|Year : 2019 | Volume
| Issue : 1 | Page : 62-64
Putty-based surgical site protection during intraoral trimming of the hyrax distractor tooth borne appliance
Tulika Tripathi, Navneet Singh, Priyank Rai, Prateek Gupta
Department of Orthodontics and Dentofacial Orthopaedics, Maulana Azad Institute of Dental Sciences, New Delhi, India
|Date of Web Publication||4-Feb-2019|
Dr. Tulika Tripathi
Department of Orthodontics and Dentofacial Orthopaedics, Maulana Azad Institute of Dental Sciences, Bahadur Shah Zafar Marg, New Delhi - 110 002
Source of Support: None, Conflict of Interest: None
Background: HYDIS-TB is a contemporary distraction appliance used in large alveolar cleft defects. This appliance requires intraoral trimming at the docking site during approximation of the segments which cause entrapment of acrylic particles at the surgical site thereby hampering normal healing process. Solution: We employed commonly available putty material at distraction site in a cleft patient during intraoral acrylic trimming of the appliance. This shielded the surgical site from exogenous material, which facilitated proper healing.
Keywords: Alveolar cleft, alveolar distraction, distraction osteogenesis
|How to cite this article:|
Tripathi T, Singh N, Rai P, Gupta P. Putty-based surgical site protection during intraoral trimming of the hyrax distractor tooth borne appliance. J Cleft Lip Palate Craniofac Anomal 2019;6:62-4
|How to cite this URL:|
Tripathi T, Singh N, Rai P, Gupta P. Putty-based surgical site protection during intraoral trimming of the hyrax distractor tooth borne appliance. J Cleft Lip Palate Craniofac Anomal [serial online] 2019 [cited 2019 Feb 19];6:62-4. Available from: http://www.jclpca.org/text.asp?2019/6/1/62/251465
| Introduction|| |
Alveolar defect closure in cleft cases requires formidable efforts on the part of craniofacial team to restore arch continuity, stabilize the maxillary segments, establish bone support for the dentition and nasal alar cartilage, and obliterate oronasal fistulae and placement of dental implant.
Bone grafting in large alveolar defects has shortcoming of high graft failure rate. In such cases, transport distraction osteogenesis is a procedure of choice to facilitate bone and soft-tissue formation by normal healing process. Bone transport in distraction osteogenesis employs osteotomy cuts in healthy bone, followed by bone-borne or tooth-borne distractor assisted movement of bone and teeth complex to close the cleft defect. However, the bone-borne distractor is more invasive and expensive. Hence, we employed a contemporary tooth-borne distractor, hyrax distractor tooth borne (HYDIS-TB) in our patients for its less invasiveness, and satisfactory result.
This appliance is a custom-made tooth-borne distractor used for closure of large alveolar defects by transporting adjacent segments having teeth with associated bone with the help of a hyrax expansion screw. The screw is embedded in an acrylic capping over the teeth, and its activation moves the transport disc causing gradual reduction of the cleft defect. As the defect is narrowed, the intervening acrylic needs to be trimmed to allow closer approximation of docking segments [Figure 1]. During trimming, acrylic particles may be deposited at the site of distraction, thereby hampering healing process. The acrylic particles thus deposited act as foreign body and may cause inflammatory and wound infection.
|Figure 1: Intraoral photographs showing the approximated segments after appliance activation which require intraoral trimming|
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Hence, putty (Dentsply IH Ltd, Surrey, UK) was used as a blocking layer to protect these sites from trimmed acrylic dust. Putty is polyvinyl siloxane impression material commonly used for impression making in the oral cavity. It is available as separate base and catalyst which are mixed to allow addition reaction between the two, giving viscous, pliable consistency that can be molded in desired shape.
| Procedure|| |
- The distraction and the docking site were dried and isolated using suction
- The base and catalyst of soft putty material were mixed
- To prevent trimmed acrylic particles from getting deposited at the distraction site, mixed putty material was used to cover the distraction and docking sites (surgical sites) [Figure 2] and allow to set for 2 min
- After setting of putty material, the intervening acrylic was trimmed.
This prevented the embedding of acrylic dust on the distracted area [Figure 3]. After trimming, the putty material was easily removed with the aid of an explorer. Distraction and docking sites were found to be clear of any acrylic particles [Figure 4].
|Figure 3: Intraoral trimming of the appliance with a straight fissure bur|
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|Figure 4: Creation of space for further approximation by intraoral trimming|
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| Discussion|| |
The acrylic particles act as corpora aliena, which may trigger adverse foreign body responses by stimulating expression of certain proinflammatory cytokines. This initiates an immune reaction cascade involving macrophage infiltration, multinuclear giant cell formation, and fibroblasts recruitment to encapsulate the foreign bodies. However, failure to quarantine the material is often associated with tissue damage following the release of lysosomal enzymes and reactive oxygen species.,
During acrylic trimming by straight fissure bur, prevention of damage to intraoral tissue at the docking site is an additive benefit imparted by the putty material. The use of high-speed airotor can cause excessive vibration and break the cement seal securing the appliance. Hence, slow speed micromotor was used for trimming of acrylic with simultaneous irrigation and continuous suction. However, active irrigation alone could not have protected all the docking and distraction sites simultaneously. Thus, it was planned to use putty material to cover all the three sites. Furthermore, precaution should be taken to avoid mixing putty material with gloved hands because powder in the gloves interferes with setting of putty material.
| Conclusion|| |
HYDIS-TB is a successful appliance for the closure of large alveolar cleft defect. The use of putty material at the surgical site facilitates normal healing by preventing infection at the surgical site. Thus, this modification acts as an adjunct to the present HYDIS-TB appliance to enhance its usefulness.
Financial support and sponsorship
Conflicts of interest
There are no conflicts of interest.
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[Figure 1], [Figure 2], [Figure 3], [Figure 4]