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The study involved patients receiving maxillary and mandibular full dentures 6-8 weeks before implant insertion. A total of 20 implants were inserted in each patient's B and D areas, with a magnetic field incorporated into the denture. The strength of the magnetic field was measured and analyzed. After three months, patients received an implant-retained mandibular overdenture with ball attachments, completing the rehabilitation treatment.

Magnetic Field Affecting Bone Healing (4)

author: Andreas Tjandra | publisher: drg. Andreas Tjandra, Sp. Perio, FISID

After explaining the study's specifics, all patients provided written and informed consent. A medical questionnaire was used to collect a detailed history of the subjects, and a clinical oral examination was undertaken. Routine laboratory examinations were performed and documented for all individuals.

Maxillary and mandibular full dentures were made for all patients 6 to 8 weeks prior to implant insertion. To ensure proper implant insertion, a surgical stent was created by duplicating the mandibular denture. The anterior mandible's interforaminal area is separated into five evenly distributed locations. These five sites serve as primary implant sites and are labeled A, B, C, D, and E, beginning on the patient's right side. A total of 20 implants (Tidal Spiral Dental Implant Systems Huntsville, USA) were inserted in each patient's B and D areas, with the option of obtaining more implant support in the future [Table/Fig-1].

To reduce inter-operator variability, all implants were put at the alveolar crest level with no bone augmentation or expansion operations performed by a single operator. This became a split mouth research since the control and experimental groups were the same. The appeal of this split mouth design was that it eliminated a lot of inter-individual variability, resulting in reduced bias. The primary implant stability was assessed immediately after implant placement (at 0 day) at both locations using RFA [27], following which healing abutments were installed and soft tissues were readapted and sutured. The mandibular complete denture was relieved at the D region site, and a circular, isotrophic Neodymium-Iron-Boron static magnet of 4.2mm diameter and 2.85mm length that maintained a flux of 500 Guass at a distance of 3.5mm from the surface was incorporated into the denture [Table/Fig-2], and the patients were instructed to wear the denture for 12-15 hours per day.

The strength of the magnetic field was measured using an Axial Hall Probe and plotted [Table/Fig-3] as a function of distance from the surface of the magnet used in this investigation. The flux drops exponentially with distance. To avoid direct contact between the magnet and the healing abutment, soft liner material was left in place at the magnet's location. Recall was performed after one day to assess wound management and after seven days to remove the sutures. Secondary implant stability was assessed by RFA on both B (not exposed to magnetic field) and D (exposed to magnetic field) areas at days 30, 60, and 90 [Table/Fig-4]. Following the three-month research period, all patients received an implant-retained mandibular overdenture with ball attachments, completing the rehabilitation treatment.


Summary

Study on Dental Implants

• Patient consent was obtained through a medical questionnaire and clinical oral examination.
• Regular laboratory examinations were conducted.
• Patients received maxillary and mandibular full dentures 6-8 weeks before implant insertion.
• A surgical stent was created to ensure proper implant insertion.
• Five primary implant sites were identified: A, B, C, D, and E.
• A total of 20 implants were inserted in each patient's B and D areas.
• All implants were placed at the alveolar crest level to reduce inter-operator variability.
• Primary implant stability was assessed immediately after implant placement.
• A circular, isotrophic Neodymium-Iron-Boron static magnet was incorporated into the denture.
• Patients were instructed to wear the denture for 12-15 hours per day.
• The strength of the magnetic field was measured and plotted.
• Soft liner material was left in place to avoid direct contact with the magnet.
• Secondary implant stability was assessed at days 30, 60, and 90.
• After three months, all patients received an implant-retained mandibular overdenture with ball attachments.

 

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  • Magnetic Field Affecting Bone Healing (4)

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