Mandibular Implant‐Retained Overdentures: Potential Accelerator of Bone Loss in the Anterior Maxilla?

Alsrouji, Mohamed Samih; Ahmad, Rohaya; Rajali, Aiemeeza; Mustafa, Nor Wati Nur Atikah; Ibrahim, Norliza; Baba, Nadim Z.

doi:10.1111/jopr.12999

Cited by 9 publications

(7 citation statements)

References 25 publications

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“…RRR in the anterior maxilla was quantified using a superimposition method based on CBCT and stereolithography (STL) . CBCT scans were taken before and 1 year post‐treatment, and 3D models of the maxilla of the 2 time points were generated using Mimics software (Materialise, Leuven, Belgium).…”

Section: Methodsmentioning

confidence: 99%

“…The region of interest for measurement of RRR of the anterior maxilla was from the inferior border of the nasal spine to the posterior border of the incisive foramen. RRR was quantified as the percentage change in volume …”

Section: Methodsmentioning

confidence: 99%

“…Hypothetically, this higher bite force could exert more pressure on the supporting mucosa of the opposing maxillary denture and may cause larger blood flow disturbance and greater RRR. Therefore, it is a cause for concern that despite the numerous benefits an implant‐retained overdenture (IRO) offers to edentulous subjects, it may cause more resorption to the opposing maxilla than conventional complete dentures . Anterior implants have been equated to those of mandibular natural teeth and have been suggested to cause resorption of the opposing maxilla and contribute to Combination Syndrome .…”

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confidence: 99%

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Blood Flow Alterations in the Anterior Maxillary Mucosa as Induced by Implant‐Retained Overdenture

Alsrouji

Ahmad

Ibrahim

et al. 2019

Journal of Prosthodontics

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Purpose Blood flow disturbance from functional pressure may lead to ischemia and accumulation of metabolites leading to residual ridge resorption (RRR) underneath complete dentures. The purposes of this study were to determine the effect of mandibular complete denture (CD) and implant‐retained overdenture (IRO) on blood flow disturbance in the opposing denture bearing‐mucosa of maxillary CD and to compare the blood flow disturbance to RRR of the anterior maxilla. Materials and Methods The test group included 9 participants rehabilitated by maxillary CD opposing mandibular IRO, while the control group consisted of 4 participants with CDs. Blood flow was measured by laser Doppler flowmetry (LDF) after denture removal for 0, 30, 60, and 90 minutes. RRR was quantified as reduction in bone volume a year post‐treatment. The measurement of blood flow was then compared to the quantification of RRR. Results The mean blood flow measure for the IRO group was significantly lower than CD after immediate denture removal and 30 minutes later. After 60 minutes, the mean difference was not significant between groups, and at 90 minutes, the mean blood flow of both groups equalized to reach a steady state of 377 BPU. The mandibular IRO had reduced the initial blood flow measure in the opposing anterior maxilla mucosa to almost a quarter (103 BPU) of the steady state value (377 BPU) compared to the CD, which reduced it to only about one half (183 BPU), suggesting greater blood flow disturbance in the IRO group. This result is in tandem with the greater reduction of bone volume observed in the IRO group, which was 7.3 ± 1.3% after a year, almost three times higher than CD group at 2.6 ± 1.7%. Conclusion IRO may cause significantly higher blood flow disturbance than CD and may have contributed to greater RRR in the anterior maxilla.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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Blood Flow Alterations in the Anterior Maxillary Mucosa as Induced by Implant‐Retained Overdenture

Alsrouji

Ahmad

Ibrahim

et al. 2019

Journal of Prosthodontics

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“…In addition, maxillary implantported prostheses opposed by the remaining mandibular anterior teeth reduce maxi anterior and posterior alveolar bone loss compared with conventional dentures [37] have also experienced cases where implant-supported prostheses for patients with a rior hyperfunction contributed to the recovery of damaged maxillary anterior teeth ure 7). However, there have been multiple reports that have presented mandibular imp supported overdenture-induced anterior hyperfunction, subsequent bone resorption, the formation of flabby hyperplastic tissues at the anterior site beneath maxillary comp denture base-opposing implants [38][39][40][41][42][43]. These reports suggested the risk of mandib implant-supported overdentures for destructive changes on the maxillary anterior sit fact, we experienced the negative effects of mandibular implant-supported overdent on maxillary anterior sites and mandibular posterior sites (Figure 8).…”

Section: Implant Treatments For Anterior Hyperfunction and Combinatio...mentioning

confidence: 99%

Anterior Hyperfunction by Mandibular Anterior Teeth: A Narrative Review

Ogino,

Ayukawa

2023

Healthcare

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“Combination syndrome”, defined by Kelly in 1972, is a challenging condition observed in a patient with an edentulous maxilla and a partially edentulous mandible with only mandibular anterior teeth. “Anterior hyperfunction syndrome” is regarded as a synonym of combination syndrome and was first described in 1994. Although these terms have been well known, the definition of “anterior hyperfunction” has not been described yet. This narrative review focused on anterior hyperfunction and discussed the etiology and the clinical managements. An electronic bibliographic search for this literature review was conducted in addition to the review of our clinical cases. The previous reports indicated that combination syndrome with all five features was rarely observed. The patients with anterior hyperfunction generally showed the loss of posterior occlusal supports and the loss of vertical dimension of occlusion. To manage anterior hyperfunction, these conditions should be improved using conventional removable prostheses and implant-supported prostheses. Anterior hyperfunction is attributed to mandibular anterior teeth and some interventions for mandibular anterior teeth are required in many cases. Additionally, it must be noted that implant-supported prostheses may lead to anterior hyperfunction. In conclusion, comprehensive approaches for the remaining teeth and the prostheses will be required to manage this complex condition.

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“…[4][5][6][7][8] The severity of findings varied from one study to another; however, the main observation was related to increased bone loss in the anterior maxilla. 6,[9][10][11][12][13] The type of implant overdenture is also to be considered. 14 It appears that using an implant bar-retained overdenture would cause more bone loss in the anterior maxilla, as compared to the case when overdenture attachments on nonsplinted implants were used.…”

mentioning

confidence: 99%

“Combination Syndrome” in an Upper/Lower Implant Overdenture Patient

Uram-Tuculescu¹

2019

Implant Dentistry

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Mandibular Implant‐Retained Overdentures: Potential Accelerator of Bone Loss in the Anterior Maxilla?

Cited by 9 publications

References 25 publications

Blood Flow Alterations in the Anterior Maxillary Mucosa as Induced by Implant‐Retained Overdenture

Blood Flow Alterations in the Anterior Maxillary Mucosa as Induced by Implant‐Retained Overdenture

Anterior Hyperfunction by Mandibular Anterior Teeth: A Narrative Review

“Combination Syndrome” in an Upper/Lower Implant Overdenture Patient

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