title: Clinical features and treatment outcomes of dental implant-related paranasal sinusitis: A 2-year prospective observational study.
abstract: OBJECTIVE
  As dental implant-related paranasal sinusitis has different pathophysiology and clinical features from primarily rhinogenic paranasal sinusitis, the standard treatment protocol for dental implant-related paranasal sinusitis has not yet been established. The aim of this study was to analyze the clinical characteristics and treatment results of dental implant-related paranasal sinusitis.
  
  
  METHODS
  We conducted a prospective single-center study of 19 patients who were treated for odontogenic sinusitis developing in relation to dental implant from September 2008 through May 2012. The age of the patients ranged from 33 to 78 years, with the mean age of 54.5 years. Foul odor and postnasal dripping were the two most common complaints. All patients underwent nasal endoscopic examination and paranasal sinus CT before treatment, and initial conservative treatment for 1 week. Patients unresponsive to medical treatment underwent endoscopic sinus surgery (ESS). All patients were classified into the conservative and surgical groups for analysis and followed up for 2 years after initial diagnosis.
  
  
  RESULTS
  Four patients (21%) were successfully treated conservatively, while 15 patients (79%) underwent surgical treatment. One of these 15 patients required revision surgery. After 2 years, all patients were successfully treated, so there were no more clinical signs of recurrent sinusitis in any patients. The survival rate of implants was 100%. Compared to those of the conservative group, symptom duration, the Lund-MacKay CT score, status of the ostiomeatal unit (OMU), and the condition of the maxillary sinus floor were significantly more severe in the surgical group.
  
  
  CONCLUSIONS
  In our study, the majority of patients who once developed paranasal sinusitis associated with dental implants required surgical treatment. Findings of paranasal sinus CT may be important in determining treatment option.
authors: Department of Otorhinolaryngology-Head and Neck Surgery, Ewha Womans University, School of Medicine, Seoul, Korea.
authors: So Jeong
authors: SJ
authors: Kim
authors: Department of Otorhinolaryngology-Head and Neck Surgery, Ewha Womans University, School of Medicine, Seoul, Korea.
authors: Jee Soo
authors: JS
authors: Park
authors: Department of Otorhinolaryngology-Head and Neck Surgery, Ewha Womans University, School of Medicine, Seoul, Korea.
authors: Hee Tae
authors: HT
authors: Kim
authors: Department of Otorhinolaryngology-Head and Neck Surgery, Ewha Womans University, School of Medicine, Seoul, Korea.
authors: Cha Hee
authors: CH
authors: Lee
authors: Department of Otorhinolaryngology-Head and Neck Surgery, Ewha Womans University, School of Medicine, Seoul, Korea.
authors: Yun Hwi
authors: YH
authors: Park
authors: Department of Otorhinolaryngology-Head and Neck Surgery, Ewha Womans University, School of Medicine, Seoul, Korea. jhent@ewha.ac.kr.
authors: Jung Ho
authors: JH
authors: Bae
mesh_terms: D000328:Adult; D000368:Aged; D015921:Dental Implants / Q000009:adverse effects*; D004724:Endoscopy; D005260:Female; D006801:Humans; D008297:Male; D015523:Maxillary Sinusitis / Q000188:drug therapy / Q000209:etiology* / Q000601:surgery*; D008875:Middle Aged; D011446:Prospective Studies; D012086:Reoperation; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome
chemical_list: D015921:Dental Implants
keywords: dental implant; endoscopic sinus surgery; odontogenic sinusitis; ostiomeatal unit