贴面,后牙,生存率,满意度," /> 贴面,后牙,生存率,满意度,"/> Four-year follow-up study of onlay and occlusal veneer restorations on posterior teeth
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Journal of Peking University (Health Sciences) ›› 2024, Vol. 56 ›› Issue (1): 88-92. doi: 10.19723/j.issn.1671-167X.2024.01.014

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Four-year follow-up study of onlay and occlusal veneer restorations on posterior teeth

Meichen WU1,Tongkai XU2,Wei AN1,3,Zhongning LIU1,Ting JIANG1,*()   

  1. 1. Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & NHC Research Center of Engineering and Technology for Computerized Dentistry & NMPA Key Laboratory for Dental Materials, Beijing 100081, China
    2. Department of second general dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, China
    3. Department of Dental Implant, Stomatology Hospital of Kunming Medical University, Kunming 650032, China
  • Received:2023-09-04 Online:2024-02-18 Published:2024-02-06
  • Contact: Ting JIANG E-mail:jt_ketizu@163.com

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Abstract:

Objective: To investigate the survival rate and clinical failure reasons of onlay and occlusal veneer restorations retrospectively, and to put forward valuable suggestions for the selection of clinical indications. Methods: A total of 102 patients and 124 teeth treated by one of the authors from 2016 to 2019 were subjected to CAD/CAM lithium silicate reinforced glass-ceramic onlay or veneer restorations of premolars and molars, including 43 teeth with pulp vitality, 81 endodontic treated teeth, and occlusal thickness of restoration was 1.5 mm. After four years of restoration, retrospective surveys were conducted to record the survival rate of restorations, the causes of restoration failure, and patient satisfaction rates, and the survival rate of restorations between vital teeth and endodontic treated teeth and among restored teeth was statistically analyzed by Chi-square test. Results: The survival rates of restorations on vital teeth and endodontic treated teeth were 95.5% and 90.0%, respectively, the average survival rate was 90.2%. The survival rates of vital teeth were higher than those of endodontic treated teeth without statistical difference. There was also no statistically significant difference among the tooth locations. The causes of failure included the cracking of the restoration, the loss of the restoration, the fracture of the abutment teeth, secondary caries below the adjacent contact point, and food impaction caused by the loosening of the adjacent contact point. The overall patient satisfaction rate was 91.5%. Conclusion: The 4-year survival rate of glass-ceramic onlays and occlusal veneers is lower than that of the full crown restoration, and there are more complications than that of the single-crown restorations. The design of the restoration should be carefully selected based on the vitality of the abutment tooth and the remaining amount of tooth tissue. When there is too little tooth structure left, a post and crown should be selected for restoration. Adequate strength and thickness of the restoration should be ensured to prevent food impaction. Due to the small amount of abutment tooth preparation, it has the advantages of less stimulation of the pulp and periodontal tissue, and can be recommended as a trial restoration.

Key words: Onlay, Occlusal veneer, Posterior teeth, Survival rate, Satisfaction rate

CLC Number: 

  • R783

Table 1

Composition and percentage of restored tooth positions"

Items Maxillary premolars Mandibular premolars Maxillary molars Mandibular molars Total(tooth) Percentage
Vital teeth 10 3 15 16 44 35.5
Nonvital teeth 10 5 28 37 80 64.5
Total(tooth) 20 8 43 53 124 100
Percentage 16.1 6.5 34.7 42.7 100 -

Figure 1

Schematic diagram of onlay and veneer abutment preparation A, occlusal veneer; B, onlay with pulp cavity retention shape; C, onlay with adjacent retention shape."

Table 2

Impact of gender on the survival rate of occlusal veneers and onlays"

Gender Number of people Survival number (person) Failed number (person) Survival rate/% χ2 P
Male 45 40 5 88.9
Female 57 52 5 91.2 0.004 0.953
Total 102 92 10 90.2

Table 3

Impact of dental pulp vitality on the survival rate of occlusal veneers and onlays"

Items Number of restorations Survival restorations Failed restorations Survival rate/% χ2 P
Vital teeth 44 42 2 95.5
Nonvital teeth 80 72 8 90.0 0.522 0.470
Total 124 114 10 91.9

Table 4

Impact of tooth position on the survival rate of occlusal veneers and onlays"

Group Teeth position Number of restorations Survival restorations Failed restorations Survival rate/% χ2 P
1 Maxillary premolars 20 19 1 95.0 0.008 0.930
Maxillary molars 43 39 4 97.5
2 Mandibular premolars 8 8 0 100.0 － ＞0.999
Mandibular molars 53 48 5 90.1
3 Maxillary 63 58 5 92.0
Mandibular 61 56 5 91.8 0.003 0.958
Total 124 114 10 91.9
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