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The contour of maxillary sinus matters in osteotome sinus elevation. So does the implant intruding angle between the axis of the implant and the tangent line of the sinus floor contour. The investigators have been engaged in studying the relationship between the outcome of bone formation and the intruding angle, which could guide our clinical decision-making.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| concave group | the group whose level of sinus floor is lower than both of the adjacent teeth | ||
| angle group | the group whose level of sinus floor is lower than one of the adjacent teeth and higher than the other one of the adjacent teeth | ||
| flat group | the group whose level of sinus floor is similar to both of the adjacent teeth |
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| Measure | Description | Time Frame |
|---|---|---|
| endosinus bone change | endosinus bone change after osteotome sinus elevation without grafting | from the time of performing the implanting surgery to the latest recalling period, accessed up to 100 months |
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Inclusion Criteria:
Exclusion Criteria:
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Patients who visited Guanghua Hospital of Stomatology, Sun Yat-Sen University from July 2006 to August 2018.
| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Feilong Deng, PhD | Contact | +8620 8386 2537 | dengfl@mail.sysu.edu.cn |
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Hospital of Stomatology, Sun Yat-sen University | Recruiting | Guangzhou | Guangdong | 510000 | China |
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