# Is Oral Microflora Related to Development of Malfunction in Patients Using Voice Prosthesis?

## TL;DR

This study explores if oral bacteria affect the performance of voice prostheses in laryngectomy patients over time.

## Contribution

The study provides new insights into the relationship between oral microflora and voice prosthesis malfunction.

## Key findings

- A strong correlation was found between oral and prosthesis microflora in patients with malfunctioning prostheses.
- No significant linear correlation was found between the type of microorganism and the lifespan of voice prostheses.
- Microbiological analysis showed that microflora presence is linked to reduced prosthetic efficiency.

## Abstract

Background: this prospective study investigated the correlation between the oral bacterial microflora and the microflora found in voice prostheses (VPs) among 20 patients who had undergone laryngectomy. The aim was to explore the associations between the microflora’s presence and the malfunction of VPs, along with the association between the predominant microorganism and the longevity of VPs. Methods: the research process included gathering medical histories, conducting ENT examinations, replacing VPs, and performing check-ups every four months for a period of 15.5 months. Additionally, microbiological examinations, blood tests, and voice change surveys were conducted. Results: a correlation between the microflora isolated from VPs and that from oral rinses was demonstrated in a large percentage of patients who experienced a loss of prosthetic functional efficiency. The correlation analysis between the type of microorganism and the lifespan of VPs showed a non-significant Pearson correlation coefficient (r = 0.043, p = 0.678). Conclusions: there is no significant linear correlation between the predominant microorganism and the average lifespan of VPs.