[Three years experience with ionomer cement in reconstructive middle ear surgery]

Reconstructive middle ear surgery often requires durable and biocompatible materials for implantation. Prior research has shown that traditional materials used in ossicle chain reconstruction face challenges such as extrusion or tissue rejection. This gap motivated the search for an alternative material that could maintain structural integrity while minimizing adverse biological reactions. The need for a substance that supports tissue integration without causing inflammation remained unmet. No prior work had resolved the long-term stability of implants in the middle ear environment. The development of ionomer-based materials offered a potential solution. This paper's contribution lies in evaluating the clinical performance of polymaleinate ionomer over a three-year period. The study addresses the need for a reliable implant material in reconstructive ear surgery.

The aim of this study was to assess the clinical utility of polymaleinate ionomer implants in reconstructive middle ear surgery. The researchers focused on evaluating the material's biocompatibility and long-term stability. A specific problem addressed was the risk of extrusion and tissue reaction associated with other implant materials. The motivation for this study stemmed from the need to reduce the frequency of revision surgeries. The study also aimed to determine the material's suitability for both adult and pediatric patients. The researchers sought to compare the outcomes of using ionomer implants with those of traditional materials. The study design allowed for a detailed follow-up period of up to 18 months. The goal was to provide evidence for the material's effectiveness in middle ear reconstruction.

The study involved the use of polymaleinate ionomer implants in 156 middle ear reconstructions. Implants were shaped using a diamond drill to fit the anatomical requirements. The material was tested in both adult and pediatric patients with varying degrees of ear canal damage. The surgical approach varied depending on the patient's age and the extent of cholesteatoma. In children, the dorsal wall of the ear canal was removed to improve sanitation. In adults, the ear canal was reconstructed to prevent resonance-related hearing loss. The implants were covered with a flap of periosteum and connective tissue to promote integration. Histological examination was conducted to assess tissue response and implant integrity.

Out of 156 implants, only one required removal for a second-look operation in a cholesteatoma case. No instances of extrusion or tissue rejection were observed during the follow-up period. Histological analysis showed that the implants were covered by mucosa and remained intact. The material demonstrated good compatibility with surrounding tissues over a period of 18 months. In adult patients, the reconstructed ear canal showed no signs of deterioration. The technique of using micro-implants to reduce radical mastoid cavities was effective. The diamond drill was used to prepare the implant site before insertion. The results suggest that the material supports tissue integration without adverse effects.

The study suggests that polymaleinate ionomer implants are a viable option in reconstructive middle ear surgery. The material's biocompatibility and structural stability were confirmed through clinical and histological assessments. The absence of extrusion or tissue reaction supports its use in both adult and pediatric patients. The technique of using micro-implants to reduce radical mastoid cavities appears effective. The study supports the use of this material for long-term implantation. The results align with the experimental and clinical findings of the Würzburg group. The method of covering the implant with a flap of periosteum and connective tissue is recommended. The findings contribute to the growing evidence for ionomer-based implants in otologic surgery.