A case report of same-day denture repair using magnetic attachments
M. MASUDA, M. SONE, Y. OKAWA, S. SOMEKAWA, A. MATUI, H. HAMASAKA, Y.
TOYOTA, F. OKUTSU, T. MATSUKAWA, K. OKAMOTO and S. OHKAWA
Division of Removable Prosthodontics, Department of Restorative and Biomaterials Sciences, Meikai
University School of Dentistry
Abstract
We report clinical uses of magnetic attachments for the repair of dentures and retainers on the same day.
This report describes three clinical cases. In all cases, the abutment teeth that act as retention elements forthe dentures were detached due to secondary caries, and, without abutment teeth, retention was extremelypoor. The patients were dissatisfied with the dynamic stability and retention of their dentures. Therefore,keepers of the magnetic attachments were fixed with composite resin material to the remaining radicularteeth, and magnetic assemblies were attached to the dentures. The magnetic attachments used wereMAGFIT® RKR (AICHI STEEL, Japan) in cases 1 and 2 and GIGAUSS® (GC, Japan) in case 3.
As a result, patients’ complaints of functional dissatisfaction were resolved.

IntroductionMagnetic attachments that have the unique feature of “retention without bracing” protect abutments fromexcessive force1). Thus, the magnetic attachments can be applied to damaged crowns and short roots2). We
report the clinical use of dental magnetic attachments for abutments damaged by secondary caries and, on
the same day, denture repair.

Case 1
Clinical History: The patient, a 66-year-old female, complained of masticatory dysfunction. The patient
had a partially edentulous maxilla and mandible (Eichner B3). At the initial examination, a fixed bridge on#7, 8, and 9 as abutment teeth for removable partial denture was detached, and #7 was found to have beendamaged by caries. The patient was dissatisfied with the dynamic stability and retention of the denture(Fig.1–3).
Treatment Procedure: The fixed bridge was cut off between #8 and #9, and the magnetic attachments thatact as retention elements were applied to the remaining radicular tooth of #7. MAGFIT® RKR (AICHISTEEL, Japan) magnetic attachments were used in this case. Keepers of the magnetic attachment werefixed with adhesive resin cement on the abutment teeth (G-CEM LinkAce, GC, Japan). Then, the magnetic
assembly was attached to an additional tooth (Zen Opal Shell, GC, Japan) by denture repair (Fig.4). As aresult, the patient’s complaints of functional dissatisfaction were resolved (Fig.5).

Fig.1 Intraoral view after amputation ofbridge

Fig.2 Dental radiograph
at #7

Fig.3 Previous dentureabcdef

Fig.4 Treatment procedure of the magnetic attachment(a. preparation of root, b. magnetic attachment,c. seating of the keeper, and d–f. seating of the magnetic assembly)

Fig.5 Intraoral view after prosthetic treatment

Case 2Clinical History: The patient, a 77-year-old female, complained of masticatory dysfunction. The patient
had a mandibular overlay complete denture. At the initial examination, a magnotelescopic crown of #22, as
the abutment tooth for a removable partial denture, was detached (Fig.6). The patient was dissatisfied withher retention of the denture and demanded immediate recovery of function.
Treatment Procedure: Magnetic attachment (MAGFIT® RKR, AICHI STEEL) that act as retention
elements was applied to the remaining radicular of tooth #22 (Fig.7). As a result, the patient’s complaintsof functional dissatisfaction were resolved.

Fig.6 Intraoral view and dental radiographof #22 at the initial examination

Fig.7 Intraoral view and denture
after prosthetic treatment

Case 3Clinical History: The patient, a 65-year-old male, had a partially edentulous mandible (Eichner B1:
missing mandibular second premolar and first molar teeth) with the chief complaint of masticatory
dysfunction. All maxillary prostheses had failed, with a marginal discrepancy and caries damage (Fig.8 and9).
Treatment Procedure: First, the prostheses with marginal discrepancies were removed, and the #6, 7, and 8
teeth were extracted due to severe caries and periodontitis. Then, an immediate denture in the maxilla wasset on a portion of the edentulous area(Fig.10). The magnetic attachments that act as retention elements
were applied to the remaining radicular teeth (#3, 10, and 11). GIGAUSS D400® (#10 and #11 teeth) andGIGAUSS D1000® (#3 tooth) (GC, Japan) magnetic attachments were used in this case. Keepers of themagnetic attachment were fixed with adhesive resin cement on the abutment teeth (Multilink® Automix,Ivoclar Vivadent, Liechtenstein) (Fig.11). As a result, the patient’s complaints of functional dissatisfaction
were resolved immediately.

Fig.8 Intraoral view at the initial examination

Fig.9 Dental radiographs
at the initial examination

Fig.10 Intraoral view with an immediate denture

Fig.11 Seating of keepers on the abutment teeth

Conclusion
A magnetic attachment could be provided as a useful retentive appliance for alleviating patient complaints
regarding function. In the interval, the remaining dentition, periodontal condition, and retentive forces ofthe prostheses have been examined as part of a maintenance program.

References1.
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