Cone-Beam Computed Tomography, Dental Implantation, Maxillary Sinus Floor Augmentation, Surgical Procedure, Unspecified
Conditions
Brief summary
This study retrospectively evaluated the effect of two different lateral window preparation techniques on peri-implant bone augmentation for patients who underwent lateral sinus floor elevation with simultaneous implant placement using two-dimensional and three-dimensional radiographic results, with special emphasis placed on the stability of the graft material after surgery.
Interventions
PROCEDUREPiezoelectric osteotomy
The piezoelectric technique, another window preparation procedure that does not use a round bur, was first introduced to LSFE in 2001 for its high accuracy of osteotomy and low rate of membrane perforation. Later studies demonstrated that the operation time, postoperative reactions, and perforation rate of this procedure are considered to be acceptable compared with rotary bur. Moreover, the piezoelectric technique allows for the lateral bone window to be cut and preserved relatively completely.
Sponsors
The Dental Hospital of Zhejiang University School of Medicine
Study design
Observational model
COHORT
Time perspective
RETROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
* age ≥18 years; * one or more maxillary posterior teeth were missing, and the healing time was more than 3 months; * complete basic information and detailed operation records; * available CBCT images before surgery, immediately after surgery, and 6 months after surgery; * RBH ≤6 mm shown by CBCT at T0 at the site of the missing tooth； * no systematic diseases and no untreated periapical disease or periodontal disease before surgery.
Exclusion criteria
* (1) maxillary lesions have not been properly treated； * present or past medication of bisphosphonates; * pregnancy or lactation; * present or past radiotherapy of head and neck cancer within 5 years; * acute and chronic inflammation in the maxillary sinus; * in need of additional vertical or horizontal bone augmentation besides LSFE with endo-sinus graft materials; * heavy smoker (\>20 cigarettes/day at the time of surgery).
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Augmentation volume | Immediately after surgery, and 6 months after surgery | The volume of the endo-sinus reconstructed graft materials |
| Apical bone height | Immediately after surgery, and 6 months after surgery | The distance (mm) from the implant apex to the most apical position of the graft material along the longitudinal axis of the implant |
| Endo-sinus bone gain | Immediately after surgery, and 6 months after surgery | The distance (mm) from the level of the sinus floor (middle of the buccal level and palatal level) to the level of the most apical position of the graft material along the longitudinal axis of the implant |
| Palatal bone height | Immediately after surgery, and 6 months after surgery | The vertical distance (mm) from the api- cal margin of the implant shoulder on the palatal side straight up to the position of the most apical position of the graft material |
| Buccal bone height | Immediately after surgery, and 6 months after surgery | The vertical distance (mm) from the api- cal margin of the implant shoulder on the buccal side straight up to the position of the most apical position of the graft material |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Early implant loss | 6 months after surgery | Early implant loss was defined as an implant show- ing clinical mobility prior to the placement of the abutment |
| Lateral window length | Immediately after surgery, and 6 months after surgery | the distance between the edges of lateral window caused by the lateral antrostomy |
| Lateral bone length | Immediately after surgery, and 6 months after surgery | the length of the bone window ob- tained by piezoelectric osteotomy |
| Perforation incidence | During the surgery | Sinus perforation was determined by direct visualization and the Valsalva maneuver during the surgery process. |
Countries
China
Outcome results
None listed