Journal of Peking University(Health Sciences) ›› 2019, Vol. 51 ›› Issue (1): 136-144. doi: 10.19723/j.issn.1671-167X.2019.01.024

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Oral hygiene maintenance of locator attachments implant overdentures in edentulous population: A longitudinal study

Xiao-qian LIU1,Qiu-wen CHEN1,Hai-lan FENG1,Bing WANG2,Jian QU2,Zhen SUN2,Mo-di HENG2,Shao-xia PAN1,()   

  1. 1. Department of Prosthodontics, Beijing 100081, China
    2. Department Laboratory, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
  • Received:2018-10-08 Online:2019-02-18 Published:2019-02-26
  • Contact: Shao-xia PAN E-mail:panshaoxia@vip.163.com
  • Supported by:
    Supported by the Program for New Clinical Techniques Therapies of Peking University and School and Hospital of Stomatology(PKUSSNCT-09B20);and the Scientific Research Foundation for Returned Overseas Chie Scholars, States Education Ministry(2012-940)

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Abstract:

Objective: To investigate the oral hygiene status of edentulous patients with locator attachments implant overdentures (IOD) and to analyze the relationship among daily hygiene behavior, oral hygiene status and peri-implant diseases. Methods: Edentulous patients who received IOD treatment with locator attachments from January 2012 to May 2016 were recruited. Clinical and radiographic examinations were conducted to assess the peri-implant tissue status. Modified plaque index (mPLI), sulcus bleeding index (SBI), gingival index (GI), and probing depth (PD) were recorded and peri-implant marginal bone loss (MBL) was measured using paralleling projection technique. Patients’ peri-implant oral hygiene maintainence habits were investigated. The correlation between peri-implant diseases and oral hygiene status and behaviors was analyzed. Results: Fifty patients (125 implants) with an average follow-up time of 22 months (6-54 months) were enrolled. The mean values of mPLI, SBI, and GI were 1.4±1.2, 0.8±0.7, and 0.7±0.6, respectively. Average PD was (2.2±0.7) mm. Mesial and distal maginal bone resorptions were (1.1±1.1) mm and (0.9±0.9) mm, respectively. The prevalance of mucositis and peri-implantitis of the implants were 49.6% and 0. The prevelance of mucositis in the patients with poor oral hygiene (mPLI≥2) was 11.9 times as much as that of those with adequate oral hygiene (mPLI<1). The patients who performed oral hygiene procedure on attachments at least twice a day achieved much lower mPLI scores than those who cleaned less than twice a day. Conclusion: Oral hygiene condition in the group of patients with implant overdentures was poor, and it contributed to increased risk of peri-implant mucositis. The prevelance of musositis of the paitients with poor oral hygiene was 11.9 times as much as that of those with proper oral hygiene. Patients wearing IOD should pay more attention to the hygiene of the attachments.

Key words: Edentulous jaw, Dental implants, Locator attachments, Oral hygiene

CLC Number: 

  • R783.4

Table 1

Fully and partially edentulous in 50 paitients"

Diagnosis n (%)
Edentulous mandible and maxila 24 (48)
Partially edentulous maxilla and edentulous mandible 17 (34)
Partially edentulous maxilla and mandible 1 (2)
Complete dentition of maxilla and edentulous mandible 8 (16)
Total 50 (100)

Table 2

Scores of cinical indicators for 125 implants"

Clinical indicators Mean±standard deviation
Modified plaque index 1.4±1.2
Sulcus bleeding index 0.8±0.7
Gingival index 0.7±0.6
Probing depth/mm 2.2±0.7
Buccal keratinized mucosa index/mm 3.2±1.4
Lingual keratinized mucosa index/mm 2.1±1.2

Figure 1

Plaque accumulation on the attachments"

Table 3

Modified plaque index for different age groups"

Age group Modified plaque index (x?±s)
<60 years old (n=11) 1.2±1.2
60-70 years old (n=22) 1.4±1.1
70-80 years old (n=13) 1.4±1.0
≥ 80 years old (n=4) 2.3±0.5

Figure 2

The per-implant mucositis"

Table 4

Classification of the independent variables and the occurrence of per-implant mucositis and peri-implantitis around the corresponding implants"

Factors Number of implants Healthy mucosa Per-implant mucositis Peri-implantitis
Main cause of tooth loss
Periodontitis
Non-periodontitis

86
39

39 (45.3%)
24 (61.5%)

47 (54.7%)
15 (38.5%)

0
0
Jaw grouping
Full edentulous jaw
Non-full edentulous jaw

70
55

40 (57.1%)
23 (41.8%)

30 (42.9%)
32 (58.2%)

0
0
mPLI grouping
Bad
General
Good

37
32
56

3 (8.1%)*
8 (25.0%)
52 (92.9%)

34 (81.9%)*
24 (75.0%)
4 (7.1%)

0
0
0
Follow-up time after restoring
Above 48 months
36-48 months
24-36 months
12-24 months
6-12 months

4
4
23
55
39

0 (0)
2 (50.0%)
17 (73.9%)
19 (34.5%)#
25 (56.8%)

4 (100.0%)
2 (50.0%)
6 (26.1%)
36 (65.4%)
14 (43.2%)

0
0
0
0
0
Brand of the implant
Straumann
Bego

65
60

25 (38.5%)
38 (63.3%)

40 (61.5%)
22 (36.7%)

0
0
Implant level
Bone level
Soft tissue level

82
43

46 (56.1%)
17 (39.5%)

36 (43.9%)
26 (60.5%)

0
0
Smoking
Yes
No

12
113

1 (8.3%)
62 (54.9%)

11 (91.7%)
51 (45.1%)

0
0
Diabetes
Yes
No

12
113

5 (41.7%)
58 (51.3%)

7 (58.3%)
55 (48.7%)

0
0

Figure 3

Comparison of mPLI, SBI, and GI scores of patients with different cleaning behaviors of attachments * P<0.05."

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