.0 mm below the gingival margin.

For the Neodent GM platform, the multi-unit abutment (MUA) is the standard for screw-retained prostheses. Tighten the MUA to 32 Ncm using the calibrated torque wrench. The Grand Morse taper self-locks the abutment into the implant body — creating a hermetic seal that prevents bacterial micro-leakage at the prosthetic interface without relying on screw clamping force alone.

Final Restoration Delivery

Screw-retained restorations are the preferred standard — they are fully retrievable, eliminating the biologic risk of residual sub-gingival cement. Cement-retained restorations may be indicated when implant angulation precludes an acceptably positioned screw access hole, but require extreme care to ensure complete cement removal.

Before final delivery, verify:

• Passive seating: no rocking, no gaps at implant-abutment or abutment-crown interface
• Occlusion: even centric contacts, no premature contact in centric relation, no lateral interferences in working or balancing movements
• Emergence profile: convex tissue-contacting surface that supports the peri-implant soft tissue and facilitates oral hygiene
• Interproximal contacts: firm but flossable — too tight risks micro-fractures in the ceramic; too loose leads to food impaction

Torque the final screw to the manufacturer's specification, apply cotton pellet and composite over the access hole, and document the case with a final periapical radiograph in the clinical record.