Kai Zhao1, Meifei Lian2, Shengchi Fan1, Wei Huang3, Feng Wang3, Yiqun Wu1. 1. Second Dental Clinic, Department of Oral Implantology, Shanghai Key Laboratory of Stomatology, Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, National Clinical Research Center of Stomatology, Shanghai, China. 2. Department of Prosthodontics, Shanghai Ninth People's Hospital Affiliated with Shanghai Jiao Tong University School of Medicine, Shanghai, China. 3. Department of Oral Implantology, Shanghai Key Laboratory of Stomatology, Shanghai Ninth People's Hospital Affiliated with Shanghai Jiao Tong University School of Medicine, Shanghai, China.
Abstract
OBJECTIVES: The purpose of this retrospective study was to evaluate the long-term changes in the thickness of Schneiderian membranes after zygomatic implant placement using cone beam computed tomography (CBCT). MATERIAL AND METHODS: Twenty-five consecutive patients were included in this study. All the patients underwent bilateral zygomatic implant placement. Schneiderian membrane thickness (SMT) in 49 maxillary sinuses (one sinus was not included because of early loss of the zygomatic implants) was measured using CBCT before and at least 1 year after zygomatic implant placement. Ostium patency of each sinus was also evaluated and recorded. RESULTS: In total, 84 zygomatic implants and 30 regular implants were placed in included patients. Two unilateral maxillary zygomatic implants in one patient were removed 2 months after implant placement. The SMT increased from 1.03 mm (inter-quartile range: 1.57 mm) to 1.33 mm (inter-quartile range: 1.98 mm) after a median follow-up time of 23.00 months (inter-quartile range: 14 months), and the difference was statistically significant. Before zygomatic implant insertion, 24.5% (12/49) of sinuses had SMT greater than 2 mm, whereas this value was 28.6% (14/49) after zygomatic implant placement. The percentage of sinuses observed with ostium patency also increased from 2.0% (1/49) to 12.2% (6/49). CONCLUSIONS: Chronic Schneiderian membrane thickening could result from zygomatic implant insertion. Intensive postoperative care and clinical and radiographic monitoring are recommended after zygomatic implant placement.
OBJECTIVES: The purpose of this retrospective study was to evaluate the long-term changes in the thickness of Schneiderian membranes after zygomatic implant placement using cone beam computed tomography (CBCT). MATERIAL AND METHODS: Twenty-five consecutive patients were included in this study. All the patients underwent bilateral zygomatic implant placement. Schneiderian membrane thickness (SMT) in 49 maxillary sinuses (one sinus was not included because of early loss of the zygomatic implants) was measured using CBCT before and at least 1 year after zygomatic implant placement. Ostium patency of each sinus was also evaluated and recorded. RESULTS: In total, 84 zygomatic implants and 30 regular implants were placed in included patients. Two unilateral maxillary zygomatic implants in one patient were removed 2 months after implant placement. The SMT increased from 1.03 mm (inter-quartile range: 1.57 mm) to 1.33 mm (inter-quartile range: 1.98 mm) after a median follow-up time of 23.00 months (inter-quartile range: 14 months), and the difference was statistically significant. Before zygomatic implant insertion, 24.5% (12/49) of sinuses had SMT greater than 2 mm, whereas this value was 28.6% (14/49) after zygomatic implant placement. The percentage of sinuses observed with ostium patency also increased from 2.0% (1/49) to 12.2% (6/49). CONCLUSIONS: Chronic Schneiderian membrane thickening could result from zygomatic implant insertion. Intensive postoperative care and clinical and radiographic monitoring are recommended after zygomatic implant placement.
Authors: Michele Di Cosola; Andrea Ballini; Khrystyna Zhurakivska; Alberto Ceccarello; Riccardo Nocini; Annarita Malcangi; Giorgio Mori; Lorenzo Lo Muzio; Stefania Cantore; Antonio Olivo Journal: Int J Environ Res Public Health Date: 2021-12-08 Impact factor: 3.390