Geristore Syringeable (6 mo)

Consultants’ Comments

• “Cement is very versatile.”
• “The viscosity of Geristore Syringeable is low enough to allow restorations to seat easily.”
• “Little sensitivity during cementation.”
• “The fluoride makes it great for patients with high caries rate.”

Description

Geristore Syringeable is a dual-cured, multi-use, hybrid ionomer restorative material. Suggested applications for Geristore Syringeable include cervical restorations, interim fillings, base/liner, cementation of metal-based restorations, and luting of orthodontic brackets and bands. Other characteristics include biocompatibility, fluoride release, low coefficient of thermal expansion, and low polymerization shrinkage. The starter kit contains one dual-barrel syringe with 15 automix and intraoral tips.

Clinical Evaluation Protocol

• 100 restorations were cemented with Geristore Syringeable. Restorations included ceramic-metal and gold crowns, bridges and inlays/onlays (Figure 1).
• Sensitivity was rated at one week and six months after placement.
• Categories evaluated included:
  • Handling
  • Sensitivity at one week post-placement
  • Sensitivity at six months post-placement
  • Microleakage
  • Retention of restoration
• Categories were rated on a 1-5 scale:
  1 = poor, 2 = fair, 3 = good, 4 = very good, 5 = excellent.

Figure 1

Clinical Observations

Handling
Consultants found Geristore Syringeable very easy to use for luting indirect restorations. The dual-barrel syringe with mixing tip dispenses the material neatly and directly into the restoration or the tooth. The short tip provides adequate mixing of the base and catalyst without excessive waste. The medium viscosity of Geristore Syringeable allows seating of the restorations with light pressure. Excess cement is easily removed after a two-second “flash” cure at the margins.

Post-operative Sensitivity – at One Week
Little sensitivity was noted after cementation. Ninety-five percent of restorations were sensitivity-free. Five percent of restorations were noted to have mild, transient sensitivity. Only two patients reported sensitivity at one week. Both patients described this as slight sensitivity to cold. Postoperative sensitivity can arise from a variety of factors, some of which may include tooth preparation, condition of tooth prior to preparation, microleakage or irritation from the permanent cement.

Post-operative Sensitivity – at Six Months
Only one patient reported sensitivity when questioned at six months after cementation of the permanent restoration with Geristore Syringeable. One patient experienced a dull ache over a period of time, necessitating the removal of the crown. This was not necessarily a result of using the particular cement.

Microleakage
Microleakage was not observed in any of the restorations during the evaluation period.

Retention
One posterior ceramic-metal crown cemented with Geristore Syringeable debonded at six months. No other debonding occurred.Editors’ Note: The manufacturer recommends using Tenure A/B bonding agent to maximize retention and seal tubules on teeth under high stress or those that required aggressive preparation.