Factors affecting maxillary sinus pneumatization following posterior maxillary tooth extraction
임현창, 김상엽, 김도협, 허익, 정종혁, 신승일,
소속 상세정보
임현창 ( Lim Hyun-Chang ) - Kyung Hee University School of Dentistry Department of Periodontology
김상엽 ( Kim Sang-Yup ) - Kyung Hee University Graduate School Department of Dentistry
김도협 ( Kim Do-Hyup ) - Kyung Hee University School of Dentistry Department of Periodontology
허익 ( Herr Yeek ) - Kyung Hee University School of Dentistry Department of Periodontology
정종혁 ( Chung Jong-Hyuk ) - Kyung Hee University School of Dentistry Department of Periodontology
신승일 ( Shin Seung-Il ) - Kyung Hee University School of Dentistry Department of Periodontology
Abstract
Purpose: The aims of the present study were 1) to quantitatively evaluate the extent of sinus pneumatization and 2) to determine the factors affecting sinus pneumatization.
Methods: Based on implant treatment records, a list of patients who underwent implant placement on the posterior maxilla was obtained. Among them, patients with pre-extraction and post-extraction (before implant placement) panoramic radiographs were selected. After excluding radiographs with low resolution and image distortion, the radiographs before and after extraction were superimposed using computer software. Subsequently, the extent of sinus pneumatization (the vertical change of the sinus floor) was measured. Simple and multiple mixed models were used to determine the factors affecting sinus pneumatization.
Results: A total of 145 patients were eligible for the present investigation. The average extent of sinus pneumatization was 1.56±3.93 mm at 176 tooth sites. Male sex, single tooth extraction, extraction of an endodontically compromised tooth, a class I root-sinus relationship, and sinus membrane thickening >10 mm favored pneumatization, but without statistical significance. The maxillary second molar presented the greatest pneumatization (2.25±4.39 mm) compared with other tooth types. This finding was confirmed in the multiple mixed model, which demonstrated a statistically significant impact of the extraction of a second molar compared with the extraction of a first premolar.
Conclusions: Maxillary sinus pneumatization was 1.56±3.93 mm on average. The extraction of a second molar led to the greatest extent of pneumatization, which should be considered in the treatment plan for this tooth site.
키워드
Bone resorption; Maxillary sinus; Radiography
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