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Therapeutic Area: Extraction Socket Management
BIOBRIEF
Alveolar Ridge Preservation with vallos® Mineralized Cortico-Cancellous Allograft
THE SITUATION
A 68 year old female patient was referred from her general dentist for persistent minor discomfort on #31, suspected endo-perio lesion. Upon the examination, deep probing depth and grade 1 mobility were noted. Radiographic interpretation indicating a large J shaped lesion and possible root fracture. Patient had missing #30 and #32 has been mesially drifted and left a restorative space more than > 13 mm mesio-distally.
THE RISK PROFILE
Low Risk | Medium Risk | High Risk | |
---|---|---|---|
Patient’s health | Intact immune system/Non-smoker | Light smoker | Impaired immune system |
Patient’s esthetic requirements | Low | Medium | High |
Height of smile line | Low | Medium | High |
Gingival biotype | Thick – “low scalloped” | Medium – “medium scalloped” | Thin – “high scalloped” |
Shape of dental crowns | Rectangular | Triangular | |
Infection at implant sight | None | Chronic | Acute |
Bone height at adjacent tooth site | ≤ 5 mm from contact point | 5.5 – 6.5 mm from contact point | ≥ 7 mm from contact point |
Restorative status of adjacent tooth | Intact | Restored | |
Width of tooth gap | 1 tooth (≥ 7 mm) | 1 tooth (≤ 7 mm) | 2 teeth or more |
Soft-tissue anatomy | Intact | Compromised | |
Bone anatomy of the alveolar ridge | No defect | Horizontal defect | Vertical defect |
THE APPROACH
A successful treatment outcome comes with proper selection of the technique and materials. In order to facilitate an implant supported restoration in the site with > 13mm mesio-distal space, a staged approach was selected, with alveolar ridge preservation (ARP) performed using an atraumatic extraction technique and vallos® mineralized cortico-cancellous bone allograft chosen as the material.
THE OUTCOME
The planned treatment of replacing a tooth with a dental implant in the regenerated alveolar ridge was achieved. By employing secondary intention healing following ARP and utilizing a lingual paracrestal incision, adequate keratinized tissue was preserved on the buccal side of the implant-supported restoration.
Hanae Saito, DDS, MS, CCRC
Hanae Saito, DDS, MS, CCRC serves as a clinical associate professor and oversees the Dual Perio-Pros program and predoctoral periodontal education within the Division of Periodontics, at the University of Maryland School of Dentistry. She is a Diplomate of the American Board of Periodontology. Dr. Saito obtained a Master of Science in Clinical Research and a certificate in Periodontics from New York University College of Dentistry. Additionally, she operates a faculty practice focused on periodontology and implant dentistry.
Andrew Tong, DDS
Andrew Tong, DDS earned his Bachelor of Science degree from the University of Maryland at College Park in 2015 before completing his Doctor of Dental Surgery (D.D.S) degree at the University of Maryland School of Dentistry in 2019. Following this, he undertook a General Practice Residency at the Newark Beth Israel Medical Center in New Jersey from 2019 to 2020. Dr Tong now practices general dentistry at Tong Dental Care in Gaithersburg, MD. Concurrently, he is pursuing a Master’s degree in Periodontics at the University of Maryland School of Dentistry.
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BIOBRIEF
Immediate Mandibular Molar Transition
THE SITUATION
The case here is typical enough, a failing mandibular molar with a vertical sub-osseous fracture. Traditionally, the replacement process can take three or more surgical exposures (extraction and regeneration), (implant placement), (second stage exposure) and more than a year of therapy.
THE RISK PROFILE
Low Risk | Medium Risk | High Risk | |
---|---|---|---|
Patient’s health | Intact immune system Non-smoker | Light smoker | Impaired immune system |
Patient’s esthetic requirements | Low | Medium | High |
Height of smile line | Low | Medium | High |
Gingival biotype | Thick – “low scalloped” | Medium – “medium scalloped” | Thin – “high scalloped” |
Shape of dental crowns | Rectangular | Triangular | |
Infection at implant sight | None | Chronic | Acute |
Bone height at adjacent tooth site | ≤ 5 mm from contact point | 5.5 – 6.5 mm from contact point | ≥ 7 mm from contact point |
Restorative status of adjacent tooth | Intact | Restored | |
Width of tooth gap | 1 tooth (≥ 7 mm) | 1 tooth (≤ 7 mm) | 2 teeth or more |
Soft-tissue anatomy | Intact | Compromised | |
Bone anatomy of the alveolar ridge | No defect | Horizontal defect | Vertical defect |
THE APPROACH
Immediate molar replacement requires atraumatic removal of the fractured tooth, careful socket debridement and development of a channel for an ideally positioned implant. The implant then needs to be placed down in the bone channel with the implant platform positioned just below the socket walls. It needs to be stable. Channel deficiency augmentation is achieved with Geistlich Bio-Oss Collagen® which is covered with a collagen matrix, Geistlich Mucograft® with the edges tucked under the gingival margins and sealed over with tissue glue.
THE OUTCOME
This single stage replacement protocol has proven to be simple, safe and highly effective providing the socket is fully degranulated and the implant is stable and not loaded in the early healing stages. It works well when a gingiva former is immediately placed into the implant instead of a cover screw, Geistlich Bio-Oss Collagen® is packed around the implant to fill the residual socket, then covered with a Geistlich Mucograft® and sutured. There is no need for flap advancement to cover over the socket.
Dr. Peter Hunt
After graduate training on an Annenberg Fellowship at the University of Pennsylvania, dr. hunt helped start up the University of the Western Cape dental School in Cape Town, South Africa. he returned to the University of Pennsylvania where in time he became Clinical Professor of Periodontics. later he helped start up Nova Southeastern‘s dental School where he was Professor of Restorative dentistry, Post Graduate director and director of Implantology. he has had a private practice in Philadelphia focusing on implant and rehabilitation dentistry since 1981.