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Eur Arch Otorhinolaryngol. 2019 Feb;276(2):349-356. doi: 10.1007/s00405-018-5228-5. Epub 2018 Dec 7.

Wide diameter bone-anchored hearing system implants: a comparison of long-term follow-up data between tissue reduction and tissue preservation techniques.

Author information

1
Department of Otorhinolaryngology, Head and Neck Surgery and Audiology, Rigshospitalet, Copenhagen University Hospital, Blegdamsvej 9, 2100, Copenhagen, Denmark. Martin.reznitsky@gmail.com.
2
Department of Ear, Nose, Throat and Maxillofacial Surgery, Zealand University Hospital, Lykkebaekvej 1, 4600, Køge, Denmark. Martin.reznitsky@gmail.com.
3
Department of Otorhinolaryngology, Head and Neck Surgery and Audiology, Rigshospitalet, Copenhagen University Hospital, Blegdamsvej 9, 2100, Copenhagen, Denmark.

Abstract

OBJECTIVE:

To present long-term data on the Wide Ponto implant bone-anchored hearing system (BAHS) in regards to implant stability, soft tissue reaction and implant loss for two case series undergone either the tissue reduction- or the tissue preservation surgical technique.

METHODS:

Comparison of two consecutive, prospective case series. Each case series enrolled 24 patients. The case series underwent one-stage implantation of the Wide Ponto implant BAHS using either a linear incision technique with subcutaneous reduction or a linear incision technique without subcutaneous reduction. Implant stability quotient (ISQ) values were measured using resonance frequency analysis and soft tissue reactions were graded according to Holgers' classification system. Follow-up visits were performed at 10 days, 6 weeks, 6 months, 12 months and annually up to 4 years (tissue preservation) or 5 years (tissue reduction) postoperatively.

RESULTS:

The two case series had homogenous patient populations and followed an identical postoperative scheme. The ISQ values increased consistently the first 12 months for both groups (p ≤ 0.001), and were higher in the tissue preservation case series, (p = 0.04, 9 mm abutment). More than 91% of the soft tissue observations were assessed as Holgers' grade 0 or 1. One implant (2.1%) was lost due to trauma.

CONCLUSION:

In both case series, the Wide Ponto implant showed increasing implant stability during the follow-up period from the time of surgery, irrespective of surgical technique, indicating good osseointegration. Soft tissue reactions were rare and of minor severity. Implant survival was high.

KEYWORDS:

Bone-anchored hearing systems; Implant stability quotient; Osseointegration; Soft tissue and skin reaction; Tissue reduction/preservation surgery; Wide implant

PMID:
30535539
DOI:
10.1007/s00405-018-5228-5

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