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In this study, we collected and analysed the review results of 100 patients over 18 years of age who received implant fixed restorations in the Department of Stomatology of the First Hospital of Nanjing, China. The aim was to investigate the incidence of loss of contact between implant restorations and adjacent teeth and its influencing factors. Our findings may provide better insights for treatment planning and prevention of PCL.
Food impaction is a common complication after implant-supported restorations. Several studies have reported that more than 40%-66.9% of patients feel food impaction between the implant restoration and adjacent natural teeth. The most common cause of food impaction after implant restoration is the proximal contact loss(PCL), which has been reported to occur in 34% to 65% of cases. The location of PCL creates discomfort and leads to gingival inflammation and even peri-implant bone resorption, which ultimately leads to loosening of the implant. In our long-term clinical observation, not all final restorations suffer from PCL. The occurrence of PCL may be related to a number of factors such as age, gender, functional time, and so on. However, the literature addressing this issue is still limited. In this study, we collected and analysed the review results of selected patients who underwent implant-supported restorations in the First Hospital of Nanjing, China, to investigate the incidence of PCL between the implant restorations and the adjacent teeth adjacent , and the factors influencing it. Our findings may provide better insights for treatment planning and prevention of PCL.
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| plaque index assessment, periodontal probing, Bleeding on probing (BOP), Prosthetic adjacency check, initial occlusal contact, maximum occlusal contact, and filling of the cusps. | Behavioral | oral panoramic radiograph |
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| Measure | Description | Time Frame |
|---|---|---|
| the proximal contact surface was adjusted by a dental floss (Reach waxed dental floss from Johnson & Johnson, standard thickness) | The degree of proximal contact loss(PCL) was evaluated with a dental floss passing through the contact areas and classified as: (a) tight: sufficient resistance to the passage of the floss; (b) loose: insufficient resistance to the passage of the floss; and (c) open: contact: no resistance to the passage of the floss. The presence of an open or loose contact was classified as PCL. | Patients with implant-supported prostheses reviewed 3 months after delivery were eligible for inclusion in this study. |
| Measure | Description | Time Frame |
|---|---|---|
| oral panoramic radiograph | Using the radiograph analysis software's measuring function, the amount of alveolar bone resorption of the implant as well as adjacent teeth was evaluated. (a)The original bone height was measured as the distance between the enamel-cemental junction and the root apex (or the implant neck edge and the implant base). (b)The existing bone height was measured as the distance between the top of the alveolar ridge to the root apex. (c) The height of alveolar bone resorption was calculated by subtracting the original bone height from the existing bone height. |
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Inclusion Criteria:
Exclusion Criteria:
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One hundred consecutive patients, who had received either implant-supported fixed partial denture (FPD) or implant-supported single crown (SC) in the posterior region and were under regular review, were recruited.
| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Xin Wu, Master | Contact | 13770326060 | darkie777@163.com | |
| Jiaping Wang | Contact | 15563518685 | wjpsally@stu.njmu.edu.cn |
| Name | Affiliation | Role |
|---|---|---|
| Changao Xue, Master | The First Affiliated Hospital with Nanjing Medical University | Principal Investigator |
| Ning Luo, Master | The First Affiliated Hospital with Nanjing Medical University | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Nanjing First Hospital | Nanjing | Jiangsu | 210000 | China |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 33172648 | Background | Yen JY, Kang L, Chou IC, Lai YL, Lee SY. Risk assessment of interproximal contact loss between implant-supported fixed prostheses and adjacent teeth: A retrospective radiographic study. J Prosthet Dent. 2022 Jan;127(1):86-92. doi: 10.1016/j.prosdent.2020.06.023. Epub 2020 Nov 7. | |
| 33342612 | Background | Bompolaki D, Edmondson SA, Katancik JA. Interproximal contact loss between implant-supported restorations and adjacent natural teeth: A retrospective cross-sectional study of 83 restorations with an up to 10-year follow-up. J Prosthet Dent. 2022 Mar;127(3):418-424. doi: 10.1016/j.prosdent.2020.09.034. Epub 2020 Dec 17. |
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Information about participants in this study will not be shared with investigators outside the study, and all study participants are identified by initials.
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| Patients with implant-supported prostheses reviewed 3 months after delivery were eligible for inclusion in this study. |
| Bausch Arti-Fol R metallic Shimstock-Film | (a) Initial occlusal contact: Bausch articulating paper was applied to the restoration's occlusal surface, the patient was told to close their mouth slowly, the teeth just gently touched, and they opened their mouth right away. The paper was then removed, and the restoration's occlusal surface was examined to see if it had left a red mark. (b) Final occlusal contact: If the patient's restoration and opposing jaw teeth do not make contact during the initial occlusion, place the Bausch articulating paper on the restoration's occlusal surface, ask them to clench their teeth, and then have them open their mouth, take the paper out, and check to see if the implant's occlusal surface has any marks on it. | Patients with implant-supported prostheses reviewed 3 months after delivery were eligible for inclusion in this study. |
| Juan Lin, Master | The First Affiliated Hospital with Nanjing Medical University | Principal Investigator |
| 32419242 | Background | Liang CH, Nien CY, Chen YL, Hsu KW. The prevalence and associated factors of proximal contact loss between implant restoration and adjacent tooth after function: A retrospective study. Clin Implant Dent Relat Res. 2020 Jun;22(3):351-358. doi: 10.1111/cid.12918. Epub 2020 May 17. |
| 35194854 | Background | Gasser TJW, Papageorgiou SN, Eliades T, Hammerle CHF, Thoma DS. Interproximal contact loss at implant sites: a retrospective clinical study with a 10-year follow-up. Clin Oral Implants Res. 2022 May;33(5):482-491. doi: 10.1111/clr.13908. Epub 2022 Mar 1. |
| ID | Term |
|---|---|
| D057873 | Peri-Implantitis |
| ID | Term |
|---|---|
| D010510 | Periodontal Diseases |
| D009059 | Mouth Diseases |
| D009057 | Stomatognathic Diseases |
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| ID | Term |
|---|---|
| C095853 | short-wavelength opsin |
| D011827 | Radiation |
| ID | Term |
|---|---|
| D055585 | Physical Phenomena |
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