الفهرس 
Evaluation of bone height gain following transcrestal sinus floor elevation using piezoelectric surgery versus the conventional osteotome technique in patients with atrophic posterior maxillae
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Abstract
Aim: The aim of the present study is to evaluate bone height gain following transcrestal sinus floor elevation using piezoelectric surgery versus the conventional osteotome technique. Subjects and methods: Twenty-four patients with one missing upper posterior tooth with 5-8 mm residual bone height beneath the maxillary sinus were randomly allocated into two groups; transcrestal sinus floor elevation using piezoelectric surgery (test group) and transcrestal sinus floor elevation using osteotome (control group). CBCT was used to measure bone height gain after 6 months. Implant stability, sinus membrane perforation and oral health related quality of life were evaluated using appropriate statistical tests. Results: No statistically significant difference regarding the bone height gain after 6 months between the test (2.22 mm) and control (1.94 mm) groups was found. Only one case of membrane perforation occurred in each group representing a percentage of 8 %. Likewise, no statistically significant difference between the test and the control groups regarding oral health related quality of life one week and two weeks after the surgery was found. Conclusion: Transcrestal sinus floor elevation is a successful technique regardless of the tools used with statistically significant difference between the initial bone height and bone height after 6 months. In addition, there is no statistically significant difference between transcrestal sinus floor elevation using piezoelectric surgery and osteotomes regarding bone height gain after 6 months, implant stability, membrane perforation and oral health related quality of life