Abstract

Introduction: In the field of prosthodontics, dental implants have been improved to be the most optimal
method in replacing the missing teeth in terms of aesthetic and funtional restoration. Nowadays, there have
been many domestic and international reports about the pros and cons of implants placement. One of the
major demerits of implants is the requirement of quality and quantity of the available bone in the recipient
site. Therefore, bone grafting has become an appealing method for clinicians when it comes to inserting a
dental implant in an excessive bone loss region, especially in the posterior maxillary with the high risk of
implants displacement into the maxillary sinus.
Objectives: The aim of this study was to analyze clinical characteristics, cone beam computed
tomography and treatment outcomes of dental implants with closed sinus floor elevation procedure.
Materials and Methods: Twenty-two patients, who needed one dental implant in posterior maxillary
region to support prosthesis, were selected to be treated with closed sinus floor elevation method with
the use of bone graft in the Odonto-Stomatology Center – Hue Central Hospital from November 2018 to
October 2019.
Results: The age of the patients ranged from 45 to 60 years, with the mean age of 49.7 years. The
gender rates were 54.6% for men and 45.4% for women. The most common reasons of missing teeth were
tooth caries, accounting for 59.1%, followed by periodontal diseases with 36.3% and trauma with 4.6%.
The missing teeth generally had not been replaced for over two years and most commonly in the posterior
maxillary region (72.3%). The mean of bone height before sinus lift was 4 ± 1,86 mm (minium 1.7 mm and
maximum 8 mm). The mean of bone width was 6,6 ± 0,86 mm (minumum 4.7 mm and maximum 8.6 mm).
The results after one week recall were 81.8% good and 18.2% fair. After one month, the healing rate of
soft tissue was 100% successful. After six months, the results had shown new bone formation, sustainable
osseous-integrated implants in all patients, which were ready for prostheses.
Conclusion: This bone grafting is considered to be a suitable method to achieve a predictable long term
success of dental implants in the excessive bone loss region for the rehabilitaion of missing teeth.